平台式惯导系统方位调制的转速优化  

Azimuth modulation rotating speed optimization of platform inertial navigation system

作　　者：王东升[1] 张海峰[1] 张园园[1] 仲岩[1] 宋健力[1] 史文[1] 

机构地区：[1]天津航海仪器研究所,天津300131

出　　处：《中国惯性技术学报》2013年第3期312-317,共6页Journal of Chinese Inertial Technology

基　　金：海装预研项目(101050601)

摘　　要：通过周期调制水平惯性组件误差,方位旋转调制技术有效地降低了水平陀螺漂移和加速度计零偏对系统工作精度的不利影响,提高了惯导系统的导航精度。研究了基于方位旋转的平台式惯导系统误差模型,推导了系统误差与主要误差源之间的解析表达式。在此基础上,详细分析了转速对速度误差、位置误差和航向误差等主要指标调制效果的影响。分析表明:当转速从30(°)/h增加到60(°)/h时,速度误差变大,位置和航向误差中的旋转周期振荡急剧减小,其中位置误差中的旋转周期振荡幅度减小了55.08%;但当转速超过60(°)/h时,位置和航向误差中的旋转周期振荡减小程度很小,效果微弱,而速度误差继续增大。综合考虑转速对三项误差参数的影响,方位调制转速取60(°)/h为宜。By periodicly modulating the errors of level inertial measurement unit, the azimuth rotating modulation technique can effectively suppress the adverse effect of level gyro drifts on the precision of inertial navigation. Through analyzing the error model of azimuth rotating-based platform inertial navigation system, the analytical expressions between systematic errors and main error sources are derived, and then the influence of rotating speed on modulation effect is analyzed. The analysis results show that： when the rotating speed increases from 30 （°）/h to 60 （°）/h, the velocity error will increase, and the periodic oscillation of position and course errors decrease sharply, with the position error oscillation reduces by about 55.08%;However, when the rotating speed is faster than 60 （°）/h, the periodic oscillations of position and course have little decrease, but the velocity error continues to increase. Through comprehensive analyzing the modulation effects on velocity, position and course, it is shown that 60 （°）/h is the most reasonable rotating velocity for the azimuth rotating platform inertial navigation system.

关 键 词：旋转调制技术 平台式惯导系统 转速优化 误差分析 

分 类 号：U666.1[交通运输工程—船舶及航道工程]