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2012 20th Mediterranean Conference on Control and Automation, MED 2012

作者： Mustafa, Mohammed Obaid Nikolakopoulos, George Gustafsson, Thomas Department of Computer Science Electrical and Space Engineering Division of Systems and Interaction Luleå University of Technology Luleå Sweden

ISBN: (纸本)9781467325318

In this article a fault detection scheme for stator winding short circuit fault detection in the case of a three phase induction motor is being presented. The three phase motor is being modeled in the equivalent two phase motor (q-d) space, while the modeling of the faulty case is being also formulated. The motor is being identified by the utilization of Set Membership Identification (SMI) that has the merit of identifying both the parameters of the motor as also providing uncertainty safety bounds by calculating orthotopes which bounds the systems parameter vector. Based on the volume and the trend of these orthotopes, rules for identifying the existence of a fault are being presented. If the current values of the identified parameters do not lie inside the safety bounds in the healthy case, but lie in an area that is being defined by the model of the short circuit case, then a fault is being triggered. Detailed analysis of the proposed approach as also extended simulation results are being presented that prove the efficiency of the suggested scheme. © 2012 IEEE.

关键词： Fault detection

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Stator winding short circuit fault detection based on uncertainty ellipsoid intersection for three phase induction motors

Stator winding short circuit fault detection based on uncert...

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10th International Conference on Informatics in Control, Automation and Robotics, ICINCO 2013

作者： Mustafa, Mohammed Obaid Nikolakopoulos, George Control Engineering Group Division of Systems and interaction Department of Computer Science Electrical and Space Engineering SE-97187 Luleå Sweden

ISBN: (纸本)9789898565709

In this article a fault detection scheme for different percentage of stator winding short circuit in one phase of three phase induction motors is presented. In the examined case, the induction motor in the faulty and healthy case has been transformed in the two phase (q - d) model. The model has been identified by the utilization of a Least Squares Set Membership Identification (SMI) algorithm, where additional to the identified parameters, confidence intervals can be also calculated, based on a priori knowledge for the corrupting measurement noise. The identified confidence intervals in an μ-dimensional space can be represented as hyper-ellipsoids having as a center the identified parameters' vector. The novelty of this article stems from the proposal of a fast and geometrical based scheme, which relies on the calculation of the distance among centers of hyper-ellipsoids and the corresponding intersection in each iteration of the identification procedure. Detailed analysis of the proposed fault detection strategy, as also extended simulation results are being presented that prove the efficiency of the suggested scheme.

关键词： Fault detection

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The future of advanced driving assistance system development in China

The future of advanced driving assistance system development...

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IEEE International Conference on Vehicular Electronics and Safety

作者： Duan, Lian Chen, Fang Department of Computer Science and Engineering Chalmers University of Technology Gothenburg Sweden Interaction Design Department of Apply IT Chalmers University of Technology Gothenburg Sweden

ISBN: (纸本)9781457705762

Nowadays, with the rapid development of vehicle industry in China, an increasing number of companies realized the importance of culture adaption, when implementing ADAS (Advanced Driving Assistance System) to the vehicles in China. However, some designing issues of these systems need to be solved, taking consideration of driver's behavior and traffic situation in China. There is a lack of studies on Chinese drivers and related to HMI design of ADAS systems in the literature. There are limited reports on Chinese traffic and drivers studies, but still lack of the necessary depth. Some interaction design methodologies, including personas, focus group study, questionnaire and so on, were used in these reports. However, these studies are neither intensive nor comprehensive. Although (part of) the issues are brought up and analyzed, only general solutions are mentioned for the designing of the systems. Present paper, through literature review, indicated different areas that need to be focused on that are related to culture issues and the possible methodologies that can be applied. © 2011 IEEE.

