Modulation method of helicopter forward-looking prediction ground proximity warning envelope based on altitude and descent speed

Abstract

The invention relates to a helicopter forward-looking forecast ground proximity warning envelope modulation method based on height and descending speed. The helicopter forward-looking forecast ground proximity warning envelope modulation method comprises the steps of: S1, acquiring crosslinking equipment input information of a helicopter terrain awareness and warning system (HTAWS); S2, judging whether a real-time ground velocity signal in the input information is valid at present; S3, providing an independent variable gamma required for representing ascending and descending tendencies of a helicopter in warning envelope modulation, and generating a forward-looking forecast ground proximity warning envelope line based on the independent variable gamma; S4, and judging whether a terrain or obstacle which invades a warning range formed by the forward-looking forecast ground proximity warning envelope line exists in front of the helicopter. The helicopter forward-looking forecast ground proximity warning envelope modulation method has the advantages of excluding the terrain or obstacle warning source which does not cause actual threat to flight from the warning range through establishing correlation between flight attitude and a warning strategy, expanding helicopter ground proximity mobile freedom degree, reducing interference to normal operation of the flight crew, and increasing ground proximity warning reliability.

Description

technical field [0001] The invention relates to a helicopter forward-looking warning, in particular to a helicopter forward-looking prediction ground proximity warning envelope modulation method based on altitude and descending speed. Background technique [0002] With the increasing application of helicopters in all walks of life in our country, the reliability requirements for the Helicopter Terrain Awareness and Warning System (HTAWS) are becoming increasingly urgent. The variable mission types of helicopters, the low flight altitude, and the characteristics of being easily affected by complex weather conditions all determine the important role of HTAWS in avoiding controlled flight into terrain (CFIT) of helicopters. At present, in terms of forward-looking prediction, the HTAWS system mainly forms an alarm envelope by inputting real-time flight parameter information, and compares it with the terrain database to determine whether there is a CFIT risk. The above-mentioned...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the helicopter terrain awareness and warning system (HTAWS) is prone to false alarms and false alarms in the prior art, and to provide a novel helicopter forward-looking prediction ground proximity warning envelope modulation method based on altitude and descent speed

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