Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "sensor/actuator" wg kryterium: Wszystkie pola


Wyświetlanie 1-14 z 14
Tytuł:
Piezoelectric square based sensor-actuator hybrid in vibration reduction
Autorzy:
Trojanowski, Roman
Wiciak, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/24202001.pdf
Data publikacji:
2022
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
AVC
FEM
plate vibration
sensors
drgania płyty
czujniki
Opis:
This paper presents the results of comparison of vibration reduction levels between standard square based piezo actuators and piezoelectric sensor-actuator hybrids. Modelling was done using FEM method in ANSYS software. Model consisted of a steel plate with piezo elements attached. One of the elements was used as an actuator to excite plate’s vibrations. The other was either a standard homogeneous square based actuator or a sensor actuator hybrid with 2 possible sizes of the sensor part of said hybrid. Harmonic analyses were performed for the 1st, 2nd, 4th and 5th mode shapes with the goal function being the minimalization of displacement vector sum of a number of nodes (there were 3 possible cases). Significant vibration reduction levels were obtained with no significant differences in said levels between standard actuators and sensor-actuator hybrids. Reducing the size of sensor part of sensor-actuator allowed for lower voltages needed to achieve vibration reduction levels.
Źródło:
Vibrations in Physical Systems; 2022, 33, 3; art. no. 2022303
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of the size of the sensor part on sensor-actuator efficiency
Autorzy:
Trojanowski, Roman
Wiciak, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/1839636.pdf
Data publikacji:
2020
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
AVC
FEM
ANSYS
Opis:
This paper presents numerical analyses of the impact of the size of the sensor-actuator part on sensor-actuator efficiency. For that purpose, numerical models of a steel plate clamped on all sides were created with two piezoelectric actuators attached to it. One was used to excite the plate and the second (which could be either a standard actuator or a sensor-actuator, having different shapes and sensor part size) to reduce plates vibrations. Harmonic analyses were performed with the goal function being the minimum of the displacement vector sum of n nodes, where n can have different values depending on the case study.
Źródło:
Journal of Theoretical and Applied Mechanics; 2020, 58, 2; 391-401
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical analyses of the effectiveness of an integrated disc based piezoelectric sensor-actuator
Autorzy:
Trojanowski, Roman
Wiciak, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/128159.pdf
Data publikacji:
2019
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
AVC
FEM
ANSYS
Opis:
This paper deals with numerical analyses of plates vibration reduction effectiveness of an integrated disc based piezoelectric sensor-actuator compared to standard type disc based piezoelectric actuator. For that purpose 400 x 400 x 2 mm plate clamped on all sides was modelled with 2 piezo elements attached to it. One was a standard square based piezoelectric actuator used to excite the plate. The second one is disc based and can be either a standard element or an integrated sensor-actuator and is used for vibration reduction. The harmonic analyses were performed for the 1st, 2nd, 4th and 5th mode. Voltage used for plates excitation was always set to 100 V. The amplitude of voltage applied to the actuator was selected using internal ANSYS optimization procedures. The goal function for this was the minimum of the displacement vector sum of n nodes of the plate, with n having 3 possible values.
Źródło:
Vibrations in Physical Systems; 2019, 30, 1; 1-8
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Optimal vibration control of conical shells with collocated helical sensor/actuator pairs
Optymalne sterowanie drganiami powłok stożkowych za pomocą spiralnego skolokowanego układu czujnika i elementu wykonawczego
Autorzy:
Li, H.
Hu, S. D.
Tzou, H. S.
Chen, Z. B.
