三次多项式型段内加减速控制新方法

传统的加减速控制方法由于加速度的不连续性，易使机床产生冲击，影响零件加工质量和机床使用寿命.为此提出了一种三次多项式加减速控制模型.针对任意路径段在插补前加减速过程中需要预测减速点的问题，进一步提出了段内加减速控制新方法，实现了对实际减速点的确定.针对理论减速点与实际减速点不重合而导致当减速阶段结束时仍存在低速运行段的问题，实现了对减速点的误差补偿.仿真和试验结果表明，提出的方法能够实现在加工过程中实际减速点的动态、智能化判断，并能够在较高速度下补偿减速点误差，消除了低速运行时间，提高了加工效率

New single segment acceleration and deceleration control method based on cubic polynomial model

In the traditional acceleration and deceleration control method,the vibration caused by acceleration discontinuity affects the machining quality and equipment life.An acceleration and deceleration control model was proposed to avoid the occurrence of intense vibration in high speed numerical control(NC) machining,and the speed curve was constructed by the cubic polynomial.Aiming at the problem of predetermining the deceleration point in acceleration/deceleration control before interpolation,a new single segment acceleration and deceleration control approach was put forward to confirm the actual deceleration point.The error compensation of the deceleration point was carried out to decrease the long running stage after decelerating at low speed since the actual deceleration point did not coincide with the theoretical one.The simulation and experimental results demonstrate that the proposed method can exactly and intelligently predict the actual deceleration point and significantly improve the productivity by compensating the deceleration point error at high feedrate.