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Acceptance testing of actuators using backlash and stiction measurements

  • US 20060060078A1
  • Filed: 07/27/2005
  • Published: 03/23/2006
  • Est. Priority Date: 07/28/2004
  • Status: Active Grant
First Claim
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1. An actuation system, comprising:

  • a base;

    an actuator coupled to the base, the actuator being configured to move a load relative to the base; and

    a test subsystem coupled to the actuator, the test subsystem being configured to acceptance test the actuator, the test subsystem including (i) a sensing circuit, (ii) a controller, and (iii) a communications medium connecting the sensing circuit and the controller, the controller being configured to;

    obtain a first rate of change of an operating characteristic of the actuator, the first rate of change being based on previous measurements of actuator movement, generate a second rate of change of the operating characteristic of the actuator from current measurements of actuator movement and at least some of the previous measurements of actuator movement, and electronically indicate whether the actuator is in acceptable condition based on a comparison of the second rate of change and the first rate of change.

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