Radio altimeter data fusion height measuring system and method

Abstract

The invention provides a radio altimeter data fusion height measuring system and method. The radio altimeter data fusion height measuring system comprises a processor, a radio height measuring unit, a gyroscope, an accelerometer and a barometer. The processor is connected with the radio height measuring unit, the gyroscope, the accelerometer and the barometer. The radio altimeter data fusion height measuring system and method have the advantages that data fusion is conducted on a basic aircraft radio height value, a basic aircraft inclination angle value, a basic aircraft acceleration value and a basic aircraft pressure height value, it is guaranteed that a reasonable to-earth absolute height value is provided for an aircraft when the ground condition is complex, an accurate to-earth absolute height value is provided in the super-maneuverable flight process, and the flight safety of the aircraft is improved.

Description

technical field [0001] The invention belongs to the technical field of aircraft height measurement, and in particular relates to a radio altimeter data fusion height measurement system and a height measurement method. Background technique [0002] The radio altimeter is one of the important electronic devices of aerospace vehicles, mainly used to measure the absolute altitude of the aircraft. The working principle of the radio altimeter is: use the principle of radio wave reflection to work. Specifically, a radio transmitter and a radio receiver are installed on the aircraft. When measuring, the radio transmitter transmits radio waves to the ground through the transmitting antenna, and the radio receiver will successively The received radio waves transmitted directly from the radio transmitter are compared with the echoes reflected by the ground, and there is a time difference between the two beams of radio waves. If the electric wave is not disturbed during transmission, t...

AI Technical Summary

Problems solved by technology

Existing radio altimeters have the characteristics of accurate altimetry at low altitudes when measuring the absolute altitude of an aircraft; however, when the flight path passes through tall buildings or deep trenches, or when the aircraft is performing maneuvering flight with large pitch and large roll, There will be inaccurate radio altimeter height measurement, which will affect the control accuracy and system stability of the aircraft. In severe cases, it will even endanger the flight safety of the aircraft. How to solve the above problems is an urgent problem to be solved at present

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