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Bat-inspired optimization approach applied to Jiles-Atherton hysteresis parameters tuning 14

Bat-inspired optimization approach applied to Jiles-Atherton...

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16th Genetic and Evolutionary Computation Conference Companion, GECCO 2014 Companion

作者： Dos Santos Coelho, Leandro Da Silva, Andre Mendes Mariani, Viviana Cocco Batistela, Nelson Jhoe Ayala, Helon Vicente Hultmann Leite, Jean Vianei Industrial and Systems Eng. Grad. Program Pontifical Catholic University of Parana and Electrical Engineering Federal University of Parana Curitiba PR Brazil Mechatronics Eng. Undergraduate Program Pontifical Catholic University of Parana Curitiba PR Brazil Mechanical Eng. Grad. Program Pontifical Catholic University of Parana and Electrical Engineering Federal University of Parana Curitiba PR Brazil Florianopolis SC Brazil Curitiba PR Brazil

ISBN: (纸本)9781450328814

Recently, it was proposed a new metaheuristic optimization approach namely bat algorithm (BA), which is based on the fascinating capability of microbats in to find their prey and discriminate different types of insects even in complete darkness. In this paper, we introduce a novel enhanced hybrid approach combining BA with a mutation style operator from differential evolution and beta probability distribution (BADEBD) and report its performance on to identification of the 10 hysteresis parameters for the 2-dimensional Jiles-Atherton hysteresis modeling to a material under rotational excitation. Compared with the classical BA, the proposed BADEBD performs better in terms of the solution accuracy and the convergence rate.

关键词： Hysteresis

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Selection of optimum communication technology for a distributed workgroup

Selection of optimum communication technology for a distribu...

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27th Annual National Conference of the American Society for engineering Management 2006 - Managing Change: Managing People and Technology in a Rapidly Changing World, ASEM 2006

作者： Saraf, A. Baliga, B. Yu, W. Buske, W. Yao, A. MTS Systems Corporation Eden Prairie MN United States Engineering Management Program St. Cloud State University United States Department of Mechanical and Manufacturing Engineering United States Department of Mathematics St. Cloud State University United States Electrical and Computer Engineering St. Cloud State University United States

ISBN: (纸本)9781604237146

Selecting optimum communication technology for a distributed workgroup such as an electric supply cooperative with a number of sub-stations is a challenge. A quantitative approach to evaluate the various communication technologies based on multicriteria is needed to select optimum communication technology. An electric cooperative in Minnesota was used for a case study and the various communication technologies used (frame relay, fiber optic etc) were investigated. Analytical Hierarchy Process for multicriterion was used to select optimum communication technologies between the sub-stations. The analysis showed that for sub-stations within 10 miles of the hub fiber optic was the most preferred form of communication technology. For distances over 10 miles satellite system was the preferred communication technology. Selection of appropriate communication technology improves the efficiency of the distributed workgroup. Substantial savings in communication costs can be achieved by optimizing the communication technology system.

关键词： Fiber optics

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Sliding mode control for a class of underactuated systems using feedforward normal form: A slosh-container system

Sliding mode control for a class of underactuated systems us...

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International Workshop on Variable Structure systems, VSS

作者： Parth S Thakar B. Bandyopadhyay P. S. Gandhi Interdisciplinary Program in Systems and Control Engineering IIT Bombay Mumbai Maharashtra India Department of Mechanical Engineering IIT Bombay Mumbai Maharashtra India

This paper deals with the design of stable sliding mode control (SMC) for the underactuated slosh-container system using feedforward normal form. A nonlinear coordinate transformation is used to convert the system into so called feedforward normal like form to decouple the control input appearing in one of the degree of freedom (DOF). This results in the design simplicity for the sliding mode control as well as the equivalent control and reduced order system derivation and its stability analysis. The range of surface parameters to provide the stable sliding motion for the system using proposed scheme, is also large compared to our earlier results. Simulation results are also presented to illustrate the proposed method.

关键词： Mathematical model Containers Equations Feedforward neural networks Vehicle dynamics Liquids Sliding mode control

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Automated indirect transport of biological cells with optical tweezers using planar gripper formations

Automated indirect transport of biological cells with optica...

