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Flight management system providing minimum total cost

  • US 4,760,530 A
  • Filed: 06/17/1986
  • Issued: 07/26/1988
  • Est. Priority Date: 06/17/1986
  • Status: Expired due to Term
First Claim
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1. Flight Management System apparatus for aircraft comprisingmeans for generating a DOC signal which is a function of direct operating cost (DOC) versus arrival time in accordance with a range of cost index values,means for storing values of arrival time error cost (AEC) versus arrival time error and providing an AEC signal which is function of said values,means for combining said DOC signal with said AEC signal to provide a total flight cost signal which is a function of total flight cost, thereby establishing a signal representative of total flight cost versus arrival time,minimizing means responsive to said total flight cost signal for determining a minimum thereof to provide an optimum arrival time signal,means responsive to said optimum arrival time signal for providing an optimum cost index signal corresponding thereto,speed generator means responsive to said optimum cost index signal for generating an airspeed signal corresponding thereto in accordance with minimum direct operating cost,predictor means responsive to said optimum cost index signal for generating a predicted arrival time signal in accordance therewith, andspeed adjuster means responsive to said optimum arrival time signal, said predicted arrival time signal and said airspeed signal for adjusting said airspeed signal in accordance with the difference between said optimum arrival time signal and said predicated arrival time signal to provide an airspeed command signal for controlling the airspeed of said aircraft.

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