Adaptive Fuzzy Sliding-mode Controller Design for Wheel Slide Protection Device of High-Speed Trains

سال انتشار: 1395
نوع سند: مقاله کنفرانسی
زبان: انگلیسی
مشاهده: 638

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شناسه ملی سند علمی:

MECHCONF01_127

تاریخ نمایه سازی: 21 شهریور 1395

چکیده مقاله:

Pneumatic wheel slide protection systems are employed in high-speed trains in order to maximize the frictional braking force which is a nonlinear function of the slip ratio of wheel sets. In this paper, in order to control the wheel slide protection system, a low-order model is presented which is more suitable for control purposes. The un-modeled dynamics are considered as uncertainties. Due to the nonlinear nature of the system’s dynamic equations and the existence of uncertainties, Adaptive Fuzzy Sliding-Mode Control (AFSMC) method has been employed to regulate the slip ratio to the desired value. The proposed controller is comprised of a fuzzy system, a robust controller and some appropriate adaptation laws. To design such a controller there is no need to know system’s parameters. The second Lyapunov theorem is used to prove the closed-loop asymptotic stability. In this paper, by considering the coupling forces between cars, the longitudinal motion of a high-speed train during braking has been modelled. Also in the performed simulations, the switching dynamics of the wheel slide protection system, frictional braking mechanisms, and resistant forces applied on the train cars have been considered. The obtained results indicate that by using the adaptive fuzzy sliding-mode controller, the slip ratio of wheel sets converges to a reference value; while, by applying the conventional approaches, the fluctuations of the slip ratio diverge near the stopping time. Thus, by applying the AFSMC method instead of the other approaches, the wear and deterioration of the frictional parts utilized in a braking system will be reduced.

کلیدواژه ها:

Pneumatic wheel slide protection system ، High-speed train ، Slip ratio of wheels ، Adaptive Fuzzy Sliding-Mode Control method

نویسندگان

Alireza Mousavi

MSc Student, Mechanical Engineering Department, Iran University of Science & Technology;

Amir H. Davaie-Markazi

Professor, Mechanical Engineering Department, Iran University of Science & Technology