加速度计寻北系统的设计及关键技术研究  

Design and critical technologies of an accelerometer north-seeking system

作　　者：赵岩[1] 翟百臣[1] 武克用[1] 陈涛[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所

出　　处：《电光与控制》2005年第5期66-69,89,共5页Electronics Optics & Control

摘　　要：研究了基于哥氏效应的加速度计动态寻北系统的原理及其关键技术。该系统的工作机理与传统的陀螺寻北定向系统有很大的差异。两个加速度计按照严格的位置规定安装在高速旋转的转台上,一个用于测量地球自转的北向分量,另一个用于转台的调平装置。用快速多位置采样法及多周期信息处理技术,可以有效地改善系统的信噪比及系统偏差。为了满足系统控制精度的需要,选用了锁相控制技术,并进一步研究了其工作机理及具体的实现方法。随着低成本加速度计性能的不断完善,这种加速度计寻北系统将会取得更加优异的性能,并适合于更多领域的需要。The principle of a novel-accelerometer dynamic north-seeking system based on Coriolis effect and the key factors that have influence to the system are studied. The working mechanism of the system is quite different from that of the common gym north-seeking orientating system. Two accelerometers are rigidly mounted on a high-speed rotating table. One is used to measure the North component of earth rotation, and the other is used as the horizontal adjusting device of the table. Using mtdti-position rapid sampling and multi-period information processing techniques, the signal-to-noise ratio of the system is effectively improved, and the systematic deviation is decreased greatly at the same time. To satisfy the requirement of system control precision, phaselocked control technology is proposed, and the working mechanism and the realization method are studied in detail. This dynamic north finder is mainly applied in military fields in nowadays. With the performance improving of low-cost accelerometers, the function of the north finder designed in the paper will be better, and be applicable to many fields.

关 键 词：加速度计 寻北系统 哥式效应 锁相控制 

分 类 号：V249.3[航空宇航科学与技术—飞行器设计] TH824.4[机械工程—仪器科学与技术]