关键词： design

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Treating and teaching aesthetics as personality 08

Treating and teaching aesthetics as personality

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NordiCHI 2008: Building Bridges - 5th Nordic Conference on Human-computer interaction

作者： Lundgren, Sus IDC : Interaction Design Collegium Department of Computer Science and Engineering Chalmers University of Technology SE-412 96 Göteborg Sweden

ISBN: (纸本)9781595937049

The environment changes direction fast Thinking like a pen flies Through the wall the headache is thrown My fear is created by you others I should have tasted freedom I call out This is not the anguished work of some angst-ridden young poet;instead it is the result of a conversation between a group of digital personalities, manifested as dolls trapped in an elevator, but also in graphics, in words and wording, in gestures and in relations and reactions. The system is called Physical Poets, and the creation of it was a workshop aiming at teaching interaction design students how to reason about, and make, aesthetic decisions. In this project, we taught one possible view on aesthetics, namely the view that when designing complex systems, it can sometimes help to assign a "personality" to the system in order to make all aspects of it merge together to an unified set of expressions and behaviors. By designing actual personalities - the poets - this concept was highlighted to the students, as were the issues with expressing these personalities and making sound aesthetical decisions fitting both their personalities and the system as a whole. Copyright 2008 ACM.

关键词： Teaching

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A NOVEL MODEL FOR THE MATERIAL SELECTION OF SMART OBJECTS FOR HAND-REHABILITATION: A CASE STUDY 24

A NOVEL MODEL FOR THE MATERIAL SELECTION OF SMART OBJECTS FO...

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24th International Conference on engineering design, ICED 2023

作者： Bos, Mikaël Ivar Karahanoǧlu, Armaǧan Haarman, Juliet Nizamis, Kostas Chair of Systems Engineering and Multidisciplinary Design Department of Design Production and Management Faculty of Engineering Technology University of Twente Enschede Netherlands Interaction Design Research Group Department of Design Production and Management Faculty of Engineering Technology University of Twente Enschede Netherlands Human Media Interaction Group Faculty of Electrical Engineering Mathematics and Computer Science University of Twente Enschede Netherlands

Home hand rehabilitation for stroke is becoming increasingly important due to logistic and financial challenges. Developing Daily-life Integrated Hand-rehabilitation Products (DIHP) aims to enable the application of at-home rehabilitation. The materials of these products are essential for their success, however, selecting materials for DIHP has not been investigated yet. Previous research on material selection showed that it is done strictly on material properties or based on a human-centered approach. Hence, in this study, we propose a hybrid model for choosing materials for DIHP. To achieve this, we first combined the findings of previous material selection processes into a comprehensive material selection model. We applied this model in a case study, in which we first selected three materials based on their properties. Following, we 3d printed a DIHP out of the chosen materials and tested the feeling of the materials with multiple expert groups. Our findings suggest that the proposed material selection method is promising and highlights that our comprehensive model provides more insights when compared to a strict material property-based selection. © The Author(s), 2023. Published by Cambridge University Press.

关键词： 3D printing

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An evolutionary optimized automated machine learning approach to soil unconfined compressive strength prediction for sustainable transportation infrastructure

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Transportation Geotechnics 2025年 52卷

作者： Goliatt, Leonardo Marhoon, Haydar Abdulameer Yaseen, Zaher Mundher Heddam, Salim Zand, Ahmed W. Al Halder, Bijay Tan, Mou Leong Ahmadianfar, Iman Elsayed, Salah Department of Applied and Computational Mechanics Federal University of Juiz de Fora Brazil Information and Communication Technology Research Group Scientific Research Center Al-Ayen University Thi-Qar Iraq College of Computer Sciences and Information Technology University of Kerbala Karbala Iraq Civil and Environmental Engineering Department King Fahd University of Petroleum & Minerals Dhahran 31261 Saudi Arabia Faculty of Science Agronomy Department Hydraulics Division Laboratory of Research in Biodiversity Interaction Ecosystem and Biotechnology University 20 Août 1955 Route El Hadaik Skikda 26 BP Algeria Civil Engineering department Faculty of Engineering Al-Turath University Baghdad Iraq Department of Earth Sciences and Environment Faculty of Science and Technology Universiti Kebangsaan Malaysia Bangi 43600 Malaysia GeoInformatic Unit Geography Section School of Humanities Universiti Sains Malaysia Penang 11800 Malaysia Centre for Environmental Sustainability and Water Security (IPASA) School of Civil Engineering Faculty of Engineering Universiti Teknologi Malaysia UTM Sekudai Johor 81310 Malaysia Department of Civil Engineering Behbahan Khatam Alanbia University of Technology Behbahan Iran Agricultural Engineering Evaluation of Natural Resources Department Environmental Studies and Research Institute University of Sadat City Minufiya 32897 Egypt

