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Tytuł:
On the regularization error of state constrained Neumann control problems
Autorzy:
Krumbiegel, K.
Rosch, A.
Powiązania:
https://bibliotekanauki.pl/articles/969594.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Instytut Badań Systemowych PAN
Tematy:
optimal control
elliptic equation
state constraints
boundary control
regularization
virtual control
Opis:
A linear elliptic optimal control problem with point-wise state constraints in the interior of the domain is considered. Furthermore, the control is given on the boundary with associated constraints. An artificial distributed control is introduced in the cost functional, in the state equation and in the state constraints. Since there are no control constraints for the artificial control, efficient numerical methods can be easily established. Based on a possible violation of the pure pointwise state constraints, an error estimate for the regularization error is derived. The theoretical results are illustrated by numerical tests.
Źródło:
Control and Cybernetics; 2008, 37, 2; 369-392
0324-8569
Pojawia się w:
Control and Cybernetics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling and control of an omnidirectional mobile manipulator
Autorzy:
Djebrani, S.
Benali, A.
Abdessemed, F.
Powiązania:
https://bibliotekanauki.pl/articles/330102.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
manipulator mobilny
sterowanie impedancyjne
logika rozmyta
holonome mobile manipulators
input state linearization
virtual impedance control
fuzzy logic
Opis:
A new approach to control an omnidirectional mobile manipulator is developed. The robot is considered to be an individual agent aimed at performing robotic tasks described in terms of a displacement and a force interaction with the environment. A reactive architecture and impedance control are used to ensure reliable task execution in response to environment stimuli. The mechanical structure of our holonomic mobile manipulator is built of two joint manipulators mounted on a holonomic vehicle. The vehicle is equipped with three driven axles with two spherical orthogonal wheels. Taking into account the dynamical interaction between the base and the manipulator, one can define the dynamics of the mobile manipulator and design a nonlinear controller using the input-state linearization method. The control structure of the robot is built in order to demonstrate the main capabilities regarding navigation and obstacle avoidance. Several simulations were conducted to prove the effectiveness of this approach.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2012, 22, 3; 601-616
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Robin Heart system moelling an training in virtual reality
Autorzy:
Nawrat, Z.
Koźlak, M.
Powiązania:
https://bibliotekanauki.pl/articles/384441.pdf
Data publikacji:
2007
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
surgical robot
virtual reality
control
Opis:
Paper presents prototype surgical robot Robin Heart. It is computer-controlled and based on EON reality software. The structure control and motion possibilities of the robot are shown. Then its working in virtual reality environment is described. For less invasive surgery 3D issues are crucial.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2007, 1, 2; 62-66
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation tests of adaptive control strategies for CNC machine tools
Autorzy:
Stryczek, Roman
Szczepka, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/100146.pdf
Data publikacji:
2019
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
adaptive control
processing simulation
virtual reality
intelligent machining
Opis:
The issue addressed in the article concerns the current needs and possibilities of computer-aided design of adaptive control strategies in machining processes. A simulative method of selecting the adaptive feed control strategy while rough turning materials difficult to machine, effective and inexpensive in its implementation, based on controlling the load placed on the machine's drives, has been presented. The results of a number of virtual tests of the proposed feed control strategy have been included, while paying particular attention to the stability of the machining process during moments of sudden change in the machining allowance. The obtained results meet the accepted quality indicators of the control algorithm. At the same time, the experiences collected by the author while conducting the tests confirmed the complexity of the issue and the resulting necessity to implement a comprehensive simulation testing program.
Źródło:
Journal of Machine Engineering; 2019, 19, 2; 73-82
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automatic Strategies for Autonomous Virtual Characters
Autorzy:
Lach, E.
Powiązania:
https://bibliotekanauki.pl/articles/93027.pdf
Data publikacji:
2007
Wydawca:
Uniwersytet Przyrodniczo-Humanistyczny w Siedlcach
Tematy:
genetic programming
task control
machine learning
virtual characters animation
Opis:
Technique presented in the paper concerns automatic generation of strategies controlling virtual characters’ behaviour. Virtual people are currently widely used in many applications, especially in computer games, films and educational systems. A lot of researches focus on creating intelligent characters capable of deciding about their actions. The fully acceptable solution has not yet been found. The paper presents the problem of generating strategies by means of modified genetic programming. A new Guide-Path technique is introduced.
Źródło:
Studia Informatica : systems and information technology; 2007, 2(9); 57-68
1731-2264
Pojawia się w:
Studia Informatica : systems and information technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design of holonic manufacturing systems
Autorzy:
Van Brussel, H.
Valckenaers, P.
