Designing an Optimal Proportional-Integral Sliding Surface for a Quarter Car Active Suspension System with Suspension Components Possessing Uncertain Constants and Nonlinear Characteristics
Subject Areas : electrical and computer engineering
S. A.
Zahiripour
1
(University of Science and Technology)
A. A.
Jalali
2
(University of Science and Technology)
Abstract :
In this paper, design of a controller for a quarter car active suspension system have been done with the focus on sliding mode strategy. Suspension components, including spring and shock-absorber have nonlinear characteristics with uncertain constants, but they have defined bound. To simplify the controller designing, feedback-linearization is proposed, then with using the optimal strategy, we obtain a proportional - integral sliding surface and a controller for meeting the sliding condition has been proposed. The design process is in a such way that not only, guarantees asymptotic stability of the suspension system in the presence of parametric uncertainties, but also the designer can supply his slightly trade-off between convenience of passengers and controllability of car, with setting some parameters.
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