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2012 IEEE International Conference on Automation Science and engineering: Green Automation Toward a Sustainable Society, CASE 2012

作者： Chowdhury, Sagar Thakur, Atul Wang, Chenlu Svec, Petr Losert, Wolfgang Gupta, Satyandra K. Department of Mechanical Engineering Institute for Systems Research University of Maryland College Park MD 20742 United States Department of Mechanical Engineering University of Maryland College Park MD 20742 United States Biophysics Program University of Maryland College Park MD 20742 United States Department of Physics Institute for Physical Science and Technology University of Maryland College Park MD 20742 United States

ISBN: (纸本)9781467304283

Optical tweezers are used for manipulation of micron-sized dielectric beads and cells. Some biological cells are vulnerable to photo damage if subjected to laser-based direct manipulation. In such cases, precise manipulation of these cells can be accomplished by using gripper formations made up of silica beads, which are actuated by optical tweezers. Manual indirect manipulation of cells using grippers made of optically trapped beads is a time consuming process or sometimes just impossible. This paper presents an approach for automated micromanipulation using gripper formations and heuristic based path planning for collision-free transport of biological cells. The objective of the developed planner is to transport target cells to their respective goal positions in the minimum time. we evaluated the performance of different gripper formations in terms of gripper stability, speed of transport, and required laser power using experiments. © 2012 IEEE.

关键词： Grippers

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Effect of axial heat conduction and internal heat generation on the effectiveness of counter flow microchannel heat exchangers

Effect of axial heat conduction and internal heat generation...

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作者： Mathew, B. Hegab, H. College of Engineering and Science Louisiana Tech University Ruston LA 71272 United States Micro and Nano Systems Track College of Engineering and Science LA Tech. Ruston LA 71272 United States Mechanical Engineering Program College of Engineering and Science LA Tech. Ruston LA 71272 United States

ISBN: (纸本)9781600867453

The influence of axial heat conduction and internal heat generation (viscous dissipation) on the effectiveness of a counter flow microchannel heat exchanger is analyzed in this paper. The ends of the wall separating the hot and cold fluid are kept isothermal, i.e. non-adiabatic, thereby leading to thermal interaction between the heat exchanger and its surroundings. A thermal model of this particular heat exchanger consists of three one dimensional governing equations. This system of equations is solved using finite difference method. The hot and cold fluid effectiveness is found to depend on parameters such as NTU, axial heat conduction parameter, end wall temperatures and internal heat generation parameter. Increase in axial heat conduction parameter of a heat exchanger subjected internal heat generation can either increase or decrease the effectiveness of the fluids depending on the temperature of the end walls. The effect of internal heat generation in a counter flow microchannel heat exchanger with axial heat conduction is to always degrade and improve the effectiveness of the hot and cold fluid, respectively. © 2010 by the American Institute of Aeronautics and Astronautics, Inc.

关键词： Heat exchangers

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Experimental Investigation of Relationship between Inner Ground Resistance Force and Vibration Kinds for Underground Moving Robots

Experimental Investigation of Relationship between Inner Gro...

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Mechatronics and Robotics engineering (ICMRE), International Conference on

作者： Tomohiro Watanabe Kojiro Iizuka Mechanical Engineering Program Faculty of Engineering Niigata University Niigata City Japan Department of Systems and Engineering and Science Shibaura Institute of Technology Saitama City Japan

ISBN: (数字)9798350394276

ISBN: (纸本)9798350394283

In recent years, there have been many missions where the rovers land and explore the surface of planets or other extraterrestrial bodies. The purpose of these missions is to return the samples of extraterrestrial ground. These samples can solve the planets’ origins and their sources of life. They have not only scientific value but also engineering value. Information on ground characteristics is helpful when building the base. The underground samples are especially valuable because they are not affected by space weathering and keep good conditions. In this background, the rovers, which move underground, have received attention as the method to obtain underground samples. In our previous study, the moving mechanism, which moves underground using vibrations, was proposed. The internal ground resistance decreases when imparting vibrations because the ground particles move and behave like a fluid. On the other hand, the inner ground resistance increases after imparting vibrations because the ground was compacted. The proposed mechanism moves underground while changing the ground condition. This study investigated the relationship between internal ground resistance force and vibration kinds because this relationship helps move underground. In the experiment, inner ground resistance force was measured when an object vibrating was dragged on the ground. In the results, the inner ground resistance force is increased by the vibration whose vibratory force is low. On the other hand, it is decreased by the vibration whose vibratory force is high. This knowledge is valuable for designing the rover’s underground movement using vibrations.

关键词： Vibrations Resistance Knowledge engineering Mechatronics Planets Force Land surface

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Dynamics of fluid flow in a heated zig-zag square microchannel

Dynamics of fluid flow in a heated zig-zag square microchann...