Powiązania:
https://bibliotekanauki.pl/articles/280352.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:
smart structure
conical shell
diagonal sensor/actuator
optimal vibration control
Opis:
This paper focuses on the optimal vibration control of clamped-free conical shells using distributed helical piezoelectric sensor/actuator (S/A) pairs. Based on the independent modal space control, the response of conical shell to external excitations is represented by the summation of all participating natural modes and their respective modal participation factors, and each mode can be controlled independently. The modal equation is transformed into the linear state space form. The linear quadratic (LQ) controllers are designed for each independent mode. The optimal gain matrix is related to the ratio G∗ between the control voltage and sensing signal by the modal control force per unit voltage B2 and the sensing signal per unit displacement C1. Because B2 and C1 change with locations of the S/A pair, the optimal control effects, modal control forces and corresponding optimal control voltages are evaluated using two S/A pairs at different locations. The results indicate that the optimal control method is effective in vibration control of the shell. The optimal control effect also depends on the location of the S/A pair and modal shapes as well as the modal control force and input voltage.
W pracy skoncentrowano się na problemie optymalnego sterowania drganiami jednostronnie zamocowanych powłok stożkowych za pomocą spiralnie ułożonego układu piezoelektrycznego czujnika skolokowanego z elementem wykonawczym (S/A). W oparciu o wyniki płynące z rozwiązania przestrzennego zagadnienia sterowania modalnego, dynamiczną odpowiedź powłoki na wymuszenie zewnętrzne wyrażono sumą postaci własnych, jednocześnie stwierdzając, że można niezależnie ingerować w poszczególne postaci własne układu. Równanie modalne przetransformowano do liniowej formuły stanu. Zaprojektowano sterowniki liniowo-kwadratowe (LQ) niezależnie dla każdej postaci własnej. Optymalną macierz współczynników wzmocnienia skorelowano z transmitancją G∗ pomiędzy napięciem sterowania i sygnału czujnika poprzez jednostkową siłę sterującą odniesioną do napięcia B2 oraz sygnału czujnika w stosunku do przemieszczenia C1. Ponieważ B2 i C1 zmieniają się wraz ze zmianą położenia skolokowanych par S/A, przeprowadzono ewaluację modalnych sił sterujących i odpowiadających im napięć dla różnych położeń układu sterowania. Wyniki badań potwierdziły efektywność optymalnego sterowania drganiami powłoki stożkowej. Zauważono także wrażliwość uzyskanego stopnia sterowania na położenie pary czujnika i elementu wykonawczego oraz wartości modalnej siły sterującej, jak i napięcia.
Źródło:
Journal of Theoretical and Applied Mechanics; 2012, 50, 3; 769-784
1429-2955
Pojawia się w:
Journal of Theoretical and Applied Mechanics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Deployment of an Agent-based SANET Architecture for Healthcare Services
Autorzy:
Chiu, C.
Chaczko, Z.
Powiązania:
https://bibliotekanauki.pl/articles/226290.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
BDI Agent Framework
Extended Kohonen Maps (EKM)
healthcare infrastructures
Rao-Blackwell filtering
Sensor Actuator Networks (SANETs)
Opis:
This paper describes the adaptation of a computational technique utilizing Extended Kohonen Maps (EKMs) and Rao-Blackwell-Kolmogorov (R-B) Filtering mechanisms for the administration of Sensor-Actuator networks (SANETs). Inspired by the BDI (Belief-Desire-Intention) Agent model from Rao and Georgeff, EKMs perform the quantitative analysis of an algorithmic artificial neural network process by using an indirect-mapping EKM to self-organize, while the Rao-Blackwell filtering mechanism reduces the external noise and interference in the problem set introduced through the self-organization process. Initial results demonstrate that a combinatorial approach to optimization with EKMs and Rao-Blackwell filtering provides an improvement in event trajectory approximation in comparison to standalone cooperative EKM processes to allow responsive event detection and optimization in patient healthcare.
