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Interval Observers for Linear Impulsive systems

IFAC-PapersOnLine 2016年第18期49卷 867-872页

作者： Degue, Kwassi H. Efimov, Denis Richard, Jean-Pierre Non-A team @ Inria Pare Scientifique de la Haute Borne 40 av. Halley Villeneuve d'Ascq59650 France Ecole Centrale de Lille BP 48 Cité Scientifique Villeneuve-d'Ascq59651 France Department of Control Systems and Informatics ITMO University 49 Kronverkskiy av. Saint Petersburg197101 Russia Department of Electrical Engineering Polytechnique Montreal and GERAD MontrealQCH3T-1J4 Canada

The problem of interval observer design is studied for a class of linear hybrid systems. Several observers are designed oriented on different conditions of positivity and stability for estimation error dynamics. Effciency of the proposed approach is demonstrated by computer experiments for academic and bouncing ball systems. © 2016

关键词： Hybrid systems Linear systems Bouncing ball systems Computer experiment Estimation errors Interval observers Linear hybrid systems Linear impulsive Stability analysis

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Hybrid spiral-dynamic bacteria-chemotaxis algorithm with application to control two-wheeled machines

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Robotics and biomimetics 2017年第1期4卷 3页

作者： K M Goher A M Almeshal S A Agouri A N K Nasir M O Tokhi M R Alenezi T Al Zanki S O Fadlallah Department of Informatics and Enabling Technologies Lincoln University Lincoln New Zealand. Electronics Engineering Technology Department College of Technological Studies Public Authority for Applied Education and Training (PAAET) Adailiya Kuwait. Department of Automatic Control and Systems Engineering The University of Sheffield Sheffield UK. Mechanical Engineering Department Auckland University of Technology Auckland New Zealand.

This paper presents the implementation of the hybrid spiral-dynamic bacteria-chemotaxis (HSDBC) approach to control two different configurations of a two-wheeled vehicle. The HSDBC is a combination of bacterial chemotaxis used in bacterial forging algorithm (BFA) and the spiral-dynamic algorithm (SDA). BFA provides a good exploration strategy due to the chemotaxis approach. However, it endures an oscillation problem near the end of the search process when using a large step size. Conversely; for a small step size, it affords better exploitation and accuracy with slower convergence. SDA provides better stability when approaching an optimum point and has faster convergence speed. This may cause the search agents to get trapped into local optima which results in low accurate solution. HSDBC exploits the chemotactic strategy of BFA and fitness accuracy and convergence speed of SDA so as to overcome the problems associated with both the SDA and BFA algorithms alone. The HSDBC thus developed is evaluated in optimizing the performance and energy consumption of two highly nonlinear platforms, namely single and double inverted pendulum-like vehicles with an extended rod. Comparative results with BFA and SDA show that the proposed algorithm is able to result in better performance of the highly nonlinear systems.

关键词： Bacteria chemotaxis Hybrid fuzzy logic control PD-like fuzzy logic control Spiral dynamics Two-wheeled inverted pendulum with new configuration

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Author Correction: Near-real-time monitoring of global CO2 emissions reveals the effects of the COVID-19 pandemic

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Nature communications 2020年第1期11卷 6292页

作者： Zhu Liu Philippe Ciais Zhu Deng Ruixue Lei Steven J Davis Sha Feng Bo Zheng Duo Cui Xinyu Dou Biqing Zhu Rui Guo Piyu Ke Taochun Sun Chenxi Lu Pan He Yuan Wang Xu Yue Yilong Wang Yadong Lei Hao Zhou Zhaonan Cai Yuhui Wu Runtao Guo Tingxuan Han Jinjun Xue Olivier Boucher Eulalie Boucher Frédéric Chevallier Katsumasa Tanaka Yiming Wei Haiwang Zhong Chongqing Kang Ning Zhang Bin Chen Fengming Xi Miaomiao Liu François-Marie Bréon Yonglong Lu Qiang Zhang Dabo Guan Peng Gong Daniel M Kammen Kebin He Hans Joachim Schellnhuber Department of Earth System Science Tsinghua University Beijing China. zhuliu@***. Laboratoire des Sciences du Climat et de l'Environnement LSCE CEA CNRS UVSQ Centre d'Etudes Orme de Merisiers Gif-sur-Yvette France. Department of Earth System Science Tsinghua University Beijing China. Department of Meteorology and Atmospheric Science The Pennsylvania State University University Park PA USA. Department of Earth System Science University of California Irvine 3232Croul Hall Irvine CA USA. Division of Geological and Planetary Sciences California Institute of Technology Pasadena CA USA. Jet Propulsion Laboratory California Institute of Technology Pasadena CA USA. Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment Technology School of Environmental Science and Engineering Nanjing University of Information Science and Technology Nanjing China. Key Laboratory of Land Surface Pattern and Simulation Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China. Climate Change Research Center Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China. Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China. School of Environment Tsinghua University Beijing China. School of Mathematical School Tsinghua University Beijing China. Department of Mathematical Sciences Tsinghua University Beijing China. Center of Hubei Cooperative Innovation for Emissions Trading System Wuhan China. Faculty of Management and Economics Kunming University of Science and Technology 13 Kunming China. Economic Research Centre of Nagoya University Furo-cho Chikusa-ku Nagoya Japan. Institut Pierre-Simon Laplace Sorbonne Université/CNRS Paris France. Université Paris Dauphine Place du Maréchal de Lattre de Tassigny 75016 Paris France.

