数值形状变权融合的制导系统仿真可信度评估

Credibility Evaluation for Guidance System Simulation Fusing Numerical Similarity and Shape Similarity with Variable Weight

研究制导系统动态仿真结果可信度评估,针对相似度方法在工程应用中的问题,综合数值特征和形状特征,提出了分段变权的数值相似度和形状相似度二者融合的仿真可信度评估方法;首先,将动态仿真结果划分为关键时间区域和非关键时间区域,提出了非齐次指数加权和幅值加权相结合的相似度权函数;然后,用新的权函数按区域分别计算数值可信度和形状可信度,并对二者进行融合,给出综合相似度;最后应用实测数据进行了验证;实践表明,此方法仿真评估结果更可信。

Credibility evaluation of dynamic simulation result in guidance system was researched. Consid- ering the engineering problems that similarity degree method was faced, an improving similarity degree method combined with numerical similarity and shape similarity based on variable weight was presented. Firstly, the dynamic simulation results were divided into important region and unimportant region, and the un-homogeneous exponential operator as well as the linear operator related to instantaneous amplitude was utilized to different region. Then, the similarity degree values including numerical similarity and shape similarity were calculated with new weight function in respective sequences, and the comprehensive simi- larity degree was achieved by fusing numerical similarity and shape similarity. Finally, the method was verified through actual measurement data. Practice proves that the improved method can give more credita- ble evaluation result.