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This paper deals with a new approach to analyse the influence of suspension on dynamic behaviour of vehicle and to synthesise the force-displacement transmittance of suspension. From a half-car model with four degrees of freedom, it is shown how the design of suspension, which is a vibration isolation problem, can be transformed into a synthesis of a robust control law of a multivariable uncertain...
In-wheel motor drive (IWMD) is currently a hot topic in electric vehicle research and development for its remarkable advantages. But the extra wheel mass from the motor worsens vehicle ride comfort and road holding. Motor vibration is another problem, which does harm to motor performance and service life. As a trial response to the above problems, a 1/4 car model is established for electrical vehicles...
Maintaining correct inflation pressure in tires helps to keep vehicle handling, passenger comfort and braking at its best, as well as improving fuel efficiency and tire life. Therefore it is very important that the tires are correctly inflated. To address this problem, in the present study experimental investigations have been carried out to identify the effect of under-inflated tires on suspension...
The nonlinear vehicle-road coupled system is modeled as a seven DOF vehicle moving along a simply supported double-layer rectangular thin plate on a nonlinear viscoelastic foundation. The vehicle suspension stiffness, suspension damping and tire stiffness are described by the nonlinear model. The material of the upper pavement surface is modeled as the nonlinear viscoelastic Leaderman constitutive...
Based on electrical-mechanical analogies, a principle of vibration isolation was presented, and a new vehicle suspension employing inerter, which can ease conflicts among individual performance measures for conventional suspension and improve on passenger comfort, was designed. After a quarter-car model was established, parameters of the suspension were optimized, and performance benefits in the suspension...
Aimed at the effect of variable coefficients and the constant coefficients to the system, a quarter-car two degree freedom suspension vibration model is described, with the aid of matlab alternating senior programmable language, the algorithm is gained through function file, the simulation model of the road noise and the suspension system is obtained. Moreover, The one order standard sensitivity function...
To design reliably the products transportation simulation experiment system based on multi-body dynamics theory, vibration theory and virtual prototyping, the transportation vehicle subsystem simulation models such as fore and rear suspension, tire, vehicle body and steering are built and the whole vehicle virtual model is assembled, through the application of multi-body dynamics software (ADAMS)...
Tire irregular wear brings more vibration, noise and safety problems than normal wear, which is more dangerous and makes tire junked earlier than default life. This paper built one tire 3-dof theoretical model to deal with the tire irregular wear problems caused by tread vibration in numerical method. The model included the vibration caused by forced-displacement, velocity and displacement feedback...
In the paper, a full-vehicle steering model is built based on the active suspension dynamics in steering system. In order to improve riding comfort and driving stability, the optimal full vehicle control technology is studied both in time-and frequency-domain. Considering the yaw, roll, pitch, vertical vibration of vehicle body and the deflection of suspension, a norm evaluation index Hinfin is defined...
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