Open CNC System Component Assemble Model based on Reliability

In order to realize the characteristics of the numerical control system including expandability and reconfigurability and to construct open CNC system platform with higher reliability, this paper established a component assembly model for numerical control system based on reliability. The numerical control system is divided into functional components which are relatively independent in logic. The numerical control system model is constructed based on the main evaluation indicator, the software reliability parameter of the numerical control system. The method is used in the interpolation module of the numerical control system with high requirement on timeliness. A solution is proposed based on improved particle swarm optimization (PSO), in which the rapid convergence of global optimal solution is guaranteed through flexible weighting method. According to the analytical result of the interpolation component assembly, a reliable and optimal open numerical control system can be constructed effectively and objectively based on the component assembly model in line with different evaluation indicator requirements.