基于加速度测试及模糊模型的弹丸侵彻混凝土深度实时预测方法

为了对卵形弹垂直侵彻半无限厚混凝土目标的侵深进行实时预测,提出了一种基于实测加速度值及模糊模型的计算方法。该方法根据瞬时速度的不同将侵彻过程分成了高速侵彻、中速侵彻和低速侵彻三个阶段,并分别采用不同的模型对每个阶段的减加速度、速度和侵彻深度进行了描述。通过判断减加速度的计算误差,自动确定了高速侵彻阶段与中速侵彻阶段以及中速侵彻阶段与低速侵彻阶段的截点速度。同时,利用实测的全弹道加速度曲线,实时计算了侵彻过程的初始冲击速度。将实验后所测得的侵彻深度与模型预测的侵彻深度进行比较,结果表明该预测方法可以对侵彻深度进行准确地实时计算。

Real-time predicting penetration depth of projectiles into concrete targets based on acceleration measurement and fuzzy model

In order to predict the real-time penetration depth of all ogive-nose projectiles into concrete targets,a new method was developed based on the acceleration data measured in penetration tests with ogive-nose projectiles into semi-infinite concrete targets.With the proposed method,the whole penetration process was divided into three stages with instantaneous velocity,and each stage was described with different models.Through judging the calculation error,threshold velocities between stages were automatically determined.At the same time,the initial striking velocity of a penetration process was calculated by using the measured acceleration curve on the whole trajectory.It was shown that the predicted values with the proposed method are in reasonably good agreement with the measured data from tests.