摘要
在地心地固(ECEF)坐标系下,推导了传感器测量系统误差的状态方程和测量方程;从线性时变系统能观性理论引出了系统误差可观测性定义,并给出了可观测性的度量方法;讨论了两种典型的低可观测情况,并根据各自特点提出了相应的解决方法。最后,用一个案例仿真证明了相关结论。
State equations and measurement equations for system errors of the sensors measure- ment are deduced in the earth-centered earth-fixed （ECEF） coordinate system and the observabil- ity definition for system errors is given by using the observability theory of the linear time-vary- ing control system. In addition, the measurement method for the observability is obtained. Then, two typical situations with low observability are discussed and algorithms for the system errors are proposed. Finally, a simulation experiment proves the conclusion.
出处
《指挥信息系统与技术》
2012年第1期54-58,共5页
Command Information System and Technology
关键词
空间配准
系统误差
可观测性
病态矩阵
spatial registration
system error
observability
illness matrix
