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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
Tytuł:
An SFDI observer-based scheme for a general aviation aircraft
Autorzy:
Ariola, M.
Mattei, M.
Notaro, I.
Corraro, F.
Sollazzo, A.
Powiązania:
https://bibliotekanauki.pl/articles/330264.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
model based FDI
sensor FDI
extended Kalman filtering
analytical redundancy
flight control
filtracja Kalmana
redundancja analityczna
sterowanie lotem
Opis:
The problem of detecting and isolating sensor faults (sensor fault detection and isolation—SFDI) on a general aviation aircraft, in the presence of external disturbances, is considered. The proposed approach consists of an extended Kalman observer applied to an augmented aircraft plant, where some integrators are added to the output variables subject to faults. The output of the integrators should be ideally zero in the absence of model uncertainties, external disturbances and sensor faults. A threshold-based decision making system is adopted where the residuals are weighted with gains coming from the solution to an optimization problem. The proposed nonlinear observer was tested both numerically on a large database of simulations in the presence of disturbances and model uncertainties and on input-output data recorded during real flights. In this case, the possibility of successfully applying the proposed technique to detect and isolate faults on inertial and air data sensors, modelled as step or ramp signals artificially added to the real measurements, is shown.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2015, 25, 1; 149-158
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calculation of magnetic systems of speed and gear teeth integrity sensors
К raschetu magnitnykh sistem datchikov chastoty vrashhenija i celosthosti zubbev shesterhi
Autorzy:
Bezkorovaynyy, V.
Boureima, S.
Serhienko, D.
Powiązania:
https://bibliotekanauki.pl/articles/792284.pdf
Data publikacji:
2012
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
magnetic system
speed sensor
optimization
speed
gear tooth
integrity
mathematical model
optimal parameter
Opis:
Magnetic system of speed and integrity of teeth sensors, which is a U-shaped magnetic core and magnetic circuit of circular section is optimized. A mathematical model of the dependence of the magnetic flux in the core induced by magnetized gear is presented. The results of numerical experiment are given. The conclusions and recommendations for optimizing the parameters of the SS magnetic systems are made.
Оптимизируется магнитная система датчиков частоты вращения и целостности зубьев, представляющая собой П-образный магнитопровод и магнитопровод круглого сечения. Представлена математическая модель зависимости магнитного потока в сердечнике, индуцированного намагниченным зубчатым колесом. Приведены результаты численного эксперимента. Сделаны выводы и даны рекомендации по оптимизации параметров магнитных систем ДЧВ.
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2012, 12, 4
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
N-Body Potential Interaction as a Cost Function in the Elastic Model for SANET Cloud Computing
Autorzy:
Chaczko, Z.
Resconi, G.
Chiu, C.
Aslanzadeh, S.
Powiązania:
https://bibliotekanauki.pl/articles/227216.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
elastic network model
cloud computing
Sensor-Actor networks
matrix calculus
N-Body interactions
cost functions
Opis:
Given a connection graph of entities that send and receive a flow of data controlled by effort and given the parameters, the metric tensor is computed that is in the elastic relational flow to effort. The metric tensor can be represented by the Hessian of the interaction potential. Now the interaction potential or cost function can be among two entities: 3 entities or 'N' entities and can be separated into two main parts. The first part is the repulsion potential the entities move further from the others to obtain minimum cost, the second part is the attraction potential for which the entities move near to others to obtain the minimum cost. For Pauli's model [1], the attraction potential is a functional set of parameters given from the environment (all the elements that have an influence in the module can be the attraction of one entity to another). Now the cost function can be created in a space of macro-variables or macro-states that is less of all possible variables. Any macro-variable collect a set of micro-variables or microstates. Now from the hessian of the macro-variables, the Hessian is computed of the micro-variables in the singular points as stable or unstable only by matrix calculus without any analytical computation - possible when the macro-states are distant among entities. Trivially, the same method can be obtained by a general definition of the macro-variable or macro-states and micro-states or variables. As cloud computing for Sensor-Actor Networks (SANETS) is based on the bonding concept for complex interrelated systems; the bond valence or couple corresponds to the minimum of the interaction potential V and in the SANET cloud as the minimum cost.
