抄録
A design method to the benchmark problem provided by the robust control committee in SICE is considered. The model treated in the problem is a coupled three-inertia system which reflects the dynamics of the mechanical vibrations. The problem requires to be satisfied the robust performance (both the time-domain and the frequency-domain specifications). The feedback controller is designed based on the quadratic stabilization method which can deal with the robust performance problem. The feedforward controller is used to improve the time-domain specification simultaneously. Although the closed-loop system shows the complementary sensitive aspect, the other all design specifications can be achieved.