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METHODS AND SYSTEM FOR TIME OF ARRIVAL CONTROL USING AVAILABLE SPEED AUTHORITY

  • US 20100114407A1
  • Filed: 10/31/2008
  • Published: 05/06/2010
  • Est. Priority Date: 10/31/2008
  • Status: Active Grant
First Claim
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1. A vehicle control system using a reference time profile including an upper control bound and a lower control bound, said system comprising:

  • an input device configured to receive a required time of arrival at a waypoint;

    a processor communicatively coupled to said input device, said processor programmed to;

    determine an intermediate control point wherein the intermediate control point is a point along the upper and lower control bounds where a difference between the upper and lower control bounds is equal to approximately 2α

    Tol, where Tol is an RTA tolerance and α

    is a scaling factor;

    determine an intermediate control time wherein the intermediate control time is approximately halfway between an upper control bound time and a lower control bound time such that a margin of approximately α

    Tol is provided on either side of the intermediate control time;

    generate a first speed profile wherein the first speed profile is the speed profile necessary to meet the intermediate control time, starting from the current aircraft position at the current time;

    generate a second speed profile wherein the second speed profile is the speed profile necessary to meet the RTA starting from the intermediate control point at the intermediate control time; and

    generate the reference time profile using the first speed profile up to the intermediate control point and the second speed profile between the intermediate control point and the RTA waypoint; and

    an output device communicatively coupled to the processor, said output device configured to transmit a speed control signal based on the reference time profile to a vehicle speed control system.

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