摘要
提出了摆式陀螺寻北仪双次积分测量方法。在粗寻北阶段采用步进法,通过施加外作用消耗系统原有机械能的方式实现快速寻北。在精寻北阶段采用双次光电积分法,通过对陀螺摆动的一个半周期做积分测量后,利用双次光电积分的方式得到陀螺摆动的平衡位置,然后,通过计算来获得子午面与陀螺轴向之间的夹角。进行了一系列相关实验,结果表明:双次光电积分法有效地改善了JT15试验样机的寻北测量精度,使由于测量周期变化造成的寻北误差减小了10倍以上。本方案缩短了摆式陀螺寻北仪的寻北测量时间,提高了寻北测量精度,满足了工程实用的精度和快速性要求。
An improved integral measuring method of pendulous gyroscope is developed to shorten the north seeking time and improve the measuring precision. On the rough north seeking stage, a step move method that is to consume the mechanical energy of gyroscopic pendulum by the outer action is used to realize the fast north seeking, and then, on the precise north seeking stage, a double photoelectric integral method is adopted to get the intersecting angle between the meridian plane：and the reference axis of gyro. The double photoelectric integral method gets the equilibrium position of gyro swing by one and a half periods integral calculating of measuring data and then makes use of the formula to compute the intersecting angle. The experimental results show that the double photoelectric integral method can effectively improve the measuring precision and decrease the integral error of measuring period variety; the integral error is less than one of tenth that in the traditional photoelectric integral method; and the scheme satisfies the engineering requirement of accuracy and speediness basically.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2007年第5期746-752,共7页
Optics and Precision Engineering
基金
国防重点项目基金资助
关键词
摆式陀螺
寻北
步进法
双次光电积分法
pendulous gyroscope, north seeking, step move method, double photoelectric integral method
