基于FFT频率插值法的载体驱动陀螺自旋频率解调  

Spin frequency demodulation of carrier driven gyroscope based on FFT coefficient frequency interpolation method

作　　者：赵海肖 张伟[1] 王凌[1] 田文杰[1] 张福学[1] 

机构地区：[1]北京信息科技大学传感技术研究中心,北京100101

出　　处：《北京信息科技大学学报（自然科学版）》2015年第5期12-15,共4页Journal of Beijing Information Science and Technology University

基　　金：国家自然科学基金资助项目(61372016);北京市自然科学基金重点资助项目(B类)(KZ201511232037);北京市教委科技计划项目(KM201411232021);北京市传感器重点实验室开放课题资助项目

摘　　要：为了精确解调载体驱动陀螺自旋频率,提出了一种基于快速傅里叶变换（Fast Fourier Transformation,FFT）系数实部和虚部相结合的频率插值算法。通过使用代码编译软件对信号发生器模拟的陀螺信号进行自旋频率的解调和误差分析,其中频谱检测算法的最大相对误差为2.53%,FFT系数频率插值算法的最大相对误差为0.1%。对三轴精密转台实时测试的陀螺信号进行了自旋频率的解调和误差分析,其中频谱检测算法的最大相对误差为2.33%,FFT系数频率插值算法的最大相对误差为0.1%。实验结果表明,与频谱检测算法相比,FFT系数频率插值算法的解调精度更高,最大相对误差减小了2.23%~2.43%,且易于硬件实现。In order to accurately demodulate the spin frequency of the carrier driven gyroscope,a new method of frequency interpolation algorithm based on FFT coefficients is proposed. The spin frequency demodulation and error analysis are made for gyro signal simulated on signal generator by using of CCS. The spectrum detection algorithm of maximum relative error is 2. 53%,while the maximum relative error of the frequency interpolation algorithm for the FFT coefficient is 0. 1%. The spin frequency of gyroscope signal is tested real-time by three-axis precision turntable and the error is further analyzed.The spectrum detection algorithm of maximum relative error is 2. 33%,the maximum relative error of the frequency interpolation algorithm for the FFT coefficient is 0. 1%. Experimental results show that compared with the spectrum detection algorithm,the demodulation precision of the FFT coefficient frequency interpolation algorithm is higher; the maximum relative error decreases from 2. 23% to 2. 43%with easy hardware implementation.

关 键 词：载体驱动陀螺 自旋频率解调 FFT系数频率插值法 频谱检测法 

分 类 号：TN710[电子电信—电路与系统]