Źródło:
International Journal of Electronics and Telecommunications; 2012, 58, 1; 63-70
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Sensor Actor Network Modeling utilizing the Holonic Architectural Framework
Autorzy:
Chiu, C.
Chaczko, Z.
Moses, P.
Powiązania:
https://bibliotekanauki.pl/articles/226170.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Extended Kohonen Maps (EKM)
Sensor Actor Networks (SANET)
Wireless Sensor Networks (WSN)
SANET Middleware
POE Classification Model
holonic architecture
Opis:
This paper discusses the results of utilizing advanced EKM modeling techniques to manage Sensor-Actor networks (SANETs) based upon the Holonic Architectural Framework. EKMs allow a quantitative analysis of an algorithmic artificial neural network process by using an indirect-mapping EKM to self-organize from a given input space to administer SANET routing and clustering functions with a control parameter space. Results demonstrate that in comparison to linear approximation techniques, indirect mapping with EKMs provide fluid control and feedback mechanisms by operating in a continuous sensory control space – thus enabling interactive detection and optimization of events in real-time environments.
Źródło:
International Journal of Electronics and Telecommunications; 2010, 56, 1; 49-54
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of the mathematical model of fuel equipment and justification for diagnosing diesel engines by injector needle displacement
Autorzy:
Danilov, Igor
Marusin, Aleksander
Mikhlik, Mikhail
Uspensky, Ivan
Powiązania:
https://bibliotekanauki.pl/articles/1841226.pdf
Data publikacji:
2020
Wydawca:
Politechnika Śląska. Wydawnictwo Politechniki Śląskiej
Tematy:
diagnostics
diesel fuel equipment
injector needle displacement
mathematical model
optical sensor
diagnostyka
urządzenia na olej napędowy
przemieszczenie igły wtryskiwacza
model matematyczny
czujnik optyczny
Opis:
This article discusses the proposed method for diagnosing diesel fuel equipment. An analysis of available methods for diagnosing fuel equipment has been carried out. The authors describe their method for diagnosing plunger pairs of a highpressure fuel pump according to the parameter of displacement of the injector needle. The design of the diagnostic device for measuring the movement of the injector needle has been developed and patented. The dependence of the maximum displacement of the injector needle on the increase, due to wear, of the radial clearance of the plunger bushing at the minimum steady state of idling of the engine has been determined. The technique of diagnosing the technical condition of plunger pairs of a high-pressure fuel pump by injector needle displacement is considered in detail.
Źródło:
Transport Problems; 2020, 15, 1; 93-104
1896-0596
2300-861X
Pojawia się w:
Transport Problems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effective sensor placement based on a VIKOR method considering common cause failure in the presence of epistemic uncertainty
Autorzy:
Duan, Rong-Xing
He, Jie-Jun
Feng, Tao
Huang, Shu-Juan
Chen, Li
Powiązania:
https://bibliotekanauki.pl/articles/1841697.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:
dynamic fault tree
epistemic uncertainty
sensor placement
reliability criterion
diagnostic sensor model
Opis:
Owing to expensive cost and restricted structure, limited sensors are allowed to install in modern systems to monitor the working state, which can improve their availability. Therefore, an effective sensor placement method is presented based on a VIKOR algorithm considering common cause failure (CCF) under epistemic uncertainty in this paper. Specifically, a dynamic fault tree (DFT) is developed to build a fault model to simulate dynamic fault behaviors and some reliability indices are calculated using a dynamic evidence network (DEN). Furthermore, a VIKOR method is proposed to choose the possible sensor locations based on these indices. Besides, a sensor model is introduced by using a priority AND gate (PAND) to describe the failure sequence between a sensor and a component. All placement schemes can be enumerated when the number of sensors is given, and the largest system reliability is the best alternative among the placement schemes. Finally, a case study shows that CCF has some influence on sensor placement and cannot be neglected in the reliabilitybased sensor placement.
