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Wyszukujesz frazę "position control" wg kryterium: Temat


Tytuł:
Position tracking systems for AC drives employing forced dynamics control
Autorzy:
Vittek, J.
Gorel, L.
Vavrus, V.
Struharnansky, L.
Powiązania:
https://bibliotekanauki.pl/articles/1193302.pdf
Data publikacji:
2017
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
position control
AC drives
vector control
forced dynamics control
observer
Opis:
Position tracking systems for AC drives offering high robustness to external load torques have been presented. A triple-loop cascade control structure was employed where the inner loop is a stator current control loop and the middle loop is a speed control loop based on the forced dynamic control and respecting vector control principles. Two alternative outer position control loop designs both of which respect prescribed dynamics and settling time of position have been developed. The former system prescribes also time constant of the speed control loop while the latter one respects time constant of speed control system developed independently. To enhance the tracking abilities of both control systems the dynamic lag pre-compensator has been included. Case studies of the both position control systems for time near-optimal control and energy near-optimal control have been presented. The tracking performances of the designed control systems were assessed based on comparisons of the experimental responses with the simulated responses of the ideal closed-loop system.
Źródło:
Power Electronics and Drives; 2017, 2, 37/1; 89-103
2451-0262
2543-4292
Pojawia się w:
Power Electronics and Drives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Adaptive Neuro-Sliding Mode Control of PUMA 560 Robot Manipulator
Autorzy:
Medjebouri, A.
Mehennaoui, L.
Powiązania:
https://bibliotekanauki.pl/articles/384592.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
Puma 560
position control
NN
SMC
robustness
chattering
Opis:
The classical sliding mode control (SMC) is a robust control scheme widely used for dealing with nonlinear systems uncertainties and disturbances. However, the conventional SMC major drawback in real applications is the chattering phenomenon problem, which involves extremely high control activity due to the switched control input. To overcome this handicap, a pratical design method that combines an adaptive neural network and sliding mode control principles is proposed in this paper. The controller design is divided into two phases. First, the chattering phenomenon is removed by replacing the sign function included in the switched control by a continuous smooth function; basing on Lyapounov stability theorem. Then, an adaptive linear neural network, that has the role of online estimate the equivalent control in the neighborhood of the sliding manifold, is developed when the controlled plant is poorly modeled. Simulation results show clearly the satisfactory chattering free tracking performance of proposed controller when it is applied for the joints angular positions control of a 6-DOF PUMA 560 robot arm.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2016, 10, 4; 8-16
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modified position-force control for a manipulator geometrically constrained by round obstacles
Autorzy:
Mazur, Alicja
Kaczmarek, Mirela
Ratajczak, Joanna
Domski, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/950745.pdf
Data publikacji:
2019
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
manipulator
position-force control
principle of orthogonalisation
hybrid control
Opis:
This paper addresses the problem of position-force control for robot manipulators under geometric endpoint constraints defined as round obstacles. Considerations are based on hybrid position-force control and use modified Arimoto algorithm with the principle of ”orthogonalisation”. To achieve so-called joint space orthogonalisation, where motion signals are orthogonal to force vectors and the direction selection is performed in the joint space, projection matrix is utilized. The convergence of tracting and force errors is proved.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2019, 13, 2; 60-67
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative Study of Optimised Artificial Intelligence Based First Order Sliding Mode Controllers for Position Control of a DC Motor Actuator
Autorzy:
Nyong-Bassey, B. E.
Akinloye, B.
Powiązania:
https://bibliotekanauki.pl/articles/385114.pdf
Data publikacji:
2016
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
adaptive fuzzy control
DC motor position control
genetic algorithm
particle swarm optimization (PSO)
sliding mode control
Opis:
This paper aims at critically reviewing various sliding mode control measures applied to Permanent Magnet DC Motor actuator for position control. At first, a hybrid sliding mode controller was examined with its advantages and disadvantages. Then, the smooth sliding mode controller in the same manner. The shortcomings of the two methods were overcome by proper switch design and also using tanh-sinh hyperbolic function. The sliding mode controller switches on when either disturbance or noise is detected. Genetic Algorithm Computational tuning technique is employed to optimize the gains of the controllers for optimal response.The performance of the proposed controller architecture, as well as the reviewed controllers, have been compared for performance evaluation with respect to several operating conditions. This includes load torque disturbance injection, noise injection in a feedback loop, motor nonlinearity exhibited by parameters variation, and a step change in reference input demand.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2016, 10, 3; 58-71
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamic external force feedback loop control of a robot manipulator using a neural compensator - Application to the trajectory following in an unknown environment
Autorzy:
Ferguene, F.
