H_? Output Feedback Control Systems Design

In many cases,the study of output feedback control is of great practical significance because states of the system are not completely measurable,it is often unable to get feedback and the state feedback control law is difficult to implement.When the controlled system is nonlinear,considering the measurement deviation,unknown parameters and other uncertain factors,how to design appropriate output feedback controller has important theoretical significance and application value.In addition,considering the constraints of distance and bandwidth,the continuous signal can be converted into multi-segment discrete values to reduce the burden of information transmission in the communication channel by introducing quantization technology in the network control system.This paper studies the problem of output feedback control for linear systems and T-S fuzzy systems with output quantization by using linear matrix inequality.The main research work of this paper is as follows:1.The problem of H_? output feedback control for a class of linear systems is studied.A new condition for output feedback H_?controller design is proposed.A rigorous theoretical proof is given to show that the proposed design condition is less conservative than some existing conditions.Numerical simulation shows the effectiveness of the proposed control method.2.The problem of H_? output feedback control is investigated for a class of T-S fuzzy systems with output quantization.The design condition of the output feedback controller is presented,which makes the closed-loop system asymptotically stable and satisfies the given H_?performance constraint based on the theory of linear matrix inequality.Numerical simulation shows the effectiveness of the proposed control method.