A loop transfer recovery approach to the control of an electro-hydraulic actuator

Abstract A linear-quadratic Gaussian (LQG) technique followed by a loop transfer recovery (LTR) approach is adopted to synthesize a robust controller for a high-performance industrial electro-hydraulic actuator. The actuator moves a platform that carries a variable load and is subject to parameter variations and disturbances. The recovery procedure provides sufficient stability and performance robustness to the closed loop system. The system is tested with various parameter variations occurring in the field and is found to perform satisfactorily.