High precision aircraft automatic near-ground collision avoidance system terrain scanning method based on error theory

Abstract

The invention discloses a high precision aircraft automatic near-ground collision avoidance system terrain scanning method based on an error theory. The high precision aircraft automatic near-ground collision avoidance system terrain scanning method comprises the following steps that S1, navigation data (GPS / INS), terrain data and quality date files of the navigation data (GPS / INS) and terrain data are acquired; S2, flight paths and accuracy of an aircraft are predicted; S3, the airplane mode of the aircraft is judged; S4, a terrain scanning area is constructed; S5, the terrain data in the terrain scanning area is read; S6, a terrain envelope is constructed; and S7, terrain collision monitoring and avoidance are conducted. The high precision aircraft automatic near-ground collision avoidance system terrain scanning method based on the error theory has the advantages that collision monitoring and automatic avoidance are achieved, thus the false alarm rate of a system is lowered, reliability of the automatic near-ground collision avoidance system is improved, and flight safety is effectively guaranteed.

Description

technical field [0001] The present invention relates to the field of aviation control technology, especially the terrain collision and terrain avoidance technology involved in ground proximity warning equipment based on digital terrain database widely used in aircraft. Such systems include but not limited to aircraft ground proximity warning equipment, ground proximity warning equipment, Specific products of avionics equipment such as collision avoidance system, terrain warning and warning system, and integrated environmental monitoring system. Background technique [0002] Aircraft comprehensive environmental monitoring systems such as Ground Proximity Warning System (GPWS) and Terrain Awareness and Warning System (TAWS) are important airborne system equipment for aircraft. Their working principles are as follows: figure 1 As shown, based on the current flight state parameters provided by the navigation equipment (GPS / INS), the system uses a high-precision trajectory predic...

AI Technical Summary

Problems solved by technology

The range of the terrain scanning area directly affects the false alarm rate and performance of the system. Excessive scanning width is likely to cause false alarms of the system, causing unnecessary evasive maneuvers of the aircraft, affecting the execution of aircraft tasks, and increasing the calculation time of the system; too small scanning width The width is insufficient for the protection of the aircraft, and cannot effectively prevent the controllable flight into the terrain accident (CFIT), so a strict terrain scanning algorithm must be established

Since the current terrain scanning algorithms are mostly based on empirical parameters established by experience or flight data, and lack strict theoretical models, it is necessary to establish a strict terrain scanning area algorithm

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