飞机变频交流电源供电特性频率瞬变参数测量方法研究

Study of Method for the Frequency Transient Parameter Measurement of Aircraft Variable Frequency AC Power Supply Characteristic

针对飞机变频交流电源供电特性频率瞬变参数,对比了基于小波变换和希尔伯特变换的瞬变频率分析方法,结果表明,在降低噪声影响的情况下,基于希尔伯特变换的方法可以获得更好的瞬变时刻和瞬变时刻前后的频率准确度.最后,提出一种基于滤波算法和希尔伯特变换算法的瞬变频率测量方法,结果表明,上述方法得到的瞬变时刻误差为-0.10%,瞬变时刻前后的频率值误差为0.03%.

According to the frequency transient parameter of aircraft variable frequency AC power supply characteristic,the transient frequency analysis methods based on wavelet transformation and Hilbert transformation were compared.The results show that the method based on Hilbert transform can obtain better accuracy of the transient time and the frequencies before and after the transient time under the condition of reducing the influence of noise.Finally,a new method based on filtering algorithm and Hilbert transform was proposed.The results show that the error of transient time is 0.03%,and the error of frequencies before and after the transient time is-0.10%.