Nested Optimization Based Co-design Method for Motor Driving System

Abstract

Due to the complex structure of the motor driving system, the control performance can be influenced significantly by the plant design. To improve the control performance, a plant/controller co-design method is developed in this paper. A combined optimization index considering both the plant design and the controller design is developed for the motor driving system. By solving the proposed co-design problem, the largest load’s moment of inertia can be achieved with the same control performance. A nested optimization strategy is adopted to simplified the co-design problem to achieve the system optimality reliably and effectively. Simulation results illustrate the effectiveness of the proposed plant/controller co-design method.