Research On Information Processing And Control Network Of Driving Stability Control System For Bus When Swerving

As one of the main means of transportation for people’s daily travel,bus has the characteristics of higher center of gravity,larger mass and volume,smaller wheel-base and more passengers.And it often drives in dangerous conditions such as complex roads and highways.So it is necessary to pay attention to the driving stability and safety for bus.The driving stability control system for bus when swerving as the research object,analyzes the related control information,and the immeasurable information of them is observed in real time.On this foundation,the driving stability control network and network node for bus when swerving are designed.The main research contents of this thesis are as follows:(1)The work principle and related information of active front steering system,pressure differential braking system and driving stability control system for bus when swerving are analysed.Driving stability control system modules for bus when swerving are divided,and the immeasurable and measurable information in control system is analysed.Dilated observation method based on Fal function and recursive least square method are used to observe the immeasurable information in control system,and the observation methods are verified by MATLAB/Simulink-TruckSim joint simulation.(2)Based on CAN(Controller Area Network)technology,the driving stability control network topology for bus when swerving is designed.Based on SAE J1939 protocol,the application layer protocol of driving stability control network for bus when swerving is established.The performance of the designed CAN network is analysed through theoretical analysis method.(3)The brake force distribution node in the driving stability control network for bus when swerving is regarded as the typical node,and the control strategy of the braking force distribution is designed.Using the idea of modularization,the hardware structure of the brake force distribution node is designed and tested.Hardware-in-the-loop experiment platform for the driving stability control network of bus when swerving is established by dSPACE control system,bus network comprehensive performance test rig,TruckSim software,WaveBPS software and so on.And the test platform is used to test the physical layer,the data link layer and the network performance of the designed CAN network.The research of this thesis provides technical support for research on information processing and control network of the driving stability control system for bus when swerving.It also lays the foundation for research on control algorithm and the concrete realization of control network for the driving stability control system of bus when swerving.