Article
Engineering, Electrical & Electronic
Siamak Derakhshan, Marjan Shafiee-Rad, Qobad Shafiee, Mohammad Reza Jahed-Motlagh, Subham Sahoo, Frede Blaabjerg
Summary: This article presents an optimal decentralized robust H-infinity control system for the voltage control problem of autonomous uncertain dc microgrids, which is validated through simulations and experimental studies for its effectiveness and robust performance.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Automation & Control Systems
Lorenzo Carbone, Mario Marchesoni, Massimiliano Passalacqua, Luis Vaccaro, Andrea Formentini
Summary: This article introduces a new control algorithm for matrix converters based on full-state feedback, utilizing an H-2-linear matrix inequality (LMI) framework to expand the system stability region and introducing a Kalman filter for full system state estimation without the need for additional sensors. The method has a limited computational burden and does not require a high performance control platform. Experimental tests compare the proposed strategy with a previous stabilization approach in terms of stability performance and power quality.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Mathematics
Khac Huan Su, Kwankyun Byeon, Wonhee Kim, Youngwoo Lee
Summary: This study presents an LPV H-∞ control method with an augmented nonlinear observer (ANOB) to improve the position and yaw tracking errors for Sawyer motors. The proposed method utilizes forces and torque modulation, an ANOB, and a Lyapunov-based current controller with an LPV H-∞ state feedback controller to ensure stability of the tracking error dynamics. The ANOB estimates all state variables using only position feedback. The study evaluates the effectiveness of the method through simulation results and compares it with the traditional PID control method.
Article
Computer Science, Artificial Intelligence
Mouquan Shen, Yongsheng Ma, Ju H. Park, Qing-Guo Wang
Summary: This article focuses on the fuzzy fault-tolerant tracking control of Markov jump systems with unknown mismatched faults. Proportional-integral observers are established to reconstruct the faults and system states, and the gains are solved using a linear matrix inequality framework. A backstepping-based fuzzy fault-tolerant tracking control scheme is proposed to ensure uniformly ultimately bounded closed-loop system with rebuilt faults and states obtained from an iterative estimation algorithm. Simulations show the effectiveness of the proposed methods.
IEEE TRANSACTIONS ON FUZZY SYSTEMS
(2022)
Article
Energy & Fuels
Wei Hu, Yu Shen, Zhichun Yang, Huaidong Min
Summary: In this paper, a multi-objective optimization control design approach based on the LMI solution is proposed for the application of smart transformers. The approach is able to achieve excellent performances and alleviate the burden of designers.
Article
Computer Science, Information Systems
Wei Liu, Xuejie Que, Yanyan Wang
Summary: This paper focuses on the H infinity observer-based control problem for discrete-time singularly perturbed systems (DTSPSs) with nonlinear disturbances. The main contributions of this paper include the construction of a proper observer, the proposal of a sufficient condition for the asymptotic stability of the observer error system, and the design of an observer-based feedback controller based on the input-to-state stability property.
Article
Mathematics, Interdisciplinary Applications
Bingxin Li, Yaowei Liu, Xin Zhao
Summary: This paper studies H infinity and robust H infinity control for fractional order systems (FOS) with order 0<<1. Necessary and sufficient conditions for H infinity control and state feedback controller design are proposed. Robust H infinity control for FOS with uncertainty is also studied, and a state feedback controller is designed. These conditions are based on linear matrix inequalities (LMI) and can be easily solved using the LMI toolbox. The effectiveness of these conditions is verified through two numerical examples.
FRACTAL AND FRACTIONAL
(2022)
Article
Automation & Control Systems
Bingxin Li, Xin Zhao
Summary: This article studies robust H-infinity control for fractional order singular systems with uncertainty. By using two matrices to replace the complex matrix, the condition is easier to solve. The improved control conditions overcome the equality constraints. The effectiveness of the method is demonstrated through four examples.
