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44th Annual Conference of the IEEE Industrial Electronics Society, IECON 2018

作者： Chaves, Emanoel R.Q. Maitelli, André L. Lopes, Kennedy R. Andrade, Ana C.C. De Lima, Bernardo F.A. Department of Computing Engineering and Automation Federal University of Rio Grande do Norte Natal RN Brazil Laboratory of Automation in Petroleum Natal RN Brazil

ISBN: (纸本)9781509066841

In this paper, a robust fault estimation technique is proposed to estimate the states and sensor faults simultaneously in a discrete-time Takagi-Sugeno (TS) fuzzy system with uncertainties. Initially, an augmented system is obtained from fault dynamics model and from the original system. Then an robust TS fuzzy unknown input observer (UIO) is designed for the augmented system with the aim of performing decoupling of the process disturbances. The UIO design is achieved by an H∞ technique, which is developed to maintain the UIO stable and to reduce the disturbances that cannot be decoupled. The proposed method is validated through a simulation example. © 2018 IEEE.

关键词： Uncertainty analysis

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Experimental research on rotor fault diagnosis using external coil voltage analysis and shaft voltage signal analysis

Experimental research on rotor fault diagnosis using externa...

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International Symposium on Diagnostics of Electric Machines, Power Electronics, and Drives, SDEMPED 2005

作者： Miletic, Alan Cettolo, Mirko Faculty of Electrical Engineering and Computing Department Electric MachinesDrives and Automation Unska 3 10000 Zagreb Croatia

ISBN: (纸本)0780391241

Induction motors are nowadays used more frequently than any other electric motor in various kinds of electric drives. Incipient fault diagnosis is very important because if the fault is undetected, small motor failure can lead to serious motor failure. Although several sophisticated fault detection methods can be found in literature and practice, the focus of this paper are two methods that could be used "on-line" in real-life situations, and can be performed in a short time. The experiments have been performed by analyzing the voltage in an external search coil, and the shaft voltage. In the case of the search coil voltage analysis, the tests were performed for six different search coil positions. The search coil voltage spectral analysis has also been performed. All tests were performed on 22 kW, 380 V, 1470 r/min induction motor, for the case of a healthy rotor and for the case of a rotor with different deliberately damaged rotor. ©2005 IEEE.

关键词： Induction motors

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Comparison of expected and measured values of luminance sensors in dual-axis photovoltaic positioning system

Comparison of expected and measured values of luminance sens...

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International Conference on Electrical Machines

作者： Petrović, Igor Gašparac, Ivan Vražić, Mario Betatim Pitomaca Croatia Department of Electrical Machines and Automation Faculty of Electrical Engineering and Computing University of Zagreb Croatia

ISBN: (纸本)9781424441754

A dual-axis photovoltaic positioning system has a primary task of directing a PV module towards the optimal light source. The idea of positioning a loop requires proper information on the PV module direction in order to get more insolation, i.e. more energy. The assumption of a proper luminance sensor distribution and position is described in this paper. With this distribution every angle position is described by a unique combination of luminance sensor readings. This paper compares expected readings and measured readings of a real mechanical model. ©2010 IEEE.

关键词： Luminance

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Tool for remote control of mobile robots with visualization by means of virtual reality 7

Tool for remote control of mobile robots with visualization ...

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7th International Conference on Telecommunications, ConTEL 2003

作者： Brščić, Dražen University of Zagreb Faculty of Electrical Engineering and Computing Department of Control and Computer Engineering in Automation Unska 3 ZagrebHR-10000 Croatia

ISBN: (纸本)9531840520

This paper presents the current work on the development of a tool for remote control of mobile robots. The tool consists of a local controller on the robot side and a user interface for simulation and remote control that connects with the robot through the network. The user interface is implemented as an HTML page with a Java applet for remote control and communication and a virtual environment written in VRML for visualization. This way users have the ability to connect to a dedicated WWW server and download the user interface. This paper describes the concept of the tool design and the developed user interface. © 2003, Institute of Electrical and Electronics Engineers Inc. All rights reserved.