Powiązania:
https://bibliotekanauki.pl/articles/99591.pdf
Data publikacji:
2017
Wydawca:
Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:
holonic manufacturing systems
integration
control
reference architecture
virtual execution
Opis:
The introduction of CIM (Computer Integrated Manufacturing) systems in the 1980s, aiming at integrating automatic workstations into fully automated factories, was not successful. The root causes of this failure were that the subsystems to be integrated were not suitably designed for easy integration into a larger system. This situation stimulated the authors to embark on a research programme on ‘design for the unexpected’. It defined how subsystems have to be designed so that integration into larger systems becomes easier and how such an integrated system can be controlled so that it can cope with change and disturbances. In the paper, the design principles and salient features of holonic manufacturing systems (HMS) are outlined. The PROSA reference architecture, defining the basic structure of any HMS, is described. It is further explained how coordination and control of the HMS is achieved by a holonic manufacturing execution system (HMES), based on the combination of the PROSA reference architecture and a biologically inspired Delegate Multiagent System (DMAS). Finally, the power and universality of the PROSA/DMAS system is demonstrated by some case studies from manufacturing, robotics and open air engineering.
Źródło:
Journal of Machine Engineering; 2017, 17, 3; 5-23
1895-7595
2391-8071
Pojawia się w:
Journal of Machine Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Frequency control of voltage sourced converter-based multi-terminal direct current interconnected system based on virtual synchronous generator
Autorzy:
Li, Congshan
Zhang, Xiaowei
He, Ping
Zhen, Zikai
Zhao, Kefeng
Powiązania:
https://bibliotekanauki.pl/articles/27309962.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
adaptive droop control
power margin
VSG
virtual synchronous generator
Opis:
In response to the inability of the flexible DC transmission system connected to the AC grid under conventional control strategies to provide inertia to the system as well as to participate in frequency regulation, a virtual synchronous generator (VSG) control strategy is proposed for a voltage source converter (VSC)-based multi-terminal high-voltage direct current (VSC-MTDC) interconnection system. First, the virtual controller module is designed by coupling AC frequency and active power through virtual inertia control, so that the VSC-MTDC system can provide inertia response for AC grid frequency. Second, by introducing the power margin of the converter station into the droop coefficient, the unbalanced power on the DC side is reasonably allocated to reduce the overshoot of the DC voltage in the regulation process. Finally, the power regulation capability of the normal AC system is used to provide power support to the fault end system, reducing frequency deviations and enabling inter-regional resource complementation. The simulation model of the three-terminal flexible DC grid is built in PSCAD/EMTDC, and the effectiveness of the proposed control strategy is verified by comparing the conventional control strategy and the additional frequency control strategy.
Źródło:
Archives of Electrical Engineering; 2023, 72, 4; 971--986
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Information technologies in the context of virtual organizations development
Autorzy:
Kalinowska, B.
Powiązania:
https://bibliotekanauki.pl/articles/384231.pdf
Data publikacji:
2008
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
competitiveness economy
virtual enterprise
management
control systems
knowledge economy
Opis:
The aim of this paper is to present the influence of information technologies (IT) on the organization structure, particularly in the context of virtual organizations’ (VO) development. The work describes examples and new models of virtual organizations. Subject connected with this type of organization is comparatively young and has appeared in the Internet era. Thanks to the development of communication technology enterprises can function in more elastic and competitive way: in innovative virtual forms. This new type of organizations will enlarge their market share. There are possibilities to reduce costs and be more competitive in the same time. Electronic and computer systems make the fundaments of the virtual organization management. Main activities of such organization are: information flow control, planning, production, service, distribution of products, and promotion. In the global economy virtual projects can be perceived as an optimal model of the organization activity. The new organizations are aiming to reinforce their competitive position, as well as to increase the profitability; they have also to take care of the smallest project details, the exact control of costs and optimisation of schedules. Virtual projects and organizations are still not well recognized. New researches should be taken up in this field.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2008, 2, 3; 58-61
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Double Panel Structure for Active Control of Noise Transmission
Autorzy:
Morzyński, L.
Szczepański, G.
Powiązania:
https://bibliotekanauki.pl/articles/176968.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
noise
sound insulating enclosure
active structural acoustic control
virtual microphone
Opis:
Passive noise reduction means are commonly used to reduce noise in the industry but, unfortunately, their effectiveness is poor in the low frequency range. By applying active structural acoustic control to the enclosure walls significant improvement of the insulating properties in this frequency range can be achieved. In this paper a model of double panel structure with ASAC is presented. The structure consists of two aluminium plates separated by an air gap. Two inertial magnetoelectric actuators and two piezoceramic MFC sensors were used for controlling the structure. A multichannel FxLMS algorithm with virtual error microphone technique is used as a control algorithm. The signal of a virtual error microphone is extrapolated basing on signals from MFC sensors. Performance of this actively controlled structure for tonal signals at selected frequencies is presented in the article. During the study, a double panel structure was mounted on one wall of sound insulating enclosure located in an acoustic chamber. During the measurements local and global reduction of noise test signal was investigated.
