摘要
为解决无驱动陀螺输出信号中干扰噪声较大的问题,考虑对陀螺信号进行数字滤波处理。根据陀螺输出信号的特点推导了无驱陀螺信号的频谱函数表达式,确定信号的频谱特点。分析了加窗截断对其频谱的影响,并对采集的信号在不同宽度的矩形窗下做快速傅里叶变换验证了所得结果。根据实际使用中无驱陀螺信号的有用频带位于低频段的特点,利用MATLAB设计低通滤波器进行滤波处理,滤波后效果较好。
To solve the problem of output signal interference noise of non-driven gyroscope,digital filtering is considered on the gyro signal.The spectrum function expression of non-driven micro-gyroscope is derived.The impact of rectangular window on its spectrum is analysed followed by experiment to test and verify the results.Finally,based on the characteristics that the useful frequency band of gyro signal lays in the low frequency one,a low-pass filter is designed by using MATLAB.
出处
《北京信息科技大学学报(自然科学版)》
2012年第2期59-62,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(60971024)
北京市自然科学基金资助项目(4112020)
关键词
微机械陀螺
频谱分析
滤波
micromachined gyroscope
spectrum analysis
filtering