OPTIMAL CONTROL APPLICATIONS & METHODS
(2023)
Article
Automation & Control Systems
Jie Chen, Haifeng Ma, Zhanqiang Liu, Qinghua Song, Zhenhua Xiong
Summary: This paper presents a novel finite-frequency band H-infinity state feedback control strategy for chatter control in turning processes. By incorporating dynamics of regenerative delay, cutting model uncertainty, and actuator output constraint, a FFB H-infinity controller is designed using the Lyapunov-Krasovskii functional and the generalized Kalman-Yakubovich-Popov lemma. Simulation and experimental studies verify the superiority of the developed controller over EFD controllers, demonstrating a significantly enlarged chatter-free region.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Automation & Control Systems
Leopoldo Jetto, Valentina Orsini, Raffaele Romagnoli
Summary: This article introduces a new approach based on a two degrees of freedom control scheme to simplify the complexity of stability and feasibility analysis of MPC and reduce the complexity of relative optimization procedures. The method computes the input through online minimization of a quadratic cost functional and applies it to the closed-loop system. By assuming the input forcing the system to be given by a B-spline function, the constrained optimization problem is greatly simplified.
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
(2021)
Article
Automation & Control Systems
Jason J. R. Liu, James Lam, Xiaochen Xie, Zhan Shu
Summary: This article extends lead, lag, and lead-lag compensators to multi-input-multi-output systems for the first time, while also providing algorithmic design methods that are more systematic compared to traditional approaches.
IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS
(2021)
Article
Automation & Control Systems
Chan-eun Park, Nam Kyu Kwon, PooGyeon Park
Summary: This article proposes a new strictly bounded real lemma (BRL) for continuous-time singular Markovian jump systems (SMJSs) in terms of strict linear matrix inequalities (LMIs). Based on the proposed BRL, the sufficient condition for state-feedback stabilization is successfully obtained, leading to finding the minimal Script capital H-infinity performance by solving the optimization problem subject to the suggested LMIs. Two examples demonstrate the less conservatism of the proposed method compared with the previous work.
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
(2021)
Article
Automation & Control Systems
Bor-Sen Chen, Yueh-Yu Tsai, Min-Yen Lee
Summary: This study proposes a robust decentralized stochastic H-infinity tracking control design for a large-scale biped robot team system, dealing with team formation tracking problem efficiently. By utilizing the concept of virtual leader and decentralized control approach, biped robots can track their reference paths reliably. Through converting the original design problem into a set of independent optimization problems, the difficulties in solving HJIs are overcome using convex optimization methods, and the team formation tracking control can scale to a very large size easily.
IEEE TRANSACTIONS ON CONTROL OF NETWORK SYSTEMS
(2021)
Article
Automation & Control Systems
Tuynh Van Pham, Dinh Hoa Nguyen, David Banjerdpongchai
Summary: This paper presents a design of robust hierarchical control for homogeneous linear multi-agent systems (MAS) with parametric uncertainty and external disturbance. The control design adopts a two-layer hierarchical structure where each agent executes local action and exchanges information with neighbouring agents to achieve global stabilisation and disturbance attenuation. Two robust control designs, robust H-infinity hierarchical control and robust H-2 hierarchical control, are proposed. The design of local and global feedback control laws is formulated as a constrained optimization problem using linear matrix inequalities (LMI). Numerical results demonstrate the effectiveness of the proposed robust controls in ensuring robust stability of MAS and improving disturbance attenuation.
INTERNATIONAL JOURNAL OF CONTROL
(2023)
Article
Automation & Control Systems
Yankai Li, Mou Chen, Tao Li, Huijiao Wang
Summary: This article studies resilient anti-disturbance control for an uncertain turbofan system with unmeasured states and multiple disturbances. By using state and disturbance observers, the system is able to estimate unmeasured states and unknown disturbances, leading to control strategies that reject disturbances and enhance system robustness. Lyapunov stability theory and LMI technology are utilized to design algorithms for checking controller gain and observer performance, with numerical simulations demonstrating the effectiveness of the proposed methods.
IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS
(2021)
