基于改进证据理论的时频一致性检验方法研究

Study on Time-frequency Conformance Test Method Based on Improved Evidence Theory

针对武器装备系统动态数据的有效性检验,提出了一种基于改进证据理论的时频方法结合的仿真动态一致性检验方法 ,根据规则合成,实现了动态数据的综合一致性检验过程。该方法首先在时域内运用经典的灰色关联方法和距离检验方法检验了仿真数据的一致性,然后在频域内运用经典的窗谱估计方法对仿真动态数据的一致性进行了检验,最后针对DS证据理论中存在的问题,提出了一种基于修正冲突证据的DS证据理论改进方法 ,确定冲突证据予以修正和重新组合,从而获得动态仿真数据一致性检验的综合结果。通过对飞行纵向短周期运动中俯仰角数据的分析,验证了该方法的可行性。

Aiming at the inspection effectiveness inspection of weapon equipment system dynamic data,this paper proposes a theory of evidence based on the improved time-frequency method combining with the simulation method of dynamic consistency check,according to the rules of the synthesis,the comprehensive dynamic data consistency check process is implemeted. This method firstly tests the consistency of simulation data in the time domain by using the classic gray correlation method and distance testing method,and then tests the simulation of the dynamic data consistency by using frequency domain using classical window spectrum estimation method.Finally,aiming at the problems existing in the DS evidence theory, this paper proposes a modified DS evidence theory of conflict evidence based method,determines the conflict evidence to be corrected and recombination,thus a comprehensive result of dynamic simulation data consistency check is obtained.The feasibility of this method is verified by the analysis of the pitch angle data in the flight longitudinal short period motion.