基于小波理论的电传飞机飞控系统试飞数据预处理

Preprocessing of Flight Test Data for Flight Control System of Fly-by-wire Airplane Based on Wavelet Theory

随着科技的不断发展,电传控制已成为民用客机的标配。为验证电传飞机满足适航条款及航行运营需要,民用飞机申请人需采用不同的验证手段,其中,试飞是非常重要的验证手段之一。飞行控制系统作为飞机的重要子系统,其试飞主要验证飞行控制系统的功能及性能等。而试飞数据作为验证适航条款的依据,经常受到噪声污染。同时,试飞时还会受到气流等干扰因素影响,严重影响飞控系统的性能验证。基于小波理论,消除了试飞数据中的噪声。试验结果表明,经数据处理后的试飞数据完美验证了飞行控制系统的性能。

Fly-by-wire control system has been recognized as the standard configuration of commercial airplane. As a regulation of CCAR, the designer of airplane should demonstrate that the airplane is in accord with the airworthiness of CCAR using different methods. Flight test is one of the most efficient methods for the demonstration of airworthiness. Flight test of the flight control system （FCS）, which is one of the most important systems for airplane, is usually used to demonstrate the function and performance of FCS. However, flight test data is usually influenced by the noise and other factors （i.e., the turbulence）, which will dramatically reduce the efficiency of flight test. The wavelet theory is introduced to eliminate the noise, and the results have shown that the proposed algorithm can demonstrated the performances of FCS efficiently.