Soil chemical stabilization recommendations use treated soils’ unconfined compressive strength (UCS) as the main acceptance criterion in laboratory tests. However, optimizing UCS supplemental content requires a human- and financial-intensive trial-and-error process. Data intelligence models enhance automatized scientific sampling procedures, limit laboratory testing, and provide useful information regarding stabilization adequacy without producing preliminary samples. This research proposes an evolutionary algorithm-assisted automated gradient boosting model to predict the UCS values from datasets from diverse sources. A grey wolf optimization algorithm is integrated into the gradient boosting training procedure, determining its best internal parameters and helping to select the most relevant input variables. Comparative evaluations on six recently published datasets demonstrate the efficiency of the proposed model compared to existing approaches. The optimized models produced better results than the benchmark models reported in the literature, with average coefficients of determination ranging from 0.723 to 0.928. The hybrid models with evolutionary feature selection achieved comparable performance while reducing the number of input variables between 16% and 54%. © 2025 Elsevier Ltd

关键词： Automated machine learning Gradient boosting Grey wolf optimization Hybrid model Unconfined compression strength

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Impedance control for force - Reflecting teleoperation with communication delays based on IOS small gain theorem

Impedance control for force - Reflecting teleoperation with ...

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

作者： Do, Nam Duc Namerikawa, Toru Division of Electrical Engineering and Computer Science Kanazawa University Japan Department of System Design Engineering Keio University Japan

ISBN: (纸本)9784907764333

This paper focuses on a new proposal system input of impedance control that relates to force reflection (FR) scheme of teleoperation with time varying in communication lines. To improve the tracking performance and transparency, the control algorithm uses one more communication channel to transfer the FR information from the master side to the slave side. Using variable damping values, the contact stability is achieved at the time while the slave robot contacts with the environment. In this work, the input-to-output stability (IOS) small gain approach is used to show the overall force-reflecting teleoperation to be input-to-state stable (ISS). Several experimental results show the effectiveness of our proposed algorithm. © 2009 SICE.

关键词： Slave robots

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Broken bar fault detection based on set membership identification for three phase induction motors

Broken bar fault detection based on set membership identific...

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9th International Conference on Informatics in Control, Automation and Robotics, ICINCO 2012

作者： Mustafa, Mohammed Obaid Nikolakopoulos, George Gustafsson, Thomas Saied, Basil M. Department of Computer Science Electrical and Space Engineering Division of Systems and Interaction Lulea University of Technology Lulea Sweden Department of Electrical Engineering University of Mosul Mosul Iraq

ISBN: (纸本)9789898565211

This article presents a fault detection scheme for the case of a broken bar occurrence in a three phase induction motor. The proposed scheme relies on Set Membership Identification (SMI) and novel proposed boundary violation rules for the identified motor's parameters. The model of the three phase induction motor is being transformed into an equivalent two phase model, described in the q-d space, for both the normal and the faulty case. By the utilization of the SMI technique, the simplified equivalent model of the induction motor is being identified during the steady state operation (non-fault case), while at the same time safety bounds for the identified variables are being provided, based on an a priori defined corrupting additive noise. On the event of a fault, specific fault detection conditions are being proposed that can capture the specific type of a broken bar fault. The proposed conditions depend on: a) abnormal parameter jumps, and b) rapid changes in the volume of the bounding uncertainty, which is being formulated either by ellipsoids or orthotopes. Detailed analysis of the proposed approach as also extended simulation results are being presented that prove the efficiency of the proposed scheme. Copyright © 2012 SciTePress.

