Research On Optimizing Performance Parameters Of Cab Suspension Based On Isight And Adams Software

With the rapid development of automobile industry,in addition to ensuring the normal transportation and integrality of goods,it is necessary to improve the ride comfort of drivers.The vibration isolation ability of the cab mount directly determines the ride comfort of the driver and is the main factor affecting the ride comfort analysis of the whole vehicle.Therefore,this paper takes the truck as the research object to improve the ride comfort of the truck by optimizing and matching the performance parameters of the cab mount.The main findings are as follows:1.Dynamic modeling of truck: through analyzing the structure of each subsystem of real vehicle,the modular modeling scheme of truck is worked out,and the sub-system models of cab assembly,front and rear suspension,flexible frame,power assembly and steering system,tire and trailer are set up in Adams/Car according to the test parameters of real vehicle.On this basis,the influence of cab structure parameters and performance parameters on the ride comfort of truck is analyzed.2.Parameter modification and verification of vehicle dynamics model: in the whole vehicle modeling process,the simplification of the model and the measurement error of the structural parameters and performance parameters of the key parts lead to a certain deviation between the simulation model and the real vehicle model.to improve the calculation accuracy of truck dynamics model,based on the Isight integrated optimization platform,this paper revised the truck dynamics model with cab quality,centroid X coordinates,and damping of front and rear suspension shock absorber as adjustable parameters.the vehicle dynamics model before and after correction was simulated and compared with the measured response.the results show that the accuracy of the model is improved by modifying the above parameters one by one,and the influence of cab quality and centroid position,front and rear suspension damping parameters on the ride comfort of the truck is also verified.3.optimization of cab mount performance parameters for ride comfort: based on the modified vehicle dynamics model,the stiffness and damping parameters of cab mount are optimized and matched by multi-objective optimization using the method of Isight and Adams/Car integration,and the optimization results are verified.the optimized vehicle model is simulated by random pavement at 60 km/h per hour to compare the improvement rate of the objective function before and after optimization.The results show that the effective value of X acceleration decreases by 11.2% and the effective value of Z acceleration decreases by 12.6% at the test point of cab seat guide rail,which proves the feasibility of the optimized design method to improve vehicle ride comfort.