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针对某型飞机地面试验时发现的问题,研究并设计了一种能处理交流信号波形不连续时的频率计算方法。使用Genesis数据记录仪采集数据,能在试验现场高速同步地对测试信号进行采集。借助LabVIEW强大的数字信号处理能力,对定义的3种信号断续情况进行频率计算和趋势图描绘。试验结果表明,频率趋势图符合被测信号变化规律,数据可靠,达到了设计要求。
Aiming at the problems found on the ground test of a certain type of aircraft, a method of calculating the frequency when dealing with the discontinuity of the AC signal waveform is studied and designed. Using the Genesis data logger to acquire data, the test signal can be collected at high speed and simultaneously on the test site. With LabVIEW’s powerful digital signal processing capabilities, frequency definitions and trend plotting are performed on the three defined signal discontinuities. The test results show that the frequency trend of the signal in line with changes in the measured signal, reliable data, to meet the design requirements.