Ride Comfort. Sedan Based On The Variable Universe Fuzzy Control Study

With the rapid economic development and people's living standardsimproving, the car has been into the tens of thousands of households. More andmore people put forward higher requirements for the performance of motorvehicles.But when the car at high speed, due to the uneven road surface, as wellas the movement of the vehicle interior components to stimulate the vibration ofthe vehicle vibration problems became more prominent. This has a direct impacton the car ride comfort and the comfort and safety and other issues. Therefore,the traditional passive suspension technology can not meet the demand foradvanced control of vehicle semi-active suspension technology will be in thecar on the extensive research and adoption.In order to verify the advantages of using Magneto-rheological FluidsDamper (MRD) in a car as the research object to establish a simplified vehiclemodel. Vehicle dynamic differential equations to transform the state spaceequation. Establishing typical grade B road simulation model and the simulationmodel of MRD, based on these two sub-simulation model of the vehicle controlsimulation model in Matlab/Simulink software control simulation. The vehiclesuspension system nonlinear characteristics, this article uses the domain of real-time adjustment variable universe fuzzy control for a vehicle suspension system.In this paper, the dynamic performance simulation of three different speeds oftravel in the B, C two grades on the road the car semi-active air suspensionsystem. In order to improve the efficiency and precision of the analysis ofsimulation data, it process data with the post-processing Matlab and ADAMStogether.Derived passive car suspension, fuzzy control and variable universe fuzzycontrol simulation, the ride comfort evaluation, this can get a ride comfortevaluation, including the acceleration of the center of mass, center of massdisplacement, pitch acceleration and roll angle acceleration time-domainsimulation results. At the same time the rms value of each index were compared.Dynamic load on each tire of the car traveling at a speed of30m/s Class B road, it conducted a comparative analysis of different control. Through the analysis ofsimulation results, we can clearly know that using a variable universe fuzzycontrol of semi-active suspension can be more effective to improve the ridecomfort of vehicles, including the improvement of the center of massacceleration is more than40percent, and greatly reduce the damage to thepavement.