基于并行冗余的CAN总线发动机试验台控制系统设计

Design of CAN bus engine test bench control system based on parallel redundancy

针对发动机试验过程中参数传输的不确定性问题,基于CAN2.0B协议规范,充分利用其扩展的仲裁场特点,结合并行冗余要求,针对CAN总线报文类别、传送方式和总线管理等方面制定了一种并行网络冗余规范,并在软硬件平台上设计了这种并行冗余CAN总线控制系统,最后在实验室的发动机试验台中进行了应用实施和功能验证,结果表明本文所设计的并行冗余CAN总线能实现网络传输容错功能,能明显提升发动机试验参数在控制网络的传输确定性。

In the view of the uncertainty of parameter transmission in the engine test process, it maked full use of the expansion of the arbitration field combined with CAN2.0B protocol specification to define a parallel network redundant specification in the field of message category, transmission mode and bus management in the need of parallel redundancy. And then the parallel redundant control system was designed in the platform of hardware and software. Finally, the designed parallel control system was applied in the engine test bench to verify the specification functional. The results showed that the parallel redundancy CAN bus designed in the paper could realize the function of network fault tolerant transmission. It also significantly enhanced the deterministic transmission characteristic in the engine test bench bus control system.