关键词： Visualization

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Hypervelocity impact induced shock acoustic emission waves for quantitative damage evaluation using in situ miniaturized piezoelectric sensor network

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Chinese Journal of Aeronautics 2019年第5期32卷 1059-1070页

作者： Menglong LIU Qiang WANG Qingming ZHANG Renrong LONG Fangsen CUI Zhongqing SU Institute of High Performance Computing A*STAR (Agency for Science Technology and Research) School of Automation Nanjing University of Posts and Telecommunications State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Institute of High Performance Computing (A*STAR Agency for Science Technology and Research) Department of Mechanical Engineering The Hong Kong Polytechnic University

Manmade debris and natural meteoroids, travelling in the Low Earth Orbit at a speed of several kilometers per second, pose a severe safety concern to the spacecraft in service through the HyperVelocity Impact(HVI). To address this issue, an investigation of shock Acoustic Emission(AE) waves induced by HVI to a downscaled two-layer Whipple shielding structure is performed,to realize a quantitative damage evaluation. Firstly a hybrid numerical model integrating smoothparticle hydrodynamics and finite element is built to obtain the wave response. The projectiles, with various impact velocities and directions, are modelled to impact the shielding structure with different thicknesses. Then experimental validation is carried out with built-in miniaturized piezoelectric sensors to in situ sense the HVI-induced AE waves. A quantitative agreement is obtained between numerical and experimental results, demonstrating the correctness of the hybrid model and facilitating the explanation of obtained AE signals in experiment. Based on the understanding of HVI-induced wave components, assessment of the damage severity, i.e., whether the outer shielding layer is perforated or not, is performed using the energy ratio between the regions of ‘‘high frequency" and ‘‘low frequency" in the acquired AE signals. Lastly, the direct-arrival fundamentalsymmetric wave mode is isolated from each sensing signal to be input into an enhanced delay-andsum algorithm, which visualizes HVI spots accurately and instantaneously with different sensor network configuration. All these works demonstrate the potential of quantitative, in situ, and real time HVI monitoring using miniaturized piezoelectric sensor network.

关键词： Acoustic Emission(AE) Damage detection Hypervelocity impact Piezoelectric sensor Whipple shielding assembly

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TP transformation based control of rotary pendulum

TP transformation based control of rotary pendulum

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作者： Ileš, Sandor Matuško, Jadranko Kolonić, Fetah Department of Electrical Machines Drives and Automation Faculty of Electrical Engineering and Computing University of Zagreb Croatia

ISBN: (纸本)9789532330670

The Tensor Product (TP) model transformation is a recently proposed technique for transformation of a given Linear Parameter Varying (LPV) state-space model into polytopic model form, namely, to parameter varying convex combination of Linear Time Invariant (LTI) systems. The main advantage of the TP model transformation is that it is executable in a relatively short time and the Linear Matrix Inequality (LMI)-based control design frameworks can immediately be applied to the resulting polytopic models. In this paper, such control approach of nonlin-ear systems is applied to the control of rotary pendulum gantry. Pendulum in hanging position represents simplified model of the real industry crane application. On the other hand, inverted pendulum is a classic problem in dynamics and control theory and widely used as a benchmark for testing control algorithms. In order to reach upright position, self erecting technique is employed. LMI control algorithm obtained for both positions is merged using self erecting control algorithm and tested in real experimental setup. © 2011 MIPRO.

关键词： Position control

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Offset-free distributed predictive control based on fuzzy logic: Application to a real four-tank plant

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IFAC-PapersOnLine 2023年第2期56卷 3247-3252页

作者： M. Francisco E. Masero K. Morales-Rodelo J.M. Maestre P. Vega S. Revollar Department of Computing and Automation University of Salamanca Spain Department of Systems Engineering and Automation University of Seville

This paper proposes an offset-free distributed implementation of a model predictive controller that employs fuzzy negotiation between agents. The scheme is based on model augmentation with additional disturbances to enable zero-offset tracking. Moreover, we code the negotiation criteria as a set of suitable fuzzy rules and consider stability and feasibility guarantees in the controller design for the linearized subsystems. We applied the method to an experimental four-tank plant, showing its effectiveness despite the coupling between subsystems and system-model mismatch.

