A practical control system design may require that several different performance specifications be considered at the same time. Generally, a controller may be able to satisfy multiple conflicting performance specifications through manual gain tuning, however, when the specifications are stringent, finding suitable gains with this approach may be difficult. Therefore, there exists a need for a control design methodology to permit the systematic design of controllers to satisfy multiple simultaneous specifications.

This thesis presents the application of a feedback control design method, referred to here as a Multiple Simultaneous Specification (MSS) control design method, which addresses the design of controllers to satisfy multiple simultaneous conflicting design specifications. The MSS control design method utilizes the convexity of common closed-loop performance specifications with respect to the closed-loop system transfer function to combine a set of "sample controllers", each tuned to satisfy at least one closed-loop performance specification, to formulate a single controller which satisfies all specifications. While control gain tuning is central to the design process, the tuning process is greatly simplified, when compared with the tuning exercise presented when a single set of control gains is adjusted to satisfy a set of multiple simultaneous closed-loop specifications.

The proposed MSS control method is applied to a high-speed AC induction motor, with an inner-loop Flux Vector Controller applied, to design a position control system. Simulation and experimental results verify the effectiveness of this method.