Źródło:
Archives of Acoustics; 2018, 43, 4; 689-696
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quiet Zone for the patient in an Ambulance : Active Noise Control Technology for Siren Noise Reduction
Autorzy:
Sharma, M. K.
Vig, R.
Pal, R.
Shantharam, V.
Powiązania:
https://bibliotekanauki.pl/articles/177099.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
active noise control
ANC
virtual sensing technique
ambulance siren noise
zone of silence
feedforward ANC
virtual ANC
Opis:
This paper proposes an active noise control (ANC) application to attenuate siren noise for the patient lying inside ambulance with no sound proofing. From the point of cost effectiveness, a local ANC system based on feedforward scheme is considered. Further, to handle the limitation of limited Zone of Silence (ZoS), the ANC based on virtual sensing is explored. The simulations are done in MATLAB for the recorded ambulance siren noise signal. The results indicate that ANC can be an effective solution for creating a silent environment for the patient.
Źródło:
Archives of Acoustics; 2018, 43, 2; 275-281
0137-5075
Pojawia się w:
Archives of Acoustics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A decentralized control strategy to bring back frequency and share reactive power in isolated microgrids with virtual power plant
Autorzy:
Khanjanzadeh, Amir
Soleymani, Soodabeh
Mozafari, Babak
Powiązania:
https://bibliotekanauki.pl/articles/2173517.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
PFDC
power-frequency droop control
VPP
virtual power plant
microgrid
virtual impedance
decentralized control
kontrola spadku częstotliwości zasilania
elektrownia wirtualna
mikrosieci
wirtualna impedancja
zdecentralizowana kontrola
Opis:
In this paper, a novel Power-Frequency Droop Control (PFDC) is introduced to perfectly bring back the system frequency and share the reactive power in isolated microgrid with virtual power plant (VPP). The frequency-based power delivery must be essentially implemented in VPP which can operate as a conventional synchronous generator. It has been attained by enhancing the power processing unit of each VPP to operate as an active generator. The inverter coupling impedance which has been assigned by the virtual impedance technique has reduced the affected power coupling resulting from line resistance. The reference has been subsequently adjusted to compensate the frequency deviation caused by load variation and retrieve the VPP frequency to its nominal value. In addition, the line voltage drop has compensated the voltage drop and load sharing error to obliterate the reactive power sharing imprecision resulting from the voltage deviation. The voltage feedback confirms the correct voltage after compensating the voltage drop. As an illustration, conventional PFDC after a load change cannot restore the system frequency which is deviated from 50 Hz and rested in 49.9 Hz while, proposed PFDC strategy fades away the frequency deviation via compensating the variation of the frequency reference. Likewise, the frequency restoration factor ( γ) has an effective role in retrieving the system frequency, i.e., the restoration rate of the system frequency is in proportion with γ. As a whole, the simulation results have pointed to the high performance of proposed strategy in an isolated microgrid.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; art. no. e136190, 1--9
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A decentralized control strategy to bring back frequency and share reactive power in isolated microgrids with virtual power plant
Autorzy:
Khanjanzadeh, Amir
Soleymani, Soodabeh
Mozafari, Babak
Powiązania:
https://bibliotekanauki.pl/articles/2090692.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
PFDC
power-frequency droop control
VPP
virtual power plant
microgrid
virtual impedance
decentralized control
kontrola spadku częstotliwości zasilania
wirtualna elektrownia
mikrosieci
wirtualna impedancja
zdecentralizowana kontrola
Opis:
In this paper, a novel Power-Frequency Droop Control (PFDC) is introduced to perfectly bring back the system frequency and share the reactive power in isolated microgrid with virtual power plant (VPP). The frequency-based power delivery must be essentially implemented in VPP which can operate as a conventional synchronous generator. It has been attained by enhancing the power processing unit of each VPP to operate as an active generator. The inverter coupling impedance which has been assigned by the virtual impedance technique has reduced the affected power coupling resulting from line resistance. The reference has been subsequently adjusted to compensate the frequency deviation caused by load variation and retrieve the VPP frequency to its nominal value. In addition, the line voltage drop has compensated the voltage drop and load sharing error to obliterate the reactive power sharing imprecision resulting from the voltage deviation. The voltage feedback confirms the correct voltage after compensating the voltage drop. As an illustration, conventional PFDC after a load change cannot restore the system frequency which is deviated from 50 Hz and rested in 49.9 Hz while, proposed PFDC strategy fades away the frequency deviation via compensating the variation of the frequency reference. Likewise, the frequency restoration factor ( γ) has an effective role in retrieving the system frequency, i.e., the restoration rate of the system frequency is in proportion with γ. As a whole, the simulation results have pointed to the high performance of proposed strategy in an isolated microgrid.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; e136190, 1--9
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A flexible control strategy for shoreto- ship power system in terms of gridconnected and off-grid switch
Autorzy:
Ji, Z.
