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A novel control strategy for semi-active suspensions with variable damping and stiffness

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6 Author(s)
Spelta, C. ; Dipt. di Ing. dell'Inf. e Metodi Matematici, Univ. degli Studi di Bergamo, Dalmine, Italy ; Previdi, F. ; Savaresi, S.M. ; Bolzern, P.
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The problem considered in this paper is the study and the control strategy design of semi-active suspensions featuring the regulation of both damping and stiffness. This work presents an evaluation of the performances and drawbacks achieved by such suspension architecture, also in a non-linear setting (explicitly taking into account the stroke limits of the suspension). This paper then proposes a new comfort-oriented variable-damping-and-stiffness control algorithm, named Stroke-Speed-Threshold-Stiffness-Control (SSTSC), which overcomes the critical trade-off between the choice of the stiffness coefficient and the end-stop hitting. The use of a variable-damping-and-stiffness suspension, together with this algorithm, provides a significant improvement of the comfort performances, if compared with traditional passive suspensions and with more classical variable-damping semi-active suspensions.

Published in:

American Control Conference (ACC), 2010

Date of Conference:

June 30 2010-July 2 2010