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060610411_王鹏_数控课设DL2.doc

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060610411_王鹏_数控课设DL2

《机床数控技术》课程设计说明书班级：0506106 学号：060610411 姓名：王鹏指导教师：王宏涛时间：2010年1月地点：明故宫校区计算中心目录课程设计要求··································································2 DDA法直线插补····························································2 算法描述·············································································2 变量说明·············································································2 插补流程图··········································································2 实现情况·············································································4 逐点比较法圆弧插补······················································4 算法描述··············································································4 变量说明··············································································4 插补流程图···········································································4 实现情况··············································································6 程序界面···········································································6 总结与体会·······································································7 附录——程序源代码·······················································7 参考文献···········································································23 课程设计要求 DDA法插补第二象限直线；逐点比较法插补3~4象限逆圆弧；具有数据输入界面，如起点、终点、圆心、半径及插补步长等；具有插补过程的动态显示功能，如单步插补、连续插补；插补的步长可调；编程语言任选；详细程序设计流程图；变量说明、源程序； DDA法直线插补算法描述利用数字积分原理，将函数积分运算变成对变量的求和运算。设置一个累加器和一个被积函数寄存器。插补开始前，累加器清零，被积函数寄存器分别寄存xe和ye；插补开始后，每来一个累加脉冲，被积函数寄存器里的坐标值在相应的累加器中累加一次，累加后的溢出作为相应坐标轴的进给脉冲，而余数仍寄存在累加器中；当脉冲源发出的累加脉冲数恰好等于被积函数的容量时，溢出的脉冲数等于以脉冲当量为最小单位的终点坐标，表明到达终点。变量说明 Xl0,Yl0——直线起点 Xle,Yle——直线终点 Xl,Yl——插补过程中实时坐标点 N——寄存器位数 M——累加脉冲当量数 Ll——插补步长 Jvx,Jvy——被积函数寄存器 Jrx,Jry——积分累加器插补流程图实现情况本程序是DDA法的直线插补程序，不仅实现了第三象限的插补，同时可以实现所有象限（包括跨象限的情况）的直线插补过程。实现过程中，积分累加器溢出时，判断直线走向，进而确定坐标轴的进给方向。可实现步长的更改。通过减少进给脉冲的大小，同时累加次数同比例增大，实现步长的调整。程序源代码见附录逐点比较法圆弧插补算法描述算法的基本原理是每次向坐标轴输出一个进给脉冲，每走一步，都要讲瞬时坐标与理论坐标相比较，判断实际坐标与理论坐标的偏移位置，通过偏差函数计算二者的偏差，从而决定下一步的进给方向。每进给一步都要完成偏差