关键词： Fault detection

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A comparative study on the identification of building natural frequencies based on parametric models

A comparative study on the identification of building natura...

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IASTED International Conference on Modelling, Identification and Control, MIC 2014

作者： Saaed, Tarek Edrees Nikolakopoulos, George Jonasson, Jan-Erik Department of Civil Environmental and Natural resources engineering Division of Structural and Construction Engineering Lulea University of Technology Sweden Department of Computer Science Electrical and Space Engineering Division of Systems and Interaction Lulea University of Technology Sweden

The analysis and design of civil engineering structures is a complex problem, which is based on many assumptions to simplify these operations. This in turn, leads to a difference in the structural behavior between calculations based models and real structures. Structural identification was proposed by many researchers as a tool to reduce this difference between models and actual structures. Moreover, Parametric models and non-parametric models were used intensively for system identification by many researchers. In this research effort, the system identification concept is utilized to identify the natural frequencies for a steel building's frames. Different black box linear parametric models such as Transfer Function model (TF), Auto-Regressive model with eXternal input model (ARX), Auto-Regressive Moving Average with eXternal input (ARMAX) model, Output Error model structure (OE), and Box-Jenkins model (BJ) were examined for identifying the first 10th natural frequencies for the building's frames, based on simulation results. Abaqus 6.12 finite-element software was utilized to perform the time history analysis for the examples and the obtained responses at one point of the roofs (assumed as a sensor) were further processed by the parametric models to obtain the building's natural frequencies based on the Abaqus time history analysis results (assumed as a measurements). After that, Abaqus 6.12 was utlized again to perform another analysis, which is called frequency analysis to obtain the building's natural frequencies and mode shapes based on the stiffness and mass (not the measurements) of the buildings. The results showed that the linear parametric models TF, ARX, ARMAX, OE, and BJ are robust to identify the natural frequencies of building and they are recommend for future work.

关键词： Natural frequencies

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Model-based estimation of thin multi-layered media using ultrasonic measurements

Model-based estimation of thin multi-layered media using ult...

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作者： Hägglund, Fredrik Martinsson, Jesper Carlson, Johan E. Department of Computer Science and Electrical Engineering Lulea University of Technology Lulea Sweden LKAB R and D Malmberget Sweden Division of Systems and Interaction Department of Computer Science and Electrical Engineering Lulea University of Technology Lulea Sweden

In ultrasonic measurement situations, when dealing with media of multi-layered structures consisting of 1 or more thin layers, analysis of the measured ultrasonic waveform can be difficult because of overlapping and reverberant echoes. Information from the individual layers is then difficult to extract because the individual echoes cannot be detected. In this study, we use a parametric layer model to analyze the multi-layered material in a system identification approach. The parameters of the model are connected to physical properties of the investigated material, e.g., the reflection coefficients, the time-of-flight, and the attenuation. The main advantage using this model is that the complexity of the model is connected to the number of layers rather than the number of observable echoes in the received ultrasonic waveform. A system of linear equations is presented, giving the opportunity to find the model for both pulse-echo and through-transmission measurements. A thorough effort is made on the parameter estimation and optimization algorithm. The model is validated with practical measurements on a 3-l a yered structure using both pulse-echo and through-transmission techniques. The 3-layered material consists of a thin embedded middle layer with the time-of-flight in that layer shorter than the emitted signal's time support, giving rise to overlapping ech oes. Finally the relation between the model parameters and physical properties of the material is established. © 2009 IEEE.

关键词： Parameter estimation

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