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Conference Record of the IEEE Industry Applications Society Annual Meeting (IAS)

作者： Wenchao Xue Rafal Madonski Zhiqiang Gao Yi Huang Krzysztof Lakomy Key laboratory of Systems and Control Chinese Academy of Sciences Beijing P. R. China Chair of Control and Systems Engineering Poznan University of Technology Poland Department of Electrical and Computer Engineering Cleveland State University Cleveland Ohio U.S.A.

ISBN: (纸本)9781479983988

Active Disturbance Rejection control (ADRC) as a standalone motion solution has been adopted by companies such as Texas Instruments and Danfoss and made available on various proprietary industrial platforms. The idea of ADRC, however, can be integrated with the existing control technologies seamlessly, as shown in this paper. It is shown a modularized ADRC design for set-point tracking of motion control such that better uncertainty rejection can be implemented without any change in the existing proportional-derivative (PD) control with linear observer. We prove that certain integration of the observer's error can serve as an estimation for the “total disturbance” in low frequency range. This enables the estimation and cancellation of the “total disturbance” to be incorporated into the existing control loop. Also, a comparison between the methods with and without such “module” is discussed. The proposed ADRC is implemented and validated with experimental results for a 1-degree of freedom robotic manipulator, where desired set-point tracking performance in position control is achieved under unknown mass variations and sudden external disturbances.

关键词： Observers Motion control Tracking Transient analysis

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Reweighted nuclear norm regularization: A SPARSEVA approach

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IFAC-PapersOnLine 2015年第28期48卷 1172-1177页

作者： Ha, Huong Welsh, James S. Blomberg, Niclas Rojas, Cristian R. Wahlberg, Bo School of Electrical Engineering and Computer Science The University of Newcastle Technologiepark 913 B-9052 Gent Australia Department of Automatic Control and ACCESS School of Electrical Engineering KTH Royal Institute of Technology StockholmSE-100 44 Sweden

The aim of this paper is to develop a method to estimate high order FIR and ARX models using least squares with re-weighted nuclear norm regularization. Typically, the choice of the tuning parameter in the reweighting scheme is computationally expensive, hence we propose the use of the SPARSEVA (SPARSe Estimation based on a VAlidation criterion) framework to overcome this problem. Furthermore, we suggest the use of the prediction error criterion (PEC) to select the tuning parameter in the SPARSEVA algorithm. Numerical examples demonstrate the veracity of this method which has close ties with the traditional technique of cross validation, but using much less computations. © 2015

关键词： Parameter estimation Digital control systems Discrete time control systems Identification (control systems) Least squares approximations Numerical methods Discrete time systems Nuclear norm regularizations Nuclear norms regularization sparse estimate Sparse estimation Traditional techniques Validation criteria

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H∞ control problem for discrete-time algebraic dynamical systems

H∞ control problem for discrete-time algebraic dynamical sy...

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作者： Tudor, Sebastian F. Oarə, Cristian Department of Automatic Control and Systems Engineering University Politehnica of Bucharest BucharestRO-060042 Romania

This paper considers the suboptimal H∞ control problem for linear discrete-time algebraic dynamical systems. Such systems can be formally described as linear and time-invariant discrete-time systems, whose transfer function matrix is allowed to be improper or polynomial. The parametrization of output feedback controllers is given in a realization-based setting involving two generalized algebraic Riccati equations and features the same elegant simplicity of the standard (proper) case. Two relevant numerical examples prove the effectiveneß of our approach. © 2015 Society for Industrial and Applied Mathematics.

关键词： Robust control

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Axisymmetric modes in magnetic flux tubes with internal and external magnetic twist

arXiv

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arXiv 2017年

作者： Giagkiozis, I. Fedun, V. Erdélyi, R. Verth, G. Solar Plasma Physics Research Centre School of Mathematics and Statistics University of Sheffield Hicks Building Hounsfield Road SheffieldS3 7RH United Kingdom Department of Automatic Control and Systems Engineering University of Sheffield Amy Johnson Building Mappin Street SheffieldS1 3JD United Kingdom Research Centre for Astronomy and Earth Sciences Hungarian Academy of Sciences P.O.Box 30 DebrecenH-4010 Hungary

