Skid-steering Wheeled Vehicle Model Coupled with Hydraulic Drive system and Its Dynamic Characteristics
Skid-steering wheeled vehicle has a wide range of applications.Understanding the impact of drive system on the vehicle driving and steering performance is the basis for forward design.In response to the design and analysis requirements of hydraulically-driven skid-steering wheeled vehicle,a coupling simulation model of hydraulic drive system and vehicle dynamics system is established based on the principle of the hydraulically-driven skid-steering wheeled vehicle systems.Combined with the specific vehicle parameters,the characteristics of the vehicle driving and steering conditions are simulated and analyzed to obtain the dynamic response characteristics of hydraulic driving system during vehicle driving.The simulated results of the model are verified through the actual vehicle.The results show that time-varying parameters such as road resistance,vehicle speed and driver operation have a great impact on the pressure of hydraulic driving system,which is strongly related to the dynamic steering resistance.The coupled simulation model can be used for the coupled simulation of vehicle motion state and hydraulic driving system state and the coupled analysis of hydraulic driving system characteristics and vehicle dynamics characteristics.
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