A fast and accurate frequency estimation algorithm for sinusoidal signal with harmonic components

作者：Hu, Jinghua; Pan, Mengchun; Zeng, Zhidun; Hu, Jiafei^*; Chen, Dixiang; Tian, Wugang; Zhao, Jianqiang; Du, Qingfa

来源：Review of Scientific Instruments, 2016, 87(10): 105002.

DOI：10.1063/1.4963857

• POWER-SYSTEM FREQUENCY
• REAL
• INTERPOLATION
• FOURIER
• DFT
• PARAMETERS
• PHASORS

Frequency estimation is a fundamental problem in many applications, such as traditional vibration measurement, power system supervision, and microelectromechanical system sensors control. In this paper, a fast and accurate frequency estimation algorithm is proposed to deal with low efficiency problem in traditional methods. The proposed algorithm consists of coarse and fine frequency estimation steps, and we demonstrate that it is more efficient than conventional searching methods to achieve coarse frequency estimation (location peak of FFT amplitude) by applying modified zero-crossing technique. Thus, the proposed estimation algorithm requires less hardware and software sources and can achieve even higher efficiency when the experimental data increase. Experimental results with modulated magnetic signal show that the root mean square error of frequency estimation is below 0.032 Hz with the proposed algorithm, which has lower computational complexity and better global performance than conventional frequency estimation methods. Published by AIP Publishing.

• 出版日期2016-10
• 单位太原理工大学; 中国人民解放军国防科学技术大学