Zhao, Z.
Wang, J.
Lv, Z.
Powiązania:
https://bibliotekanauki.pl/articles/259487.pdf
Data publikacji:
2018
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
shore power supply
ship power system
virtual synchronous generator
flexible control
Opis:
There are promising application prospects for applying the shore power technology to the ships in the port for the purpose of pollution prevention. However, the grid-connection of the shore power supply to the ship power grid leads to current surges, damages the ship power consumption equipment, and results in the instability of the ship power grid system, which will seriously affect the reliability of the operation of the ship power grid system. In order to address this problem, the mathematical model of virtual synchronous generator is introduced in this paper. Then, a control method for the flexible grid-connection of the shore power supply to the ship power grid based on the virtual synchronous generator is proposed. Next, the output characteristics of the shore power supply are optimized to match the characteristics of the ship generator, which contributes to the flexible grid-connection of the shore power supply to the ship power grid system. The effectiveness and the feasibility of this method are verified by simulation and experiments.
Źródło:
Polish Maritime Research; 2018, S 2; 139-148
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Simulation of Conveyor Control System Using the Virtual Commissioning and Virtual Reality
Autorzy:
Ružarovský, Roman
Holubek, Radovan
Sobrino, Daynier Rolando Delgado
Janíček, Matej
Powiązania:
https://bibliotekanauki.pl/articles/102430.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
simulation
conveyor control
sensors integration
virtual commissioning
virtual reality
symulacja
kontrola przenośnika
integracja czujników
wirtualne uruchamianie
wirtualna rzeczywistość
Opis:
Designing of the conveyors and its control system with control program through the design tool “Virtual Commissioning” is very important in the digital era Industry 4.0. Virtual Commissioning was recently used to perform realistic virtual simulations in the early stages of development processes in automation of the conveyors too. The main benefit is the possibility of integrating and testing the control system through the simulation on the virtual model even before physically constructing the conveyor. The contribution focuses on the possibilities of transforming a real conveyor into a virtual model in the Siemens Tecnomatix Process Simulate program and integrating the Siemens S7-300 real control system to control the conveyor itself. In the model it was allowed to test and perform numerous variations and situations without physical intervention into the real conveyor and possible damage functional parts including through virtual reality. These experiments were subsequently evaluated and the control system optimized with respect to material flow and the developed PLC code on virtual model was verified on real conveyor control system.
Źródło:
Advances in Science and Technology. Research Journal; 2018, 12, 4; 164-171
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Virtual Reality for Stroke Rehabilitation: assessment, training and the effect of virtual therapy
Rzeczywistość wirtualna w rehabilitacji poudarowej – badania, trening i efekty terapii wirtualnej
Autorzy:
Kiper, Paweł
Turolla, Andrea
Piron, Lamberto
Agostini, Michela
Baba, Alfonc
Rossi, Simonetta
Tonin, Paolo
Powiązania:
https://bibliotekanauki.pl/articles/1957144.pdf
Data publikacji:
2010
Wydawca:
Akademia Wychowania Fizycznego im. Bronisława Czecha w Krakowie
Tematy:
Stroke
rehabilitatio
virtual reality
motor control
udar mózgu
rehabilitacja
rzeczywistość wirtualna
kontrola ruchu
Opis:
The motor function impairment deriving from stroke injury has a negative impact on autonomy and on the activities of daily living. Several studies have demonstrated that learning new motor skills is important to induce neuroplasticity and functional recovery. To facilitate the activation of brain areas and consequently neuroplasticity, it may be advantageous to combine traditional motor rehabilitation with innovative technology, in order to promote motor re-learning and skill re-acquisition by means of an enhanced training. Following these principles, exercises should involve multiple sensory modalities exploiting the adaptive nature of the nervous system, in order to promote active patient participation. Movement re-learning could be improved by means of training in an enriched environment focused on optimizing the affordances between the motor system and the physical environment: virtual reality technologies allow for the possibility to create specific settings where the affordances are optimized. Several autors report that patients treated in virtual representation could, in both acute and chronic stroke, improve their arm motor function. Reinforced Feedback in a Virtual Environment (RFVE), can incorporate the elements necessary to maximize motor learning, such as repetitive and differentiated task practice, feedback of performance and results, and reinforcement of the motivation. The RFVE approach may lead to better rehabilitation outcomes in the treatment of the upper limb in stroke patients.