Źródło:
Eksploatacja i Niezawodność; 2021, 23, 2; 253-262
1507-2711
Pojawia się w:
Eksploatacja i Niezawodność
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Presenting a technique for registering images and range data using a topological representation of a path within an environment
Autorzy:
Ferreira, F.
Davim, L.
Rocha, R.
Dias, J.
Santos, V.
Powiązania:
https://bibliotekanauki.pl/articles/385035.pdf
Data publikacji:
2007
Wydawca:
Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów
Tematy:
sensor feature integration
binary data
Bernoulli mixture model
dimensionality reduction
robot localisation
change detection
Opis:
This article presents a novel method to the utilize topological representation of a path, thatpath that is created from sequences of images from digital cameras and sensor data from range sensors. A topological representation of the environment is created by leading the robot around the environment during a familiarisation phaseLeading the robot around the environment during a familiarisation phase creates a topological representation of the environment. While moving down the same path, the robot is able to localise itself within the topological representation that is has been previously created. The principal contribution to the state of the art is that, by using a topological representation of the environment, individual 3D data sets acquired from a set of range sensors need not be registered in a single, [Global] Coordinate Reference System. Instead, 3D point clouds for small sections of the environment are indexed to a sequence of multi-sensor views, of images and range data. Such a registration procedure can be useful in the construction of 3D representations of large environments and in the detection of changes that might occur within these environments.
Źródło:
Journal of Automation Mobile Robotics and Intelligent Systems; 2007, 1, 3; 47-56
1897-8649
2080-2145
Pojawia się w:
Journal of Automation Mobile Robotics and Intelligent Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Właściwości Inteligentnych Mobilnych Czujników Ruchu (IMCR) – zastosowanie w medycynie i sporcie
Characteristics of Intelligence Motion Sensors IMCT – application in medicine and sport
Autorzy:
Frączkowski, K.
Sikora, K.
Pyszczek, T.
Powiązania:
https://bibliotekanauki.pl/articles/261115.pdf
Data publikacji:
2012
Wydawca:
Politechnika Wrocławska. Wydział Podstawowych Problemów Techniki. Katedra Inżynierii Biomedycznej
Tematy:
czujnik ruchu
model trójwymiarowy
wizualizacia
kąty Eulera
detektor Harissa
motion sensor
three-dimensional model
visualisation
Euler angles
Harris detector
Opis:
W pracy przedstawiono wyniki badań dotyczących właściwości Inteligentnych Mobilnych Czujników Ruchu (IMCR), ich zastosowania w rehabilitacji oraz monitorowaniu sylwetki, w odniesieniu do odwzorowania rzeczywistego ruchu człowieka. Dane rejestrowano za pomocą czujników weryfikujących poprawność danych przesyłanych z IMCR, które umieszczano na wybranych obszarach ciała. Dane te są podstawą do budowy trójwymiarowego modelu osoby badanej. Ideą badań jest opracowanie metod wizualizacji odwzorowujących ruch człowieka. Możliwości techniczne i funkcjonalność systemu mogą znaleźć zastosowanie m.in. w medycynie i sporcie.
The paper presents the results of examinations concerning the properties and possibilities of application of the Mobile Intelligence Motion Sensor (IMCR) in the rehabilitation and monitoring of the human posture. The verification of the human motion was made in relation to the real human gesticulations. The present study is based on data collected from cameras that are used to verify the information submitted by means of IMCR. Sensors were placed on the selected regions of the human body. These data are helpful in the elaboration of three-dimensional model for visualization of human motion. The technical capabilities and functionality of the system may find application in medicine and sport.
Źródło:
Acta Bio-Optica et Informatica Medica. Inżynieria Biomedyczna; 2012, 18, 4; 255-259
1234-5563
Pojawia się w:
Acta Bio-Optica et Informatica Medica. Inżynieria Biomedyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Cognitive network model dedicated to transport system telematics
Autorzy:
Gajewska, M.
