Research On Iterative Identification And Control Method Based On V-gap Metric

System identification is the theory and methodology of establishing the model of the unknown system using data (input output data) observed from it. As a main approach of building mathematic model of the controlled plant, system identification develops very fast in the recent 20 years, and has been an very active and important branch of automatic control theory. Now it has been used widely in natural science, social science etc. for example, in modeling of system and simulation performance prediction, fault diagnosis, adaptive control and quality control and so on.System identification should serve for controller design. Iterative identification and control has been studied widely in recent years as an efficient methodology for the design of high performance controllers of complex plants. It is a combined algorithm of identification and control. The paper first reviews the status quo of the v-gap metric and iterative identification and control , presents the definition of v-gap metric, introduces the basic knowledge of system identification and the general framework of iterative identification and control; Then this paper presents an algorithm of iterative identification and control which combines the v-gap metric and the H∞loop shaping controller design method, and gives an emphasis on the research of identification algorithm based on v-gap metric, compared with an identification algorithm for Finite Impulse Response models, the feasibility and rationality of this algorithm is validated; At last ,using H∞loop shaping method, a controller was designed for the Mass-Spring-Damper System and simulation results of robustness analysis and step response with and without disturbance of the closed-loop system are given..