H_∞ Control For Uncertain Sampled-Data Systems

Sampling control widely exist in all kinds of physical system.For example Time-sharing system,Radar tracking system and industrial production process controlsystem and so on.Disturbance input often in?uence system,performance even causethe system instability.In engineering condition practical control system because forthe in?uence of the environment and equipment error such factors.It makes theanalysis and comprehensive with our mathematical model of precise match betweenimpossible,there will be indefinite.Because the sampled-data system applied to theanalysis of the traditional method is caused Sampling time signal loss directly.Inrecent years, lifting method receives the general readers pay more attention.Thispaper studies sampled-data system the design of H∞,introduced in recent yearspopular lifting method in the design problem,Proposes suitable for the new methodof sampled-data system design for H∞.In this paper the ascension of sampled-data system technology is studied for aclass of sampled-data system containing disturbance input of H∞dynamic outputfeedback control problem.After sampling system upgrade based on the H∞equiv-alent discrete system,In the form of linear matrix inequalities given sampled-datasystem H∞dynamic compensator the necessary and su?cient conditions of exis-tence,got better controller solution scheme.This article will enhance the technicalapplication in sampled-data system H∞various design issues,to contain parameteruncertainty in the sampling system under the e?ect of unmodeled disturbance ofrobust H∞state feedback control problem is studied,the sampled-data system aregiven in pole constraints cases robust H∞controller design method.With uncer-tain sampling system in the H∞control as the main line,giving a class has poleconstraints uncertain sampling system, the su?cient condition for robust stability,realizing the system can also resistance to model the disturbance and outside in-terference, and when there for the model of disturbance steadystate value changeachieved better control.