Źródło:
International Journal of Electronics and Telecommunications; 2011, 57, 3; 309-315
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of nonlinearities in sensor and actuator on the operation of the rotational speed control system of a roadheader cutting head
Autorzy:
Joostberens, Jarosław
Heyduk, Adam
Powiązania:
https://bibliotekanauki.pl/articles/27324344.pdf
Data publikacji:
2022
Wydawca:
Instytut Techniki Górniczej KOMAG
Tematy:
roadheader
speed control system
rotational encoder
power electronic converter
stability margin
Opis:
The paper presents a discussion on the selected nonlinearities existing in sensor and actuator subsystems of the roadheader cutting head speed control system. There have been concerned the most significant nonlinearities - rotational speed encoder and frequency rate limiter in the input of the power electronic converter. These nonlinearities significantly reduce the stability margin of the control system and therefore should be minimized. They have also an influence on allowable speed controller settings range. Reduction in the controller settings can result in a decrease in the quality of operation of the entire control system. The measurement time of the encoder-based speed sensing should be as short as possible, or continuous measurement (like tachogenerator) should be used. The frequency converter should be overmatched to ensure current overload capability – allowing an increase in the permissible rate of output voltage frequency change.
Źródło:
Mining Machines; 2022, 40, 4; 249--257
2719-3306
Pojawia się w:
Mining Machines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Actuator/Sensor Integration in Magnetic Bearings
Synergia elementu pomiarowego z wykonawczym w łożyskach magnetycznych
Autorzy:
Gosiewski, Z.
Szaro, M.
Powiązania:
https://bibliotekanauki.pl/articles/153339.pdf
Data publikacji:
2003
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
synergia
element pomiarowy
element wykonawczy
łożyska magnetyczne
diplecement sensor
magnetic bearing
synergy
reliability
Opis:
In this paper we consider sensor and actuator integration in a magnetic bearing. The mathematical analysis of physical effects in a inductive sensor circuit is carried out. this model is implemented in the software environment of matlab. There are shown simulation characteristics of measurement circuit of sensor. We present experimental static and dynamics characteristics, particularly static linear characteristics and step responses obtained on a prototype lab stand. We indicate the future directions of research of inductive sensor in suggested system.
W artykule omówiono możliwość wykorzystania cewki elektromagnesu łożysk magnetycznych jako elementu pomiarowego. Przedstawiona została matematyczna analiza zjawisk fizycznych zachodzących w obwodzie czujnika indukcyjnościowego. Model ten został zaimplementowany w środowisku Matlab, a przykładowe charakterystyki obwodu pomiarowego czujnika przedstawione są w artykule. Opisane zostały również charakterystyki statyczne i dynamiczne układu pomiarowego uzyskane na stanowisku laboratoryjnym.
Źródło:
Pomiary Automatyka Kontrola; 2003, R. 49, nr 11, 11; 15-17
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An H∞ sliding mode observer for Takagi–Sugeno nonlinear systems with simultaneous actuator and sensor faults
Autorzy:
Ben Brahim, A.
Dhahri, S.
Ben Hmida, F.
Sellami, A.
Powiązania:
https://bibliotekanauki.pl/articles/330626.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
fault reconstruction
fault estimation
simultaneous fault
H∞ sliding mode observer
uncertain Takagi Sugeno system
LMI optimization
Opis:
This paper considers the problem of robust reconstruction of simultaneous actuator and sensor faults for a class of uncertain Takagi–Sugeno nonlinear systems with unmeasurable premise variables. The proposed fault reconstruction and estimation design method with H∞ performance is used to reconstruct both actuator and sensor faults when the latter are transformed into pseudo-actuator faults by introducing a simple filter. The main contribution is to develop a sliding mode observer (SMO) with two discontinuous terms to solve the problem of simultaneous faults. Sufficient stability conditions in terms linear matrix inequalities are achieved to guarantee the stability of the state estimation error. The observer gains are obtained by solving a convex multiobjective optimization problem. Simulation examples are given to illustrate the performance of the proposed observer.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2015, 25, 3; 547-559
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pitch and yaw motion control of 2 DoF helicopter subjected to faults using sliding-mode control
Autorzy:
Raghappriya, M.
