Research on Function Safety of Software Platform of CNC System Based on Safety Component Technology and AHP

In order to meet the demand of CNC system based on function safety, this article analyzes software design of CNC system based on function safety and a safety components sharing mechanism is proposed. At the same time, a method of security threshold distribution for software of CNC system is presented. This method establishes the system structure model of the CNC system software the relative weight of the function safety threshold of each layer element of the software architecture of CNC system is calculated by AHP method, at last, the safety threshold of the specific allocation of elements in the hierarchy is applied to the application of cultural algorithms. This method could bring the problem of resource and cost waste at different stages of software development. Tested by application, this method could maximize fit the demand of economy, feasibility and ceracity. It could also provide the basis for the development of subsystems.