Abstract
The positioning accuracy and positioning time of CNC systems have recently been the main performance criteria for industrial applications. The acceleration/deceleration modes, especially the deceleration modes, have an important effect on them. In this paper, firstly, some problems of the conventional linear deceleration algorithm are analyzed. Then an improved linear acceleration/deceleration algorithm is introduced. In this algorithm, the deceleration point is predicted exactly, and then the deceleration point error is compensated for at higher feedrates. Furthermore, a higher resultant maximum acceleration than that in the conventional scheme is selected to shorten the acceleration/deceleration time. Compared with the conventional linear acceleration and deceleration algorithm, the system performance has been significantly improved. Finally, the performance is confirmed by several simulations and experiments.
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