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Ground collision avoidance system

  • US 5,136,512 A
  • Filed: 02/22/1991
  • Issued: 08/04/1992
  • Est. Priority Date: 06/26/1988
  • Status: Expired due to Term
First Claim
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1. In an aircraft navigation system including a plurality of navigation sensors for producing navigation data and an aircraft data bus connected to said navigation sensors for conducting said navigation data, an apparatus for warning aircraft pilots of potential collisions with terrain comprising:

  • process control means for controlling the transfer and storage of data in said warning apparatus and for initiating processing steps;

    digital interface means connected between said aircraft data bus and said process control means for interfacing said aircraft data bus for transferring data therebetween;

    shared storage means connected to said process control means for accumulating navigation data detected on said bus;

    data validation means connected to said process control means for detecting the validity of altitude data;

    data processing means connected to said process control means for extrapolating a terrain rate estimate in response to said altitude data, for extrapolating a dive/climb angle in response to said terrain rate estimate, for producing a dive recovery time in response to said extrapolated dive/climb angle, for producing a pilot response time, for producing a roll recovery time, and for producing altitude loss data in response to said pilot response time, said roll recovery time, and said dive recovery time; and

    warning means connected to said process control means for providing warnings based on an output of said data processing means.

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