Dynamic behaviour of open-loop systems of intelligent structures

The present work deals to investigate the performance of linear switched reluctance motor designed for a sliding door application. The objective of this paper is to develop an analytical model in order to predict the dynamic behaviour of the studied motor. Firstly, the characteristics of the proposed motor in open loop operation was computed.Secondly, the effect of the load on the response of the motor was investigated. In this context, a two technoque in open loop were adopted to solve the error positioning with load and to damp the oscillation observed in the characteristics of the motor in order to obtain a smooth motion.

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Modelling of a Hybrid Constrained Layer/Piezoceramic Approach to Active Damping

Journal of Vibration and Acoustics ◽

10.1115/1.2889679 ◽

1997 ◽

Vol 119 (1) ◽

pp. 120-130 ◽

Cited By ~ 32

Author(s):

J. A. Rongong ◽

J. R. Wright ◽

R. J. Wynne ◽

G. R. Tomlinson

Keyword(s):

Active Control ◽

Laboratory Experiments ◽

Dynamic Behaviour ◽

Flexural Vibration ◽

Open Loop ◽

Structural Vibration ◽

Constrained Layer Damping ◽

Element Analysis ◽

Cantilevered Beam ◽

And Performance

It has been shown that significant reductions in structural vibration levels can be achieved using a hybrid system involving constrained layer damping and active control with piezoceramics. In this paper, mathematical models based on the Rayleigh Ritz approach, are developed to describe the longitudinal and flexural vibration behaviour of a cantilevered beam when excited using piezoceramic patches bonded to a constrained layer damping treatment. Predictions of static and steady state dynamic behaviour, obtained using the models are validated by comparison with results from finite element analysis and laboratory experiments. The models are then used in open loop and closed loop velocity feedback control simulations to demonstrate the improvements in stability and performance achieved using this method over that achieved using conventional active control.

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Non-Ideal Op-Amp Circuit Analysis

International Journal of Electrical Engineering Education ◽

10.7227/ijeee.47.1.7 ◽

2010 ◽

Vol 47 (1) ◽

pp. 73-85

Author(s):

Wuqiang Yang

Keyword(s):

Input Impedance ◽

Dynamic Behaviour ◽

Open Loop ◽

Loop Gain ◽

Output Impedance ◽

Circuit Performance ◽

First Order ◽

Op Amp ◽

Op Amps ◽

The Ideal

Op-amps are commonly used by instrumentation engineers. In the ideal case, the open-loop gain of an op-amp is regarded as infinite, the input impedance as infinite, and the output impedance as zero. In many cases, however, it is necessary to estimate the performance of an op-amp circuit with consideration of non-ideal parameters, and therefore it is necessary to analyse the non-ideal characteristics of the op-amp circuit. This paper discusses the effect on circuit performance of non-ideal parameters, i.e. finite open-loop gain, finite input impedance and non-zero output impedance of op-amps. A concept ‘loop gain’ is introduced and the dynamic behaviour, i.e. the frequency response, is analysed based on a first-order dynamic model.

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CONTROL OF BODY HEIGHT IN A STICK INSECT WALKING ON A TREADWHEEL

Journal of Experimental Biology ◽

10.1242/jeb.181.1.141 ◽

1993 ◽

Vol 181 (1) ◽

pp. 141-155 ◽

Cited By ~ 1

Author(s):

H. Cruse ◽

J. Schmitz ◽

U. Braun ◽

A. Schweins

Keyword(s):

Control System ◽

Linear Relationship ◽

Closed Loop ◽

Dynamic Behaviour ◽

Dynamic Properties ◽

Body Height ◽

Stick Insect ◽

Open Loop ◽

Carausius Morosus ◽

Height Control

The properties of the system that controls the distance between body and ground was investigated in the stick insect Carausius morosus. The insect walked on a lightweight double treadwheel under open-loop or closed-loop conditions. The open-loop investigations show that the dynamic behaviour of the height-control system in the walking animal can be described in terms of a simple proportional system with negligible dynamic properties, and it is therefore much simpler than the height-control system in the standing animal. Under open-loop conditions, we found no coupling between contralateral or ipsilateral legs. This agrees with the findings on standing animals. The force- height characteristic shows two ranges, in each of which the system exhibits a linear relationship but a different slope. Under closed-loop conditions, the force-height characteristic shows the same two linear ranges, but the slopes are greater than under open-loop conditions. Because the height controller of each leg can be considered to act like a spring, this result means that under closed-loop conditions the controller is stiffer than it is under open-loop conditions.

