The feedrate profile of non-uniform rational B-spline （NURBS） interpolation due to the contour errors is analyzed. A NURBS curve interpolator with adaptive acceleration-deceleration control is presented. In interpo- lation preprocessing, the sensitive zones of feedrate variations are processed with acceleration-deceleration control. By using the proposed algorithm, the machining accuracy is guaranteed and the feedrate is adaptively adjusted to he smoothed. The mechanical shock imposed in the servo system is avoided by the first and the second time derivatives of feedrates. A simulation of NURBS interpolation is given to demonstrate the validity and the effectiveness of the algorithm. The proposed interpolator can also be applied to the trajectory planning of the other parametric curves.
采用STM32F103VET6作为主控芯片,在该芯片上移植μC/OS-Ⅱ和u CGUI操作及嵌入式图形系统,通过编程控制IO口产生线阵CCD驱动时序,同时采集转换处理CCD传感器的输出信号并显示在触控液晶显示器上,使用u Ve rs ion4进行系统软件开发,实现了一个驱动时序稳定、便捷高效的移动嵌入式线阵CCD图像采集系统。
