Aircraft landing approach ground proximity warning system
阅读：858发布：2021-11-28
专利汇可以提供Aircraft landing approach ground proximity warning system专利检索，专利查询，专利分析的服务。并且In order to provide for the additional effectiveness of a ground proximity warning system during a landing approach, the waypoint signal of an Area Navigation System is used in combination with an altitude above-ground-signal to compute a minimum terrain altitude for each point along the aircraft''s approach to the runway. The minimum altitude is compared with the aircraft''s actual altitude and if it is below the minimum an alarm is activated.，下面是Aircraft landing approach ground proximity warning system专利的具体信息内容。
1. A ground proximity warning system having signal input terminals effective to receive waypoint signals and groundaltitude signals for providing warning of descent below a minimum terrain-altitude comprising: conversion means responsive to the waypoint signal for converting said waypoint signal into a signal representing a predetermined minimum approach altitude; comparison means connected to said conversion means and to the terminal for receiving the ground altitude signal for comparing said minimum approach altitude signal to the ground altitude signal; and means responsive to said comparing means for generating a minimum altitude warning signal indicative of a predetermined relation between the aircraft''s ground altitude and said minimum altitude signal.
2. The ground proximity warning system of claim 1 additionally including means for biasing the waypoint signal in order to prevent, during a predetermined portion of the approach, the minimum altitude warning signal from being generated.
3. The ground proximity warning system of claim 1 additionally including means for enabling said system below a predefined altitude.
4. The ground proximity warning system of claim 3 wherein said enabling means include: means responsive to the ground altitude signal for generating an enabling signal when the aircraft is below a predefined altitude; and gate means responsive to said enabling signal for enabling said warning signal.
5. The ground proximity warning system of claim 1 wherein said conversion means includes a scaling amplifier for generating a signal proportional to predefined ratio.
6. The ground proximity warning system of claim 5 wherein said ratio is a predetermined altitude over a predetermined distance from the end of the runway.
7. A ground proximity warning system having signal input terminals effective to receive waypoint signals and above the ground altitude signals for providing pilot warning of descent below a computed minimum altitude above the terrain during a landing approach comprising: first summing means for combining the way-point signal and a bias signal; scaling means responsive to said first summing means for scaling the output of said first summing means thereby providing a signal representive of the computed minimum altitude above the terrain; second summing means for substracting the output of said scaling means from the ground-altitude signal; circuit means for producing a first logic signal if the output of said second summing means is negative and a second logic signal if the output of said second summing means is positive; and enabling means for enabling a warning signal below a predetermined altitude.
8. The warning system of claim 7 wherein said bias signal represents a predetermined distance from the end of the runway.
9. The warning system of claim 7 wherein said scaling means is an amplifier responsive to the signal from said first summing means.
10. The warning system of claim 9 wherein said amplifier has a gain proportional to the ratio between a predetermined altitude and a predetermined distance from the runway.
11. ThE warning system of claim 10 wherein said enabling means comprises: logic means for generating an enabling signal when the aircraft is below a predetermined altitude; and a gate enabled by said enabling signal for transmitting one of said logic signals from said circuit means to a pilot alarm.
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