基于加速度计的陀螺三轴角速率提取算法研究

Research on the signal extraction algorithm of the triaxial angular rate of gyroscope based on accelerometer

旋转弹载免驱动三轴MEMS陀螺的输出信号是横滚、偏航、俯仰3个角速度耦合在一起的特殊信号,如何解出弹体的3个角速度是研究的重点和难点。为解决这一问题,从旋转弹载免驱动三轴MEMS陀螺结构原理出发,分析了其输出信号。针对信号的特殊性,提出通过用重力加速度计的输出信号和陀螺的输出信号进行对比的方法来实现陀螺的三轴角速度的提取,并用M atlab对这种方法进行仿真分析,结果表明:用这种方法能够提取出陀螺的三轴角速度信号。

Because the free-drive triaxial MEMS gyroscope used in spinning projectiles is the single-chip gyroscope,the output signal contains roll,heading and pitch angular rates.It is necessary to analyze the output signal for the extraction of the three angular rates.To solve this problem,a corresponding mathematical module is established based on the structural principle of the gyroscope and the output signal of the gyroscope is analyzed.By analyzing the signal,the signal extraction algorithm based on FFT transform is introduced and simulated with Matlab.The results show that the algorithm can extract roll,heading and pitch angular rates of the gyroscope.