Study And Application Of Semi-active Suspension Based On ECU Hardware-in-the-loop

With the innovation of automobiles, hydraulic and electronic technology, themechanical and electronic integration system in improving the car’s ride comfort, handlingand fuel consumption rates applied more widely. Among these, using controlled suspensionsystem to improve the overall driving experience has gradually been around the vehiclemanufacturer’s attention. As the implementation part of the vehicle shock absorber system,the damper has a direct impact on its ride comfort and handling. Therefore, the study ofsemi-active suspension system is of great significance to improve vehicle performance.Due to long cycle and increasingly high cost factor, the traditional development way ofelectronic control systems is not suitable for the current requirements for rapid productturnover. In recent years, the V development process including HIL simulation technologyhas gradually been applied in the development of various vehicle subsystems. Comparedwith the traditional development process, the V development process not only saves costsand workload, but does not require an actual controlled object to complete its hardware andsoftware testing through the HIL, which does not have a real risk to finish the control unitand vehicle test in extreme danger conditions. Therefore, its application in the developmentof semi-active suspension system must also be given attention.This paper analyzes the research methods and current situation of semi-activesuspension system both at domestic and abroad. And then introduced the vehicle evaluationmethod witch related to the suspension system based on the real vehicle simulation model,including the inverse damper model needed for control algorithm, and built the ECU HILsystem at the same time. Then propose an adaptive hybrid damping control algorithm basedon the hybrid damping control algorithm, which can adjust the corresponding parameter ofthe control algorithms depending on vehicle speed and road input frequency, thereby improving the adaptability of different road and working conditions. Then optimize theparameters of the control algorithms according to the original vehicle parameters, and verifythe effectiveness of its control by ECU HIL test, which ensure the consistency of simulationresult and the run effect in the real ECU operating conditions. Finally, a real road test provedimprovement effect of the semi-active suspension on vehicle ride comfort and handling.