Analysis Of Influence Of Different Tire Models On Performace Simulation For Heavy-duty Truck

With the development of our national economy, commodities exchanges have become moreand more frequent in various areas, and launch vehicle market is booming. Heavy-dutytrucks have been favored because of their high efficiency and lower cost. Sales continued toincrease since2000and were over1million in2010. Due to China’s economic slowdown,withdraw of some support policy and the large influx of high-quality foreign vehicles, aserious decline in sales occurred in2011. In this situation, many companies encounter theproblem of how to maintain competitiveness in the market and how to lay a good foundationfor the next round of development.With the characteristics of large volume, high quality and high speed running, coupled withthe increased of road vehicles and the unprofessional of drivers, heavy-duty trucks aredemanded for better dynamics, economy, ride comfort, Handling and stability and safetyperformance. Therefore, the study of heavy-duty truck dynamics is important. Research onheavy-duty truck dynamics, a vehicle dynamics model is needed to build for performancesimulation. The tire model plays a very important role in the whole vehicle model, andselecting proper tire model to apply is extremely important.The main purpose of this paper were to study the effects of tire models on the vehicle’sperformances such as handling stability, ride comfort, dynamical and brake performance.The main contents are illustrated as follows:(1) Parameters identification for tire models based on Excel solverThe general process of Excel solver parameters identification was introduced briefly. The tiremodels, such as Fiala, UA, Pacejka89, Pacejka94and MF-Tyre5.2, were studied, and tirecoordinate systems and tire models were described in detail. The optimization target,identification process, solving table and estimation method were determined according to thecharacteristics of each tire model. Using the same group of tire model data,206parametersof5tire models were identified.(2)Handling and stability simulation of heavy-duty truck based on different tire modelThe basic method of ADAMS/Car modeling and simulation were introduced in briefly. Thesetting method of each tire model property file was described in detail, and5tire propertyfile were built; They were applied in the heavy-duty truck model which was built by other lab associates. In the same conditions, according to the national handling and stability teststandard, steering wheel angle step input test, steering wheel angle pulse input test, steeringreturn-ability test, steady-state circle test, pylon course slalom test and steering efforts testwere simulated based on5vehicle model which with different tire model. After simulation,steering wheel angle, lateral acceleration, yaw rate and roll angle were contrasted to analyzethe influence of tire models on vehicle simulation.(3) Straight line driving stability simulation of heavy-duty truck based on different tire modelRide comfort test, dynamic test and braking test were simulated based on national vehicletest standard and5heavy-duty truck models with different tire models. For ride comfortperformance, vehicle model ran under5different speeds. For dynamic performance,acceleration, climbing and sliding conditions were studied. For braking performance, theengine off brake and the engine combination brake were simulated. After completion of thesimulation, the simulation results were contrasted to analyze the influence of tire models onvehicle simulation.Based on a group of tire test data and a heavy-duty truck model, the parameters for buildingwheel system model were attained based on the same group of tire test data, and each of tireproperty file was applied in the heavy-duty truck model. Reference to the national standardof handling stability, ride comfort, dynamics and braking, all of this performance simulationwere conduct. The simulation results were contrasted to analyze the influence of tire modelson vehicle simulation. It not only provides basis for future tire model improvement, but alsoplay a significant role in tire model selection when building a vehicle model.