陀螺寻北仪粗寻北新方法——角加速度计算法

摘要

为了实现摆式陀螺寻北仪的大偏北角粗寻北,文中分析了陀螺灵敏部大偏北角运动方程,在最大速度检测法的基础上提出一种新的粗寻北方法——角加速度计算法.文中首先对仪器设置大偏北角的粗寻北试验,然后使用低通滤波对粗寻北阶段陀螺速度信号进行处理,最后建立跟踪微分器求得角速度的微分信号即角加速度,代入公式求出粗寻北结束时壳体的偏北角,并对角加速度计算法的结果进行精度分析.试验结果表明,角加速度计算法精度为6.03″,精度较好,能够实现大偏北角粗寻北,具有良好的工程实践性.%In order to realize the pendulous gyroscope in large azimuth of the coarse north finding,this paper analyzed the gyro sensitive parts in large azimuth motion equation based on the maximum speed on the detection method,a new rough north seeking method-angular acceleration calculation method was proposed.Firstly,this paper set instrument coarse north finding test in large azimuth,then a low-pass filter was used to process the coarse north seeking gyro stage speed signal,and then the tracking differentiator was used to obtain angular acceleration,and the result was put into the formula of angle position and coarse search after the end of the true north.The results show that the tracking speed detection method's precision is 6.03″which is good.It can be used to find the north of the north and has good engineering practice.