Toumi, R.
Powiązania:
https://bibliotekanauki.pl/articles/907867.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
sterowanie położeniem
sterowanie siłowe
struktura zewnętrzna
sterowanie neuronowe
manipulator robota
force/position control
external structure
neural control
robot manipulator
Opis:
Force/position control strategies provide an effective framework to deal with tasks involving interaction with the environment. One of these strategies proposed in the literature is external force feedback loop control. It fully employs the available sensor measurements by operating the control action in a full dimensional space without using selection matrices. The performance of this control strategy is affected by uncertainties in both the robot dynamic model and environment stiffness. The purpose of this paper is to improve controller robustness by applying a neural network technique in order to compensate the effect of uncertainties in the robot model. We show that this control strategy is robust with respect to payload uncertainties, position and environment stiffness, and dry and viscous friction. Simulation results for a three degrees-of-freedom manipulator and various types of environments and trajectories show the effectiveness of the suggested approach compared with classical external force feedback loop structures.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2009, 19, 1; 113-126
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ball-and-beam laboratory system controlled by Simulink model through dedicated microcontrolled-Matlab data exchange protocol
Autorzy:
Nowopolski, K.
Powiązania:
https://bibliotekanauki.pl/articles/97435.pdf
Data publikacji:
2013
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
beam-and-ball
interface
MATLAB
Simulink
stepper motor
SimMechanics
linear position control
microcontroller
32-bit microcontroller
LQR control law
Opis:
A ball balancing on a beam is a perfect platform for demonstration various control strategies. The task is to place ball rolling freely, in a reference position along the beam driven by a motor, rejecting disturbances. The research system consists of mechanical platform with stepper motor and two infrared ball position sensors, power supply and electronic controller based on a 32-bit microcontroller connected to Matlab/Simulink software running the main control algorithm. Designed in Simulink input and output subsystem blocks contain all functions required to provide data exchange with microprocessor controller of the mechanical system. Developed data exchange protocol and its implementation both in microcontroller software and Simulink subsystems allow to use this complete system for educational purposes: the controller designer is free to develop supervisory control layer, not going into details of system operation. The results of system operation with P, PD and LQR control laws are shown at the end of this paper.
Źródło:
Computer Applications in Electrical Engineering; 2013, 11; 310-320
1508-4248
Pojawia się w:
Computer Applications in Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High-performance PMSM servo-drive with constrained state feedback position controller
Autorzy:
Tarczewski, T.
Skiwski, M.
Niewiara, L. J.
Grzesiak, L. M.
Powiązania:
https://bibliotekanauki.pl/articles/200374.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
constrained control
model predictive approach
permanent magnet synchronous motor
position control
state feedback control
model predykcyjny
silnik synchroniczny z magnesem trwałym
sprzężenie zwrotne
Opis:
This paper describes high-performance permanent magnet synchronous motor (PMSM) servo-drive with constrained state feedback (SFC) position controller. Superior behavior of the control system has been achieved by applying SFC with constraints handling method based on a posteriori model predictive approach (MPAC). The concept utilizes predictive equations obtained from discrete-time model of the PMSM to compute control signals which generate admissible values of the future state variables. The novelty of the proposed solution lies in the limitation of several state-space variables in servo-drive control system. Since MPAC has firstly been applied to limit more than one state-space variable of the plant, necessary conditions for introducing constraints into multivariable control system with SFC are depicted. Due to the low complexity of proposed algorithm, a low cost microprocessor, STM32F4, is employed to execute the state feedback position control with model predictive approach to constraints handling. Experimental results show that the proposed control method provides superior performance of PMSM servodrive with modern SiC based voltage source inverter (VSI).
