Quasi-active suspension design using magnetorheological dampers

Jack N Potter, SA Neild, DJ Wagg

Research output: Contribution to journalArticle (Academic Journal)peer-review

21 Citations (Scopus)


Quasi-active damping is a method of coupled mechanical and control system design using multiple semi-active dampers. By designing the systems such that the desired control force may always be achieved using a combination of the dampers, quasi-active damping seeks to approach levels of vibration isolation achievable through active damping, whilst retaining the desirable attributes of semi-active systems. In this article a design is proposed for a quasi-active, base-isolating suspension system.

Control laws are firstly defined in a generalised form, where semi-active dampers are considered as idealised variable viscous dampers. This system is used to demonstrate in detail the principles of quasi-active damping, in particular the necessary interaction between mechanical and control systems. It is shown how such a system can produce a tunable, quasi-active region in the frequency response of very low displacement transmissibility.

Quasi-active control laws are then proposed which are specific for use with magnetorheological dampers. These are validated in simulation using a realistic model of the damper dynamics, again producing a quasi-active region in the frequency response. Finally, the robustness of the magnetorheological, quasi-active suspension system is demonstrated.
Translated title of the contributionQuasi-active suspension design using magnetorheological dampers
Original languageEnglish
Pages (from-to)2201 - 2219
JournalJournal of Sound and Vibration
Issue number10
Publication statusPublished - 2011


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