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Observer-based finite-time control of conformable Takagi–Sugeno fuzzy systems with time delay

Asian Journal of control 2025年

作者： Kahouli, Omar Gassara, Hamdi Aloui, Ali Elleuch, Zied Bouteraa, Yassine Department of Electronics Engineering Community College University of Ha'il Ha'il Saudi Arabia Laboratory of Science and Technology of Automatic Control and Computer Engineering National School of Engineering of Sfax University of Sfax Sfax Tunisia Department of Computer Science Community College University of Ha'il Ha'il Saudi Arabia Department of Computer Engineering College of Computer Engineering and Sciences Prince Sattam Bin Abdulaziz University Al-Kharj Saudi Arabia

This paper examines finite-time (F-T) observer-based control of fractional-order nonlinear systems with time delay, employing the Takagi–Sugeno fuzzy (T-SF) approach. This study utilizes the conformable fractional derivative (CFD) as its foundational framework. Sufficient conditions are formulated to guarantee that the augmented vector, consisting of the state estimates and the state estimation errors, stays within a ball centered at the origin. This applies not only to specified initial conditions but also to predefined disturbances. These conditions are then reformulated as linear matrix inequalities (LMIs) conditions, which can be efficiently solved using the LMI toolbox. An illustrative example is given to illustrate the proposed result. © 2025 Chinese automatic control Society and John Wiley & Sons Australia, Ltd.

关键词： Delay-sensitive applications

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ON THE ROBUSTNESS OF LOW-ORDER SCHUR POLYNOMIALS

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IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS 1988年第5期35卷 570-577页

作者： KRAUS, FJ ANDERSON, BDO JURY, EI MANSOUR, M Institute of Automatic Control ETH Zurich Zurich Switzerland Department of Systems Engineering Australian National University Canberra ACT Australia Department of Electrical and Computer Engineering University of Miami Coral Gables FL USA

Robust Schur stability conditions are obtained for polynomials of orders two to five. For n=2 and 3, the conditions obtained are related to stability of the corner points, while for n=4 and 5, the conditions are related to stability of corner and possible supplementary points. The number of points increases substantially as the polynomial order increases. The obtained results are of importance in the robust design of control systems. The difficulty in extending the approach to higher-order polynomials is discussed. Special cases for such extensions are mentioned. Further applications of the results obtained may be of use in the stability study of two-dimensional systems. Some examples for the application of the stability conditions are given and, in particular, the two counterexamples presented in the literature are discussed.

关键词： low-order Multidimensional systems control systems higher-order Polynomial Steady state stability study corners Point of inflexion Robustness

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Congestion control of TCP/AQM networks using predictive control and on-line linearized models

Congestion control of TCP/AQM networks using predictive cont...

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11th IASTED International Conference on control and Applications, CA 2009

作者： Alvarez, Teresa Salim, Anuar Bolajraf, Mohammed Department of Engineering Science and Automatic Control School of Computer Engineering University of Valladolid Valladolid Spain

ISBN: (纸本)9780889867949

Internet users rely on the good capabilities of TCP/IP networks for dealing with congestion. Classic algorithms, such as drop tail or even RED, do not give good results under many situations. The network delay and the number of users fluctuate from one moment to the next. Predictive control can deal with these conditions so performance can be improved. This paper presents how predictive control, with on-line linearized models, performs better than PID or classic predictive control when dealing with control congestion, because changes in the network delay and the current number of users can be updated in the model. Non-linear simulations illustrate the advantages and disadvantages of the various methods under different working scenarios.

