摘要
为了提高陀螺仪的测试精度,研究了陀螺仪伺服法测试技术,深入分析了伺服法测试的误差源以及误差源对测试结果的影响,并完成了高精度液浮陀螺仪的伺服法实验.针对实验数据中的噪声信号,提出了改进的小波阈值滤波方法.仿真和实验结果表明:该方法与FFT(Fast Fourier transform)滤波方法相比,估计精度显著提高;与小波通用阈值滤波方法相比,该方法计算量小,而且解决了通用阈值的"过扼杀"现象.
In order to improve measurement-precision of the gyro,the gyroscope experiment is completed based on gyroscope servo technology.The error sources of gyroscope servo technology are analyzed in process of measurement, and the impact of these error sources on measurement is evaluated.To eliminate interference signal existing in the sampled data of the measurement,a modified wavelet threshold filtering method is proposed.The results of the simulation and measurement show that,the estimation-precision of the proposed method is improvemented remarkably compared with the fast Fourier transform（FFT） method,and the calculation work is reduced compared with the conventional wavelet threshold filtering methods,furthermore,the phenomenon of a common threshold of＂killing＂is solved thoroughly.
出处
《控制与决策》
EI
CSCD
北大核心
2010年第5期681-685,共5页
Control and Decision
基金
国家安全重大基础研究项目(973-61334)
关键词
伺服法
误差源
阈值滤波
过扼杀
Servo method
Error sources
Threshold filtering
Killing
