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GPS/INS组合制导弹药空中对准的初始滚转角估计新算法
引用本文:余浩平,杨树兴,倪慧.GPS/INS组合制导弹药空中对准的初始滚转角估计新算法[J].兵工学报,2011,32(10):1265-1270.
作者姓名:余浩平  杨树兴  倪慧
作者单位:(1.北京理工大学 飞行器动力学与控制教育部重点实验室, 北京 100081;2.中国兵器科学研究院, 北京 100089)
基金项目:国防基础科研项目(B2220060060)
摘    要:GPS/INS组合制导弹药从常规平台发射后需要在空中重新对准时,滚转角的初值难以获得.为解决该问题,分别针对弹体倾斜稳定和低速旋转两种情况,提出了估计初始滚转角的新算法.从姿态运动学方程出发,推导了弹体滚转角与横向角速率、姿态角速率之间的关系式,利用角速率陀螺测量值和GPS的速度测量值,基于最小二乘估计方法,可获得滚转...

关 键 词:飞行器控制、导航技术  制导弹药  惯性导航系统  空中对准  滚转角

New Algorithms to Estimate Initial Roll Angle for In-flight Alignment of GPS/INS Guided Munitions
SHE Hao-ping,YANG Shu-xing,NI Hui.New Algorithms to Estimate Initial Roll Angle for In-flight Alignment of GPS/INS Guided Munitions[J].Acta Armamentarii,2011,32(10):1265-1270.
Authors:SHE Hao-ping  YANG Shu-xing  NI Hui
Affiliation:(1.Key Laboratory of Dynamics and Control of Flight Vehicle, Ministry of Education, Beijing Institute of Technology,Beijing 100081, China; 2.Science Research Institute of China-North Group Company, Beijing 100089, China)
Abstract:When GPS/INS guided munition needs in-flight realignment after it is fired from a conventional platform,an initial roll angle is difficult to be acquired.To solve this problem,two new algorithms of initial roll angle were proposed with regard to the non-spin and low-speed spin of projectile.The relationships between the roll angle and the transverse angular rates and attitude angle rates were derived from attitude kinematics equations.The measured values of angular rate gyroscopes and GPS velocity were used to obtain optimal estimation of roll angle based on least squares estimation.Simulation results and performance analysis show that the random and constant wind during flight are the main factors affecting estimation accuracy.The estimated errors are less than 3° under different typical levels of measurement and flight conditions.The algorithm can be used to estimate the roll angle during in-flight coarse alignment.
Keywords:control and navigation technology of aircraft  guided munition  inertial navigation system  in-flight alignment  roll angle
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