摘要
分析了基于自整角机和旋转变压器的陀螺仪轴角测量原理,针对其信号特点,提出了一种利用模数转换的数字信号直接解调旋转角度的软件算法。首先采用整周期的最小二乘正弦拟合方法,计算粗精两通道内各组调制信号的幅值与相位,再根据幅值与相位信息计算对应的粗精角度,最后对粗精角度进行融合得到最终角度。实验与误差分析表明:所采用的算法能极大抑制误差的影响,提高测量精度。与传统的模拟式比对实验,测量结果相差不超过±2′。
The theory of gyroscope angle measurement based on synchro and resolver is analyzed.According to the characteristics of its signal,a software algorithm of directly demodulating the rotation angle using digital signal of analog-to-digital conversion is proposed.Firstly,the amplitude and phase of each group of modulation signals in the coarse and fine channels are calculated by using the least square sine fitting method of the whole period.Then the coarse and fine angles are calculated according to the amplitude and phase information.Finally,the final angle is obtained by fusing the coarse and fine angles.Experiments and error analysis show that the algorithm can greatly suppress the influence of errors and improve the measurement accuracy.Compared with the traditional simulation experiment,the difference between the measurement results and the traditional simulation experiment is not more than±2’.
作者
王选择
程斌
陈华
刘武平
翟中生
杨练根
WANG Xuanze;CHENG Bin;CHEN Hua;LIU Wuping;ZHAI Zhongsheng;YANG Liangen(Hubei University of Technology,Wuhan Hubei 430068,China;Key Laboratory of Modern Manufacture Quality Engineering,Wuhan Hubei 430068,China;Lingyun Science&Technology Group Ltd,Wuhan Hubei 430040,China)
出处
《传感技术学报》
CAS
CSCD
北大核心
2021年第3期379-384,共6页
Chinese Journal of Sensors and Actuators
