Vehicle Mathematical modeling and dynamics

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SUMMARY

The discussion focuses on the challenges faced in modeling a vehicle's full suspension system, particularly regarding the dynamic response of the passenger seat. The user is experiencing excessive bounce and oscillations when road disturbances are applied, indicating potential resonance issues. Suggestions include adjusting the stiffness and damping parameters of the passenger seat, which have shown to reduce oscillations but not amplitude. Additionally, decreasing the mass of the system and positioning the passenger seat closer to the center of gravity (COG) significantly impacts the oscillation behavior.

PREREQUISITES
  • Understanding of vehicle dynamics and suspension systems
  • Familiarity with stiffness and damping parameters in mechanical systems
  • Knowledge of resonance phenomena in dynamic systems
  • Basic principles of mass distribution and center of gravity (COG) in vehicles
NEXT STEPS
  • Research techniques for modeling vehicle suspension dynamics using MATLAB Simulink
  • Explore methods for analyzing resonance in mechanical systems
  • Learn about the effects of mass distribution on vehicle stability and performance
  • Investigate advanced damping techniques to optimize passenger comfort in vehicles
USEFUL FOR

Mechanical engineers, automotive engineers, and students in electrical or mechanical disciplines focusing on vehicle dynamics and suspension modeling.

uzairkhan
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i am working on the vehicle full suspension model. I am in modeling phase , i am electrical student and i am facing some difficulty in the dynamic results . When i am giving road disturbance to the vehicle the pessanger seat is getting more bounce and oscillations as compared to body to which the disturbance is first transferred. The pessanger seat is modeled using its own stiffness and damping parameters. Plz clarify me the concept behind it.
 
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It is hard to tell with so little data, but you're probably in resonance. Change the stiffness and/or damping of the passenger seat and see what you get (make it stiffer).
 
thanks for suggestion , i will check it soon for the changes for which u have asked and will share the results.
 
i have checked the response of the system by changing the stiffness and damping parameters, but even then it has greater amplitude, though oscillations are reduced by increasing the damping.
One other thing i noticed is that by decresing the mass of the system i am getting minimum oscilations. Also as i am getting pessanger seat nearer to COG(where also body dynamics are being observed), the seat
and boody response getsalmost same(as it should be by geomatrical view). and as i am getting it far from the COG , it is getting more oscillations and amplitude.
 

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