Article
Automation & Control Systems
Hamid Reza Shafei, Mohsen Bahrami, Heidar Ali Talebi
Summary: This study introduces a novel control strategy for managing nonlinear systems with mismatched uncertainties. It presents a disturbance observer (DO)-based hybrid control system that integrates robustness and control signal optimality, aiming to effectively handle uncertain nonlinear systems.
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
(2021)
Article
Automation & Control Systems
Huiming Wang, Qiyao Zhang, Zhenxing Sun, Xianlun Tang, I-Ming Chen
Summary: This article discusses a robust finite-time control framework using continuous terminal sliding-mode control and high-order sliding-mode observer for trajectory tracking of flexible-joint robots. Two high-order sliding-mode observers are proposed to estimate time-varying disturbances, and by fusing states and disturbance estimations into a novel terminal sliding-mode surface, a continuous robust FTC scheme is developed. The proposed control strategy can handle both matched and mismatched time-varying disturbances and achieve finite-time convergence performance.
IEEE TRANSACTIONS ON CYBERNETICS
(2022)
Article
Automation & Control Systems
Qinqin Sun, Xiuye Wang, Guolai Yang, Ye-Hwa Chen, Peng Duan
Summary: This article discusses a robust control scheme for pointing control of the marching tank gun, considering both horizontal and vertical subsystems and using uncertainty bound-based state transformation and robust control to achieve system stability for vertical pointing control.
IEEE TRANSACTIONS ON CYBERNETICS
(2022)
Article
Automation & Control Systems
Yongshun Zhao, Xiaodi Li, Shiji Song
Summary: This article studies the stabilization problem of mismatched disturbance systems with or without time delays using observed-based sliding mode control (SMC). Two SMC schemes are considered for systems with time delay and without time delay, respectively. Stability conditions for sliding motion are derived using Lyapunov-Krasovskii functional and Lyapunov function approach, applicable when the bound of disturbances are unmeasured or unknown.
IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS
(2021)
Article
Engineering, Electrical & Electronic
Zhuang Liu, Xinpo Lin, Yabin Gao, Ruiqi Xu, Jiahui Wang, Yijie Wang, Jianxing Liu
Summary: This paper investigates the fixed-time control problem of DC-DC buck converter systems with mismatched disturbances. Sliding mode fixed-time observers are constructed to estimate the matched and mismatched disturbances, and a novel segmented terminal sliding mode control variable considering the mismatched disturbances is designed. Additionally, a new second-order fixed-time reaching law is proposed to improve the tracking performance. A novel fixed-time nonsingular TSMC method based on the fixed-time observers is proposed to achieve accurate control in a fixed-time independent of the initial state. Comparative experiments are conducted to validate the effectiveness and practicality of the proposed control strategy.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2023)
Article
Computer Science, Information Systems
Shuiping Xiong, Xiaoyu Zhang, Yining Li
Summary: In this paper, an output feedback sliding mode control based on a robust integral sliding mode is proposed for switched systems with unmatched uncertainties. The method can reject the unmatched uncertainty and suppress the unmatched disturbance in both designed control switching rule and arbitrary switching rule.
Article
Computer Science, Information Systems
Bing He, Hailong Chen, Gang Liu, Xiaoxiang Hu
Summary: A robust learning control strategy is proposed for uncertain linear systems with mismatched disturbance, which involves establishing a linear model, designing a sliding surface, and conducting numerical simulation testing.
Article
Mathematics
Chih-Hsueh Lin, Guo-Hsin Hu, Jun-Juh Yan
Summary: This study introduces a robust sliding mode control method to achieve chaos synchronization even under the influence of matched/mismatched disturbances and input uncertainty. By using a proportional-integral switching surface, the controlled error dynamics in the sliding manifold become easier to analyze.
Article
Automation & Control Systems
Mohammad Pourmahmood Aghababa
Summary: This research focuses on the control problem of partially unknown nonlinear switched systems, with control algorithm based on variable structure control theory to handle mismatching uncertainties and gain deviations that weaken control effectiveness. The robust performance of the control strategy is confirmed through two illustrative examples.
IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS
(2021)
Article
Chemistry, Multidisciplinary
Duc Giap Nguyen, Duc Thien Tran, Kyoung Kwan Ahn
Summary: This study introduces a new disturbance observer-based chattering-attenuated terminal sliding mode control for nonlinear systems, which accurately estimates mismatched disturbances and ultimately stabilizes the target system. The utilization of a chattering-attenuated full-order terminal sliding mode structure satisfactorily resolves both chattering and singularity problems in controller design.
APPLIED SCIENCES-BASEL
(2021)
Article
Mathematics
Zahra Mokhtare, Mai The Vu, Saleh Mobayen, Afef Fekih
Summary: This paper proposes a fuzzy fast terminal sliding mode control approach based on linear matrix inequality (LMI) for a multi-input multi-output (MIMO) system. The approach aims to achieve finite-time convergence of system trajectories to desired values and eliminate chattering problem. The fuzzy logic approach is used to fine tune control parameters and reduce tracking error and control signal amplitude. Simulation results on a direct current (DC) motor demonstrate the effectiveness of the proposed control design.
Article
Automation & Control Systems
Mohsen Farbood, Zeinab Echreshavi, Mokhtar Shasadeghi, Saleh Mobayen
Summary: This paper proposes an event-triggered integral sliding mode control (ISMC) for perturbed nonlinear Takagi-Sugeno (TS) fuzzy systems. A disturbance observer is designed to estimate and reduce the unmatched disturbances. Two types of sliding surfaces are established to reduce computational burden and communication resources. The proposed control scheme ensures system performance enhancement and Zeno-free behavior.
JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS
(2023)
Article
Automation & Control Systems
Qingsong Xu
Summary: This article presents a novel adaptive integral terminal third-order finite-time sliding-mode control strategy for motion tracking control of a piezoelectric-driven nanopositioning system. The controller achieves finite-time convergence and chattering-free control action while estimating model uncertainty and updating control gains adaptively. Stability of the control strategy is proven through Lyapunov analysis, enabling precise third-order sliding-mode control and pre-specification of tracking error boundaries for the nanopositioning system. Results from simulations and experiments demonstrate the robust tracking performance of the developed controller in the presence of model uncertainty and external disturbances.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Automation & Control Systems
Emmanuel Moulay, Vincent Lechappe, Emmanuel Bernuau, Michael Defoort, Franck Plestan
Summary: The aim of this article is to develop new second-order fixed-time sliding mode controllers capable of handling mismatched disturbances. Unlike what is commonly done in the literature, the proposed sliding-mode control strategy does not rely on disturbance observers due to the robustness properties of the sliding surface. Moreover, the results are utilized to define a new fixed-time differentiator.
Article
Engineering, Electrical & Electronic
Xuefeng Zhang, Wenkai Huang, Qing-Guo Wang
Summary: This paper presents an H-infinity adaptive sliding mode fault tolerant control method for uncertain T-S fuzzy fractional order systems, with adaptive laws designed to estimate the upper bounds of nonlinear terms and a reduced dimension sliding surface constructed by state transformation. A sufficient condition is established using linear matrix inequalities to ensure stability of the sliding motion, with a new control law designed to reach the sliding surface in finite time, and both state and output feedback control forms addressed. Numerical simulations illustrate the proposed methods.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2021)
