Influence of vehicle center of gravity change on dynamic characteristics
2021
Davidović, Mitar | Blagojević, Ana | Petrović, Dragan | Mileusnić, Zoran I. | Miodragović, Rajko M. | Dimitrijević, Aleksandra | Bošković, Biljana | Dimitrijević, Aleksandra | Zlatanović, Ivan
The position of the vehicle's center of gravity is one of the most important vehicle parameters, which has a significant role in the dynamic bahavior of the vehicle (roll, pitch, yawand load transfer). When the vehicle body moves, the weight of the vehicle is redistributed, which affects grip and stability. The aim of this work is to prove experimentally the influence of the change in the height of the center of gravity on the vehicle dynamic characteristics by adjusting the suspension system. Changes in the angles of the vehicle body in the longitudinal and transverse planes were observed.The experiment was performed on a vehicle that has a mechanically adjusted support of the spring wich changes suspension system parameters and the height of the center of gravity. The test was performed using the Moose Test, defined in ISO 3888-2, with roll, pitch and yaw (angle, rate and acceleration) and longitudinal speed and acceleration being measured by equipment installed in the vehicle. With this experiment we have quantified how the height of the center of gravity affects the dynamic characteristics and showed how much the dynamics of the vehicle is disturbed by ≈55 mm change in the height of the center of gravity.
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