Powiązania:
https://bibliotekanauki.pl/articles/393207.pdf
Data publikacji:
2014
Wydawca:
Polskie Stowarzyszenie Telematyki Transportu
Tematy:
cognitive green radio
cognitive network model
sensor
telematics
czujnik
telematyka
Opis:
The paper defines the concept of cognitive radio in the context of transport systems, with particular emphasis on modern ecological concept of “green cognitive radio”. In addition, in the paper a modified cognitive network model dedicated to transport system telematics is proposed and presented. Algorithms to support the functioning of the cognitive radio are discussed. Sensors necessary to use the network to support cognitive functioning of transport system telematics are defined. The use of cognitive networks in transport is proposed.
Źródło:
Archives of Transport System Telematics; 2014, 7, 2; 34-39
1899-8208
Pojawia się w:
Archives of Transport System Telematics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Virtual test bed for maritime safety assessment
Autorzy:
Hahn, A.
Gollücke, V.
Buschmann, C.
Schweigert, S.
Powiązania:
https://bibliotekanauki.pl/articles/135126.pdf
Data publikacji:
2015
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
virtual test bed
co-simulation
e-Navigation
maritime traffic simulation
safety assessment
sensor simulation
hardware in the loop
software in the loop
model in the loop
Opis:
“Safe voyage from berth to berth”: This is the goal of all e-Navigation strains driven by new technologies, new infrastructures, and new organizational structures on bridge, on shore, as well as in the cloud. To facilitate these efforts suitable engineering and safety/risk assessment methods are required. Understanding maritime transportation as a sociotechnical system allows the usage of system-engineering methods. Simulation-based test beds for verification and validation (V +V) of e-Navigation technologies are important methods to obtain functional safety and reliability. The modeling and simulation toolset HAGGIS is a cosimulation system for the evaluation of e-Navigation concepts and systems. It provides a maritime traffic simulator and a physical world (n-body) simulator and services for finding rare events of failures. HAGGIS is accompanied by the physical test bed LABSKAUS, which implements a reference port and waterways. This paper describes an integrated and seamless approach for developing new e-Navigation technologies starting with virtual simulation-based safety assessment and ending in physical real-world demonstrations. It gives an overview of the actual test bed and introduces requirements, concepts and elements of HAGGIS and LABSKAUS, which are joined in the e-Maritime Integrated Reference Platform (eMIR) test bed.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2015, 44 (116); 116-122
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model-based techniques for virtual sensing of longitudinal flight parameters
Autorzy:
Hardier, G.
Seren, C.
Ezerzere, P.
Powiązania:
https://bibliotekanauki.pl/articles/330954.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
model based estimation
fault detection
virtual sensor
Kalman filtering
surrogate modelling
estymacja modelu
detekcja uszkodzeń
sensor wirtualny
filtracja Kalmana
Opis:
Introduction of fly-by-wire and increasing levels of automation significantly improve the safety of civil aircraft, and result in advanced capabilities for detecting, protecting and optimizing A/C guidance and control. However, this higher complexity requires the availability of some key flight parameters to be extended. Hence, the monitoring and consolidation of those signals is a significant issue, usually achieved via many functionally redundant sensors to extend the way those parameters are measured. This solution penalizes the overall system performance in terms of weight, maintenance, and so on. Other alternatives rely on signal processing or model-based techniques that make a global use of all or part of the sensor data available, supplemented by a model-based simulation of the flight mechanics. That processing achieves real-time estimates of the critical parameters and yields dissimilar signals. Filtered and consolidated information is delivered in unfaulty conditions by estimating an extended state vector, including wind components, and can replace failed signals in degraded conditions. Accordingly, this paper describes two model-based approaches allowing the longitudinal flight parameters of a civil A/C to be estimated on-line. Results are displayed to evaluate the performances in different simulated and real flight conditions, including realistic external disturbances and modeling errors.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2015, 25, 1; 23-38
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wireless Sensor Node Localization based on LNSM and Hybrid TLBO : Unilateral technique for Outdoor Location
Autorzy:
Kaundal, V.
Sharma, P.
Prateek, M.
