Flight control system testing device

Abstract

The invention discloses an air vehicle fly-by-wire flight control system testing device. The testing device is composed of a hardware system and a software system. The hardware system is composed of a lower computer and an upper computer; the lower computer comprises an excitation signal output hardware module, a control plane response signal acquisition hardware module, a sensor response signal acquisition hardware module, a data transmission bus, a lower computer controller and the like and mainly achieves functions such as digital excitation signal generation, response signal acquisition and signal analysis and calculation; the upper computer comprises a testing state communication hardware module and a human-computer interaction computer and achieves a human-computer interaction function. The software system is developed on the basis of a virtual instrument technique, fully inherits an open system architecture of a mature virtual instrument development system and is convenient to maintain and upgrade. The testing device has the advantages that the testing device and a flight control computer are directly connected through a multi-redundancy digital bus, the problems of signal amplitude attenuation, waveform distortion and the like are avoided, and the accuracy of a testing result is improved.

Description

technical field [0001] The patent of the present invention relates to an aircraft flight control system test device, specifically, a test device based on virtual instrument technology that can be used for time domain response and frequency response tests of aircraft fly-by-wire flight control system. Background technique [0002] The time domain response and frequency response test of the fly-by-wire flight control system is a routine ground test before the flight test of the aircraft, including the ground time domain response test, stability reserve test, etc. The dynamic characteristics of the system are evaluated. [0003] At present, most of the time domain and frequency response tests of the fly-by-wire flight control system use the frequency response analyzer to generate the flight control system sweep frequency excitation signal, and at the same time collect the response signal of the flight control system, and obtain the flight control system through the frequency re...

AI Technical Summary

Problems solved by technology

During the test, the system tester, analog / digital conversion device and digital / analog conversion device are required to realize the signal cross-linking between the frequency response analyzer and the flight control computer, which makes the cable connection between the test devices more complicated, causing signal attenuation, waveform distortion and Signal noise, reducing the signal-to-noise ratio of the collected signal during the test process, resulting in a decrease in the accuracy of the test results

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