两次步进预置北限幅设计

发布时间：2018-02-26 18:23

本文关键词： 陀螺经纬仪摆幅步进限幅快速寻北　出处：《光学精密工程》2014年12期 　论文类型：期刊论文

【摘要】：针对陀螺经纬仪存在限幅效率低的工程问题,设计了一种两次步进预置北限幅方案。介绍了传统步进限幅方法原理,分析了陀螺摆动平衡位与静摆零位的关系。将传统步进限幅法中的静摆零位跟踪更改为平衡位跟踪,通过两次步进使陀螺主轴摆动迅速限幅并以小摆角在真北附近运动。推导了两次步进转动角度及时刻的数学公式,分析了误差因素,并针对不同的摆幅和悬挂带扭转系数与陀螺力矩系数的比值进行了仿真运算。采用该方法改进了一个陀螺经纬仪的限幅,实验结果表明,该方法能在一个陀螺不跟踪摆动周期内完成限幅,限幅精度达到1′。提出的限幅方法保留了传统步进限幅法不需要增加系统硬件的优点;提高了限幅效率,满足工程应用对寻北时间和精度的要求。
[Abstract]:Aiming at the engineering problem of low limiting efficiency of gyrotheodolite, a two-step preset northern limit scheme is designed, and the principle of traditional step limiting method is introduced. The relationship between the balance position of gyroscope swing and the zero position of static pendulum is analyzed. By two steps, the gyroscope spindle oscillates rapidly and moves around the true north with a small swing angle. The mathematical formulas of the rotation angle and time of the two steps are derived, and the error factors are analyzed. The simulation calculation of the ratio of torsional coefficient of swing and suspension band to the coefficient of gyro moment is carried out, and the amplitude limit of a gyrotheodolite is improved by using this method. The experimental results show that, This method can limit the amplitude of gyroscope within a period of no tracking and swing, and the limiting precision is up to 1. The proposed method retains the advantage that the traditional step limiting method does not need to increase the hardware of the system, and improves the limiting efficiency. Meet the requirements of engineering application for the time and accuracy of north-seeking.
【作者单位】：西安高技术研究所;
【基金】：国家自然科学基金资助项目(No.41174162)
【分类号】：TH761.1

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