Kanthalakshmi, S.
Powiązania:
https://bibliotekanauki.pl/articles/2134893.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fault tolerant control
sliding mode control
reaching law
super-twisting
sensor
actuator faults
component faults
Opis:
This paper presents a fault-tolerant control scheme for a 2 DOF helicopter. The 2 DOF helicopter is a higher-order multi-input multi-output system featuring non-linearity, cross-coupling, and unstable behaviour. The impact of sensor, actuator, and component faults on such highly complex systems is enormous. This work employs sliding mode control, which is based on reaching and super-twisting laws, to handle the problem of fault control. Simulation tests are carried out to show the effectiveness of the algorithms. Various performance metrics are analyzed and the results show SMC based on super-twisting law provides better control with less chattering. The stability of the closed-loop system is mathematically assured, in the presence of faults, which is a key contribution of this research.
Źródło:
Archives of Control Sciences; 2022, 32, 2; 359--381
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Suppression of vibration with optimal actuators and sensors placement
Autorzy:
Starek, L.
Starek, D.
Solek, P.
Starekova, A.
Powiązania:
https://bibliotekanauki.pl/articles/229841.pdf
Data publikacji:
2010
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
optimal location
vibration suppression
actuator
sensor
Opis:
It is proposed to place the actuators to maximize the mean value of energy transmitted from or dissipated by the actuators, while the sensor location should maximize the mean square value of system output, which also maximizes the signal-to-noise ratio. By using explicit expressions for controllability and observability grammians as well as modal energies, it is shown that the approaches based on the system responses to transient and persistent disturbances are closely related, and are equivalent for structures which damping is small and the natural frequencies of which are well spaced. The method of actuator and sensor optimal location via grammians was proposed and compared it with results given by the method of matrix norms.
Źródło:
Archives of Control Sciences; 2010, 20, 1; 99-120
1230-2384
Pojawia się w:
Archives of Control Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
H/H∞ fault detection observer design for a polytopic LPV system using the relative degree
Autorzy:
Zhou, M.
Rodrigues, M.
Shen, Y.
Theilliol, D.
Powiązania:
https://bibliotekanauki.pl/articles/330200.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
fault detection observer
polytopic LPV system
relative degree of output
actuator fault detection
sensor fault detection
detekcja uszkodzeń
urządzenie wykonawcze
czujnik detekcji
Opis:
This paper proposes an H/H fault detection observer method by using generalized output for a class of polytopic linear parameter-varying (LPV) systems. As the main contribution, with the aid of the relative degree of output, a new output vector is generated by gathering the original output and its time derivative, and it is feasible to consider H actuator fault sensitivity in the entire frequency for the new system. In order to improve actuator and sensor fault sensitivity as well as guarantee robustness against disturbances, simultaneously, an H/H fault detection observer is designed for the new LPV polytopic system. Besides, the design conditions of the proposed observer are transformed into an optimization problem by solving a set of linear matrix inequalities (LMIs). Numerical simulations are provided to illustrate the effectiveness of the proposed method.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2018, 28, 1; 83-95
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hybrid vehicle diagnostics
Autorzy:
Prajwowski, K.
Osipowicz, T.
