系统误差的不确定性与参数估计精度折合

考虑了系统误差的不确定性对参数估计精度的影响问题.建立了基于多源数据融合系统输入测元系统误差的状态空间及其分布,将参数估计精度转化为精度矩阵表示.讨论了一致误差模型和基于系统误差诊断的数据融合处理系统的精度函数,给出了数据融合处理精度评估的精度折合因子方法,建立了基于系统误差状态空间的精度评估理论和计算方法,该方法也可对不同数据融合处理模型的能力进行定量比较评价,计算分析和实际应用表明了该方法的适用性.

The Uncertainties of System Error and Conversion of Parameters Estimation Precision

This paper mainly considers the influence of system error uncertainties on parameters estimation precision. The state space with its distribution is established based on the input measurement elements of a multi-source data fusion system. The parameters estimation precision is then transformed into the precision matrix. The precision functions of a uniform error model and of a data fusion processing system based on system error diagnosis are discussed respectively. The method of precision conversion factors for the data fusion precision evaluation is presented, which can be used to establish the precision evaluation theories based on the system error state spaces and the corresponding computing method. Themethod can also be applied to the quantitive capability comparison and evaluation of various data fusion models. Simulation results and real calculations have shown the applicability of the method.