Electro-hydraulic servo system

Abstract

Abstract PURPOSE:To provide for stable and immediately responsive operation without influence of load, external disturbance and so on by incorporating static, compressibility and dynamic compensating elements at the preceeding steps of a servo amplifier of a closed loop system, and integrating a stabilization compensating element in a feedback loop. CONSTITUTION:A compressibility compensating element 9, a static compensating element 10 and a dynamic compensating element 11 are provided at the preceeding steps of a servo amplifier 8 of an electro-hydraulic servo system in a closed loop system and a stabilization compensating element 14 is integrated in a feedback loop. Influence of the compressibility of working oil, load pressure, a delay of transfer characteristic and oscillation of an electro-hydraulic servo valve are compensated by the compressibility compensating element 9, the static compensating element 10, the dynamic compensating element 11 and the stabilization compensating element 14, respectively so that the system may be controlled to closely follow a target value without influence of load fluctuation, the effect of any external disturbance, delay characteristic of the servo valve and so on.

Inventors

• 👤 Hiroshi Ikebe
• 👤 池辺　洋
• 👤 Hirotake Hirai
• 👤 洋武 平井

Bibliographic Details