基于希尔伯特变换的信号解调算法及其在飞机供电特性参数测试系统中的应用

电压调制幅度、频率调制幅度和畸变频谱是对飞机机载电源系统供电特性参数进行测试时与信号调制相关的重要参数。为了更好地测试这些参数,提出了一种基于希尔伯特变换原理的数字解调算法,可以将采集的幅度或频率调制信号进行解调分析;同时,构建了一套飞机供电特性参数测试系统,将解调程序与硬件设备结合,通过程序控制数据采集卡对机载电源信号采样与解调分析;设计了实验对波形发生器产生的调制信号进行采样与解调,验证了该系统具有良好的效果,可以应用于飞机供电特性参数的测试中。

A Signal Demodulation Algorithm Based on Hilbert Transform and Its Application in Aircraft Power Supply System Characteristic Parameters Testing

In the test of aircraft power supply system s characteristic parameters,voltage modulation amplitude,frequency modulation amplitude and distortion spectrum are important parameters.A digital demodulation algorithm based on Hilbert transform was introduced to test these parameters,which can demodulate the sampling signal to get the modulation waveform.A characteristic parameters testing system for aircraft power supply was built to sample and analyze the aircraft power supply signal.An experiment was designed to prove that the testing system can meet the requirements of aircraft power supply testing.