A Simulation and Optimization Method for Machine Tool Motion Trajectory Based on Digital Twins

In order to solve the problem that sudden changes in velocity and acceleration at the corners of adjacent segments during high-speed machining of tiny line segments can lead to motor vibration and tool over-cutting, a machine trajectory monitoring and optimization method based on digital twin simulation and adaptive local polynomial interpolation algorithm is proposed. The digital twin simulation system is set up to monitor the trajectory and speed of the machine tool during machining, and the adaptive fifth degree polynomial is used to fit the corner trajectory when there is a sudden change of speed or acceleration at the corner of the machining trajectory, and then the curve interpolation is carried out by using the fitted curves, so as to improve the stability and accuracy of machining. In the experiment, a digital twin simulation system is established based on four elements of the Agent, and then the runtime data of the physical machine tool is collected through the protocol. Finally, the trajectory is optimized using the polynomial interpolation algorithm. A digital twin simulation system for Turn-milling machines is established to validate the functionality