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 1; 49-58
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of grinding and polishing technology for stainless steel with a robot manipulator
Autorzy:
Shaw, Jinsiang
Fang, Yu-Jia
Powiązania:
https://bibliotekanauki.pl/articles/2141789.pdf
Data publikacji:
2021
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
active compliant
hybrid position/force control
robot manipulator
surface machining
surface roughness
Opis:
In traditional industries, manual grinding and polishing technologies are still used predominantly. However, these procedures have the following limitations: excessive processing time, labor consumption, and product quality not guaranteed. To address the aforementioned limitations, this study utilizes the good adaptability of a robotic arm to develop a tool-holding grinding and polishing system with force control mechanisms. Specifically, off-the-shelf handheld grinder is selected and attached to the robotic arm by considering the size, weight, and processing cost of the stainless steel parts. In addition, for contact machining, the robotic arm is equipped with a force/torque sensor to ensure that the system is active compliant. According to the experimental results, the developed system can reduce the surface roughness of 304 stainless steel to 0.47 µm for flat surface and 0.76 µm for circular surface. Moreover, the processing trajectory is programmed in the CAD/CAM software simulation environment, which can lead to good results in collision detection and arm posture establishment.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2021, 15, 4; 37-43
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental and finite element analysis of PPF controller effectiveness in composite beam vibration suppression
Autorzy:
Mitura, Andrzej
Gawryluk, Jaroslaw
Powiązania:
https://bibliotekanauki.pl/articles/2172029.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
finite element method
positive position feedback control
composite structures
hysteresis
phenomenon
macro-fiber composite
Opis:
In this paper the problem of vibration reduction is considered. Generally, mechanical vibrations occurring during the operation of a system are undesirable and may have a negative effect on its reliability. A finite element model of a single active blade is developed using the Abaqus software. This structure consists of a multi-layer glass-epoxy composite beam with an embedded macro fiber composite (MFC) piezoelectric actuator. For vibration control the use of a positive position feedback (PPF) controller is proposed. To include the PPF controller in the Abaqus software, a special subroutine is created. The developed control algorithm code makes it possible to solve an additional differential equation by the fourth order RungeKutta method. A numerical dynamic analysis is performed by the implicit procedure. The beam responses with and without controller activation are compared. The control subsystem model also includes the hysteresis phenomenon of the piezoelectric actuator. Numerical findings regarding the PPF controller’s effectiveness are verified experimentally.
Źródło:
Eksploatacja i Niezawodność; 2022, 24, 3; 468--477
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Platforma Hexa jako system aktywnego otoczenia - konstrukcja mechaniczna i sterowanie
Hexa platform as active environment system - mechanics and control
Autorzy:
Osypiuk, R.
Powiązania:
https://bibliotekanauki.pl/articles/154875.pdf
Data publikacji:
2009
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
Manipulator Hexa
zamknięty łańcuch kinematyczny
hybrydowe sterowanie pozycja/siła
podatność pasywna i aktywna
otwarte architektury sterowania
Hexa manipulator
closed kinematic chain
hybrid force/position control
passive and active compliance
open control architectures in robotics
Opis:
W artykule zaprezentowano aktuator sztywności bazujący na platformie Hexa, który dedykowany jest do zadań sterowania momentem i siłą w aplikacjach z wykorzystaniem manipulatorów przemysłowych. Podejście to jest interesującą alternatywą dla znanych z literatury i obarczonych istotnymi wadami podatnościami pasywnymi i aktywnymi. W pracy zwrócono szczególną uwagę na konstrukcję mechaniczną platformy, do napędu której wykorzystano tanie serwa firmy Hitec, przeznaczone do zastosowań w robotyce. Omówiono proces projektowania platformy zaczynając od strony mechanicznej, poprzez napędy, elektronikę, a kończąc na otwartej architekturze sterowania.
