一种过载控制辅助实现快速估算滚转角的方法  

A Method for Estimating Initial Roll Angle Combined with Overload Control

作　　者：孙友[1] 路遥 赵耀[1] 吴广[1] Sun You;Lu Yao;Zhao Yao;Wu Guang(Beijing Aerospace Automatic Control Institute, Beijing 100854, China)

机构地区：[1]北京航天自动控制研究所,北京100854

出　　处：《航天控制》2018年第2期25-29,共5页Aerospace Control

摘　　要：针对基于GPS/INS组合导航系统的制导炮弹发射空中加电后,滚转角求取过程中受外界环境及风场等因素影响较大的问题,提出一种利用GPS定速信息和惯性测量组件(IMU)的输出信息快速求取滚转角的方法。推导了算法,分析了影响滚转角计算精度的噪声因素,借助过载控制策略有效提高滚转角计算过程中的信噪比和算法的适应性。仿真验证该方法在各项随机风和常值风的影响下误差均小于4°。计算误差不随时间累积,实现简单可靠,环境适应性和工程应用性更强,能够满足空中对准精度要求。According to the problem that the estimation accuracy of the roll angle is always affected by the random wind and other environment factors when a guided projectile based on GPS/INS system is fired. A new method is proposed,which utilizes GPS and inertial measurement unit information to calculate the initial roll angle. The factors of estimation errors are analyzed in detail. The signal-to-noise and adaptability of the method are improved by means of overload controlling. The results of a hardware in loop simulation show that the estimated errors are less than 4°under different typical leaves of measurement and flight conditions. The error of this method can not be cumulated by time. It is more adaptable to be used to estimate the roll angle during in-flight realignment.

关 键 词：过载控制 滚转角 算法 

分 类 号：V448.22[航空宇航科学与技术—飞行器设计]