Upośledzenie funkcji ruchowych związanych z udarem mózgu ma w przypadku wielu chorych negatywny wpływ na samodzielność i na czynności Ŝycia codziennego i osoby te muszą być poddawane długotrwałej rehabilitacji. Liczne badania wykazały, że uczenie się nowych umiejętności motorycznych pobudza neuroplastyczność mózgu i w efekcie umożliwia poprawę funkcjonalną. W celu ułatwienia aktywacji obszarów mózgu, a w konsekwencji neuroplastyczności, korzystne może być łączenie tradycyjnej rehabilitacji ruchowej z innowacyjną technologią tak, aby poprzez wzmocniony trening promować ponowne uczenie się ruchu i ponowne nabywania umiejętności funkcjonalnych. W myśl tej zasady, wykorzystując adaptacyjne zdolności układu nerwowego, ćwiczenia powinny angażować wiele zmysłów i wymuszać aktywny udziału pacjenta. Trening ponownego uczenia się ruchu może być skuteczniejszy we wzbogaconym przez sprzężenie zwrotne środowisku koncentrując się na optymalizacji intrakcji osoby z komputerem między układem ruchu a fizycznym środowiskiem: technologia rzeczywistości wirtualnej dopuszcza możliwość utworzenia specjalnych ustawień, gdzie interakcja człowieka z komputerem jest zoptymalizowana. Wzmocnione sprzężenie zwrotne w środowisku wirtualnym (RFVE) może zawierać elementy potrzebne do maksymalizacji efektu uczenia się ruchu, np. praktyka powtarzających się i zróżnicowanych zadań, zastosowanie sprzężenia zwrotnego w odniesieniu do działania i efektu działania, oraz zwiększona motywacja. Zastosowanie RFVE może prowadzić do lepszych wyników w usprawnianiu niedowładnej kończyny górnej u pacjentów z udarem mózgu
Źródło:
Medical Rehabilitation; 2010, 14(2); 23-32
1427-9622
1896-3250
Pojawia się w:
Medical Rehabilitation
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of research engine control unit using FPGA - based embedded control system
Autorzy:
Anand, B. P.
Saravanan, C. G.
Powiązania:
https://bibliotekanauki.pl/articles/246480.pdf
Data publikacji:
2012
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
ECU
RECU
engine control algorithm
LabVIEW
virtual instrumentation
FPGA
fuel map
automotive sensor
Opis:
Though the Electronic Control Unit (ECU) systems are wide use in modern vehicles, they are manufactured by a few companies and supplied to engine manufacturers. Automotives with factory made ECUs designed to maximize the performance while minimize cost. However, factory made ECUs (FECU) have closed software and hardware. The control gain, lookup tables, and constants used in the algorithms are also calibrated for a particular engine design. Unlike the carburettor, these systems cannot be opened and studied under different operating conditions to determine their characteristics and how they influence the performance of an engine. They can be used as black boxes and work only at specified modes as determined by their electronic control unit (ECU) and more over the algorithms and their implementation are maintained as trade secret by the developers. In the research work, it often becomes necessary to study parameters like injection duration, injection timing, sensor responses etc. to ascertain their effects. Thus in such cases the factory made ECU supplied with the injection system cannot be used. The required need is fulfilled by developing a customized electronic controller that would be suitable for studying the variations at engine operating points. The project involved the development of a research ECU (RECU) using reconfigurable field programmable gate arrays (FPGA) based embedded control system for a four-stroke port fuel injected gasoline engine. A calibrated fuel map is generated for various operating points of the engine using virtual instrumentation (VI) based software while simulating functions of sensors. From the mapping, the fuel injection time and fuel delivery quantity is estimated for the required running conditions of the engine. The developed Research Electronic Control Unit (RECU) could reveal gasoline engine performance in particular for research-based applications as it involves frequent programme development and control implementations.
Źródło:
Journal of KONES; 2012, 19, 3; 9-18
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of changing frequency and various sceneries on stabilometric parameters and on the effect of adaptation in an immersive 3D virtual environment
Autorzy:
Jurkojc, J.