关键词： Linearization

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Dictionary Learning Algorithms and Applications 1

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2018年

作者： Bogdan Dumitrescu Paul Irofti

ISBN: (数字)9783319786742

ISBN: (纸本)9783319786735;9783030087616

This book covers all the relevant dictionary learning algorithms, presenting them in full detail and showing their distinct characteristics while also revealing the similarities. It gives implementation tricks that are often ignored but that are crucial for a successful program. Besides MOD, K-SVD, and other standard algorithms, it provides the significant dictionary learning problem variations, such as regularization, incoherence enforcing, finding an economical size, or learning adapted to specific problems like classification. Several types of dictionary structures are treated, including shift invariant; orthogonal blocks or factored dictionaries; and separable dictionaries for multidimensional signals. Nonlinear extensions such as kernel dictionary learning can also be found in the book. The discussion of all these dictionary types and algorithms is enriched with a thorough numerical comparison on several classic problems, thus showing the strengths and weaknesses of each algorithm. A few selected applications, related to classification, denoising and compression, complete the view on the capabilities of the presented dictionary learning algorithms. The book isaccompanied by code for all algorithms and for reproducing most tables and figures. Presents all relevant dictionary learning algorithms - for the standard problem and its main variations - in detail and ready for implementation;Covers all dictionary structures that are meaningful in applications; Examines the numerical properties of the algorithms and shows how to choose the appropriate dictionary learning algorithm.

关键词： Signal, Image and Speech Processing Mathematical and Computational engineering Circuits and Systems computer Communication Networks Information Systems and Communication Service

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Construction of the electromagnetic mill with the grinding system, classification of crushed minerals and the control system

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IFAC-PapersOnLine 2016年第20期49卷 67-71页

作者： Wolosiewicz-Glb, Marta Ogonowski, Szymon Foszcz, Dariusz AGH University of Science and Technology in Cracow Faculty of Mining and Geoengineering Department of Environmental Engineering and Mineral Processing United States Silesian University of Technology Faculty of Automatic Control Electronics and Computer Science Institute of Automatic Control Poland

The article presents the construction of an innovative electromagnetic mill, which in comparison to traditional solutions provide a significant reduction of energy consumption and higher technological performance. The device is equipped with a control system, measuring grinding quality or analyzing the operating status of the mill. Direct control of the grinding process is implemented in industrial controllers (PLC) and is supported by the optimization algorithms that run in the supervisory control system (SCADA). © 2016

关键词： Quality control

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RISC-V Extension for Optimized PWM control 27

RISC-V Extension for Optimized PWM Control

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27th International Conference on System Theory, control and Computing, ICSTCC 2023

作者： Popovici, Cosmin-Andrei Stan, Andrei Manta, Vasile-Ion Department of Computer Engineering Faculty of Automatic Control and Computer Engineering Technical University "Gheorghe Asachi" Iași Romania

ISBN: (纸本)9798350337983

This paper proposes a RISC-V extension, named SigWavy, meant to optimize the PWM control for general purpose or application specific designs. The RISC-V extension named above is a PWM control Unit with a dedicated ISA extension set designed for configuring and driving up to 32 PWM signals. The extension is integrated into RiscPwm, an updated version of our previous work, the RisCanFd SoC, for taking advantage of CAN-FD, a massively used protocol in the areas of automation and mobility. Being configured with the dedicated ISA extension or with parameters directly extracted from CAN-FD commands, the proposed solution manages to configure/reconfigure PWM channels between 4.79x and 9.18x times faster than an ARM Cortex-M7 processor, although our SoC operates with a 6x lower frequency. © 2023 IEEE.

关键词： Pulse width modulation

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EXPLICIT SOLUTION TO THE SINGULAR LQ REGULATION PROBLEM

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IEEE TRANSACTIONS ON automatic control 1992年第5期37卷 633-636页

作者： PENG, YB KINNAERT, M Department of Automatic Control and Computer Engineering Huazhong University of Science and Technology WUHAN China Laboratoire d'Automatique Universite Libre de Bruxelles Brussels Belgium

In this note, an explicit solution to the multivariable discrete linear quadratic (LQ) regulation problem is obtained in the limiting singular case where the input weighting matrix tends to zero. Such a solution follows from a suitable spectral factorization of the input spectrum density matrix under the assumption that the system is stabilizable and detectable, and its transfer function matrix is a full rank. The suitable spectral factor is shown to be the product of the system minimum-phase image and its unitary interactor matrix. The unitary interactor matrix defined here is a special case of the nilpotent interactor matrix defined in [5].

