旋转弹载免驱动三轴MEMS陀螺的信号提取算法

The Research on Signal Extraction Algorithm of Free-drive Tri-axial MEMS Gyroscope used in Spinning Projectiles

旋转弹载免驱动三轴MEMS陀螺的输出信号是滚转、偏航、俯仰三个角速度耦合在一起的特殊信号,需要对其输出信号进行分析才能解出弹体的三个角速度。为解决这一问题,文中从旋转弹载免驱动三轴MEMS陀螺结构原理出发,建立陀螺运动的动力学数学模型并对其进行了分析,提出通过对陀螺的输出信号作FFT变换方法来实现陀螺的三轴角速度的提取,并用MATLAB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横滚、俯仰和航向角速度信号。

The output signal of free-drive triaxial MEMS gyroscope used in spinning projectiles contains rolling,yawing and pitching 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 model was established based on the structural principle of the gyroscope and the output signal of the gyroscope was analyzed.By analyzing the signal,the signal extraction algorithm based on FFT transform was introduced and simulated with MATLAB.The results show that the algorithm can extract rolling,yawing and pitching angular rates of the gyroscope.