Feeding speed dynamic real-time look-ahead control method suitable for numerical control device

The invention relates to a feeding speed dynamic real-time look-ahead control method suitable for a numerical control device. The method comprises the following steps: (1), a step of dynamic determination of the look-head segment number, to be more specific, the needed look-ahead track segment number when a numerical control device carries out processing at a current feeding speed is dynamically determined and a feeding speed of a last instruction point in the look-ahead track segments is marked as 0; (2), a step of real-time correction of a transfer speed, to be more specific, reverse acceleration is carried out from the instruction point where the feeding speed is marked as 0 to a track transfer point position that is nearest to a current track processing point and correction is carried out on transfer speeds of all the track transfer point positions; and (3), a step of real-time planning of the feeding speed, to be more specific, according to the current feeding speed and the corrected transfer speed of the track transfer point position nearest to the current track processing point, real-time planning is carried out on a feeding speed of a current interpolation period. According to the method provided by the invention, the look-ahead segment number can be dynamically determined; therefore, the calculated amount for look-ahead calculation can be effectively reduced; and it can be ensured that look-ahead control of a feeding speed can be completed within each interpolation period. Besides, interactivity is good.