Powiązania:
https://bibliotekanauki.pl/articles/247375.pdf
Data publikacji:
2017
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
hybrid vehicle
diagnostics
sensor
actuator technology
oscilloscope signal characteristics
pojazd hybrydowy
diagnostyka
czujnik
technologia napędu
sygnał oscyloskopu
charakterystyka
Opis:
The history of hybrid vehicles has started between the 19th and the 20th century because then the first project of a hybrid vehicle was constructed. The first man who manufactured a front hub mounted electric propulsion connected with a generator powered by a spark ignition engine was Ferdinand Porsche. This vehicle was called the Lohner- -Porsche Electromobile. The first mass-produced hybrid vehicle was the first generation Toyota Prius. The model premiere was in 1996 and the production started one year later. The vehicle was equipped with a 1.5 dcm 58 hp spark ignition engine and with the added electric propulsion. It generated 40 mechanical hp. Since 2000, a 72 hp spark ignition engine and a 44 hp electric generator were mounted. Fuel consumption of this model was 5 litres per 100 km. In the early 2000s, 95% hybrid vehicles were the Toyota Prius. The biggest competitor to the Toyota Prius was the Honda Insight. Lexus and Mercedes started manufacturing hybrid vehicles few years later. The most popular car brands that sell hybrid vehicles are Toyota and Lexus from Toyota Motor Corporation. This article describes an example of diagnostic possibilities for the hybrid vehicle system. The construction of vehicle models that use two propulsion systems (spark ignition engine and electric generator) results in the development and increase in control system devices. The measurements were made using various diagnostic devices, e.g. a diagnostic scanner, mustimeter, megohm-meter and oscilloscope. The reading of fault codes is not enough so it is necessary to use a mustimeter or a megohm-meter to examine the signal characteristics, which is presented in this article.
Źródło:
Journal of KONES; 2017, 24, 1; 309-315
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Diagnostics of modern diesel engines on the example of Fiat 1.3 JTD MultiJet engine
Autorzy:
Prajwowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/245043.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
engine diagnostics
sensor system
actuator system
oscilloscope signal waveforms
diagnostyka silnika
system czujników
system siłownika
Opis:
Initially, electronic components replaced the mechanical ones to make various systems more reliable. Mechanical control systems, due to the wear of movable parts and imprecise adjustment, were affected by large errors, which are not shown by electronic circuits operating according to constant set-points. Then, a sharp increase in electronisation was associated with the tightening of exhaust gas emission regulations. Progress in some cases is forced by environmental protection, in other ones by market competition. Modern motor vehicles, slow moving vehicles, military vehicles, etc., are the technical systems being constructed using the latest developments in many fields of science, first of all in mechanics and machine engineering, electrical engineering, electronics, information technology, and chemistry. The rapid development of electronics has led to an increase in the number of electronic components in motor vehicles in all systems, starting with an engine, which has been modified first, to comfort and infotainment systems. The paper presents example measurements of sensors and actuators of an engine with Common Rail fuel supply system on the example of Fiat 1.3 JTD MultiJet engine. The measurements were made using various diagnostic instruments, such as a diagnostic tester, a multimeter or an oscilloscope. Sometimes, the reading of error codes with a diagnostic tester itself is not enough and it is necessary to check the signal waveform with an oscilloscope, which has been presented in this paper.
Źródło:
Journal of KONES; 2016, 23, 3; 403-409
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A concept of electro-pneumatic programmable manipulator
Koncepcja elektropneumatycznego manipulatora programowalnego
Autorzy:
Kaszycki, L.
Powiązania:
https://bibliotekanauki.pl/articles/360765.pdf
Data publikacji:
2011
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
sterownik logiczny
robotyka
siłownik beztłoczyskowy
pozycjonowanie liniowe
chwytak
laserowy czujnik przemieszczenia
logical controller
robotics
rodless actuator
linear positioning
gripper
laser displacement sensor
Opis:
The paper presents a concept of use the logical controller and typical pneumatic elements to construction of programmable manipulator. The construction, principle of action and properties of device were described. The paper contains also detailed functional schemes of system, as well as discussion of performed manipulator tests. Finally, the application area of described device was included.
W artykule przedstawiono koncepcję wykorzystania sterownika logicznego oraz typowych elementów pneumatyki do budowy programowalnego manipulatora. Opisano budowę, zasady działania oraz właściwości urządzenia. Dołączono szczegółowe schematy funkcjonalne zbudowanego układu. Omówiono przeprowadzone testy manipulatora. Wskazano obszar zastosowań opisanego urządzenia.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2011, 28 (100) z. 1; 34-37
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-14 z 14

    Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies