Altimeter simulator and simulation method thereof

Abstract

The invention discloses an altimeter simulator and a simulation method thereof. The simulator includes a pre-amplifier module, a post-amplifier module, a local oscillator module, a binary delay line switch matrix, a pre-mixer, a post-mixer, a link A first switch, a link A second switch, a link B first switch, and a link B second switch. The link A first switch and the link A second switch are connected to each other to form a first-stage highly simulated link A. The link B first switch and the link B second switch are connected to each other to form a second-stage highly simulated link B. Thealtimeter simulator and the simulation method thereof effectively reduce the simulation delay of ''absolute 0m'' of the altimeter simulator to reduce the simulation delay to 2.5 ns, thereby reducing actual simulation height corresponding to the ''absolute 0m'' to 0.375 m, effectively improves the height simulation precision of the altimeter simulator, makes the inspection of an altimeter more accurate and reasonable, and helps to improve the test accuracy of the altimeter.

Description

technical field [0001] The invention relates to the field of radio altimeter measurement, in particular to an analog altimeter simulator and an analog method. Background technique [0002] The radio altimeter is an essential device on an aircraft, it is used to measure the distance from the aircraft to the surface of the earth. The principle is that the transmitter and receiver of the radio altimeter are installed on the aircraft, and the altitude from the ground to the aircraft is determined by measuring the round-trip electromagnetic wave propagation delay time. The altimeter simulator is the key equipment for the comprehensive performance test of the radio altimeter, which can continuously simulate the echo signals of the radio altimeter at various altitudes, so as to complete the altimeter test. [0003] At present, there are mainly two types of altimeter simulators on the market, one is a digital altimeter simulator, and the other is an analog altimeter simulator. The...

AI Technical Summary

Problems solved by technology

The so-called "absolute 0 meters" means that when each altimeter simulator is set to 0, the analog signal has no delay in theory, but the actual analog signal in the simulator will have a certain delay time T due to devices and wiring, so that the altitude When the meter simulator tests the altimeter, due to the delay time T, the actual simulated height corresponding to the 0 value when testing the altimeter is always greater than 0m, and cannot reach the absolute 0m value

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