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Damping for electromechanical actuators

  • US 7,109,679 B2
  • Filed: 03/09/2004
  • Issued: 09/19/2006
  • Est. Priority Date: 03/09/2004
  • Status: Expired due to Fees
First Claim
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1. A damped system for moving a load, comprising:

  • an electric motor having damping means;

    a mechanical connection between the electric motor and the load;

    a transducer to sense an indicator related to load force or torque and produce a feedback signal; and

    a controller connected to the electric motor and providing a motor control signal to move the load to a desired position, and connected to the transducer for receiving the feedback signal and adjusting the motor control signal based on the feedback signal whereby disturbances to the position of the load are damped;

    wherein the damping means comprises a resistance and a switch for connecting the motor windings in a short circuit with the resistance in response to loss of power to the motor, whereby oscillating disturbances to the position of the load are damped even when there is no power to the motor.

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