位模式插补与位插补速度控制算法研究

为了给下位计算机的位插补运算提供精确的插补数据,避免下位机由于计算任务繁重而影响实时性,提出了一种基于上位计算机的误差可控的位插补数据牛成算法.首先,利用参数三次样条曲线拟合待加工曲线的关键型值点,获得加工曲线的刀位轨迹线;然后,根据推导出的最大允许误差与样条曲线离散段数之间的关系式,在给定的最大误差的约束下,对样条曲线进行离散化;最后,根据离散后的小线段计算生成位插补数据,传递给下位机.为了改善位插补加工效果,对位模式插补速度控制进行了研究,建立了位插补脉冲周期的数学模型.实际加工结果表明,给出的算法可行而且有效.

Bit pattern interpolation algorithm and velocity control of bit pattern interpolation

To provide accurate interpolation data for the bit pattern interpolation of the slave computer and ensure the real-time performance of the slave computer, an error-controllable bit pattern interpolation data generation algorithm based on the master computer was proposed. At first, the tool-path was acquired according to the key points of the machining curves. Parametric cubic spline was used to fit these key points. Then, the tool-path was dispersed into many line segments. To ensure the calculation accurac...