Observations suggest that twisted magnetic flux tubes are ubiquitous in the Sun’s atmosphere. The main aim of this work is to advance the study of axisymmetric modes of magnetic flux tubes by modeling both twisted internal and external magnetic field, when the magnetic twist is weak. In this work, we solve the derived wave equations numerically assuming twist outside the tube is inversely proportional to the distance from its boundary. We also study the case of constant magnetic twist outside the tube and solve these equations analytically. We show that the solution for a constant twist outside the tube is a good approximation to the case where the magnetic twist is proportional to 1/r, namely the error is in all cases less than 5.4%.The solution is in excellent agreement with solutions to simpler models of twisted magnetic flux tubes, i.e. without external magnetic twist. It is shown that axisymmetric Alfvén waves are naturally coupled with magnetic twist as the azimuthal component of the velocity perturbation is nonzero. We compared our theoretical results with observations and comment on what the Doppler signature of these modes is expected to be. Lastly, we argue that the character of axisymmetric waves in twisted magnetic flux tubes can lead to false positives in identifying observations with axisymmetric Alfvén waves. Copyright © 2017, The Authors. All rights reserved.

关键词： Wave equations

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Magnetic swirls and associated fast magnetoacoustic kink waves in a solar chromospheric flux tube

arXiv

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arXiv 2017年

作者： Murawski, K. Kayshap, P. Srivastava, A.K. Pascoe, D.J. Jelínek, P. Kuźma, B. Fedun, V. Maria Curie-Sklodowska University Institute of Physics Group of Astrophysics Radziszewskiego 10 LublinPL–20 031 Poland Centre for Fusion Space and Astrophysics Department of Physics University of Warwick CV4 7AL United Kingdom Department of Physics Indian Institute of Technology Banaras Hindu University Varanasi221005 India University of South Bohemia Faculty of Science Institute of Physics and Biophysics Branišovská 1760 České BudějoviceCZ – 370 05 Czech Republic Space Systems Laboratory Department of Automatic Control and Systems Engineering University of Sheffield SheffieldS1 3JD United Kingdom

We perform numerical simulations of impulsively generated magnetic swirls in an isolated flux tube which is rooted in the solar photosphere. These swirls are triggered by an initial pulse in a horizontal component of the velocity. The initial pulse is launched either: (a) centrally, within the localized magnetic flux tube;or (b) off-central, in the ambient medium. The evolution and dynamics of the flux tube is described by three-dimensional, ideal magnetohydrodynamic equations. These equations are numerically solved to reveal that in case (a) dipole-like swirls associated with the fast magnetoacoustic kink and m = 1 Alfvén waves are generated. In case (b), the fast magnetoacoustic kink and m = 0 Alfvén modes are excited. In both these cases, the excited fast magnetoacoustic kink and Alfvén waves consist of similar flow pattern and magnetic shells are also generated with clockwise and counter-clockwise rotating plasma within them, which can be the proxy of dipole-shaped chromospheric swirls. The complex dynamics of vortices and wave perturbations reveals the channelling of sufficient amount of energy to fulfill energy losses in the chromosphere (∼ 104 W m−1) and in the corona (∼ 102 W m−1). Some of these numerical findings are reminiscent of signatures in recent observational data. Copyright © 2017, The Authors. All rights reserved.

关键词： Magnetic flux

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Wind Turbine Power control Based on Aero Dynamical Torque Estimation

Wind Turbine Power Control Based on Aero Dynamical Torque Es...

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International Conference on Cybernetics and Informatics

作者： Teofana Puleva Jakub Osusky Department of Systems and Control Faculty of Automatics Technical University of Sofia Institute of Automotive Mechatronics Faculty of Electrical Engineering and Information Technology Slovak University of Technology

ISBN: (纸本)9781509018352

In this paper a two-region power control system of wind turbine generator by aero dynamical torque estimation is presented. It is based on adaptive observer design augmented with an extra integral state. This observer exhibits adaptive features with respect to the external forces applied to the plant (such as aero dynamical torque variation). The simulation results show the control system good efficiency combined with a simple implementation.

