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Performance analysis model for real-time Ethernet-based computer numerical control system

         

摘要

In order to optimize the embedded system implementation for Ethernet-based computer numerical control (CNC) system,it is very necessary to establish the performance analysis model and further adopt the codesign method from the control,communication and computing perspectives.On the basis of analyzing real-time Ethernet,system architecture,time characteristic parameters of control-loop etc,a performance analysis model for real-time Ethernet-based CNC system was proposed,which is able to include the timing effects caused by the implementation platform in the simulation.The key for establishing the model is accomplished by designing the error analysis module and the controller nodes.Under the restraint of CPU resource and communication bandwidth,the experiment with a case study was conducted,and the results show that if the deadline miss ratio of data packets is 0.2%,then the percentage error is 1.105%.The proposed model can be used at several stages of CNC system development.

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