Research On Control Method Of Anti-slip And Stability Control For Light-duty Vehicle On Driving-Steering On Low Adhesion Road

Automobile electronic technology of ABS/ASR/ESP can monitor the operation of vehicle real-timely, and improve the capacity of vehicle braking and driving actively, and control the vehicle under-steer or over-steer trends, and vehicle handling stability and vehicle driving safety. As automotive safety technology of the future developing direction, mastering ABS/ASR/ESP control system, means to hold the master of market of Automobile Safety in the future. Therefore, capturing System theory and key technologies, not only have important practical significance to enhance the domestic capacity of independent development of motor vehicles and reduce the gap between the developed countries, but also promote the automobile industry and the rapid development of related industries, and has broad application prospects.In this paper, based on drawing on domestic and foreign automotive ASR / ESP control technology,determine the content and implementation of programs. Research on"Control Method of Acceleration slip and Stability Control for Light-duty Vehicle on Driving-Steering on Low Adhesion Road". This paper includes:1. Dynamics simulation models on the target vehicle is built. The vehicle model include engine model, power train model, tire model, and brake system model. Application of Matlab/Simulink software set up a vehicle model. The model can meet the needs of different road input of the status of the simulation, such as vehicle starts, accelerates, straight drive, steering move . It can test the ASR/ESP control system.2. The objectives to steering and driving is determined, ensuring a smooth start and having a good acceleration and stability. Based on the yaw rate and slip rate of driving wheel, control strategies combining control of engine torque with the wheel brake pressure is proposed. In this paper, the control algorithm will choose the yaw angular velocity control as the main objective of the control. Yaw angular velocity in accordance with PID control of the vehicle through the engine torque and the wheel brake pressure. First of all, to ensure the security and stability of the vehicle. Slip rate of the driving wheel will be driven as a secondary objective of the volume control. According to the rate of wheel slip of the vehicle output torque and engine braking wheel pressure. Ensure the car can start to accelerate in the limit condition, making the vehicle not the loss of driving ability.3. According to the vehicle model and control logic, carry out simulation test. Aim at low adhesion road steering condition ASR /ESP control carry out simulation. For ASR control, ESP control and ASR / ESP integration control of a comparative analysis. The results showed that: the control strategy and algorithm can improve vehicle stability and inhibit the excessive wheel slip effectively, and enhance dynamic performance and stability performance of the vehicle. Vehicle yaw rate and wheel slip rate are effectively controlled, vehicle dynamic performance and stability performance are obviously improved.4. In accordance with test requirements, the conditions have been combined with the author's laboratory, the hydraulic control unit and sensors for test is determined. According to the steering position sensor, wheel speed sensors, yaw angular velocity sensor, acceleration sensors, and sensors character design and the characteristics of the signal transmission controller. According to the vehicle chassis layout and the features of HCU design the brake pipe layout and brake control arrangement designed HCU driving boards. Based on the target vehicle, build hardware in the loop model, test control strategies and the matching with HCU. AutoBox for the use of hardware in the loop testing and road tests, transfer the vehicle models and control logics into dSPACE with RTI , Loading AutoBox board within the DS1005, transfer sensor signals through DS2211 into DS1005 to simulate with ASR/ESP control logic.Compared to the single ASR and ESP control strategy, the control logic designed in this paper can be significantly improved conditions of vehicles turning in the direction of the limits of stability and dynamic traffic, And study the automotive electronic control system coordination and control, in-depth study for the future laid the foundation, but also cater to the automotive electronics technology development trend of. In this paper, the proposed control and yaw rate control drive roller to the parallel solution for the future of automotive electronics control technology to provide a certain reference value.