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Set of open-loop block-diagonalizers of transfer matrices

International Journal of Control ◽

10.1080/00207178908961237 ◽

1989 ◽

Vol 49 (1) ◽

pp. 161-168

Author(s):

A. Bülent Özgü Ler ◽

Vasfi Eldem

Keyword(s):

Open Loop ◽

Transfer Matrices

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On closed-loop equilibrium strategies for mean-field stochastic linear quadratic problems

ESAIM Control Optimisation and Calculus of Variations ◽

10.1051/cocv/2019057 ◽

2020 ◽

Vol 26 ◽

pp. 41

Author(s):

Tianxiao Wang

Keyword(s):

Optimal Control ◽

Closed Loop ◽

Optimal Control Problems ◽

Mean Field ◽

Open Loop ◽

Time Inconsistency ◽

Control Problems ◽

Linear Quadratic ◽

Linear Quadratic Optimal Control ◽

Equilibrium Strategies

This article is concerned with linear quadratic optimal control problems of mean-field stochastic differential equations (MF-SDE) with deterministic coefficients. To treat the time inconsistency of the optimal control problems, linear closed-loop equilibrium strategies are introduced and characterized by variational approach. Our developed methodology drops the delicate convergence procedures in Yong [Trans. Amer. Math. Soc. 369 (2017) 5467–5523]. When the MF-SDE reduces to SDE, our Riccati system coincides with the analogue in Yong [Trans. Amer. Math. Soc. 369 (2017) 5467–5523]. However, these two systems are in general different from each other due to the conditional mean-field terms in the MF-SDE. Eventually, the comparisons with pre-committed optimal strategies, open-loop equilibrium strategies are given in details.

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Investigation of fused silica dynamic behaviour

Journal de Physique IV (Proceedings) ◽

10.1051/jp4:2006134142 ◽

2006 ◽

Vol 134 ◽

pp. 929-934 ◽

Cited By ~ 2

Author(s):

F. Malaise ◽

J.-M. Chevalier ◽

I. Bertron ◽

F. Malka

Keyword(s):

Dynamic Behaviour ◽

Fused Silica

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A MODEL FOR THE FATIGUE SATURATION RANGE OF ALUMINIUM FROM DYNAMIC BEHAVIOUR AND INTERACTIONS OF DISLOCATIONS

Le Journal de Physique Colloques ◽

10.1051/jphyscol:1987820 ◽

1987 ◽

Vol 48 (C8) ◽

pp. C8-155-C8-160

Author(s):

R. FOUGERES ◽

J. CHICOIS ◽

A. HAMEL ◽

A. VINCENT

Keyword(s):

Dynamic Behaviour

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Analysis of the Multi-Channel Epileptiform EEG Using the Markov Chains Formalism

Methods of Information in Medicine ◽

10.1055/s-0038-1635557 ◽

1989 ◽

Vol 28 (03) ◽

pp. 160-167 ◽

Cited By ~ 1

Author(s):

P. Penczek ◽

W. Grochulski

Keyword(s):

Dynamic Behaviour ◽

Joint Probability ◽

Drug Effects ◽

Anticonvulsant Drug ◽

Channel System ◽

Markov Network ◽

Eeg Data ◽

Multi Level ◽

Joint Probability Functions ◽

Dependent State

Abstract:A multi-level scheme of syntactic reduction of the epileptiform EEG data is briefly discussed and the possibilities it opens up in describing the dynamic behaviour of a multi-channel system are indicated. A new algorithm for the inference of a Markov network from finite sets of sample symbol strings is introduced. Formulae for the time-dependent state occupation probabilities, as well as joint probability functions for pairs of channels, are given. An exemplary case of analysis in these terms, taken from an investigation of anticonvulsant drug effects on EEG seizure patterns, is presented.

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