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Stability Analysis of Networked Control Systems

Author: MengQingFeng
Tutor: ZhangYingWei
School: Northeastern University
Course: Control Theory and Control Engineering
Keywords: Network Control System Network induced delay Packet loss Lyapunov stability theory
CLC: TP273
Type: Master's thesis
Year: 2009
Downloads: 53
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Abstract


With the continuous development of network technology and computer technology , network - based control system is being replaced by a point-to-point structure of the control system . Through the network to form a closed - loop control system , referred to as a network control system (Networked Control Systems , NCSs) . The NCSs The main advantage is that resource sharing can be achieved , to install and simple to maintain and increase the flexibility and reliability of the system . In this paper, network-induced delay and packet loss two basic issues as the research object , using the Lyapunov stability theory , improved free - weighting matrix method to study the network control system of network induced delay and packet loss , the stability of the network control system analysis and design methods of controller . For linear the continuous network control system , not consider the packet loss during transmission , the establishment of a single-input single - output system model . Model for single- packet transmission network control system , considering the phenomenon of the transmission network induced delay and packet loss , take advantage of the improved free - weighting matrix method , the stability criterion of the system , and at a given controller the case , access to the network controller design method , based on the calculation method based on linear matrix inequalities maximum allowable network-induced delays . Given for a class of nonlinear networked control systems with uncertain network-induced delay and packet loss , a new closed-loop network control system modeling methods - fuzzy the TS method using fuzzy model to approximation of nonlinear network control system , so that local linearization . Considered parameter uncertainty has norm bounded characteristics , and based on the delay systems theory and Lyapunov function method and linear matrix inequalities , given controller design method , results are expressed as linear matrix inequalities .

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