Robust control for a plant with variable operating conditions --design of a two-degree-of-freedom servosystem via an interpolation approach

摘要

This paper proposes a two-degree-of-freedom robust servosystem for a plant with variable operating conditions. The plant is described as a linear interpolation of proper stable coprime factorizations of transfer functions of two representative models identified at representative operating points. An interpolation approach is utilized to design the feedback and feedforward compensators of the two-degree-of-freedom controller. The control system has the robust servo property at any operating point.