Study on Random Vibration Control for a Hydraulic Angular Vibration Table Driven by a Continuous Rotary Electro-hydraulic Servomotor

Hydraulic angular vibration table is a kind of complex and non-linear system. Applying traditional controller to the angular vibration system, it is difficult to make the control performance to a high level. Aiming at the requirements of high frequency response and high accuracy for the random vibration system, this paper built up the dynamic model of Continuous Rotary Electro-hydraulic Servomotor controlled by valves, and proposed the adaptive friction compensation controller of continuous rotary electro-hydraulic servomotor based on the LuGre friction model for the electro-hydraulic servo angular vibration table. At the same time, the random vibration replication experiment was carried out by using the adaptive friction compensation composite iteration control algorithm based on the frequency response estimator with self-adapting filter. The results of experiment show that the frequency response estimator with self-adapting filter is accurate for random vibration replication control and the adaptive friction compensation controller is favorable to improve system’s frequency response.