In the paper the idea of using variable stiffness actuator was presented. The actuator is based on the Hexa platform (fig. 2) and is dedicated to force/torque control in the industrial manipulator applications. In view of high stiffness of the robots and usually high stiffness of the environment the passive and active compliant devices have to be used, e.g. to protect system against violent force changes. Many serious problems and disadvantages could be found during application of the known compliant systems [8]. These problems could be reduced by using of the variable stiffness actuator. The proposed actuator is an alternative solution and could be used on the manipulator side [9] or on the environment side [10, 11]. Description of using the passive and active compliance elements could found in chapter 2. Details of mechanic end electric construction of variable stiffness actuator with low cost robotic servos from Hitec are presented in chapter 3. Hardware interface (Fig. 3) is shown in the chapter 4 with main properties of the MiRPA (Middleware for Robotic and Process Control Applications) open control architecture system. Using of the MiRPA in rapid control prototyping systems is described in chapter 5. In the Fig. 6 the complete force control setup is presented. Experimental tests demonstrate that the assembly time of the robot tasks is shorter than in classic systems without variable stiffness actuator.
Źródło:
Pomiary Automatyka Kontrola; 2009, R. 55, nr 9, 9; 723-726
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Performance analysis between a hybrid force/position and conventional controllers for a wrist exoskeleton
Autorzy:
Avilés, Valeria
Avilés, Oscar F.
Aponte, Jorge
Caldas, Oscar I.
Mauledoux, Mauricio F.
Powiązania:
https://bibliotekanauki.pl/articles/2134891.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
exoskeleton
hybrid control
force
performance
position
Opis:
This study analyses the performances of various path controlling strategies for a 3-degrees of freedom wrist exoskeleton, by comparing key indicators, such as rise time, steady-state error, and implementation difficulty. A model was built to describe both system’s kinematics and dynamics, as well as 3 different controllers (PID, PD+, and a hybrid force/position controller) that were designed to allow each joint to perform smooth motions within anatomic ranges. The corresponding simulation was run and assessed via Matlab (version 2020a). In addition to the performance comparison, remarkable characteristics could be identified among controllers. PD+ showed higher response speed than the other controllers (about 4 times), and PID was reinforced as the technique with the easiest implementation due to the smallest matrices. The study also allowed to greater potential of the hybrid controller to interact with its environment, i.e., the robotic device.
Źródło:
Archives of Control Sciences; 2022, 32, 2; 409--427
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnostics of control rod drive. Possibilities to extend its lifetime at NPPs
Diagnostyka napędu pręta sterującego. Możliwości zwiększenia czasu eksploatacji napędów w elektrowniach atomowych
Autorzy:
Druzhinin, I.
Sapozhnikova, K.
Taymanov, R.
Powiązania:
https://bibliotekanauki.pl/articles/329298.pdf
Data publikacji:
2008
Wydawca:
Polska Akademia Nauk. Polskie Towarzystwo Diagnostyki Technicznej PAN
Tematy:
elektromagnetyczny liniowy silnik krokowy
czujnik położenia
pręt sterujący
czas eksploatacji
reaktor jądrowy
linear stepping electromagnetic drive
control rod position sensor
lifetime
nuclear reactor
Opis:
According to specifications, lifetime of a linear stepping electromagnetic drive in WWER-1000 nuclear reactors is limited by the pre-assigned lifetimes of the drive components such as electromagnets, a latch assembly, drive rack, and control rod position sensor. The lifetime of the drive components is from 7 to 20 years. On the basis of diagnostics of these components under real conditions, actual lifetimes of the components at nuclear power plant (NPP) were forecasted. It is shown that in order to extend the lifetime of the drive components up to the reactor lifetime (60 years), it is necessary to replace the sensor of the DPL-type by the new one (of the DPL-KV type) and to decrease the electromagnet temperature. The Measuring and Diagnostic System with the DPL-KV sensor enables diagnosing the sensor, electronic processing unit and drive. Economic effect due to the cumulative technical decisions is estimated to be 7 mln.euro per NPP unit.
