Nowadays a chance using microcomputers for the design of digital feedback control system becomes increase. However existing digital control theory has many problems which must be solved before practical use. For example, in existing digital control theory, the time delay arising form the computation time is not properly accounted.
The authors have proposed a design method of the optimal state regulator accounting controlling time delay in the previous paper and have solved many other important problems.
The contents of this paper are the followings.
(1) Using the fundamental relation derived in the previous paper, a design method of the optimal digital servosystem is firstly proposed in which the optimal feedback gain matrices are derived from solving corresponding optimal output regulator problem.
(2) And another design method of the optimal digital servosystem accounting controlling delay is proposed. The feedback gain matrices of this servosystem are also derived form solving corresponding optimal output regulator problem.
The results are very simple and they seem to be suited for the practical use.