关键词： Linear multivariable systems Predictive control Fuzzy control systems Process control Control of distributed systems

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Yet Another Robot Application?

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IEEE ROBOTICS & automation MAGAZINE 2016年第2期23卷 12-+页

作者： Salvini, Pericle Korsah, Ayorkor Nourbakhsh, Illah Department of Computer Architecture and Automation Computer Science Faculty Complutense University of Madrid c∖José García Santesmases s∖n Madrid Spain Key Laboratory of Dependable Service Computing in the Cyber Physical Society of the Ministry of Education Chongqing University and the College of Automation Chongqing University Chongqing China School of Automation Chongqing University Chongqing China Department of Electrical Engineering and Computer Science Northwestern University Evanston IL School of Electrical and Electronic Engineering Nanyang Technological University Singapore

The articles in this special section is to find out what lies beyond the fascination toward robots that we have inherited from popular culture, the pleasure of learning with robots derived from the gamification of learning, and the strong appeal for robotics technologies given by its aura of innovation. Are there authentic ways in which robotics can improve education, and what affordances does robotics, in particular, provide for such educational transformation? Indeed, one of the biggest gray areas of educational robotics concerns the lack of empirical evidence on the educational (pedagogical as well as psychological) effectiveness of robots that is related to both the lack of standardized evaluation criteria and the methodological difficulties in conducting sound scientific tests.

关键词： Special issues and sections Robots Computer applications Technology forecasting engineering education STEM Education Programming

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Parallel architecture and optimization for discrete-event simulation of spike neural networks

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Science China(Technological Sciences) 2013年第2期56卷 509-517页

作者： TANG YuHua ZHANG BaiDa WU JunJie HU TianJiang ZHOU Jing LIU FuDong Department of Computer Science and Technology School of ComputerNational University of Defense Technology State Key Laboratory of High Performance Computing National University of Defense Technology College of Mechatronic Engineering and Automation National University of Defense Technology

Spike neural networks are inspired by animal brains,and outperform traditional neural networks on complicated ***,spike neural networks are usually used on a large scale,and they cannot be computed on commercial,off-the-shelf computers.A parallel architecture is proposed and developed for discrete-event simulations of spike neural ***,mechanisms for both parallelism degree estimation and dynamic load balance are emphasized with theoretical and computational *** results show the effectiveness of the proposed parallelized spike neural network system and its corresponding support components.

关键词： spike neural network discrete event simulation intelligent parallelization framework

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Revised Correction Factors in the Specht's Model for Calculation of the Transformer Inrush Current

Revised Correction Factors in the Specht's Model for Calcula...

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2024 International Conference on Electrical Machines, ICEM 2024

作者： Žarko, Damir Hanic, Zlatko University of Zagreb Faculty of Electrical Engineering and Computing Department of Electrical Machines Drives and Automation Unska 3 Zagreb10000 Croatia

ISBN: (纸本)9798350370607

In this study, correction factors are introduced for Specht's analytical model, which is used to estimate the inrush current peaks of transformers and their decay rates. The factors are derived for a set of five transformers using a least squares approach to minimize the discrepancies between the inrush current values from the Specht's model and the transient 2D finite element (FE) simulations. The 2D FE model uses an equivalent permeability of air and copper to mimic the flux linkage vs. current characteristics of the 3D FE model and effectively accounts for the effects of air core inductance at extreme saturation. The study considers the winding connections YNyn and YNd under the assumption that the connection to the grid is made on both the high voltage and the low voltage side. © 2024 IEEE.

关键词： Distribution transformers

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