Numerical control system interpolation algorithm and numerical control system

The invention discloses a numerical control system interpolation algorithm and a numerical control system. The algorithm comprises: in a real-time operation system layer, an interpolation operation thread receives real-time control data transmitted by a non-real-time operation system layer; the interpolation operation thread uses a preset interpolation algorithm to calculate position control information of a servo driver of each sub-station from the real-time control data; and a bus communication thread is used for calling back the position control information of the servo driver and sending the position control information to the servo driver. According to the technical scheme, the numerical system interpolation algorithm is performed on the basis of real-time Ethernet bus technology. The structure and wiring are simple; the algorithm is high in real-time degree and transmission efficiency, long in transmission distance, good in anti-interference capability and stability, and easy for expansion and maintenan