Wodarski, P.
Bieniek, A.
Gzik, M.
Michnik, R.
Powiązania:
https://bibliotekanauki.pl/articles/306890.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
wirtualna rzeczywistość
stabilografia
3D
virtual reality
balance control
center of pressure
posturography
Opis:
Purpose: The aim of the study was to examine the influence of different types of virtual sceneries and frequencies of movement of visual disturbances on stabilometric values as well as whether individual sceneries and changing frequency can minimize effect of adaptation of tested person to applied disturbances. Methods: There were 23 healthy participants. A person has been standing on a Zebris stabilometric platform. Virtual 3D environment was displayed by means of HMD Oculus Rift system. An open (a meadow) and closed (a room) sceneries were used. The sceneries moved along the sagittal axis and rotated around horizontal axis. The measurement lasted 30 seconds and in the middle of it frequency of translational movement was changed from 0.7 Hz to 1.4 Hz or from 1.4 Hz to 0.7 Hz. Results: The data were reported as medians of COP velocity and ellipse area. Visual disturbances caused the increase of these values in comparison with the tests conducted with open eyes. Results divided into periods (the first and the second 15 seconds) showed that in the first half of the test values were higher compared to the second half. The comparison of values obtained for open and closed scenery showed that higher values were recorded for open scenery. Conclusions: The comparison of both types of sceneries on the basis of COP velocity and ellipse area showed that open scenery had a greater impact on the measured stabilometric values. It was found out as well that people got accustomed to the applied disturbances, but this effect was lower in the open scenery.
Źródło:
Acta of Bioengineering and Biomechanics; 2017, 19, 3; 129-137
1509-409X
2450-6303
Pojawia się w:
Acta of Bioengineering and Biomechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of control parameters on synchronization stability of virtual synchronous generator
Autorzy:
Zhang, Yanxia
Cheng, Yachao
Liu, Kaixiang
Han, Yue
Powiązania:
https://bibliotekanauki.pl/articles/2172794.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
control parameter
frequency modulation coefficient
phase plane method
synchronization stability
virtual synchronous generator
Opis:
Different from the synchronization mechanism of synchronous generators, the non-synchronous generators must be synchronized with the grid through a controller. Generally, the virtual synchronous generator (VSG) control strategy is adopted for this purpose. In view of the current situation, where the control loops are not comprehensively considered in the research of the synchronization stability of the VSG, this paper considers multiple control loops, such as active frequency loops, virtual governors, power filters and current constraint control, to establish the mathematical model of the VSG and infinite system. On this basis, the correlation formula between power angle difference and control parameters is deduced. Adopting the phase plane method, the influence of different control loops and their parameters on the transient synchronization stability is analyzed. Finally, a setting principle of the frequency modulation coefficient of virtual governors is proposed, which not only meets the response speed of control systems, but also has good control performance.
Źródło:
Archives of Electrical Engineering; 2022, 71, 4; 811--828
1427-4221
2300-2506
Pojawia się w:
Archives of Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Projekt dwuramiennego robota sterowanego przez teleoperatora z wykorzystaniem technik rzeczywistości wirtualnej
Autorzy:
Grabowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/303239.pdf
Data publikacji:
2018
Wydawca:
Wydawnictwo Druk-Art
Tematy:
roboty mobilne
rzeczywistość wirtualna
teleobecność
zdalne sterowanie
mobile robots
virtual reality
telepresence
remote control
Opis:
Zastosowanie koncepcji teleobecności umożliwia odsunięcie, na dowolną odległość, osoby realizującej pracę od miejsca wykonywania pracy. Pozwala to na realizację pracy w strefie zagrożenia lub strefie niebezpiecznej bez narażenia życia lub zdrowia człowieka w związku z ekspozycją związaną np. z wysokimi stężeniami szkodliwych substancji chemicznych. Ponadto separacja podejmującego decyzję człowieka od wykonującego pracę efektora uniezależnia zakres realizowanych przez robota prac od możliwości fizycznych człowieka, w szczególności udźwig robota nie jest w żaden sposób limitowany przez możliwości fizyczne osoby sterującej pracą robota. Jest to szczególną zaletą w przypadku osób starszych i/lub z niepełnosprawnościami.
The tele-presence enable to separate, at any distance, a worker from workplace. This allows to perform work in a hazardous area without endangering human life or health due to exposure associated with, for example, high concentrations of harmful chemicals. In addition, the separation of the decision-making man from the effector performing the work, makes the scope of the work carried out by the robot independent of the human’s physical capabilities, in particular the lifting capacity is in no way limited by the physical capabilities of the person controlling the robot’s work. This is a special advantage for older people and/or people with disabilities.
