This study evaluated the performance of the semiactive suspension system for a quarter-car by adopting a hybrid controller with a self-tuning FSMC (fuzzy sliding mode controller) and a self-organizing learning mechanism. A double-cylinder type of adjustable damper was designed and constructed for a passenger vehicle. As a result, the maximal approximate damping coefficient for a frequency of 2 Hz and an amplitude of 0.03 m upon stretching was 4156.7N s/ m, whereas the minimal approximate damping coefficient was 1686 Ns/m. Upon evaluating the damping characteristics of the proposed damper, a quarter-car suspension system was manufactured. The experimental results show that the proposed controller demonstrates significant improvements in the vibration suppression and sprung-mass acceleration for the vehicle performance under random road profiles. In accordance with ISO 2631-1:1997, this study also investigated the ride comfort level, the Meister chart and the peak value of PSD acceleration. Among the aforementioned analyses, the improvement rates achieved for passive suspension by the proposed controller at the peak value of PSD is 10.78% more than that obtained by the implementation of the mixed SH-ADD design for the level E road surface. This indicates that adopting the semi-active suspension system associated with the proposed control can enhance the ride comfort of the vehicle system.
Effect of a hybrid controller on ride comfort under random road excitation for a semi-active suspension system
2012
12 Seiten, 10 Bilder, 5 Tabellen, 20 Quellen
Article (Journal)
English
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