Implementation of the SMC control strategy to an active horizontal seat suspension system

Abstract

This article discusses an application of the sliding mode control (SMC) in active suspension systems, with particular focus on its use in the mass-spring-damper (MSD) systems. The article highlights advantages of the SMC over traditional control methods, such as improved robustness and insensitivity to parameter variations. The use of active elements in the MSD systems, such as the permanent magnet synchronous motor (PMSM), is also discussed. The article presents the mathematical modeling of the MSD system and the development of the sliding mode controller. Simulation tests are conducted to evaluate the performance of the system, and the results are presented by means of the power spectral density and transmission function. The article concludes that although chattering effect occurs in the proposed control system and the desired force is well reproduced in a horizontal seat suspension, a slight delay of the system response is presented. The results of this study suggest that the proposed SMC control strategy is a promising solution for improving the ride comfort and stability of seat suspension systems.