A Correction to this paper has been published: https://***/10.1038/s41467-020-20254-5.

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Observer based policy iteration algorithm for fault tolerant control of nonlinear systems with actuator faults

Observer based policy iteration algorithm for fault tolerant...

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World Congress on Intelligent control and Automation (WCICA)

作者： Bo Zhao Derong Liu Yuanchun Li Guang Shi State Key Laboratory of Management and Control for Complex Systems Chinese Academy of Sciences Beijing China School of Automation and Electrical Engineering University of Science and Technology Beijing Beijing China Department of Control Science and Engineering Changchun University of Technology Changchun China

ISBN: (纸本)9781467384155

This paper investigates a novel fault tolerant control scheme to handle actuator faults in nonlinear systems based on policy iteration algorithm with fault observer. The fault observer is established to estimate the actuator fault, which is used to construct an improved performance index function that reflects the fault, regulation and control simultaneously. With the help of the proper performance index function, the FTC problem is transformed into an optimal control problem. By constructing a critic neural network, the Hamilton-Jacobi-Bellman equation can be solved by using policy iteration algorithm, and then the approximated fault tolerant controller can be obtained directly. The closed-loop system is guaranteed to be uniformly ultimately bounded based on the Lyapunov's direct method. Simulation example is given to verify the effectiveness of the developed FTC scheme.

关键词： Actuators Performance analysis Observers Optimal control Nonlinear systems Fault tolerance Fault tolerant systems

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Variable selection in identification of a high dimensional nonlinear non-parametric system

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control Theory and Technology 2015年第1期13卷 1-16页

作者： Er-Wei BAI Wenxiao ZHAO Weixing ZHENG Department of Electrical and Computer Engineering University of Iowa School of Electronics Electrical Engineering and Computer Science Queen's UniversityBelfast U.K. Key Laboratory of Systems and Control Academy of Mathematics and Systems Science National Center for Mathematics and Interdisciplinary Sciences Chinese Academy of Sciences School of Computing Engineering and Mathematics University of Western Sydney

The problem of variable selection in system identification of a high dimensional nonlinear non-parametric system is described. The inherent difficulty, the curse of dimensionality, is introduced. Then its connections to various topics and research areas are briefly discussed, including order determination, pattern recognition, data mining, machine learning, statistical regression and manifold embedding. Finally, some results of variable selection in system identification in the recent literature are presented.

关键词： System identification variable selection nonlinear non-parametric system curse of dimensionality

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How to monitor and mitigate stair-casing in L1 trend filtering 40

How to monitor and mitigate stair-casing in L1 trend filteri...

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40th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2015

作者： Rojas, Cristian R. Wahlberg, Bo Department of Automatic Control ACCESS Linnaeus Centre School of Electrical Engineering KTH Royal Institute of Technology Sweden

ISBN: (纸本)9781467369978

In this paper we study the estimation of changing trends in time-series using 1trend filtering. This method generalizes 1D Total Variation (TV) denoising for detection of step changes in means to detecting changes in trends, and it relies on a convex optimization problem for which there are very efficient numerical algorithms. It is known that TV denoising suffers from the so-called stair-case effect, which leads to detecting false change points. The objective of this paper is to show that 1trend filtering also suffers from a certain stair-case problem. The analysis is based on an interpretation of the dual variables of the optimization problem in the method as integrated random walk. We discuss consistency conditions for 1trend filtering, how to monitor their fulfillment, and how to modify the algorithm to avoid the stair-case false detection problem. © 2015 IEEE.

关键词： change point detection Fused Lasso generalized lasso TV denoising ℓ1 trend filtering

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I&I based Command Filtered Back-stepping of Pure-feedback systems in presence of Non-linearly Parameterized Uncertainty 34

I&I based Command Filtered Back-stepping of Pure-feedback Sy...

