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Novel delay-dependent stability analysis of Takagi-Sugeno fuzzy uncertain neural networks with time varying delays 被引量:1
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作者 M. Syed Ali 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第7期49-60,共12页
This paper presents the stability analysis for a class of neural networks with time varying delays that are represented by the Takagi^ugeno IT-S) model. The main results given here focus on the stability criteria usi... This paper presents the stability analysis for a class of neural networks with time varying delays that are represented by the Takagi^ugeno IT-S) model. The main results given here focus on the stability criteria using a new Lyapunov functional. New relaxed conditions and new linear matrix inequality-based designs are proposed that outperform the previous results found in the literature. Numerical examples are provided to show that the achieved conditions are less conservative than the existing ones in the literature. 展开更多
关键词 neutral neural networks linear matrix inequality Lyapunov stability time varying delays
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Delay dependent stability criteria for recurrent neural networks with time varying delays 被引量:1
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作者 Zhanshan WANG Huaguang ZHANG 《控制理论与应用(英文版)》 EI 2009年第1期9-13,共5页
This paper aims to present some delay-dependent global asymptotic stability criteria for recurrent neural networks with time varying delays. The obtained results have no restriction on the magnitude of derivative of t... This paper aims to present some delay-dependent global asymptotic stability criteria for recurrent neural networks with time varying delays. The obtained results have no restriction on the magnitude of derivative of time varying delay, and can be easily checked due to the form of linear matrix inequality. By comparison with some previous results, the obtained results are less conservative. A numerical example is utilized to demonstrate the effectiveness of the obtained results. 展开更多
关键词 Recurrent neural networks STABILITY time varying delay Linear matrix inequality
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Stabilizing controller design for nonlinear fractional order systems with time varying delays
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作者 AZIZI Abdollah FOROUZANFAR Mehdi 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2021年第3期681-689,共9页
To deal with stabilizing of nonlinear affine fractional order systems subject to time varying delays,two methods for finding an appropriate pseudo state feedback controller are discussed.In the first method,using the ... To deal with stabilizing of nonlinear affine fractional order systems subject to time varying delays,two methods for finding an appropriate pseudo state feedback controller are discussed.In the first method,using the Mittag-Lefler function,Laplace transform and Gronwall inequality,a linear stabilizing controller is derived,which uses the fractional order of the delayed system and the upper bound of system nonlinear functions.In the second method,at first a sufficient stability condition for the delayed system is given in the form of a simple linear matrix inequality(LMI)which can easily be solved.Then,on the basis of this result,a stabilizing pseudo-state feedback controller is designed in which the controller gain matrix is easily computed by solving an LMI in terms of delay bounds.Simulation results show the effectiveness of the proposed methods. 展开更多
关键词 fractional order nonlinear system time varying delay state feedback control linear matrix inequality(LMI) stabilizing
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Control Schemes for Passive Teleoperation Systems over Wide Area Communication Networks with Time Varying Delay 被引量:1
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作者 Shafiqul Islam Xiaoping P.Liu +2 位作者 Abdulmotaleb El Saddik Lakmal Seneviratne Jorge Dias 《International Journal of Automation and computing》 EI CSCD 2014年第1期100-108,共9页
In this paper,the problem of time varying telecommunication delays in passive teleoperation systems is addressed.The design comprises delayed position,velocity and position-velocity signals with the local position and... In this paper,the problem of time varying telecommunication delays in passive teleoperation systems is addressed.The design comprises delayed position,velocity and position-velocity signals with the local position and velocity signals of the master and slave manipulators.Nonlinear adaptive control terms are employed locally to cope with uncertain parameters associated with the gravity loading vector of the master and slave manipulators.Lyapunov-Krasovskii function is employed for three methods to establish asymptotic tracking property of the closed loop teleoperation systems.The stability analysis is derived for both symmetrical and unsymmetrical time varying delays in the forward and backward communication channel that connects the local and remote sites.Finally,evaluation results are presented to illustrate the efectiveness of the proposed design for real-time applications. 展开更多
关键词 TELEOPERATION TELEROBOTICS Lyapunov-Krasovskii functional time varying delay passive systems
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Mixed sensitivity H_∞ control for LTI systems with varying time delays
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作者 OULD MOHAMED Mohamed vall 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2018年第3期611-617,共7页
Designing a robust controller for a system with timevarying delays poses a major challenge. In this paper, we propose a method based on mixed sensitivity H∞ for the control of linear time invariant(LTI) systems wit... Designing a robust controller for a system with timevarying delays poses a major challenge. In this paper, we propose a method based on mixed sensitivity H∞ for the control of linear time invariant(LTI) systems with varying time delays. The time delay is assumed bounded and the upper bound is known. In the technique we propose, the delay affecting the plant to be controlled is treated as an unmodeled uncertainty(in form of multiplicative uncertainty). That uncertainty is approximated and then an H∞based controller, for the plant represented by the multiplicative uncertainty and the nominal model, is calculated. The obtained H∞controller is used to control the LTI systems with varying time delays. Simulation examples are given to illustrate the effectiveness of the proposed method. 展开更多
关键词 linear time invariant(LTI) systems mixed sensitivity H∞ varying time delay unmodeled uncertainty H∞ control
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Delay and Its Time-derivative Dependent Robust Stability of Uncertain Neutral Systems with Saturating Actuators 被引量:1
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作者 Fatima El Haoussi El Houssaine Tissir 《International Journal of Automation and computing》 EI 2010年第4期455-462,共8页
This note concerns the problem of the robust stability of uncertain neutral systems with time-varying delay and saturating actuators. The system considered is continuous in time with norm bounded parametric uncertaint... This note concerns the problem of the robust stability of uncertain neutral systems with time-varying delay and saturating actuators. The system considered is continuous in time with norm bounded parametric uncertainties. By incorporating the free weighing matrix approach developed recently, some new delay-dependent stability conditions in terms of linear matrix inequalities (LMIs) with some tuning parameters are obtained. An estimate of the domain of attraction of the closed-loop system under a priori designed controller is proposed. The approach is based on a polytopic description of the actuator saturation nonlinearities and the Lyapunov- Krasovskii method. Numerical examples are used to demonstrate the effectiveness of the proposed design method. 展开更多
关键词 Actuator saturation neutral systems unccrtainty delay-dependent condition linear matrix inequality (LMI) time varying delay systems.
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Controllability results for nonlinear impulsive integrodifferential evolution systems with time-varying delays
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作者 Bheeman RADHAKRISHNAN Krishnan BALACHANDRAN 《控制理论与应用(英文版)》 EI CSCD 2013年第3期415-421,共7页
In this paper, we study the controllability results for the nonlinear impulsive integrodifferential evolution systems with time-varying delays in Banach spaces. The sufficient conditions of exact controllability is pr... In this paper, we study the controllability results for the nonlinear impulsive integrodifferential evolution systems with time-varying delays in Banach spaces. The sufficient conditions of exact controllability is proved under without assuming the compactness of the evolution operator. The results are obtained by using the semigroup theory and the Schafer fixed point theorem. 展开更多
关键词 CONTROLLABILITY Impulsive integrodifferential system Evolution operator time varying delay Fixed point theorem Semigroup theory
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