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Aircraft collision-avoidance device, notably ground collision, by control of angle of descent

  • US 5,608,392 A
  • Filed: 03/22/1995
  • Issued: 03/04/1997
  • Est. Priority Date: 03/22/1994
  • Status: Expired due to Term
First Claim
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1. An aircraft collision-avoidance device comprising:

  • means for producing a first three-dimensional coordinate representative of an aircraft position;

    a database configured to hold database information comprising,a three-dimensional theoretical glide slope vector,a second three-dimensional coordinate representative of a touchdown point of a landing strip,a first threshold value,a second threshold value, andan airport position;

    means for comparing said aircraft position and said database information to determine if said aircraft is near said airport;

    means for extracting a second three-dimensional coordinate from said database information when said aircraft position is near said airport;

    means for calculating a three-dimensional real glide slope vector based on said first three-dimensional coordinate and said second three-dimensional coordinate; and

    means for producing a collision-avoidance signal corresponding to said three-dimensional real glide slope vector and said three-dimensional theoretical glide slope vector, said means for producing further comprising,means for calculating a horizontal deviation value between said three-dimensional real glide slope vector and said three-dimensional theoretical glide slope vector,means for calculating a vertical deviation value between said three-dimensional real glide slope vector and said three-dimensional theoretical glide slope vector, andmeans for outputting said collision-avoidance signal when at least one of said horizontal deviation value is greater than said first threshold value and said vertical deviation value is greater than said second threshold value.

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