Optimal Minimax Control Solution Using Rate Feedback

Optimal minimax rate feedback controller design problems was proposed and partially solved by R.S. Bucy et al. in 1990. By employing Grobner basis technique, the complete symbolic solution for the case when the cardinality of the plant oscillatory mode is 3 or less was later found by N.K. Bose and the author. In this paper, it is shown that, for a specified generic plant, significant improvement in feedback system performance over what was believed to be possible can be realized by incorporating in rate feedback controller the additional parameter available in the basic design procedure. This newly added design parameter expands the searching space for optimal solution (i.e. provides higher degree of freedom)