Existing control schemes which distribute the roll moment by employing the ratio of the damping force of the front axle to the damping force of the rear axle using a semiactive suspension lack a theoretical foundation. Given that a new variable-stiffness variable-damping system configuration may require adjustment of only the damping force of a variable damper, this study considers an ordinary magnetorheological damper semiactive suspension itself as equivalent to a variable-stiffness variable-damping suspension system. The configuration of the semiactive suspension does not need any modifications. A novel control strategy is presented to control the stiffness of the suspension to distribute the roll moment between the front axle and the rear axle, and to regulate the damping force of the suspension to control the attitude of the vehicle body. This strategy considers neutral steering as the control target and minimizes the body accelerations in three directions. A nonlinear controller for the roll moment distribution and three fuzzy controllers for control of the attitude of the vehicle body are designed. The roll moment distribution coefficient is combined with three output control forces from the fuzzy controllers. Using decoupling calculations, the control forces in three directions are decoupled into four control forces generated by four magnetorheological dampers. The simulation results demonstrate that the proposed control strategy can achieve a favorable handling stability while maintaining an acceptable ride comfort.
Lateral stability control based on the roll moment distribution using a semiactive suspension
2017-10-01
13 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Lateral stability control based on the roll moment distribution using a semiactive suspension
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