Robust control with adaptation mechanism for improving transient behaviour

This paper deals with the problem of designing a robust controller with ada ptation mechanisms for the purpose of improving transient performance in ti me-response. The controlled object is a linear system with unknown paramete rs which vary within certain prescribed bounds. In the proposed method, a t arget model with adjustable parameters is constructed in order to obtain on -line information on parameter uncertainty and to improve transient time-re sponse. A robust controller is established in a parameter-dependent form, i n which parameters are adjusted on-line on the boundary surface of the poss ible parameter space according to the error between the state trajectory of the plant and that of the target model.