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System for controlling hydraulic actuator

  • US 6,789,458 B2
  • Filed: 12/12/2002
  • Issued: 09/14/2004
  • Est. Priority Date: 03/08/2000
  • Status: Active Grant
First Claim
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1. A hydraulic control system comprising:

  • a hydraulic actuator including a piston contained in a hydraulic cylinder;

    a fluid flow sensor having a sensor signal relating to a differential pressure across a discontinuity within a hydraulic fluid flow traveling into a cavity of the hydraulic actuator defined by the piston and the hydraulic cylinder;

    a controller configured to calculate piston information and produce a control signal in response to a comparison of the piston information to a reference.

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