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Arrangement for controlling the position of an aircraft control surface

  • US 4,885,514 A
  • Filed: 12/24/1987
  • Issued: 12/05/1989
  • Est. Priority Date: 12/24/1987
  • Status: Expired due to Term
First Claim
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1. An arrangement for controlling the position of an aircraft control surface member, comprising:

  • means for supplying electric power;

    means for issuing an electric input signal having a value that is indicative of the desired position of the control surface member at least while electric power is being supplied by said supplying means;

    means for amplifying said input signal, including an input terminal receiving said input signal and an output terminal carrying an output signal;

    means connected to said output terminal and operative for positioning the control surface member in dependence on said output signal;

    means for storing electric charge, including one terminal connected to said input terminal of said amplifying means and another terminal connected to said output terminal, said storing means being discharged upon interruption of the supply of electric power by said supplying means and recharged with a predetermined time constant upon restoration of such supply;

    means for detecting the restoration of the supply of electric power by said supplying means and issuing a switching signal for a predetermined time interval immediately following such restoration; and

    means for recharging said storing means to said correct value immediately after the restoration with a time constant amounting at most to a small fraction of said predetermined time constant, including means for grounding said one terminal of said storing means in response to and for the duration of said switching signal.

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