Study of combined vibration-suppression method for vehicle vertical comprehensive performance

The constraint of invariant points leads to the trade-off between ride qualities and road-holding, limiting the improvement of vehicle comprehensive performance. This study presents a combined vibration-suppression method (CVSM) to address this issue. The CVSM includes a mechanical method (MM) and a control method (CM). The MM uses a tuned mass damper to eliminate the performance constraint. A multi-objective sliding mode controller functions as the CM to enhance comprehensive performance. In this paper, the nonlinear model of the MM is established, and a detailed dynamics analysis is conducted to provide insight into the constraint elimination theory. Then, the CM is designed to suit the novel suspension structure, improving both ride quality and road-holding. Analytical results show that the MM can share energy consumption with the suspension around the invariant point, which is the key to constraint elimination. Based on this, the CM increases the energy consumption efficiency of the MM. As a combination, the CVSM is more than just a simple sum of the two methods; they complement each other to improve overall performance.