CONTROL SYSTEM FOR AN ELECTROHYDRAULIC ACTUATOR

摘要

A control system for an electrohydraulic actuator (56) of the doser type, in which the doses of fluid injected into or removed from the actuator control chamber (22) are metered by timed openings of solenoid valves (32, 34) operated by a periodic pulse width signal generated as a function of the error between the actual position and a desired position of the actuator. According to this invention, the base pulse width signal is modified by correction means when the error is within a predetermined band width where response of the actuator to said signal is uncertain. For use particularly in aircraft appliances.