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Control circuit for an electrically controlled servo device

  • US 5,179,330 A
  • Filed: 09/25/1990
  • Issued: 01/12/1993
  • Est. Priority Date: 09/25/1989
  • Status: Expired due to Fees
First Claim
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1. A control circuit including a set point adjuster for an electrically controlled device for actuating a power member, in particular for a controlled device having a non-linear or linear non-continuous response curve, including a microprocessor for receiving a desired magnitude for the controlled device and for delivering a control magnitude for said controlled device and further including a memory connected to said microprocessor, characterized in that the response curve of the controlled device actuating said power member is stored in said memory, said response curve being composed of a number of input magnitudes and correlated output magnitudes of said controlled device, that for controlling the controlled device the desired magnitude corresponding to a desired output magnitude of the response curve is supplied to the microprocessor and that an input magnitude linearly correlated to said desired output magnitude is read-out from the memory, said input magnitude defining a control signal indicative of said control magnitude which is delivered to said controlled device, and wherein the sensitivity of the set point adjuster is modified by modifying the input or output magnitudes of the response curve stored in said memory using an offset value and a distortion factor.

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