Enhancing the vibratory roller's ride comfort with semi-active seat suspension embedded by quasi-zero stiffness structure

Development of vibration isolation models in vibratory roller’s seat and cabin: A survey

“…To assess the ride quality and performance of suspension systems in vehicles, the standard of ISO 2631-1: 1997 19 was directly applied in the existing studies of the vehicle's vibration. [7][8][9][10] With vibratory rollers, to evaluate vibratory roller's ride comfort using cabin's TRIs in Figures 6À8 as well as the isolation performance of the TRIs, according to the ISO 2631-1: 1997, the weighted Root-Mean-Square values of the vertical seat acceleration (RMS s ), cabin's pitching acceleration (RMS φc ), and cabin's rolling acceleration (RMS θc ) had been selected as the objective functions. Their RMS values had been written by Where λ refers to the vertical seat acceleration, cabin pitch acceleration, and cabin roll acceleration; a λ is acceleration responses in λ; and T is the time of the measurement or simulation.…”

“…38,41,[43][44][45][46][47] Its control model and structure have been shown in Figure 15b. Besides, based on the MRD controlled and applied on the vehicle semiactive suspension systems, 9,39,40,48,49 the seat's TSS using the active damping force was then researched and applied on the seat suspension system of heavy trucks, off-road vehicles, and vibratory rollers to augment driver's ride quality. 38,41,[43][44][45][49][50][51] Its structure and control model is shown in Figure 15c.…”

“…In the existing research of vibratory rollers, 4,[6][7][8][9][10]12,17,18 cabin's semiactive HIs or semiactive PHIs could control the cabin shaking and reduce the seat vibration. However, the seat's acceleration was high based on ISO 2631-1: 1997.…”

“…[1][2][3][4][5] Besides, researchers are also constantly developing new isolation systems for the cabin and seat to reduce the vibration of both the cabin and seat. [6][7][8][9] In the traveling and compacting conditions of vibratory rollers on deformable soil grounds, the vibratory roller's excitations were directly generated by the tire and vibratory drum interacting with the deformed soil grounds. All these vibration excitations were then transmitted to the driver through isolation systems of the cabin and seat.…”

“…7,8 In order to further enhance the ride quality of the driver as well as decrease cabin vibration angles, the pneumatic-hydraulic isolations (PHIs), semiactive HIs, or semiactive PHIs had been also investigated and developed for the cabin's isolation systems. 8,9,17,18 Both the ride comfort of the driver and cabin's shaking had been thus remarkably improved. However, the research also indicated that the seat's acceleration response in the vertical direction was still high based on ISO 2631-1: 1997.…”