Open AccessFinite‐time nonsingular terminal sliding mode control of converter‐driven DC motor system subject to unmatched disturbances
Author(s) -
Rauf Arshad,
Zafran Muhammad,
Khan Awais,
Tariq Abdul R.
Publication year - 2021
Publication title -
international transactions on electrical energy systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 42
ISSN - 2050-7038
DOI - 10.1002/2050-7038.13070
Subject(s) - control theory (sociology) , terminal sliding mode , controller (irrigation) , invertible matrix , actuator , sliding mode control , trajectory , observer (physics) , tracking (education) , mode (computer interface) , terminal (telecommunication) , computer science , engineering , control engineering , mathematics , control (management) , physics , nonlinear system , artificial intelligence , telecommunications , quantum mechanics , pure mathematics , operating system , psychology , pedagogy , astronomy , agronomy , biology
Summary In this article, the problem of angular velocity trajectory tracking for converter‐fed DC motor system with mismatched disturbances/uncertainties is investigated using a continuous nonsingular terminal sliding mode control. The fourth order dynamic model of the system is quite higher than the second order of the traditional one, which makes the control design more challenging in terms of availability of various signals and tuning of the overall control parameters. Also, the actuator dynamics of the converter not only increase the system order but also generate mismatched disturbances/uncertainties, which is difficult to counteract through baseline sliding mode controller. The disturbance estimation information obtained from the finite time disturbance observer is incorporated into the design of nonsingular terminal sliding manifold. Then, a nonsingular terminal sliding mode controller is designed to achieve finite time tracking performance despite matched and mismatched disturbances/uncertainties. In addition, it retains the fine properties of nominal performance recovery as well as chattering alleviation. Finally, the superiority of the proposed method is shown both through numerical simulation and experimental results.