用累加弦长三次参数样条方法处理内弹道实验数据

PROCESSING OF TEST DATA IN INTERIOR BALLISTICS WITH THE CUMULATIVE CHORD CUBIC SPLINE METHOD

本文利用累加弦长三次参数样条的方法对内弹道中实测压力、时间数集进行了处理.给出了C^2级连续的p-t、I-Ψ和P—Ψ曲线的分段解析表达式.大大地提高了计算精度.据此绘出的上述各条曲线与常规方法绘出的曲线作了比较.为P-t曲线的数据处理提供了新的数学计算方法,得到了令人满意的结果。

The cumulative chord cubic parameter spline method is used in processing of the pressure andtime data measured in interrior ballistics, and the segmented analytic relaionships with the C^2 --ordercontinuity for the p-t, I--ψ and Γ--ψ curves are given in this paper. This new mathematical method ofprocessing the p--t curves makes the calculation precise increase highly. The comparison between curvesobtained with this method and curves given by the traditonal method shows satisfactory