Efficiency of the SCI-QZS combined with the CCI in improving ride quality of soil compactors

To decrease the operator’s seat vibration and control the cab’s shaking of the soil compactor, the seat’s control isolation (SCI) added by the QZS structure (SCI-QZS) and the cab’s control isolations (CCI) combined are proposed and investigated. A three-dimensional dynamic model of the soil compactor under the interaction of the tire and drum on the deformable terrain is established to calculate the vibration equation of the soil compactor. The vehicle’s experimental study with the seat’s isolation added by the QZS structure is also given to verify the mathematical model and study result. The isolation efficiency and stability of the SCI-QZS and CCI combined are evaluated based on the root mean square accelerations of the operator’s seat (aws) and cab’s pitching angle (a wφc ) under the various conditions of the soil compactor. The research shows that with the isolation systems of the soil compactor seat and cab without the QZS structure and control, the operator’s ride comfort and the cab’s shaking are strongly affected under various operating conditions. With the soil compactor using the SCI-QZS and CCI combined, both the operator’s ride comfort and the cab’s shaking are greatly reduced under all the various operating conditions. Especially, the aws and a wφc are remarkably reduced by 67.8% and 59.8% in comparison with the isolation systems of the soil compactor seat and cab without the QZS structure and control. Therefore, the SCI-QZS and CCI combined should be applied on the soil compactor to improve the operator’s ride comfort and control the cab’s shaking of the soil compactors or other off-road vehicles.