Źródło:
Napędy i Sterowanie; 2018, 20, 2; 46-50
1507-7764
Pojawia się w:
Napędy i Sterowanie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Use of VR to Analyze the Profitability of the Construction of a Robotized Station
Autorzy:
Muszyńska, Magdalena
Szybicki, Dariusz
Gierlak, Piotr
Kurc, Krzysztof
Burghardt, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/175853.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
virtual reality
RobotStudio software
signal processing
real robot
programming robot
robot-operated quality control
Opis:
The development of software applications and the use of VR (Virtual Reality) techniques allow to improve the company’s financial result. The construction of models of robotic stations with robots using Virtual Robot technology allows to determine the time of the machining process. It allows its optimization through the selection of accelerations, tools, tooling strategies, and so on. Determining the time of a technological operation translates into savings. This allows you to decide on the purposefulness of the investment. In addition, modern software add-ons, for example, Signal Analyzer in RobotStudio, allow you to monitor the electricity consumption of a robotic station. The article presents a solution showing how, based on the construction of digital models and the use of VR, we can conclude about the profitability of the investment.
Źródło:
Advances in Manufacturing Science and Technology; 2020, 44, 1; 32-37
0137-4478
Pojawia się w:
Advances in Manufacturing Science and Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Przykłady zastosowania zintegrowanego środowiska programistycznego MATLAB&Simulink do komputerowej symulacji wybranych układów sterowania
Application of MATLAB&Simulink software for examination the selected control systems
Autorzy:
Chamela, W.
Chrzan, M.
Pietruszczak, D.
Powiązania:
https://bibliotekanauki.pl/articles/313207.pdf
Data publikacji:
2017
Wydawca:
Instytut Naukowo-Wydawniczy "SPATIUM"
Tematy:
MATLAB/Simulink
symulacja układów sterowania
wirtualne środowisko pracy
simulation of control systems
virtual work environment
Opis:
W artykule przedstawiono możliwości zastosowania zintegrowanego środowiska programistycznego MATLAB&Simulink do komputerowej symulacji wybranych układów sterowania. MATLAB (MATrix LABoratory) to program komputerowy będący interaktywnym środowiskiem do wykonywania obliczeń naukowych i inżynierskich, służącym do tworzenia symulacji komputerowych, zaś Simulink to część pakietu numerycznego MATLAB dający możliwość symulacji komputerowych modeli przy pomocy interfejsu graficznego oraz tzw. bloków. W artykule podano przykłady symulacji rozwiązań równań różniczkowych zwyczajnych, wyznaczania różnych typów charakterystyk częstotliwościowych; badania stabilności układów na podstawie kryterium Hurwitza i Nyquista; badania stabilności, sterowalności i obserwowalności układów wielowymiarowych; wyznaczania portretu fazowego oraz regulacji dwupołożeniowej.
The paper presents the possibilities of using the integrated environment of MATLAB&Simulink for computer simulation of selected control systems. MATLAB (matrix laboratory) is a multi-paradigm numerical computing environment and fourth-generation programming language. A proprietary programming language developed by Math-Works, MATLAB allows matrix manipulations, plotting of functions and data, implementation of algorithms, creation of user interfaces, and interfacing with programs written in other languages. Simulink, also developed by MathWorks, is a graphical programming environment for modeling, simulating and analyzing dynamic systems. It offers tight integration with the rest of the MATLAB environment and can either drive MATLAB or be scripted from it. The paper shows examples of solutions of ordinary differential equations, determination of different types of frequency characteristics, system stability tests based on the Hurwitz and Nyquist criteria, stability testing, controllability and observability of multidimensional systems, creation of phase-portrait and study of two-position control.
Źródło:
Autobusy : technika, eksploatacja, systemy transportowe; 2017, 18, 12; 753-760, CD
1509-5878
2450-7725
Pojawia się w:
Autobusy : technika, eksploatacja, systemy transportowe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wirtualne prototypowanie układu sterowania pochylania i przechylania śmigłowca jednowirnikowego w układzie klasycznym
Virtual prototyping of control system in terms of angling and tilting of classic type single-engine helicopter
Autorzy:
Kania, M.
Ferdynus, M.
Powiązania:
https://bibliotekanauki.pl/articles/395613.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
sterowanie
śmigłowiec
układ sterowania
CATIA V5
wirtualne prototypowanie
control system
steering
helicopter
virtual prototyping
Opis:
W publikacji przedstawiono wirtualny prototyp układu sterowania śmigłowcem w aspekcie jego pochylania i przechylania. Model daje możliwość wszechstronnych badań bez konieczności budowy rzeczywistego prototypu.
