China's " national long-term Science and Technology Development Plan ( 2006-2020 ) " to "high-end CNC machine tools and basic manufacturing equipment major projects " as one of 16 major projects of national science and technology , clearly put forward the development of China's high-end CNC machine tools goal. The traditional trapezoid and exponential acceleration deceleration due to the presence of mutations affecting the smooth motion , acceleration and deceleration due to the acceleration of a continuous flexible , much attention in high-speed machining.
China's " national long-term Science and Technology Development Plan ( 2006-2020 ) " to "high-end CNC machine tools and basic manufacturing equipment major projects " as one of 16 major projects of national science and technology , clearly put forward the development of China's high-end CNC machine tools goal. Development and application of high-end CNC machine tool numerical control system put forward higher requirements , including high-speed precision motion control has become a key technology of modern CNC systems , has been widespread attention at home and abroad , and a lot of research from theory to practical application and practice , effectively promote the high-end CNC machine tools and technological progress .
Deceleration technology

Goal is to achieve high-speed CNC machining , high precision and high efficiency machining . How to ensure a smooth machine motion under the premise of the transition process in the shortest time to achieve the goal of optimal acceleration and deceleration control law , so that the machine has to meet the requirements of high-speed machining characteristics of acceleration and deceleration , acceleration and deceleration are the key issues of the study. Acceleration and deceleration control programs usually have pre- and post- acceleration and deceleration control acceleration and deceleration control two kinds :
Deceleration before interpolation control is generally located before , after pretreatment interpolation , acceleration and deceleration control is targeted instruction feed rate ;
After deceleration control is usually after the interpolator , before the servo controller to control the feed rate of each axis of motion and so on.
After deceleration control without calculating the deceleration point , the algorithm is relatively simple, but if the servo gain is different for each axis of motion , likely to cause greater trajectory contour error , affecting movement accuracy.
Therefore , the main application before deceleration control technology. Acceleration and deceleration control method can be summarized as the traditional method and flexible acceleration and deceleration deceleration method : the traditional method has a trapezoidal acceleration and deceleration ramp and exponential acceleration and deceleration and other methods ; flexible method has trigonometric deceleration deceleration method , S curve acceleration and deceleration method and polynomial acceleration and deceleration method. The traditional trapezoid and exponential acceleration deceleration due to the presence of mutations affecting the smooth motion , acceleration and deceleration due to the acceleration of a continuous flexible , much attention in high-speed machining.