Onboard automatic speed measuring and height measuring radar system and speed measuring and height measuring method

Abstract

The invention discloses an onboard automatic speed measuring and height measuring radar system and a speed measuring and height measuring method. The system comprises an antenna, a transmitter, a superhet receiver, a broadband digital intermediate-frequency receiver, a center computer and a power module. The transmitter generates four sawtooth wave linear frequency modulation radio-frequency signals and achieves space symmetric configuration through the antenna; the superhet receiver and the broadband digital intermediate-frequency receiver complete echo signal digital demodulation together and calculate the frequency, amplitude, phase and signal-to-noise ratio information of echo signals; the center computer separates the speed information and the height information of the same echo beam by applying Doppler principle directivity based on the space symmetry and the timing sequence relevance of four beams, and the information is used for calculating the flight speed value and the flight height value of an aircraft. According to the onboard automatic speed measuring and height measuring radar system and the speed measuring and height measuring method, the same radar can be used for automatically measuring the speed and the height, the structure of an aircraft avionics system is simplified, the measuring precision is high, and the onboard automatic speed measuring and height measuring radar system and the speed measuring and height measuring method can be used for measuring carrier aircraft flight parameters.

Description

technical field [0001] The invention belongs to the field of radio technology, and in particular relates to a radar system for measuring speed and height, which can be used for autonomously measuring the flight speed and relative ground flight height of a flight carrier aircraft simultaneously. Background technique [0002] The flying speed of the aircraft and the flying altitude relative to the ground are the key parameters for the navigation and flight control of the aircraft. At present, the autonomous measurement of the flight speed of the aircraft and the flight altitude relative to the ground is realized separately by the airborne Doppler speed measuring radar and the airborne radio altimeter radar. of. [0003] 1. Doppler speed radar speed measurement [0004] Doppler speed radar is a radar based on the principle of Doppler effect to realize the measurement of aircraft ground speed or each component of velocity vector. As we all know, when there is relative motion ...

AI Technical Summary

Problems solved by technology

[0026] Although the above two radars can realize the autonomous measurement of aircraft flight speed and flight altitude, different radar sensors need to be set up to realize the measurement of aircraft flight speed and flight altitude, which makes the structure of the aircraft avionics system complex and occupies the limited payload of the aircraft. It is inconsistent with the development direction of intensification, integration and multi-function of aircraft equipment

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