Zgodnie z dokumentacją czas eksploatacji elektromagnetycznych silników krokowych prętów sterujących w reaktorach jądrowych WWER-1000 jest ograniczony ustalonymi czasami eksploatacji ich składników (blok przesunięcia, pręt, elektromagnesy, czujnik) - od 7 do 20 lat. Na podstawie wyników diagnostyki tych składników w warunkach realnych została zrobiona prognoza ich rzeczywistej żywotności w elektrowniach atomowych. Wykazano, że w celu wydłużenia czasu eksploatacji składników do czasu życia reaktora (60 lat) trzeba wymienić czujnik DPL na inny, bardziej niezawodny - DPL-KV i znacznie obniżyć temperaturę elektromagnesów. Układ pomiarowo-diagnostyczny wyposażony w czujnik DPL-KV pozwala przeprowadzać diagnostykę czujnika, osprzętu elektronicznego i silnika. Całkowity efekt ekonomiczny wprowadzenia zaproponowanych rozwiązań technicznych jest szacowany na 7 milionów Euro na blok energetyczny.
Źródło:
Diagnostyka; 2008, 3(47); 89-93
1641-6414
2449-5220
Pojawia się w:
Diagnostyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measuring system for parallel moving ships
Autorzy:
Waszkiel, A.
Powiązania:
https://bibliotekanauki.pl/articles/259094.pdf
Data publikacji:
2012
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
vision system
relative ship position determination
safe ship control
computer simulation
Opis:
The paper introduces algorithm for determining the relative positions of two ships manoeuvring as a pair. This algorithm also takes into account determination of angle ă, which is difference between present approaching vessel and guidance vessel course. Relative positioning system is a vision system based on three colours LEDs matrix and rotating CCD camera. There are presented ways of distance calculation based on photogrammetric methods from the known distance between the characteristic points of the real. Several possible cases are taken into account. The considerations have been illustrated on the basis of model of the system. These results confirm the correctness of the operation of the algorithm that is used by the designed measuring system.
Źródło:
Polish Maritime Research; 2012, S 1; 66-72
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sterowanie amortyzacją dobiegu siłownika elektropneumatycznego
Control of end position cushioning in electro-pneumatic drive
Autorzy:
Langwald, P.
Jurczyński, M.
Olszewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/274949.pdf
Data publikacji:
2010
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
pneumatyka
sterowanie
amortyzacja
dobieg tłoka
pneumatics
control
shock absorber
end position cushioning
Opis:
W pracy przedstawiono koncepcję amortyzacji dobiegu siłownika pneumatycznego zrealizowaną na drodze niezależnego napełniania i opróżniania komory czynnej i biernej. Przedstawiono również rozwiązanie problemu modelowania siłownika pneumatycznego opartego na stworzeniu środowiska do symulacji procesów ruchu tłoka przy różnych koncepcjach sterowania.
This paper presents a concept of braking a pneumatic actuator realized by independent filling and emptying of the active and passive chambers. A solution to the problem of modelling a pneumatic actuator was also proposed, based on what, a software environment for simulating piston movement at different concepts of control, was made.
Źródło:
Pomiary Automatyka Robotyka; 2010, 14, 11; 120-122
1427-9126
Pojawia się w:
Pomiary Automatyka Robotyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A multi-model based adaptive reconfiguration control scheme for an electro-hydraulic position servo system
Autorzy:
Zhang, Zhao
Yang, Zhong
Liu, Shuchang
Chen, Shuang
Zhang, Xiaokai
Powiązania:
https://bibliotekanauki.pl/articles/2124780.pdf
Data publikacji:
2022
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
fault tolerant control
electro hydraulic position
servo system
multiple model
adaptive control
reconfiguration control
sterowanie tolerujące uszkodzenia
serwomechanizm
sterowanie adaptacyjne
Opis:
Reliability and safety of an electro-hydraulic position servo system (EHPSS) can be greatly reduced for potential sensor and actuator faults. This paper proposes a novel reconfiguration control (RC) scheme that combines multi-model and adaptive control to compensate for the adverse effects. Such a design includes several fixed models, one adaptive model, and one reinitialized adaptive model. Each of the models has its own independent controller that is based on a complete parametrization of the corresponding fault. A proper switching mechanism is set up to select the most appropriate controller to control the current plant. The system output can track the reference model asymptotically using the proposed method. Simulation results validate robustness and effectiveness of the proposed scheme. The main contribution is a reconfiguration control method that can handle component faults and maintain the acceptable performance of the EHPSS.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2022, 32, 2; 185--196
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł

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