General Theory of Skyhook Control and its Application to Semi-Active Suspension Control Strategy Design

Changning Liu,Xiaofeng Yang,Long Chen,Yi Yang,Xiaoliang Zhang

doi:10.1109/access.2019.2930567

Changning Liu, Xiaofeng Yang + Show 3 more

Open Access

https://doi.org/10.1109/access.2019.2930567

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Abstract

A novel general theory of skyhook control is proposed and applied to the semi-active suspension control strategy design to improve the performance of the vehicle suspension system. Based on this theory, the mechanical impedance model of the general theory of skyhook suspension is established. To design the suspension structure, the effect of the skyhook element and its parameters on suspension is analyzed. Then, adaptive fish swarm algorithm based on nonlinear dynamic visual field is used to optimize the parameters of the general theory of skyhook control. To realize the general theory of skyhook control and verify it, a novel controllable inerter is designed and utilized into the semi-active suspension system. The simulation results demonstrate that the semi-active suspension with a general theory of skyhook control can enhance the suspension performance. Finally, the robustness of the general theory of skyhook control under different spring stiffness and sprung mass is researched. The results indicate that the suspension with the general theory of skyhook control has superior performance and robustness compared with the traditional skyhook damper controlled suspension and passive suspension.

Highlights

The function of vehicle suspension is to improve the ride comfort and driving safety
The problem of lacking of stiffness, damping, or inertial characteristic in skyhook control is solved and a novel general theory of skyhook (GSH) control based on the theory of mechanical impedance is proposed
For the purpose of further exploration of the robustness of the GSH controlled suspension performance under different working conditions, the spring stiffness k and sprung mass m2 were set to different values, and the suspension model was simulated

Summary

INTRODUCTION

The function of vehicle suspension is to improve the ride comfort and driving safety. A common approach used to design the passive suspension is structure approach [4], [5], which bases on the passive elements (spring, damper, and inerter) connected in parallel or in series. C. Liu et al.: General Theory of Skyhook Control and Its Application to Semi-Active Suspension Control Strategy Design were compared. The problem of lacking of stiffness, damping, or inertial characteristic in skyhook control is solved and a novel general theory of skyhook (GSH) control based on the theory of mechanical impedance is proposed. Random-input test is taken to evaluate the performance of the semi-active suspension based on the GSH control.

THE EFFECT OF STRUCTURE AND PARAMETERS ON GSH SUSPENSION

Findings

CONCLUSION