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Actuator control system and method

  • US 7,621,123 B2
  • Filed: 01/19/2007
  • Issued: 11/24/2009
  • Est. Priority Date: 01/20/2006
  • Status: Expired due to Fees
First Claim
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1. An actuator control system, comprising:

  • a source of hydraulic fluid;

    a pump in fluid delivery communication with said source of hydraulic fluid;

    an electric motor operatively coupled to said pump for driving said pump for supplying a pressured fluid flow of hydraulic fluid from said source of hydraulic fluid;

    a solenoid operated directional valve in fluid delivery communication with said pump for receiving said pressurized fluid flow of hydraulic fluid supplied from said pump and allowing said pressurized fluid flow through said solenoid operated directional valve upon operation thereof;

    a hydraulic actuator in fluid delivery communication with said pressurized fluid flow through said solenoid operated directional valve for moving a member of said hydraulic actuator at a velocity and force upon operation of said solenoid operated directional valve, wherein said hydraulic actuator is a rotary actuator and said member is a rotary member;

    a variable speed controller operatively coupled to said electric motor; and

    a motor feedback loop operatively coupled from said electric motor to said variable speed controller for providing feedback signals correlative to a pressure of said pressurized fluid flow for driving said member of said hydraulic actuator in response to said feedback signals for providing electronic velocity and force control of actuation of said member of said hydraulic actuator.

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