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Copyright of Studia Poliana is the property of Studia Poliana and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

For a class of seat suspension systems with body dynamics, an active controller is designed in this paper based on the sliding mode control approach. Matched road excitations and unmatched parameter perturbations in the system are considered, and a global sliding switching function is given. Based on Lyapunov theory, the robustness of the system is verified. The system states are observed by employing seat displacement and body acceleration based on the sliding mode observer. Simulation results demonstrate that the desired dynamics and robustness can be achieved in the case of varying stiffness and damping and bad road condition, which is otherwise by LQR controller and traditional sliding mode controllers. [ABSTRACT FROM AUTHOR]