Algorithm of S-shape acceleration based on control of anticipation time

ZHENG Zhong-qian，WANG Xing-fei，LI Song，LI Di

（School of Mechanical & Automotive Engineering，South China University of Technology，Gangzhou 510640，China）

Abstract：Aiming at the difficulties of parameter-setting and using the 7-phase S-curve acceleration and deceleration control model，a new method was proposed to implement S-curve acceleration and deceleration based on the control of anticipation time. The problem that the impacts in NC machining caused by discontinuous acceleration and velocity in linear acceleration and deceleration method，was overcome by 7-phase S-curve acceleration and deceleration control model. However，the parameter configuration is so complex that they can be easily misused. After the analysis of 7-phase control model，the functional relationship of the anticipation time and acceleration was established. Except the strength of motion stability，the control model was based on the control of the anticipation time of acceleration and was constructed by five phases，which means the process of parameter-setting is not only simplified greatly but also more convenient to use. The simulation results indicate that the algorithm can make sure the acceleration is continuous，which mean the flexibility of control system is improved，and much easier to implement. The method has a high practical value.