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Integrated aircraft air data system

  • US 5,001,638 A
  • Filed: 04/18/1989
  • Issued: 03/19/1991
  • Est. Priority Date: 04/18/1989
  • Status: Expired due to Fees
First Claim
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1. On an aircraft, an integrated air data system comprising:

  • (a) a plurality of first sensors associated with an airframe air data unit, said first sensors each providing a signal indicative of a parameter used by the airframe air data unit to determine the flight status of the aircraft;

    (b) a plurality of second sensors associated with an engine control system, said second sensors each providing a signal indicative of a parameter used by the engine control system to control the operation of an aircraft engine, the signals provided by said second sensors being redundant to the signals provided by said first sensors, the same parameter being sensed by at least one each of the first and second sensors;

    (c) a bidirectional data bus connecting the airframe air data unit to the engine control system and operative to convey data bidirectionally therebetween;

    (d) control means, disposed within both the airframe air data unit and the engine control system, and connected to the data bus, for selecting at least one of the redundant signals provided by the first and second sensors as a preferred signal for use by the airframe air data unit and the engine control system according to a predetermined logic that gives priority to using the same signal for both the airframe air data unit and the engine control system, and minimizes the effect of a failure of any one or more of the first and second sensors.

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