关键词： State feedback Covariance matrix Transfer functions Filters Riccati equations Poles and zeros Virtual manufacturing Programmable control Adaptive control automatic control

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On the orthogonal collocation and mathematical programming approach for state constrained optimal control problems

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Annual Review in automatic Programming 1985年第PART 2期13卷 1-7页

作者： Abdelrahman, O.E Abuelnasr, B.M Department of Mathematics and Computer Sciences Zagazig University Zagazig Egypt Department of Computer Sciences and Automatic Control Faculty of Engineering University of Alexandria Egypt

The orthogonal collocation approach is now well known to solve, effectively, the state constrained optimal control problems. Mathematical programming technique was also used as an effective tool to construct the optimal trajectories. In this paper, a study is done on the efficiency and accuracy requirements of the combined orthogonal collocation and mathematical programming approach, as regarding the employed optimization algorithm, and the number of orthogonal collocation points. It is shown, by experimentation with numerical examples that Fletcher-Powell optimization algorithm is much more faster to produce convergence than Fletcher-Reeves algorithm. The efficiency can be a ratio of six-to-one. The results are compared with an alternative approach to solve the same problem. It is shown that the present algorithm is less costly than the alternative approach, although requiring more computation time. The choice is then a compromise one. As the number of orthogonal points increases, the resulting solutions are more accurate, but the convergence speed decreases. Experimentation with N, shows a save of five-to-one in computing time can be achieved with almost the same cost function. Finally, it is shown, by a numerical example, that uniformly distributed collocation points result in non-optimal solutions, which also violate the problem constraints. It is a numerical proof of the superiority of the orthogonal collocation approach. © 1986.

关键词： convergence speed mathematical programming optimization algorithms Orthogonal collocation state constrained problems

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An Evaluation of the Dual Vectors Based Solutions for Robot-World/Hand-Eye Calibration 1

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25th International Symposium on Measurement and control in Robotics, ISMCR 2023

作者： Ganciu, Aura Burlacu, Adrian Department of Automatic Control and Applied Informatics Faculty of Automatic Control and Computer Engineering "Gheorghe Asachi" Technical University of Iași Iași Romania

ISBN: (数字)9783031510854

ISBN: (纸本)9783031510847

The hand-eye calibration problem represents a major challenge in robotics, arising from the widespread usage of robotic systems along with robot-mounted sensors. Briefly, consisting of estimating the position and orientation of a visual sensor (usually a camera attached to the robot’s end-effector) with respect to the robot itself, calibration is critical in tracking rigid bodies—a common task within mixed reality applications. Hand-eye calibration implies solving the problem formulated as AX = XB or AX = YB equations. The solution lies in computing the unknown homogeneous transformation matrices X and Y, given the A and B parameterizations of rigid body motions. We present the dual vectors based approaches for AX = XB and AX = YB calibration problems, making use of the isomorphism between the special Euclidean group and the orthogonal dual tensor group. Comparisons with state-of-the-art algorithms are used to assess our obtained results. © The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.

关键词： Mixed reality

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An improved pattern match method with flexible mask for automatic inspection in the LCD manufacturing process

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Expert Systems with Applications 2009年第2 PART 2期36卷 3234-3239页

作者： Lin, Chern-Sheng Huang, Kuo-Hon Lay, Yun-Long Wu, Kuo-Chun Wu, Yieng-Chiang Lin, Jim-Min Department of Automatic Control Engineering Feng Chia University Taichung Taiwan Department of Electronic Engineering National Chinyi Institute of Technology Taichung Taiwan Department of Information Engineering and Computer Science Feng Chia University Taichung Taiwan

This research examines the electrical conductive particles of anisotropic conductive film (ACF) during the laminate manufacturing process for liquid crystal displays (LCD) and adopts an improved pattern match method to apply on-line automatic and relevant measurement inspections. The focus of this research is describing and identifying feature images. We aim to improve the traditional pattern match methods including the gray scale designs, adaptive pattern matrix, and adaptive feature weight pattern to reduce the system function errors and to enable more efficient and quicker pattern searches and matches for full-size images. © 2008 Elsevier Ltd. All rights reserved.

关键词： Liquid crystal displays

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