文章摘要信息 关键词 ： 蒙皮;数控拉形;位移加载;数值模拟 [gap=893]Keywords : aircraft skin;NC stretch forming;displacement loading;numerical simulation
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研究积分分离PID控制算法，用来控制根据位移加载的试验过程；
PID arithmetic by which the loading process of displacement system is controlled is successfully adopted in two control systems.
文中建立了张力动态位移加载模型，并在大型程序（EPFEP3）中得以实现。
In the apprcach a dynamic tension establishing model is obtained, and is carried out in program 'EPFEP3'.
在基于切线刚度的位移加载控制法基础上进行改进，采用基于割线刚度的位移加载控制方法，并绘制了相应框图。
Through improving the displacement loading control method based on the tangent stiffness, this paper has presented displacement loading control method based on the secant stiffness.
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