基于数值及形状相似度的火炮动力后坐模拟准确度评估

摘要

Gun-power-recoil test machine is a new-fashioned recoil simulation test machine with a high-speed mass impacting the muzzle of a gun to promote gun recoil.In order to analyze the recoil simulation accuracy of the test method, through actual firing tests and simulation firing tests based on the test machine,the gun's recoil displacement and recoil velocity time series under the two firing conditions were obtained.The numerical value similarity was characterized by the weighted average value of relative error of time series.Shape similarity was calculated by curvature distance of time series. The shape similarity was calculated with the curvature relative error of time series.The comprehensive similarity was calculated based on the multi-index evaluation theory,and the recoil simulation accuracy of the test machine was evaluated.The study results provided a theoretical basis for the application of the gun-power-recoil test machine in the target.%火炮动力后坐试验装置通过高速冲击头撞击炮口推动火炮后坐，为新型后坐模拟试验方法。为分析该试验方法模拟后坐的准确度，通过实弹射击试验及基于试验装置的模拟射击试验，获取两种射击条件下后坐位移及速度时间序列；用时间序列相对误差的加权均值表征数值相似度，据时间序列曲率误差值求取形状相似度，据时间序列的曲率距离法求取形状相似度，并基于多属性指标评价理论计算综合相似度，进而对试验装置的后坐模拟准确度进行评估。该研究可为试验装置用于靶场试验提供理论依据。