摘要
在火炮反面问题计算中,膛内时期平均压力p和时间t为表格函数。为了得到任意时间的炮膛合力以便求解二阶运动微分方程,传统方法采用手工描点、插值法等,误差相对较大,精度低。以某型号火炮pt表格函数为例,基于MATLAB软件,采用最小二乘法进行数值计算,得到任意时间的炮膛压力;同时找到拟合误差最小时的多项式次数n,为火炮反面问题计算和分析提供了依据和参考。
In the inverse question calculation of a gun,the functional relation between average chamber pressure and time is discrete.In order to achieve gun chamber＇s resultant force for solving second-order kinematic differential equation,plotting points by hand and interpolation method are used in the past,which have the bigger error and poor accuracy.Take a gun＇s pressure-time tabular function for example,the paper uses least square method to achieve the chamber pressure of a gun at any time by MATLAB and seeks out the fittest degree of polynomial with the least error.In the end,qualitative conclusions of reducing error are proposed,which provide the basis and reference for the gun＇s inverse question.
出处
《机械工程与自动化》
2016年第1期66-67,70,共3页
Mechanical Engineering & Automation
