| ROBUST H∞ PREVIEW CONTROL OF AN ACTIVE SUSPENSION SYSTEM WITH NORM-BOUNDED UNCERTAINTIES |
| S. RYU, Y. KIM, Y. PARK |
| Korea Advanced Institute of Science and Technology (KAIST) |
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| ABSTRACT |
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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 normbounded 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. |
| Key Words:
Robust H∞ preview control, Active suspension, Decomposed preview controller, Robust stability |
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