ժҪ ���Ŀǰʱ�䴥��������������(CAN,Controller Area Network)����ȱ��ͳһ������������״,�����һ��ϵͳ��������������.���þ���װ���㷨����ϵͳ���Ⱦ���,ʵ����������Ϣ��ʵʱ����.���CAN���ߵĴ��������ʱ�䴥�����ص�,�Ľ���ʱ�䴥��ϵͳ�з�������Ϣ��ӳٵļ��㷽��.�ڴ˻�������Բ�����ϵͳʵʱ��Ҫ�����Ϣ����˼�����ʧЧ���ʵķ���,������ʱ�䴥��CAN����ϵͳ���������������,�����ϵͳ������������.���������ܹ�������Ч��,������ϢʧЧ�����Լ���ӳٶ�ϵͳʵʱ�Խ��з���,ʹ����������Ӿ�ȷ��ʵ��.
To solve the problem that time-triggered CAN (controller area network) bus system lacked a unified real-time performance assessment method, a complete system establishment and assessment scheme was proposed. Time-triggered CAN-bus system scheduling matrix was established by using average-loading algorithm and periodic messages were guaranteed to transmit without delay by distributing them independent transmission windows within the system matrix. While considering the traditional CAN-bus transmission mechanism and the time-triggeredness feature, a calculation method was improved to calculate the worst-case delay of event-triggered messages in time-triggered CAN-bus system. The failure probability was calculated for event-triggered messages whose worst-case delay exceeded their deadlines. System design and assessment process was established for CAN-bus transmission system and parameter adjustment was proposed to optimize system real-time performance. This assessment method could improve the design efficiency and the final analysis result is more accurate and practical by considering the effects of the event-triggered messages worst-case delay and failure probability.
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