Generalized design of mixed H-infinity/deadbeat suboptimal controllers for SISO continuous-time servo systems

This paper is concerned with a mixed H_∞/deadbeat suboptimal control problem for SISO continuous servo systems. By considering the deadbeat tracking, time domain performance may improve. Simultaneously, to improve frequency domain performance of the closed loop system, H_∞ norm constraint is introduced. This problem gives the deadbeat tracking control with H_∞ norm constraint and has been studied by Nobuyama et al. and Tsumura et al. individually. However, there is a structural difference between their designs. This paper proposes a new controller design of the mixed H_∞/deadbeat suboptimal control problem. The controller is more general since the structure of the controller covers those of the previous two designs