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Anti-skid electronic control system having an error detecting circuit

  • US 4,113,321 A
  • Filed: 02/28/1977
  • Issued: 09/12/1978
  • Est. Priority Date: 03/24/1976
  • Status: Expired due to Term
First Claim
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1. An improvement in a digital anti-skid electronic control system including a different channel assigned to each controlled wheel, each of said channels having a converter to convert a sensed wheel velocity signal into a digital value and a digital arithmetic circuit connected to said converter to provide an output signal to control a final control element which controls braking pressure, said improvement comprising:

  • a digital secondary circuit for each of said channels, each of said secondary circuits being identical with one of said arithmetic circuits, each of said secondary circuits being connected to the output of a different one of said converters; and

    a digital circuit means coupled to said arithmetic circuit and said secondary circuit of each of said channels, said circuit means being responsive to predetermined output signals from each of said arithmetic circuits and each of said secondary circuits to detect an error condition in any of said arithmetic circuits and any of said secondary circuits and to disable said control system entirely upon detection of said error condition.

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