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Tracking Active Control Forces by Using a Semi-Active Vehicle Suspension Integrated with Negative Stiffness.

Authors :
Shi, Xiang
Wu, Zhiwei
Hua, Yingyu
Shi, Wei
Zhu, Songye
Li, Jinyang
Source :
International Journal of Structural Stability & Dynamics. Jan2024, Vol. 24 Issue 2, p1-26. 26p.
Publication Year :
2024

Abstract

Active suspension technique normally provides the best vibration mitigation performance at the cost of high-energy consumption. In contrast, the energy consumption of a semi-active suspension is normally much smaller than that of an active suspension, whereas the control performance is compromised as well. Observing the core issue that caused such a phenomenon is that the existing semi-active control force, unlike the active control force, shall always oppose to the relative motion of the actuator (i.e. clipping phenomenon). This paper subsequently proposes a novel semi-active vehicle suspension system that incorporates a passive negative stiffness (NS) spring and a semi-active damper (SD) to realize uncompromised active control force while consuming energy of a typical semi-active suspension system. In specific, the proposed system allows for decomposition of the target active control force and tracked via the collaboration of the NS and SD components. Herein, the NS element is capable of releasing the store potential energy that subsequently eases the aforementioned clipping phenomenon of a traditional semi-active suspension. In this paper, besides the relevant clarifications on the system topology and working mechanism, its feasibility and performance enhancement are also validated via systematic numerical simulations of a vehicle suspension; and the results indicate, for the first time, that the proposed semi-active suspension can fully track the active control force and subsequently achieve unprecedented control performance comparable to an active controller. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
02194554
Volume :
24
Issue :
2
Database :
Academic Search Index
Journal :
International Journal of Structural Stability & Dynamics
Publication Type :
Academic Journal
Accession number :
175445640
Full Text :
https://doi.org/10.1142/S0219455424500196