关键词： Wind generator Two-regime control system Adaptive observer Aerodynamical torque estimation

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The status of KAGRA underground cryogenic gravitational wave telescope

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Journal of Physics: Conference Series 2019年第1期1342卷

作者： T. Akutsu M. Ando A. Araya N. Aritomi H. Asada Y. Aso S. Atsuta K. Awai M. A. Barton K. Cannon K. Craig W. Creus K. Doi K. Eda Y. Enomoto R. Flaminio Y. Fujii M.-K. Fujimoto T. Furuhata S. Haino K. Hasegawa K. Hashino K. Hayama S. Hirobayashi E. Hirose A. H. Hsieh Y. Inoue K. Ioka Y. Itoh T. Kaji T. Kajita M. Kakizaki M. Kamiizumi S. Kambara N. Kanda S. Kanemura M. Kaneyama G. Kang J. Kasuya Y. Kataoka N. Kawai S. Kawamura C. Kim H. Kim J. Kim Y. Kim N. Kimura T. Kinugawa S. Kirii Y. Kitaoka Y. Kojima K. Kokeyama K. Komori K. Kotake R. Kumar H. Lee Y. Liu N. Luca E. Majorana S. Mano M. Marchio T. Matsui F. Matsushima Y. Michimura O. Miyakawa T. Miyamoto A. Miyamoto K. Miyo S. Miyoki W. Morii S. Morisaki Y. Moriwaki T. Morozumi M. Musha S. Nagano K. Nagano K. Nakamura T. Nakamura H. Nakano M. Nakano K. Nakao T. Narikawa L.Nguyen Quynh W.-T. Ni T. Ochi J. Oh S. Oh M. Ohashi N. Ohishi M. Ohkawa K. Okutomi K. Oohara F. E.Peña Alleano I. Pinto N. Sago M. Saijo Y. Saito K. Sakai Y. Sakai Y. Sasaki M. Sasaki S. Sato T. Sato Y. Sekiguchi N. Seto M. Shibata T. Shimoda H. Shinkai A. Shoda K. Somiya E. Son A. Suemasa T. Suzuki H. Tagoshi H. Takahashi R. Takahashi A. Takamori H. Takeda H. Tanaka K. Tanaka T. Tanaka D. Tatsumi T. Tomaru T. Tomura F. Travasso K. Tsubono S. Tsuchida N. Uchikata T. Uchiyama T. Uehara S. Ueki K. Ueno T. Ushiba M. H. P. M. van Putten H. Vocca S. Wada T. Wakamatsu T. Yamada S. Yamamoto T. Yamamoto K. Yamamoto A. Yamamoto J. Yokoyama T. Yokozawa T. H. Yoon H. Yuzurihara S. Zeidler Z.-H. Zhu KAGRA Collaboration National Astronomical Observatory of Japan Mitaka Tokyo 181-8588 Japan Department of Physics University of Tokyo Bunkyo Tokyo 113-0033 Japan Earthquake Research Institute University of Tokyo Bunkyo Tokyo 113-0032 Japan Department of Advanced Physics Hirosaki University Hirosaki Aomori 036-8561 Japan National Astronomical Observatory of Japan Hida Gifu 506-1205 Japan Department of Physics Tokyo Institute of Technology Meguro Tokyo 152-8551 Japan Institute for Cosmic Ray Research University of Tokyo Hida Gifu 506-1205 Japan Research Center for the Early Universe University of Tokyo Bunkyo Tokyo 113-0033 Japan Institute for Cosmic Ray Research University of Tokyo Kashiwa Chiba 277-8582 Japan Institute of Physics Academia Sinica Nankang Taipei 11529 Taiwan Department of Physics University of Toyama Toyama Toyama 930-8555 Japan Faculty of Engineering University of Toyama Toyama Toyama 930-8555 Japan Yukawa Institute for Theoretical Physics Kyoto University Sakyo Kyoto 606-8502 Japan Department of Physics Osaka City University Sumiyosi Osaka 558-8585 Japan Department of Physics Osaka University Toyonaka Osaka 560-0043 Japan Korea Institute of Science and Technology Information Yuseong Daejeon 34141 Korea Korea Astronomy and Space Science Institute (KASI) Yuseong Daejeon 34055 Korea National Institute for Mathematical Sciences Daejeon 34047 Korea Department of Computer Simulation Inje University Gimhae Gyeongsangnam 50834 Korea Department of Physics and Astronomy Seoul National University Seoul 151-742 Korea High Energy Accelerator Research Organization Tsukuba Ibaraki 305-0801 Japan Department of Physical Science Hiroshima University Higashihiroshima Hiroshima 903-0213 Japan Department of Applied Physics Fukuoka University Jonan Fukuoka 814-0180 Japan Department of Advanced Materials Science University of Tokyo Kashiwa Chiba 277-8582 Japan Istituto Nazionale di Fisica Nucleare Sapienza University Roma 00185 Italy Department of Ma

