Motive simulation table mixed sensitivity design applying sampled-data control theory

For a motive simulation table servo control system with the discrete controller robust stability and the intersample information are the two main difficulties to deal with. In this paper we adopt mixed sensitivity design method to solve the robust stability problem and by using sampled-data control theory: we can avoid losing the intersample behavior of the system. Firstly, we convert the control problems of motive simulation table into the design problems of the standard sampled-data control system, and define the sensitivity function and the complementary, sensitivity function. Secondly, keeping in mind the special characteristics of the motive simulation tables, we derive the formula of the relationship between the weighted functions and the dynamic index of the system. Thirdly, after lifting the standard sampled-data control system, we apply the H-infinity norm and the stability equivalent theory to design a discrete controller: In the end, we give a concrete design example. The simulation results approve that this design method is effective.