Powiązania:
https://bibliotekanauki.pl/articles/226010.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
log normal shadowing model (LNSM)
teacher learning based optimization (TLBO)
trilateration
unilateral
RSSI
ZigBee
wireless sensor network
Opis:
The paper aims at localization of the anchor node (fixed node) by pursuit nodes (movable node) in outdoor location. Two methods are studied for node localization. The first method is based on LNSM (Log Normal Shadowing Model) technique to localize the anchor node and the second method is based on Hybrid TLBO (Teacher Learning Based Optimization Algorithm) - Unilateral technique. In the first approach the ZigBee protocol has been used to localize the node, which uses RSSI (Received Signal Strength Indicator) values in dBm. LNSM technique is implemented in the self-designed hardware node and localization is studied for Outdoor location. The statistical analysis using RMSE (root mean square error) for outdoor location is done and distance error found to be 35 mtrs. The same outdoor location has been used and statistical analysis is done for localization of nodes using Hybrid TLBO-Unilateral technique. The Hybrid-TLBO Unilateral technique significantly localizes anchor node with distance error of 0.7 mtrs. The RSSI values obtained are normally distributed and standard deviation in RSSI value is observed as 1.01 for outdoor location. The node becomes 100% discoverable after using hybrid TLBO- Unilateral technique.
Źródło:
International Journal of Electronics and Telecommunications; 2017, 63, 4; 389-397
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model-based analysis of sensor faults in SI engine
Autorzy:
Komorska, I.
Wołczyński, Z.
Borczuch, A.
Powiązania:
https://bibliotekanauki.pl/articles/133182.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Naukowe Silników Spalinowych
Tematy:
spark ignition engine
air intake system
model-based diagnostics
engine sensor faults
residuals
silnik o zapłonie iskrowym
układ dolotowy
diagnostyka na podstawie modelu
błędy czujników silnika
Opis:
The article focuses on the fault not diagnosed by the OBD system. Apart from mechanical damages sensor faults are a serious group. Although the sensor values are constantly monitored, some errors are not detected. The article presents a diagnostic model of the air intake system of SI engine, which generates the control and work parameters of the engine for fault-free state. The parameters obtained from the reference model can be compared with the parameters measured for the engine in any operating condition. Based on the model the impact of sensor faults for other parameters was analyzed. Some errors can be masked by the adaptive control system of the engine, which changes the parameters of the engine control. Simulation tests were verified on the test bench.
Źródło:
Combustion Engines; 2017, 56, 2; 146-151
2300-9896
2658-1442
Pojawia się w:
Combustion Engines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Minimalizacyjna metoda kompensacji przy zastosowaniu przetworników dynamicznych
Minimization method of compensation for dynamic sensors
Autorzy:
Krasodomski, M.
Powiązania:
https://bibliotekanauki.pl/articles/152263.pdf
Data publikacji:
2007
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
przetwarzanie sygnałów
kompensacja
model przetwornika
signal processing
compensation
sensor model
Opis:
W artykule przeprowadzono analizę matematyczną równoległej struktury kompensacyjnej zbudowanej z przetworników opartych na modelu Wienera-Hammersteina. Modele te uwzględniają powstawanie błędów addytywnych i multiplikatywnych. Rozważono wpływ wrażliwości przetworników na jakość przetwarzania sygnałów przez strukturę. Omówiono podejscie klasyczne do problemu kompensacji i zaproponowano dwa niekonwencjonalne podejścia. Wyniki analizy zweryfikowano symulacyjnie wykorzystując przetworniki dynamiczne. Uzyskano zadowalające rezultaty.
Article focuses on problem of signal processing applying parallel compensation structure. Models of sensors are Wiener-Hammerstein models, additionally taking, mechanism of additive and multiplicative errors arising, into consideration. Influence of sensors sensitivities on signal processing quality is discussed. Classic approach to compensation is presented and two unconventional methods are proposed. Mathematical analysis of problem is verified with simulations. Two types of dynamic sensors are applied in compensation structure. Results turn out to be satisfying.
Źródło:
Pomiary Automatyka Kontrola; 2007, R. 53, nr 9 bis, 9 bis; 228-231
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 26

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