NC programs with the same steps for noncircle curves of a workpiece are of too many sections and difficult to input and debug, which affects the efficiency of a NC machine tool.
在数控机床上对非圆轮廓曲线进行加工时，按等步长进行节点计算编写出的加工程序通常段数多，给程序的输入与调试带来困难，直接影响机床的使用效率。
Then fitting the deviation in calculated fitting circle and cam profile curves, the remaining arcs were gotten. Finally the whole circle fitting and NC programming were realized.
再根据所计算的拟合圆与凸轮曲线的偏差用最小二乘法拟合以得到其余各圆弧段；
The results show that the crook of these propellants burning curves were caused by the difference of thermal decomposition behavior between the solid filler RDX and NC-NG double-base binder.
试验结果表明：NC、NG组成的双基粘合剂与固体添加物rdx在热分解特性上的差异是导致硝胺发射药燃速曲线转折的原因。
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