KAGRA is a 3-km interferometric gravitational wave telescope located in the Kamioka mine in Japan. It is the first km-class gravitational wave telescope constructed underground to reduce seismic noise, and the first km-class telescope to use cryogenic cooling of test masses to reduce thermal noise. The construction of the infrastructure to house the interferometer in the tunnel, and the initial phase operation of the interferometer with a simple 3-km Michelson configuration have been completed. The first cryogenic operation is expected in 2018, and the observing runs with a full interferometer are expected in 2020s. The basic interferometer configuration and the current status of KAGRA are described.

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Optimal control of Segway personal transporter

Optimal control of Segway personal transporter

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International Conference on control, Instrumentation, and Automation

作者： Reza Babazadeh Ataollah Gogani Khiabani Hadi Azmi Department of Systems and Control K.N. Toosi University of Technology Tehran Iran Electrical Engineering Faculty Sahand University of Technology Tabriz Iran

In this paper an optimal controller is proposed for a self-balancing electrical vehicle called Segway PT. This vehicle has one platform and two wheels on the sides and the rider stands on the platform. A handlebar, as a navigator, is attached to the body of Segway, with which the rider controls the vehicle. Since Segway uses electrical energy produced by batteries, resource consumption management is of utmost importance. On the other hand, complex nonlinear dynamics cause difficulties in controlling the vehicle. Our proposed controller reduces energy consumption and enhance response speed of system instead of classic PID controller which proposed before. Simulation results show the desired performance of the proposed controller.

关键词： Mathematical model Wheels DC motors Optimal control Vehicles State feedback

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Integration of a predictive control model and MPPT for PV station

Integration of a predictive control model and MPPT for PV st...

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International Conference on Smart systems and Technologies (SST)

作者： Imad Elzein Yury N. Petrenko Department of Computer Science and Information Technology Lebanese International University Beirut Lebanon Department of Electrical Engineering and Control systems Belarusian National Technical University Minsk Belarus

ISBN: (纸本)9781509037216

Although many researchers were reviewing studying and evaluating the methods and the properties of reaching and tracking the maximum power that can be obtained as a PV solar system is involved using multi algorithmic maximum power point tracking systems MPPT this literature is focusing and logically analyzing the ability to deliver the ultimate maximum power as an MPPT is involved in photovoltaic plant, which would eventually lead to find this maximum power, Pmax, and to reach this goal this paper will touch base the duty ratio “D” for the various and different sorts of the well known converters and their respective associate loads. In a nutshell we will stress out and address an appliede MPPT to serve standalone photovoltaic power generation module.. The module or the system that will be targeted will be composed of a solar array which is well known to have nonlinear time varying properties, and for sure as an integral part of this system there will be a step up converter with a convenient filter. The integration of predictive control model for the discussed MPPT was addressed in this paper along with its characteristics and advantages.

关键词： Maximum power point trackers Predictive control Computational modeling Predictive models Solar panels

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On Nonlinear Observer Parameterizations and Its Application to Fault Detection

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IFAC-PapersOnLine 2015年第21期48卷 1060-1065页

作者： Li, Linlin Ding, Steven X. Yang, Ying Zhang, Yong Dominic, Shane Institute for Automatic Control and Complex Systems Faculty of Engineering University of Duisburg-Essen Duisburg 47057 Germany State Key Lab for Turbulence and Complex Systems Department of Mechanics and Engineering Science College of Engineering Peking University Beijing 100871 China

This paper investigates observer parameterizations and its application to observer-based fault detection for nonlinear systems. With the aid of coprime factorization techniques, the observer parameterization forms are first derived in terms of input-to-output approach and state space representation. To further implement the methodology, one design scheme is proposed for the so-called affine nonlinear systems. Then, the application of the proposed observer parameterization form to observer-based fault detection is studied. In the end, a numerical example is given to demonstrate the efficiency of our proposed scheme. © 2015

关键词： Fault detection

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