Controller Design for High-Performance Thrbomachines

Abstract

This paper describes the development of an optimal control law design for the lateral vibration sup pression and stabilization of a rotor system with anisotropic fluid-film bearings and fluid leakage. Evaluation of the degree of controllability and observability and synthesis of the optimal control law using linear quadratic regulator theory accompanied by an asymptotic state observer are performed. Time responses, steady-state behavior, and singular value analysis are used to evaluate the performance and robustness of the feedback control system. Good closed-loop characteristics are obtained.