Non-fragile robust design for servo control system of turntable

The plant of test turntable system contains model uncertainties as time-delay, parameters, etc. The realizations of controllers can´t be quite accuracy. The design concepts of the non-fragile robust performance of the system with the perturbations of the controlled members and the controllers are presented. It can be used to solve the non-fragile robustness problems of the turntable control system. It is also suggested that the design of the non-fragile robust performance can be formulated as a Hinfin mixed sensitivity problem. The selections of the weighting functions are studied and the Hinfin non-fragile robust PID controllers are solved. The simulation results show that the proposed method is valid.