The Electromechanical Low-Power Active Suspension: Modeling, Control, and Prototype Testing

W.J.E. Evers, A.P. Teerhuis, A.C.M. Knaap, van der, I.J.M. Besselink, H. Nijmeijer

Research output: Contribution to journalArticleProfessional

11 Citations (Scopus)
6 Downloads (Pure)


The high energy consumption of market-ready active suspension systems is the limiting factor in the competition with semi-active devices. The variable geometry active suspension is an alternative with a significantly lower power consumption. However, previous designs suffer from packaging problems, nonlinear stiffness characteristics, and failsafe issues. This paper discusses the feasibility of a recently presented, new design, variable geometry actuator, which has a fixed spring and constant stiffness. An actuator model is derived that includes the electric motor and friction characteristics. Using this model, a cascaded controller is developed and the steady-state and dynamic properties are evaluated. The simulation results are validated with prototype tests. The results show a good correspondence between simulations and measurements. Furthermore, a 10 Hz bandwidth can be easily obtained. It is concluded that the electromechanical low-power active suspension design is feasible and that the model gives a fairly accurate representation of both the steady-state and dynamic characteristics of the prototype.
Original languageEnglish
Article number041008
Pages (from-to)041008-1/9
Number of pages9
JournalJournal of Dynamic Systems, Measurement and Control : Transactions of the ASME
Issue number4
Publication statusPublished - 2011


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