A contribution to control and observation of networked control systems

Abstract : This PhD thesis is dedicated to the exponential output stabilization of linear NCS (Networked Control Systems). The studied solution is based on a remote observer which is able to estimate the present state of the plant despite the various network induced delays. These last are present in both the control and the measurement channels.The first chapter describes the problem and gives a survey on the NCS. The next chapter proposes a computer structure which realizes the remote, observer-based, state feedback controller. The following two chapters propose LMI conditions (Linear Matrix Inequalities) for the design of the observer-based remote controller. The second method of Lyapunov is used with the most up-to-date Lyapunov-Krasovskii functionals. The main objective of the design is to guarantee some performances expressed in the form of exponential stability. Then some enhancements of the control strategy are given. It consists in taking into account the Quality of Service (QoS) in the controller to get better guaranteed performances. The last contribution of this work is to consider the overall system as an event-driven system. It allows one to consider packet dropout problems in the network.The effectiveness of all presented results is demonstrated by real experiments implemented on a light robot controlled over the Internet
Document type :
Automatic. Ecole Centrale de Lille, 2009. English. <NNT : 2009ECLI0009>

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Submitted on : Wednesday, March 16, 2011 - 12:24:19 PM
Last modification on : Monday, May 30, 2011 - 1:52:07 PM




  • HAL Id : tel-00410467, version 2



Wenjuan Jiang. A contribution to control and observation of networked control systems. Automatic. Ecole Centrale de Lille, 2009. English. <NNT : 2009ECLI0009>. <tel-00410467v2>




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