A Threshold and Envelope Design Method for Earth Proximity Warning System

Abstract

The invention provides a design method for a threshold value and an envelop wire of a near-earth alarm system, and aims at improving limitation in design of the threshold value and the envelop wire of the existing near-earth alarm systems. Probability of generation of earth collision danger in the flight process is calculated via comparison of landform height and flight track height on the basis of establishment of a landform height statistic model and a state transfer model; and the design method for the threshold value and the envelop wire of the near-earth alarm system is provided in combination with performance analysis of the near-earth alarm system so that timely and effective alarm information with low false alarm rate is provided for airplanes.

Description

technical field [0001] The invention relates to a threshold and envelope design method applied to an airborne ground proximity warning system, which belongs to the field of ground proximity warning. Background technique [0002] The Ground Proximity Warning System (GPWS) is an avionics device widely used in military and civil aircraft in recent years. Its main function is to judge whether the aircraft is in danger of collision with the ground, so as to reduce the accident of controlled flight into the ground. When the aircraft is in danger of colliding with the ground, the ground proximity warning system provides warning instructions to the crew to prevent the accident of crashing into the mountain and effectively improving flight safety. [0003] The core component of the ground proximity warning is the warning calculation, that is, according to the aircraft position and other information provided by the airborne cross-linking equipment, the warning calculation is carried o...

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Problems solved by technology

[0004] For the performance of the ground proximity warning system, it is necessary to design and optimize the warning threshold and the envelope, but due to the complexity and diversity of the design to the terrain height, the design of the warning threshold and the envelope is difficult

There are related technical researches on the threshold design of the Earth Proximity Warning System in China, but most of them are based on a large number of repeated simulation tests under different terrain data. and envelope design, as well as real-time envelope modulation during actual flight, etc.

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