Control System Design Using Vector-Valued Performance Criteria with Application to the Control Rate Reduction in Parameter Insensitive Control Systems

摘要

A design strategy is suggested which uses for the optimization of the control system, a vector-valued performance-criterion such that a systematic step-by-step improvement of the performance vector is achieved, i.e., at each stage the performance of some components is improved without impairing that of the others, so that finally the optimal design is obtained. This technique is used to design a parameter-insensitive flight-path controller which, compared with earlier designs, has both a larger reduction in sensitivity and a considerable reduction in the maximal control rate. The design shows that a controller can have considerably reduced sensitivity without increasing the demands on the actuator system. This result is due primarily to the control rate being directly considered in the design. The controller-synthesis technique based on vector-valued performance-criteria as here suggested is feasible even when the number of design aspects is large.