Practical Considerations for Override Compensator Synthesis and Implementation

This paper discusses some of the practical considerations involved in the synthesis and implementation of override compensators for systems which have outputs constrained to lie below certain thresholds. The paper assesses three different override architectures: the first, a generic override control scheme from the literature; the second, a sub-class of the first which offers easier tuning and implementation at the expense of flexibility; and the third, a new modification of the generic scheme which is more flexible than the second, but of similar complexity. The various schemes are demonstrated and compared using a simulation case-study of a permanent-magnet-synchronous-motor speed control system.