微机械石英音叉陀螺作为车载稳向系统中速度反馈元件, 其输出噪声和随机漂移直接影响到了最终的稳向精度。针对此种问题, 提出了对陀螺噪声采用自适应前向预测滤波的方法来进行消除, 并根据光栅的角度值与初始稳向角度值的误差来设置一个递增或递减的变量引入到速度闭环系统中。通过实际测试证明, 采用此方法可以将稳向精度提高到[±7.2]之内, 从而验证了方法的有效性。

Micro-machined quartz tuning fork gyroscope as the speed feedback system in vehicle steering system, its output noise and random drift directly affect the final stable precision. In response to this problem, an adaptive forward predictive filtering method is proposed to eliminate gyro noise, and an incremental or decreasing variable is introduced into the velocity closed loop system according to the error of the angle value of the grating and the initial stable angle. The actual tests verify that the method can improve the stable precision to±7.2″, which verifies the effectiveness of the method.