Simulation Research On Performances Of A Special Multi-wheel Distributed Driving Hybrid Vehicle Based On CRUISE

Hybrid vehicles with a distributed driving pattern can effectively improve the combat performance and survivability in battlefield because of simple structure,flexible chassis layout,high energy efficiency and superior dynamic control performance,etc.In this paper,designed a special multi-wheel distributed driving hybrid vehicle basing on a 6×6 all-wheel driving special vehicle.To simulate the performance of the designed vehicle,several aspects have been explored,including the structural analysis and parameter matching of the power train system,vehicle dynamics analysis,power train system control strategies,vehicle modeling and simulation,and differential assist steering,etc.First of all,conducted the structural analysis and parameter matching of the power train system,determined the use of tandem-type distributed drive and established a vehicle model with 9 freedom degrees to analyze the vehicle dynamics.Secondly,on the basis of analyzing control strategies of series hybrid vehicle,designed the auxiliary power unit(engine-generator set)and the motor driving/braking control strategy,and established the control strategy model in MATLAB/Simulink;then the model of 6×6 all-wheel drive special vehicle was established in CRUISE,the validity of the model was verified by comparing the simulation results with the experimental results.Based on this,a distributed-driven multi-wheel hybrid special vehicle model was established,and the control strategy was integrated into the CRUISE through API interface to conduct joint simulation analysis.In three different cycle conditions of FTP75,NEDC and six conditions,the vehicle simulation calculations were conducted,the results show that the dynamic performance and economic performance of new vehicle model have significant improvement than the original model.Additionally,on basis of the built 9-freedom-degree vehicle dynamic model,the differential steering control algorithm basing on the 3D checklist model and combining the PID controller with sliding mode controller was proposed,and it ensured the control stability and the real-time control.Simulation results show that the differential steering can quickly compensate the errors and reduce the steady-state steering radius in the case that the vehicle yaw rate does not reach the desired value,and it can greatly assist steering.