Analysis of a novel methodology for shifting an isolated body based on nonlinear system vibration

Abstract

The asymmetrical damping of a vibration-isolation system induces a change in the mean position of the isolated body. Inspired by this phenomenon, a novel idea to vertically shift an isolated body based on nonlinear system vibration with asymmetrical damping is proposed. The proposed idea can be applied in fields that require the isolated body’s height to be adjusted. A methodology based on the homotopy analysis method (HAM), which is used to obtain the approximate analytical solution of a piecewise-smooth vibration-isolation system, was developed to verify the feasibility of the proposed idea. The accuracy of the solution obtained by the HAM was verified by the Runge–Kutta method. Furthermore, based on the analytical solution, the effects of critical parameters on the vibration responses of the system were analyzed. Finally, the proposed idea was applied to vehicle height adjustments. Simulation results showed that vehicle height adjustments could be realized only using a semi-active suspension. This provides a novel methodology for vehicle height control.

Lateral Stability Control of a Tractor-Semitrailer at High Speed

“…For the common high-speed lane-change maneuvers on the highway, it requires the tractor-semitrailer can change to the adjacent lane at a speed of not less than 80 km/h, and sometimes even requires the tractor-semitrailer to realize continuous lane-change maneuvers at high speed. This process involves the instantaneous turning of the vehicle, and the probability of the tractor-semitrailer instability will greatly increase, often causing serious traffic accidents [1][2][3][4]. Therefore, the high-speed driving stability of tractor-semitrailers has always been a hot topic for scholars at home and abroad [5][6][7].…”

High-speed lateral stability and trajectory tracking performance for a tractor-semitrailer with active trailer steering

“…Existing methods for improving vehicles' lateral stability or the trajectory tracking performance mainly include the active suspension method [4][5][6], the compliance steering or passive steering of the rear axles or wheels [7][8][9], the differential braking method [10,11], the active steering of the rear axles or wheels [12][13][14], and the parameter and state estimation for vehicles [15][16][17]. The active suspension method usually consumes a lot of energy, and the response speed is relatively slow, which is not practical for articulated heavy vehicles (AHVs).…”