Research on Vibration Control of Seating System Platform Based on the Cubic Stewart Parallel Mechanism

Fengrong Bi,Zhenpeng Lv,Teng Ma,Xiao Yang,Xu Wang

doi:10.1109/access.2019.2948785

Fengrong Bi, Zhenpeng Lv + Show 3 more

Open Access

https://doi.org/10.1109/access.2019.2948785

Copy DOI

Abstract

A multi-degree-of-freedom seating system platform based on the cubic Stewart parallel mechanism is designed for vibration control of an off-road vehicle driver's seat. A parameter sensitivity analysis is conducted to identify the most sensitive parameters for the transmissibility ratio of the seating system platform. Then, a vibration control method combining active and passive control for each branch of the seat platform leg is developed to reduce the driver's body vibration. The results indicate that the seating system platform designed in this article can reduce the vibration in the vertical direction, horizontal direction and roll direction simultaneously through passive vibration control. The vibration can be further reduced in these three directions by adding active vibration control.

Highlights

Off-road vehicles such as mining vehicles, tractors, and construction machinery are often used on non-paved roads
In this paper, a new structure of an MDOF seating system vibration reduction platform based on the cubic Stewart parallel mechanism is proposed
Based on the research methods of theoretical modeling, numerical simulation and experiment, both the vehicle passive and active seating suspensions have been studied based on the cubic Stewart parallel mechanism

Summary

INTRODUCTION

Off-road vehicles such as mining vehicles, tractors, and construction machinery are often used on non-paved roads. F. Bi et al.: Research on Vibration Control of Seating System Platform Based on the Cubic Stewart Parallel Mechanism. For the vibration reduction of vehicle seats, the vibration control of multiple degrees of freedom can be realized relatively conveniently by using the cubic Stewart mechanism. In this paper, a new structure of an MDOF seating system vibration reduction platform based on the cubic Stewart parallel mechanism is proposed. The results show that controlling the axial vibration acceleration of each branch leg of the seat platform can greatly reduce the vibration of the seat upper platform in the vertical, horizontal and roll directions simultaneously. F. Bi et al.: Research on Vibration Control of Seating System Platform Based on the Cubic Stewart Parallel Mechanism FIGURE 3.

DYNAMIC ANALYSIS OF THE CUBIC STEWART PLATFORM

DESIGN OF ACTIVE VIBRATION CONTROLLER

Findings

CONCLUSION