摘要
针对某型导弹测试设备电路板频率信号的精确测量问题,采用虚拟仪器技术,介绍了一种基于离散傅里叶变换(DFT)的交流信号频率测量方法,并针对其存在的不足推导出了精度更高的自适应递推傅氏测频算法。应用虚拟仪器技术对上述测频方法进行分析比较,实验结果表明,递推傅氏测频算法消除了DFT的栅栏效应,抗干扰性好,测量误差小于0.01 Hz,测量精度得到很大提高。
A virtual instrument technology is used to design the AC signal frequency measurement method based on Discrete Fourier Transform （DFT）for solving the accurate measurement of frequency signal circle of some missile test equipment. Then a more precise derivation of adaptive recursive Fourier algorithm for frequency measurement is proposed. It shows that the adaptive recursive Fourier algorithm eliminates the barrier effect of DFT, anti-jamming performance, measurement error range is less than 0.01Hz, and measurement precision has been improved greatly through analysis and comparison of the experiments on the two algorithms.
出处
《现代电子技术》
2010年第22期172-174,177,共4页
Modern Electronics Technique
