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Robust H ∞ preview control of an active suspension system with norm-bounded uncertainties

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Abstract

A robust H ∞ preview control is investigated for an active suspension system with look-ahead sensors. The uncertain system is described by a state-space model with linear nominal parts and additional nonlinear time-varying norm-bounded uncertainties. Proof of robust stability and a feedback-type robust H ∞ preview controller are derived by augmenting the dynamics of the original system and previewed road input. As, however, the augmented previewed road input gives the system a much larger dimension than the original system, much more computation time is required for solving of Riccati equations. To resolve this problem, a decomposed robust H ∞ preview controller is proposed. Robust stability and performance variations for system uncertainties are shown using a numerical example of a quarter-car model.

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Authors and Affiliations

  1. Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701, Korea

    S. Ryu, Y. Kim & Y. Park

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  1. S. Ryu
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  2. Y. Kim
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  3. Y. Park
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Correspondence to Y. Park.

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Ryu, S., Kim, Y. & Park, Y. Robust H ∞ preview control of an active suspension system with norm-bounded uncertainties. Int.J Automot. Technol. 9, 585–592 (2008). https://doi.org/10.1007/s12239-008-0069-7

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  • DOI: https://doi.org/10.1007/s12239-008-0069-7

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