کنفرانس مهندسی برق ایران

صفحه اصلی / سی و چهارمین کنفرانس بین المللی مهندسی برق

Finite-Time Nonlinear Robust Control of an Active Suspension System under Uncertainties

نویسندگان :

Gozar Ali Hazareh¹ Mohammad Kashi² Esmaeel Aslami³ Yazdan Batmani⁴

1- دانشگاه آزاد اسلامی واحد قزوین 2- دانشگاه آزاد اسلامی واحد قزوین 3- دانشگاه آزاد اسلامی واحد قزوین 4- دانشگاه کردستان

کلمات کلیدی :

Active suspension system،Nonlinear robust control،NFTSMC،Finite-time convergence،Chattering reduction

چکیده :

Ride comfort and vehicle stability are two key performance indicators in the design of active suspension systems, which are often challenged by road irregularities, external disturbances, and parameter uncertainties. Traditional linear and passive control approaches fail to achieve satisfactory results under these conditions, whereas robust nonlinear strategies provide a promising solution. In this study, a non-singular fast terminal sliding mode control (NFTSMC) scheme is proposed for a nonlinear half-car active suspension system. The proposed controller combines the advantages of fast terminal and non-singular terminal sliding surfaces to ensure finite-time convergence and strong robustness while completely avoiding singularity problems. In the switching phase, a rapid convergence law is incorporated to suppress chattering and preserve smooth actuator behavior. This dual-phase design guarantees high control precision, improved ride comfort, and stable tire–road contact even under severe road disturbances. Simulation results demonstrate that the proposed NFTSMC achieves faster response, lower body acceleration, and superior vibration suppression compared to conventional NFTSMC and other terminal-based methods, validating its effectiveness and potential for real-time vehicle applications.