H/sup /spl infin// control for preview and delayed strategies

Explicit formulas on full-information H/sup /spl infin// control problem are obtained for a broader class of systems, which covers H/sup /spl infin// preview control and H/sup /spl infin// control of delay systems. The solvability is characterized by finite-dimensional operation and the control law is analytically given based on the solution to matrix Riccati equation. It is also shown that the formulas provide analytic representation of LQ control law for multiple input delay systems.