摘要
为克服目前国内摆式陀螺寻北仪难以实现全方位寻北的不足,通过对其大偏北角运动规律的分析提出了一种基于周期-摆幅测量的全方位快速预定向方法,通过测量摆动周期和摆幅计算偏北角;分析了转子转速对预定向时间的影响,以及各参数误差对预定向精度的影响,并对提出的方法进行了初步试验验证。理论分析和试验结果均表明,通过降低转子转速可以有效缩短摆动周期,在65 s内实现全方位预定向,精度在5°以内,满足后续寻北过程的精度要求。
A novel omni-bearing pre-orientation method based on period-amplitude measuring is put forward through the analysis of motion characteristics of pendulous gyro north seeker in wide azimuth. The proposed method can be used to calculate the azimuth of the gyro shaft by measuring its swing period and amplitude. The effect of gyro-motor rotating rate on pre-orientation time is analyzed, the effect of perti- nent parameter errors on pre-orientation accuracy is discussed, and the preliminary experiments are con- ducted to verify the new method. Both the theoretical and experimental results show that the swing period can be shortened by decreasing the rotating speed of the gyro-rotor, and the rapid pre-orientation can be achieved accordingly within 65 s with the accuracy of higher than 5~, which can meet the accuracy requirement of subsequent north seeking procedures.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2015年第8期1458-1465,共8页
Acta Armamentarii
基金
国家自然科学基金项目(41174162
41404022)
关键词
兵器科学与技术
摆式陀螺寻北仪
大偏北角
全方位寻北
周期-摆幅测量
ordnance science and technology
pendulous gyroscope north seeker
wide azimuth
omnibearing north-seeking
period-amplitude measuring
