Experimental And Performance Analysis Of Awd Torque Distribution Based On SOA

In the domestic market,with the improvement of social economic level,The vehicle’s handling stability,driving safety are gradually focused by consumer,besides the four-wheel driving vehicle’s driving potential which dues to its unique driving mode is also increasingly popular with the vast number of consumers.Compared with the traditional model of two-wheel driving,four-wheel driving car can give full play to the vehicle dynamic performance and make full use of adhesion which is provided by the road.In this paper,take an example of a timely four-wheel driving vehicle,having analyses on this vehicle dynamics,having a key research on how the steering torque distribution influences the vehicle performance status.Furthermore,by designing the torque distribution’s control strategy,identifying reasonable and effective and tracking of the steering intention,consequently improving the handling stability of the vehicle.The main research content of this article is as following:1)This article analyzes the domestic and foreign study for four-wheel drive technology research and development,and for the four-wheel drive,four-wheel drive timely,full-time four-wheel drive configuration and performance characteristics of in-depth analysis.At the same time,vehicle dynamic analysis was carried out,the seven degree of freedom(7-DOF)dynamic model of the vehicle is built on the basis of Matlab/Simulink software,model including vehicle dynamics parts,engine parts,transmission part and a tire attached to the module,the auxiliary calculation module.In order to facilitate targeted analysis,use of sub-block modeling method for the analysis of vehicle performance next step basis.2)Based on a timely four-whee drive car,it’s dynamic performance is analyzed,and three simulation analysis of inter-axial dynamic distribution ratio and inter-tire dynamic distribution ratio are conducted under different working conditions of various pavements and angles.On this basis,proposed layered coordinated control system based on torque distribution control,with two degrees of freedom linear half vehicle model as reference object,designed for the output torque distribution coefficient of adaptive PID controller structure.3)For the design of control system and controller to carry out the performance simulation of the typical working conditions,and At the same time using VG440 gyroscope and Angle sensor to carry out the real vehicle test,based on the obtained data and NI PXI hardware equipment to build the torque distribution in the ring test platform,the vehicle model and experiments have been carried out to verify the effectiveness of the control system structure.Results show that this control strategy can better follow the driver’s steering intention,vehicle driving stability is improved,the test results also verify the effectiveness of the control system.