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2011 4th International Conference on Biomedical engineering and Informatics, BMEI 2011

作者： Wang, Min Wang, Bei Zou, Junzhong Zhang, Jian Nakamura, Masatoshi Department of Automation School of Information Science and Engineering East China University of Science and Technology Shanghai 200237 China Department of Advanced System Control Engineering Saga University Saga 840-8502 Japan

ISBN: (纸本)9781424493524

Parkinson's disease (PD) is a common movement disorder caused from the neurological dysfunction in basal ganglia. Patients with Parkinson's disease have serious movement problems, such as movement disorders, tremor and rigidity. In this study, a new technique of hand movement compensation for patients with Parkinson's disease based on spiral drawing tasks was proposed. In order to extract the hand movement feature of patients with Parkinson's disease, the polar coordination system with varied origin was used to gain characteristic parameters more accurately. The compensation model was constructed by using the parameters obtained in spiral drawing tasks, and we also do simulation under this model to verify the effectiveness. The simulation results proved that the proposed compensation technique will be effective for assisting the movement of patients with Parkinson's disease. © 2011 IEEE.

关键词： Neurodegenerative diseases

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Improvement of Back-EMF waveform by adjusting pole angle in surface-mounted permanent magnet synchronous machinetype Generatorfor Fly-Wheel 28

Improvement of Back-EMF waveform by adjusting pole angle in ...

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28th International Electric Vehicle Exhibition, EVS 2015

作者： Shin, Young-Jin Gi, Joon-Woo Yoon, Myung-Hwan Chai, Seung-Hee Hong, Jung-Pyo Department of Automotive Electronic Control Engineering Hanyang University Seoul Korea Republic of Department of Advanced Power Conversion System Engineering Hanyang University Seoul Korea Republic of Department of Automotive Engineering Hanyang University Seoul Korea Republic of

ISBN: (纸本)9781510809260

This paper proposes a method to improve the waveform of the back-EMF to obtain sinusoidal waveform. The improvement of back-EMF waveform has many advantages such as reduction of torque ripple, noise and vibration. A dent is discovered from the middle of the back-EMF waveform of the Surface-Mounted Permanent Magnet Synchronous Machine (SPM) type vehicle-generator. This phenomenon occurred due to the flux leakage and causes higher total harmonic distortion (THD). The flux leakage variation occurs due to the relative position between permanent magnet and teeth. A method of widening intervals of the permanent magnets is suggested for the solution of this problem. The flux leakage can be constant as permanent magnet interval is wider than slot opening. This solution is applied to the target generator and THD reduction of back-EMF is confirmed. Not only THD reduced from 19.5% to 5.8% but also the torque ripple reduced by more than 30%. The proposed method is verified by the results of finite element analysis.

关键词： Permanent magnets

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Distributed Nash Equilibrium Seeking in Coalition Games for Uncertain Euler-Lagrange systems With Application to USV Swarm Confrontation

arXiv

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arXiv 2025年

作者： Yuwen, Cheng Wen, Guanghui Zhou, Jialing Luan, Meng Huang, Tingwen School of Automation Southeast University Nanjing210096 China State Key Laboratory of CNS/ATM Beijing Institute of Technology Beijing519088 China Department of System Science School of Mathematics Southeast University Nanjing211189 China Faculty of Computer Science and Control Engineering Shenzhen University of Advanced Technology Shenzhen218055 China

In this paper, a coalition game with local and coupling constraints is studied for uncertain Euler-Lagrange (EL) systems subject to disturbances with unknown bounds. In the coalition game, each agent collaborates with other agents within the same coalition to optimize its coalition’s cost function while simultaneously competing against agents in other coalitions. Under a distributed framework where each agent has access only to its own action, cost function, and constraint parameters, a distributed strategy is proposed to seek the Nash equilibrium (NE). By combining adaptive methods and sign functions, model uncertainties and disturbances with unknown bounds in the EL system are compensated and suppressed, respectively. Furthermore, an integration of adaptive methods and consensus protocols is employed to update the Lagrange multipliers of both local and coupling constraints. A dynamic average consensus is employed to estimate the gradient of coalition function, while the leader-following protocol is adopted to estimate the actions of other agents. By leveraging Lyapunov theory, the NE is proven to be asymptotically stable. Moreover, an unmanned surface vehicle swarm confrontation is meticulously modeled and analyzed in the coalition game framework. A diverse array of tasks, including formation, encirclement, and interception, are systematically formulated. A numerical example demonstrates the effectiveness of the proposed algorithm. Copyright © 2025, The Authors. All rights reserved.

