Abstract
Many interesting results have been obtained in the studies of H∞ control theory. However, since any compensator of H∞ control has much freedom, we want to know how to utilize the free parameters for other control purposes. In this paper the free parameters of the state feedback H∞ controller are used to optimize an H2 control criterion. As the results, we will show the control structure of the H∞/H2 control system and the role of the H∞ control in the HH2 control loop.