The paper presents a virtual prototype of a helicopter control system in terms of angling and tilting. The model allows comprehensive tests without having to build an actual prototype.
Źródło:
Postępy Nauki i Techniki; 2011, 6; 164-171
2080-4075
Pojawia się w:
Postępy Nauki i Techniki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mini-DCS system programming in IEC 61131-3 structured text
Autorzy:
Rzońca, D.
Sadolewski, J.
Stec, A.
Świder, Z.
Trybus, B.
Trybus, L.
Powiązania:
https://bibliotekanauki.pl/articles/384239.pdf
Data publikacji:
2008
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
mini-DCS system
control program execution
ST language
compiler
IEC 61131-3 standard
virtual processor
Opis:
A prototype environment called CPDev for programming small distributedsmall-distributed control-and-measurement systems in Structured Text language of IEC 61131-3 standard is presented . The environment is open what means that the code generated by the compiler can be executed on different hardware platforms. However, such universal code must be processed by an interpreter, another words by a virtual machine,an interpreter, another words by- a virtual machine, must process such universal code similarly as programs written in Java. The CPDev environment consists of the compiler, simulator and configurer of hardware resources (i.e. communications). They are developed in C# at MS.NET Framework 2.0 platform. CPDev is open allowing the user to create function blocks and libraries. External interface procedures (drivers) can be written by hardware designers and linked with the universal code. Free selection of data types required by different applications is provided. Virtual machine written in ANSI C is dedicated for a particular processor. So far the machines for AVR, MCS-51 and PC have been developed. Programming a mini-DCS system from LUMEL Zielona Góra has been the first application of CPDev.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2008, 2, 3; 48-54
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Utilization of methods of artificial intelligence for detecting manufacturing defects in hydraulic elements
Wykorzystanie metod sztucznej inteligencji do wykrywania błędów podczas wytwarzania elementów hydraulicznych
Autorzy:
Ciężobka, M.
Lisowski, E.
Powiązania:
https://bibliotekanauki.pl/articles/395206.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
system kontroli jakości
stereowizja
monitoring
trójwymiarowa mapa wirtualna
quality control system
stereovision
3D virtual map
Opis:
This paper presents the work conducted in the Institute of Applied Computer Science of Cracov Technical University, related with a novel quality control system for hydraulic elements. Verification of individual objects will take place in the CAD system, which provides the user with selection of desired details, and thanks to implementation of the most modern methods of knowledge engineering, it is also possible to change the monitoring target without introducing any changes in the underlying software. The described application operates in real-time at the production line.
W artykule przedstawiono prace prowadzone w Instytucie Informatyki Stosowanej Politechniki Krakowskiej, związanych z nowym systemem sterowania jakością przy wytwarzaniu elementów hydraulicznych. Weryfikacja poszczególnych obiektów odbywa się w systemie CAD, który umożliwia użytkownikowi wybór żądanych elementów, a dzięki wdrażaniu najnowocześniejszych metod zarządzania danymi, możliwa jest także zmiana obiektu monitorowania, bez konieczności wprowadzania żadnych zmian w podstawowe oprogramowanie. Przedstawiona w artykule aplikacja działa w czasie rzeczywistym na linii produkcyjnej.
Źródło:
Postępy Nauki i Techniki; 2011, 7; 157-168
2080-4075
Pojawia się w:
Postępy Nauki i Techniki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rotor Resistance Estimator based on Virtual Current Sensor Algorithm for Induction Motor Drives
Autorzy:
Adamczyk, Michał
Powiązania:
https://bibliotekanauki.pl/articles/1193854.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
induction motor drive
rotor resistance estimator
model reference adaptive system
virtual current sensor
fault tolerant control
Opis:
In this article, model reference adaptive system (MRAS)-based estimator of a rotor resistance of an induction motor (IM) is presented. In contrast to the solutions known from the literature, the reference model of this estimator uses the measured values of the phase current and the adaptive part is a virtual current sensor. The article presents an accurate description of the algorithm taking into account the discrete equations for possible practical implementation in the microprocessor system. In the first step, the impact of motor parameters to stator current estimation quality in the adaptive model was checked. Subsequently, simulation tests of the proposed rotor resistance estimator were carried out for the field-oriented control of the induction motor drive system with a model of an induction motor with fixed parameters and an induction motor with a changing main inductance according to a magnetisation curve. The analysis of the estimator’s work showed its high efficiency and insensitivity to changes in the IM main inductance.
Źródło:
Power Electronics and Drives; 2020, 5, 40; 143-156
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
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