关键词： Lagrange multipliers

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A theoretical and deep learning hybrid model for predicting surface roughness of diamond-turned polycrystalline materials

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International Journal of Extreme Manufacturing 2023年第3期5卷 620-644页

作者： Chunlei He Jiwang Yan Shuqi Wang Shuo Zhang Guang Chen Chengzu Ren Tianjin Key Laboratory of Equipment Design and Manufacturing Technology Department of Mechanical EngineeringTianjin UniversityTianjin 30054People’s Republic of China Department of Mechanical Engineering Keio UniversityYokohama 223-8522Japan Tianjin Key Laboratory of the Design and Intelligent Control of the Advanced Mechatronical System School of Mechanical EngineeringTianjin University of TechnologyTianjin 300384People’s Republic of China School of Mechanical Engineering Yanshan UniversityQinhuangdao 066004People’s Republic of China

Polycrystalline materials are extensively employed in *** surface roughness significantly affects the working *** defects,particularly grain boundaries,have a great impact on the achieved surface roughness of polycrystalline ***,it is difficult to establish a purely theoretical model for surface roughness with consideration of the grain boundary effect using conventional analytical *** this work,a theoretical and deep learning hybrid model for predicting the surface roughness of diamond-turned polycrystalline materials is *** kinematic–dynamic roughness component in relation to the tool profile duplication effect,work material plastic side flow,relative vibration between the diamond tool and workpiece,etc,is theoretically *** material-defect roughness component is modeled with a cascade forward neural *** the neural network,the ratio of maximum undeformed chip thickness to cutting edge radius RT S,work material properties(misorientation angle θ_(g) and grain size d_(g)),and spindle rotation speed n s are configured as input *** material-defect roughness component is set as the output *** validate the developed model,polycrystalline copper with a gradient distribution of grains prepared by friction stir processing is machined with various processing parameters and different diamond *** with the previously developed model,obvious improvement in the prediction accuracy is observed with this hybrid prediction *** on this model,the influences of different factors on the surface roughness of polycrystalline materials are *** influencing mechanism of the misorientation angle and grain size is quantitatively *** fracture modes,including transcrystalline and intercrystalline fractures at different RTS values,are ***,optimal processing parameters are obtained with a simulated annealing *** experiments are performed with

关键词： diamond turning material-defect roughness component polycrystalline copper neural network simulated annealing algorithm

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Induction in Optimal control of Multiple-Kite Airborne Wind Energy systems

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IFAC-PapersOnLine 2017年第1期50卷 153-158页

作者： Leuthold R. Gros S. Diehl M. Systems Control and Optimization Laboratory Dept. of Microsystems Engineering Dept. of Mathematics University of Freiburg Germany Department of Signals and System Chalmers University Freiburg Institute for Advanced Studies Sweden

Multiple-kite Airborne Wind Energy systems (MAWES) aim to decrease inter-mittency and cost over conventional wind turbines, while generating more power than other airborne wind energy systems. The purpose of this work is to estimate whether axial and angular induction are relevant phenomena in the modelling of pumping-cycle MAWES with two or more kites. Considering the modelling assumptions, axial induction is a relevant phenomenon and leads to significant changes in design-point, especially with respect to kite mass and secondary tether length. However, angular induction can be neglected in modelling for optimal design and control problems. © 2017

关键词： airborne wind energy blade-element momentum method induction model reduction optimum power generation systems design windmills

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A nonlinear plant control by means of simulator-based foresight control

A nonlinear plant control by means of simulator-based foresi...

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ICROS-SICE International Joint Conference 2009, ICCAS-SICE 2009

作者： Zhang, Tao Uchida, Motomiki Nakamura, Masatoshi Department of Automation Tsinghua University Beijing 100084 China Fukuoka Institute of Technology Fukuoka Japan Department of Advanced System Control Engineering Saga University Saga 840-8502 Japan

ISBN: (纸本)9784907764333

This paper proposes a simulator-based foresight control approach for nonlinear plant based on system identification. In the proposed method, as a main part of the simulator-based foresight control system, a simulator of an exact plant model of non-affine nonlinear plant is first constructed. If relative degree of disturbance is smaller than control input, servo type filter will be then installed in series of disturbance line in order to adjust relative degree. Next, a control target equation which defines pole assignment for stable output error convergence is determined. Based on this control target equation, the control input for non-affine type nonlinear plant is generated. In this paper, the control of a boiler was implemented by use of the proposed method. The simulation results verified the effectiveness of the proposed method. © 2009 SICE.

关键词： Simulators

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Designing of a static frequency observer for GMAW process in the globular transfer mode

Designing of a static frequency observer for GMAW process in...

