Performance comparison between semi-active suspension and passive suspension based on ceiling algorithm

This research explores continuous damping for vehicle suspension systems. We devise two models of suspension systems: one being a traditional passive suspension system and the other a semi-active variant. The semi-active suspension system is highlighted for its capability to enhance vibration reduction via adjustable damping, offering cost-effective and practical benefits over fully active counterparts. To further augment the performance of the semi-active suspension, we introduce a ceiling algorithm, which is instrumental in diminishing the vibrations affecting the rear sprung mass, thereby enhancing suspension system performance overall. Subsequently, we conduct a comparative analysis of the sprung acceleration responses of both types of suspension systems under various excitations, including step inputs, sine waves, random waves, and B-class road profiles. Our results demonstrate that the semi-active suspension system, when equipped with the enhanced ceiling control algorithm, surpasses both the traditional passive and semi-active cases utilizing the standard ceiling control algorithm. Specifically, the enhanced algorithm-equipped semi-active suspension exhibits lower root-mean-square acceleration and peak acceleration values, affirming its superior damping performance.