Rollover mitigation for a heavy commercial vehicle |
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Authors: | Y I Ryu D O Kang S J Heo J H In |
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Institution: | 1.Graduate School of Automotive Engineering,Kookmin University,Seoul,Korea;2.School of Mechanical and Automotive Engineering,Kookmin University,Seoul,Korea;3.NewTech T&M,Gyeonggi,Korea |
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Abstract: | A heavy commercial vehicle has a high probability of rollover because it is usually loaded heavily and thus has a high center
of gravity. An anti-roll bar is efficient for rollover mitigation, but it can cause poor ride comfort when the roll stiffness
is excessively high. Therefore, active roll control (ARC) systems have been developed to optimally control the roll state
of a vehicle while maintaining ride comfort. Previously developed ARC systems have some disadvantages, such as cost, complexity,
power consumption, and weight. In this study, an ARC-based rear air suspension for a heavy commercial vehicle, which does
not require additional power for control, was designed and manufactured. The rollover index-based vehicle rollover mitigation
control scheme was used for the ARC system. Multi-body dynamic models of the suspension subsystem and the full vehicle were
used to design the rear air suspension and the ARC system. The reference rollover index was tuned through lab tests. Field
tests, such as steady state cornering tests and step steer tests, demonstrated that the roll response characteristics in the
steady state and transient state were improved. |
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