Abstract
In the paper a model is developed for a proposed eddy current damper using finite element analysis. Several damper configurations are studied and its characteristics are analyzed. The steady state performance for the configurations is compared to reach a design with an acceptable performance for the eddy current damper. Furthermore, the proposed designs performance are compared with the traditional damper performance. It was found that the best two designs to achieve the targeted performance were to have an iron core damper or an iron core with an aluminum sleeve. Those two designs are economical and simple while achieving acceptable performance when compared to traditional dampers and other electromagnetic damping systems.
Highlights
It is well known that automotive shock absorbers represent the main part of suspension systems responsible for reducing effects of road bumps and, isolating the frame of the vehicle from driveway disturbances
The components of the traditional shock absorber are the spring and the hydraulic damper, The suspension components of the traditional shock spring andthe the kinetic hydraulic damper, this by this passive system keeps the car absorber balancedarebythe converting energy gained passive suspension system keeps the car balanced by converting the kinetic energy gained by disturbance into heat due to the internal pressurized oil passing through orifices [18]
In the model the eddy current damper will be added to the traditional damper, giving higher damping force proposed model the eddy current damper will be added to the traditional damper, giving higher and better suspension performance
Summary
It is well known that automotive shock absorbers represent the main part of suspension systems responsible for reducing effects of road bumps and, isolating the frame of the vehicle from driveway disturbances. It turns out that traditionally employed shock absorbers are comprised of hydraulic cylinders, where smoothing bump effects result in heat generation This fact in addition to the potential of viscous fluid leakage represents an environmental hazard. Common EMSs are either categorized as tubular electromagnetic actuator systems or eddy current systems Both exhibit smaller response time and wider effective bandwidth in comparison to conventional hydraulic shock absorber systems. For the case of eddy current EMSs, eddy currents due to permanent magnets are induced in the moving part of the EMS and, an opposing electromagnetic force proportional to the vertical motion velocity is created. This action replicates that of a viscous damper. It should be mentioned here that the application of an eddy currents damping effect has been previously investigated for the purpose of magnetic braking and vibration attenuation in mechanical structures [1,2,3,4,5,6]
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