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第三十四届中国控制会议

作者： JI Yuehui ZONG Qun NI Weichen LI Junfang School of Electrical Engineering and Tianjin Key Laboratory for Control Theory & Applications in Complicated Systems Tianjin University of Technology Department of Electrical Engineering and Automation Tianjin University

ISBN: (纸本)9781467374439

An Immersion and Invariance-based command filtered back-stepping control, is addressed for non-linearly parameterized pure-feedback systems, which avoids the complicate analytic derivatives in traditional back-stepping design. In the underlying control scheme, integral sliding-mode filters are designed to approximate the virtual control derivatives, to solve the nd in pure feedback system. The resulting closed-loop system consists of controller-filter pair, which both satisfy the input-to-state stability(ISS) property, providing the celebrated small-gain theorem can be exploited to guarantee the stability of closed-loop system. Referring to the issue of non-linearly parameterized uncertainty, adaptive laws are derived via Immersion and Invariance technique. Numerical simulations are included to illustrate the effectiveness of proposed control scheme.

关键词： Command filtered backstepping,Immersion and Invariance,Pure feedback System,Non-linearly Parameterized Uncertainty

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Stability analysis of discrete-time linear systems with unbounded stochastic delays 5

Stability analysis of discrete-time linear systems with unbo...

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5th IFAC Workshop on Distributed Estimation and control in Networked systems, NecSys 2015

作者： Demirel, Burak Feyzmahdavian, Hamid Reza Ghadimi, Euhanna Johansson, Mikael Department of Automatic Control School of Electrical Engineering KTH Royal Institute of Technology StockholmSE-10044 Sweden

This paper investigates the stability of discrete-time linear systems with stochastic delays. We assume that delays are modeled as random variables, which take values in integers with a certain probability. For the scalar case, we provide an analytical bound on the probability to guarantee the stability of linear systems. In the vector case, we derive a linear matrix inequality condition to compute the probability for ensuring the stability of closed-loop systems. As a special case, we also determine the step size of gradient algorithms with stochastic delays in the unconstrained quadratic programming to guarantee convergence to the optimal solution. Numerical examples are provided to show the effectiveness of the proposed analysis techniques. © 2015, IFAC (International Federation of automatic control) Hosting by Elsevier Ltd. All rights reserved.

关键词： Networked control systems

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A study on fault-tolerant operation of a two-phase permanent magnet synchronous motor based on structual alteration

A study on fault-tolerant operation of a two-phase permanent...

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IEEE Conference on Electromagnetic Field Computation

作者： Hai Lin Fei Zhao T. A. Lipo Byung-il Kwon School of Electronic and Control Engineering Chang'an University Xian China Harbin Institute of Technology Shenzhen Graduate School Shenzhen China Department of Electrical and Computer Engineering Florida State University Tallahassee FL USA Department of Electronic Systems Engineering Hanyang University Ansan Korea

ISBN: (纸本)9781509010332

The paper proposes a fault-tolerant control strategy for a two-phase permanent magnet synchronous motor (PMSM) by a structural alteration. Firstly, a two-phase PMSM is designed with a structure of combination with two conventional single-phase U-core PMSMs. Each has a self-start ability because of the step air gap design on the inner side of stator, and two sets of magnet in the motor are placed as 90 electrical angle shift. If one is fault, the other can work continually. Secondly, a drive with the space vector modulation (SVM) technique is designed for the proposed system. Considering the possible faults, a fault-tolerant technique is proposed to improve the system robustness. The experimental results show the validity of the proposed system.

关键词： Fault tolerance Fault tolerant systems Permanent magnet motors Inverters Synchronous motors Stator windings

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Weak Resilience of Networked control systems

Weak Resilience of Networked Control Systems

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European control Conference

作者： Tomonori Sadamoto Henrik Sandberg Bart Besselink Takayuki Ishizaki Jun-ichi Imura Karl Henrik Johansson Department of Mechanical and Environmental Informatics Graduate School of Information Science and Engineering Tokyo Institute of Technology 2-12-1 Meguro Tokyo Japan School of Electrical Engineering Automatic Control Royal Institute of Technology (KTH) SE-100 44 Stockholm Sweden

ISBN: (纸本)9781509025923

In this paper, we propose a method to establish a networked control system that maintains its stability in the presence of certain undesirable incidents on local controllers. We call such networked control systems weakly resilient. We first derive a necessary and sufficient condition for the weak resilience of networked systems. Networked systems do not generally satisfy this condition. Therefore, we provide a method for designing a compensator which ensures the weak resilience of the compensated system. Finally, we illustrate the efficiency of the proposed method by a power system example based on the IEEE 14-bus test system.

关键词： Weak Resilience Networked control systems proposed method

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