Synthetic vision system calibration method based on airborne instrument landing device

Abstract

The invention discloses a synthetic vision system calibration method based on an airborne instrument landing device. The method comprises the following steps: calibrating a synthetic vision system at an approach stage by adopting spatial angle information given by an instrument landing system as a reference system; determining a calibration sampling time, calibrating a single-time sampling number, and calibrating the threshold; acquiring a course surface included angle and a lower slide-way angle obtained by the synthetic vision and instrument landing system in real time in the approach process; calculating calibration statistics by adopting the acquired included angle data; carrying out the availability calibration for the synthetic vision system by utilizing the calculated calibration statistics. By adopting the method, the weakness of the traditional method for calibrating the airport characteristic synthetic vision display availability can be overcome, the capacity for calibrating the altitude or angle information situation of the synthetic vision system can be improved, and the calibration efficiency for the updating of the synthetic vision caused by little change of the altitude of an airplane in the calibration process can be improved; the practicability of the synthetic vision system at the approach stage can be effectively improved, and the security of the low altitude flight can be improved.

Description

technical field [0001] The invention relates to a verification method in the actual application process of a synthetic vision system, in particular to a verification method of a synthetic vision system based on an airborne instrument landing device during an aircraft approach. Background technique [0002] Faced with the complex terrain and meteorological environment encountered by the aircraft during flight, in order to enable pilots to perceive the external environment in real time and ensure flight safety, it is necessary to use information perception, image processing and other technologies to present the surrounding environment of the aircraft. Based on the attitude of the aircraft, high-precision navigation, terrain database, obstacles and other related technologies, the synthetic vision system uses computer-generated forward virtual vision as an aid to traditional instruments to help pilots "see" the flying environment around them, Reduce workload. [0003] The synth...

AI Technical Summary

Problems solved by technology

[0005] In order to avoid the deficiencies in the prior art, the present invention proposes a method for verifying the synthetic vision system based on airborne instrument landing equipment, using the spatial angle information given by the instrument landing system as The vision system is calibrated; to solve the problem that the existing altitude-based calibration method has a large error in the angle or attitude calibration, effectively improve the usability of the synthetic vision system during the approach phase, and improve the safety of low-altitude flight

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