Analysis And Modeling Of Controller Area Network Based On Selective Samples

This paper is supported by the National Natural Science Foundation of China(51475422).After understanding the bus protocol,mechanism of fault tolerance,selective sample character-istics of fault and accurate cognition of idle time,we proposed a method of bus fault modeling in the presence of errors and to predict the sending state of the new node.Controller Area Network(CAN)is a widely used fieldbus protocol in various industrial applications.In order to predict and estimate the response state message of the new nodes that has not been set up,so that we can grasp the network bandwidth characteristics and performance in advance.At the same,in order to understand the network behaviors under errors for optimal design of the networked control systems,we must analyze the fault model that exists on the faulty CAN bus and the possible state of the new message in this case.This paper is divided into five chapters,the contents of which are described as follows:In chapter 1,the domestic and overseas research status of the CAN bus message frame response time is introduced in detail,from this the problem which still requires for further study about response time and its realistic significance of the research is summarized,and then the research objectives,study contents and overall research methods are explained systematically.In Chapter 2,the principle of bus fault based on error events is expatiated and defined,and the identification error event is selected as the selective sample,then according to the two-step model of the selective sample,the scheme of the non-random missing data is established by first obtaining the whole data by interpolating the error event number and then modeling the fault,and the experiment was carried out.In Chapter 3,the Monte-Carlo simulation of missing data and parameter identification is used to establish the Poisson process model for the whole fault,and the distribution inference and hypothesis test are carried out.Finally,the reliability of the whole process is verified by experiments.In Chapter 4,the resulting fault model is used to analyze the response of a message and the interruption,and then the model is extended to analyze the idle time,that is,the analysis and calculation of the different types of bus systems which are based on distribution and the worst case these two different methods,and the state of the new message is predicted by the response of the new message,finally,this analysis is verified by experiments.In chapter 5,the paper summarizes the research work,expounds the research results and characteristics of this paper,and also makes a prospect for the shortcomings and future work of this topic.