Article
Automation & Control Systems
Jinhui Zhang, Danni Shi, Yuanqing Xia
Summary: This paper investigates output feedback sliding mode control strategies for continuous-time linear systems with matched external disturbance. The design includes an output-based dynamic sliding surface and a controller organized using an auxiliary system approach. Simulation results demonstrate the effectiveness and advantages of the proposed design techniques.
Editorial Material
Engineering, Electrical & Electronic
Mohammad Saleh Tavazoei
Summary: This letter verifies that the main result of the above article [1] on converging the voltage tracking error of a buck converter controlled by a fractional-order sliding mode controller cannot be logically justified. The root cause of this inconsistency, which is an improper use of an inequality, is discussed.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2022)
Article
Automation & Control Systems
Tobias Holicki, Carsten W. Scherer
Summary: The dual iteration, introduced in 1997 by Iwasaki, is an iterative and heuristic procedure for designing static output-feedback controllers. It can be seamlessly extended to practical output-feedback designs through the framework of linear fractional representations. A novel control theoretic interpretation is provided, allowing for further generalizations of the powerful scheme to situations where the elimination lemma is not applicable.
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
(2021)
Article
Automation & Control Systems
Payam Haghighi, Babak Tavassoli
Summary: This article addresses the problem of robust static output feedback H-infinity control for networked control systems with uncertainties in both controlled-plant and communication subsystems. It employs Markov chains to model the network-induced delays and derives a new sufficient condition expressed in terms of linear matrix inequalities for the robust H-infinity control problem without constraints on matrix variables.
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
(2021)
Article
Automation & Control Systems
Amanda Spagolla, Cecilia F. Morais, Ricardo C. L. F. Oliveira, Pedro L. D. Peres
Summary: This article investigates the problem of designing robust static output-feedback or state-feedback controllers for discrete-time positive linear systems affected by time-invariant or time-varying parameters belonging to a polytope. It proposes an iterative procedure based on robust linear matrix inequalities to directly handle the control gain as an optimization variable. The method is shown to be less conservative than other approaches, providing solutions for cases where traditional design techniques cannot be applied.
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
(2022)
Article
Automation & Control Systems
Yahui Xu, Zhengchao Xie, Jing Zhao, Wenfeng Li, Panshuo Li, Pak Kin Wong
Summary: This paper investigates the problem of non-fragile H-infinity control for uncertain active suspension systems with time-delay using a fuzzy control approach in the finite frequency domain. A T-S fuzzy model is constructed, and a sufficient condition is presented to ensure stability and desired performance simultaneously, which is further transformed into a convex optimization problem. Numerical simulations demonstrate the effectiveness and performance advantages of the proposed control approach.
JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS
(2021)
Article
Automation & Control Systems
Thiago Alves Lima, Diego de S. Madeira, Valessa V. Viana, Ricardo C. L. F. Oliveira
Summary: In this paper, the concept of robust strict QSR-dissipativity is used to solve the static output feedback control problem for a class of continuous-time nonlinear rational systems subject to input saturation and bounded parametric uncertainties. By combining a local dissipativity condition with generalized sector conditions, the synthesis of a stabilizing controller is formulated in terms of linear matrix inequalities. Additionally, an iterative algorithm based on linear matrix inequalities is proposed to compute the feedback gain matrix that maximizes the estimate of the closed-loop region of attraction. Numerical examples are provided to demonstrate the applicability of this new approach.
SYSTEMS & CONTROL LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Lu Zhang, Jun Yang, Shihua Li, Xinghuo Yu
Summary: This study proposes an output-feedback sliding mode control strategy based on invariant manifold to deal with mismatched disturbances, achieving asymptotic tracking and disturbance rejection in systems. Experimental results demonstrate the superiority of this method.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS
(2021)
Article
Computer Science, Information Systems
Keqi Mei, Shihong Ding
Summary: This study presents a strategy for designing a fixed-time high-order sliding mode controller with asymmetric output constraints, using mechanisms such as implanting nonlinear terms, developing a barrier Lyapunov function, and integrating with a backstepping-like method to handle mismatched terms and asymmetric output constraints.
INFORMATION SCIENCES
(2022)
Article
Automation & Control Systems
Majid Parvizian, Khosro Khandani
Summary: This article addresses the exponential mean square stabilization of stochastic systems driven by fractional Brownian motion with state-delay and uncertainties through sliding mode control. The proposed method ensures that the states of the system reach the sliding surface in finite time. The use of linear matrix inequalities (LMIs) guarantees the mean-square exponential stability of the sliding motion, with conditions derived through a novel Lyapunov functional. A simulation example is provided to validate the results.
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
(2021)
Article
Automation & Control Systems
Yundi Chu, Shixi Hou, Cheng Wang, Juntao Fei
Summary: A continuous fractional order sliding mode controller based on a developed output feedback feature selection neural network (OFFSNN) is studied for an active power filter (APF) to improve power quality. The proposed OFFSNN is adept at adjusting neural structure and parameters by selecting beneficial nodes and deleting useless ones. Experiments on the APF platform demonstrate the effectiveness and superiority of the presented scheme.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2023)
Article
Automation & Control Systems
Kecai Cao, Chunjiang Qian, Juping Gu
Summary: This paper proposes novel compensating strategies in output feedback controller design for a class of nonlinear uncertain system. The compensation schemes eliminate the need for a sufficiently small sampling period or approximating step previously imposed, and allow for easy implementation of the proposed controllers using output measurements sampled at the current step and delayed output measurements sampled at the previous step without constructing state observers. The results have been illustrated through numerical studies.
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
(2023)
Article
Energy & Fuels
Tianhao Wen, Yang Liu, Q. H. Wu, Luonan Qiu
Summary: A cascaded sliding-mode observer based output feedback controller for MIMO system is proposed in this paper, designed based on feedback linearization control strategy. The observer provides accurate estimates of states and perturbations, ensuring Lyapunov stability of the closed-loop system and output tracking control. Simulation studies on SWNCSIB system validate the performance of the proposed observer-based output feedback controller.
CSEE JOURNAL OF POWER AND ENERGY SYSTEMS
(2021)
Article
Energy & Fuels
Tianhao Wen, Yang Liu, Q. H. Wu, Luonan Qiu
Summary: This paper introduces a cascaded sliding-mode observer for systems with high relative degree and investigates its use in output feedback controller design. The proposed observer is shown to have good performance, with smaller gain coefficients and a fast convergence rate of observation error compared to traditional observers. Simulation studies on a fifth-order system validate the effectiveness of the proposed observer.
CSEE JOURNAL OF POWER AND ENERGY SYSTEMS
(2021)
Article
Automation & Control Systems
Wu-Hua Chen, Xiaoqing Deng, Wei Xing Zheng
Summary: This article addresses the problem of sliding-mode control of linear uncertain systems with impulse effects. It introduces a piecewise linear sliding function considering the dynamics properties of impulses, and constructs a suitable integral sliding-mode control law. The stability of the resulting sliding-mode dynamics is analyzed using a piecewise discontinuous Lyapunov function.
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
(2022)
