Gain-scheduling controller design of time varying system

The fixed-point method had been widely used as design method of controller for the time-varying system. The existing drawbacks for the method were discussed. It was shown that the descent and even instability of the performance of the closed-loop system will result in due to neglect of induced disturbance. To overcome the drawbacks of the method, the modern method to design gain-scheduling controller was employed, in which the performance of the closed-loop system not only was considered, but also the suppression for time-varying induced disturbance was taken into consideration. The controller is the function of parameters and the satisfied performance will be achieved by using adjustment of parameters.