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作者： Khalili, Mohsen Haeri, Mohammad Tipi, Ali Reza Doodman Advanced Control System Lab. Electrical Engineering Department Sharif University of Technology Tehran Iran Kermanshah University of Technology Kermanshah Iran

ISBN: (纸本)9781424474530

In the welding process, droplet detachment regularity is important for a good welding quality. The frequency of detachment is one of influential indices for assessing the quality of GMAW in the globular transfer mode. In this paper, a relationship is estimated for measuring droplet detachment frequency in the globular GMAW. The droplet detachment frequency is estimated with a curve fitting by the least squares error (LSE) method. By using short time frequency transform (STFT) we can extract the frequency contents from the mass of drop that is one of the states in the welding model. ©ICROS.

关键词： Curve fitting

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The Effect of Fractional Order on Oscillatory Behavior of Scalar Fractional Delay systems of Neutral Type

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IFAC Proceedings Volumes 2013年第1期46卷 480-485页

作者： Afshin Mesbahi Mohammad Haeri Advanced Control System Lab Department of Electrical Engineering Sharif University of Technology Tehran Iran

The undamped oscillations of a scalar fractional neutral system are studied in this paper. For this purpose, it is proved that this kind of systems can have the oscillatory behavior. The necessary and sufficient condition is proposed to determine that there exists a delay value for which the system oscillates. The frequency, amplitude and required delay for the undamped oscillations depend on the fractional order. However, the behavior of dependencies is not specified. Indeed, when the system has oscillatory behavior, it is bounded-input bounded-output stable for delay less than the required delay. Moreover, when the order is approaching to an integer value, the necessary and sufficient condition is proposed to determine that the system can oscillate with the bounded value of delay. The obtained results are verified with respect to the classical theorems. Finally, two numerical examples demonstrate the proposed conditions.

关键词： Linear fractional order system oscillation frequency analysis asymptotic properties

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Robust Semi-Global Leaderless Consensus and Containment control of Identical Linear systems with Imperfect Actuators

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Journal of systems Science & Complexity 2018年第1期31卷 69-86页

作者： SHI Liangren ZHAO Zhiyun LIN Zongli Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information Processing of Ministry of Education Shanghai 200240 China Key Laboratory of Advanced Control and Optimization for Chemical Processes (East China University of Science and Technology) Ministry of Education Shanghai 200237 China Charles L. Brown Department of Electrical and Computer Engineering University of Virginia P.O. Box 400743 Charlottesville VA 22904-4743 USA

This paper investigates both the robust semi-global leaderless consensus problem and the robust semi-global containment control problem for a group of identical linear systems with imperfect actuators. The imperfect actuators are characterized by nonlinearities such as saturation and dead zone and there input output relationships are not precisely known. The dynamics of follower agents are also affected by the input additive disturbances. Low-and-high gain feedback consensus protocols are constructed to solve these problems. More specifically, it is shown that robust semi-global leaderless consensus can be achieved over a connected undirected graph and robust semi-global containment control can be achieved when each follower agent has access to the information of at least one leader agent. Numerical simulation illustrates the theoretical results.

关键词： Consensus containment control dead zone leaderless consensus multi-agent systems saturation

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Simple on-line observation and compensation of dead-time effects

Simple on-line observation and compensation of dead-time eff...

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14th International Conference on Railway engineering Design and Optimization, COMPRAIL 2014

作者： Jung, S.M. Park, C.B. Kim, J.H. Lee, S.H. Kim, H.W. Advanced Traction and Noncontact Feeding System Research Team Korea Railroad Research Institute Korea Republic of Department of Control and Instrumentation Engineering Korea National University of Transportation Korea Republic of

ISBN: (纸本)9781845647667

Generally, there exist voltage differences between the voltage commands and the output voltages of the three-phase pulse-width modulated (PWM) voltage-source inverter (VSI), which are caused by the intended dead-time to prevent the armshort of a leg and the nonlinearities of switching devices. These voltage differences (or voltage distortion) affect the current distortion, torque pulsations, and degradation of control performances. To overcome these drawbacks, a simple and low-cost observation and compensation method of the voltage distortion is proposed. The proposed method is employing model reference adaptive system (MRAS) techniques and does not require any additional hardware circuits such as voltage sensors. The voltage distortions caused by the nonlinearities of the switching devices are estimated by a voltage distortion observer which is based on the electrical model of the PMSM. And the estimated voltage distortions are fed-forward to compensate the voltage commands. In comparison with the previous existing methods, the proposed method has a simple structure and good performances. Also, it can be implemented without any extra devices such as voltage sensors and the computing effort is very small. The execution of the algorithm can be easily embedded in the existing systems without major modification. To show the effectiveness of the proposed method, the experiments are carried out for the digitally controlled PMSM drive system. The experimental results verify the validity of the proposed method and show that the proposed method gives good performance and practical value. © 2014 WIT Press.

关键词： Electric inverters

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