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作者： Mathew, B. John, T.J. Hegab, H. College of Engineering and Science Louisiana Tech University Ruston LA 71272 United States Micro and Nano Systems Track College of Engineering and Science LA Tech. Ruston LA 71272 United States Mechanical Engineering Program College of Engineering and Science LA Tech. Ruston LA 71272 United States

ISBN: (纸本)9781600867453

This paper deals with the dynamics of flow in a zig-zag square microchannel subjected to uniform external heat flux (H2 thermal boundary condition). The heat transfer and fluid flow characteristics is studied using CoventorWare™. Numerical studies are performed using microchannels with hydraulic diameter ranging from 100 μm to 300 μm for Reynolds number between 25 and 500. The angle which each arm of the zig-azg microchannel makes with the axial direction is varied from between 10° and 30° with increments of 10°. The effect of number of turns in a repeating unit for a specific length of the microchannel is also investigated in this paper. The Nusselt number and Poiseuille number in a zig-zag microchannel is found to be totally different from that in a straight square microchannel of the same geometric dimensions. These two parameters are found to increase with increase in Re for zig-zag microchannels with fixed geometry. The individual effect of each of these parameters is to increase both Nusselt number and Poiseuille number for a specific Reynolds number. The enhancement is highest with increase in number of turns while it is the lowest with increase in hydraulic diameter. The enhancement in Nusselt number and Poiseuille number is explained using the flow profile in the microchannels. © 2010 by the American Institute of Aeronautics and Astronautics, Inc.

关键词： Microchannels

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Micro channel heat sink with embedded pin-fin structures

Micro channel heat sink with embedded pin-fin structures

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作者： John, T.J. Mathew, B. Hegab, H. College of Engineering and Science Louisiana Tech University Ruston LA 71272 United States Micro and Nano Systems Track College of Engineering and Science LA Tech. Ruston LA 71272 United States Mechanical Engineering Program College of Engineering and Science LA Tech. Ruston LA 71272 United States

ISBN: (纸本)9781600867453

The dissipation of heat with the help of micro channel heat sink and micro pin-fin fin heat sink has been a topic of interest for many researchers over a decade. The comparison between these two heat sink and the advantage and disadvantages of one over the other has been studied by researchers. In this paper, the authors are trying to study the effect of introducing pin-fin structures inside the micro channel heat sink. A FOM term is introduced in the paper to evaluate the overall performance of the ordinary micro channel heat sink and the micro channel heat sink with pin-fin structures embedded in it. The effect of introducing different shapes of pin-fin structures inside the micro channel is also studied in the paper. The study results showed that there is a huge increase in the overall performance of the micro channel heat sink by introducing pin-fin structures inside the channel, but the study also showed that the effect of introducing different shapes of pin-fin structures inside the channel is negligible. © 2010 by the American Institute of Aeronautics and Astronautics, Inc.

关键词： Fins (heat exchange)

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Parallel flow microchannel heat exchangers subjected to axial heat conduction and internal heat generation

Parallel flow microchannel heat exchangers subjected to axia...

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ISBN: (纸本)9781600867453

This paper studies the effect of axial heat conduction and internal heat generation (viscous dissipation) on the effectiveness of a parallel flow microchannel heat exchanger. The ends of the wall separating the fluids are maintained at constant temperatures. This leads to heat transfer between the heat exchanger and its surroundings. The thermal model developed in this paper consists of three governing equations;one for each of the fluids and one for the wall. This system of coupled equations is solved simultaneously using finite difference method. The effectiveness of the fluids is found to depend on NTU, axial heat conduction parameter, end wall temperatures and internal heat generation parameter. In the presence of just internal heat generation the effectiveness of the hot and cold fluid degrades and improves, respectively. For situations when the temperature of the end wall at the inlet side is greater than that at the outlet side, increase in axial heat conduction parameter of a heat exchanger subjected internal heat generation increases and decreases the effectiveness of the hot and cold fluid, respectively. The effect of internal heat generation in a parallel flow microchannel heat exchanger with axial heat conduction is to always degrade and improve the effectiveness of the hot and cold fluid, respectively. © 2010 by the American Institute of Aeronautics and Astronautics, Inc.

关键词： Heat exchangers

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Automated 3D bone modelling based on geometric features from images 24

Automated 3D bone modelling based on geometric features from...

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24th International Conference on Production Research, ICPR 2017

作者： Rudek, M. Gumiel, Y.B. Canciglieri, O. Carvalho, D.R. Trajanovic, M. Industrial and Systems Engineering Post-Graduate Program PUCPR Imaculada Conceicao Street 1155 zip code CuritibaParana80215-901 Brazil Graduate Program on Health Technology in Pontifical Catholic University of Parana PUCPR Imaculada Conceicao Street 1155 zip code CuritibaParana80215-901 Brazil Faculty of Mechanical Engineering University of Nis Aleksandra Medvedeva 14 Niš18000 Serbia

ISBN: (纸本)9781605955070

Currently the computational modelling tools, expert algorithms for image segmentation and three-dimensional printing devices have improved the process of manufacture of customized pieces in the context of automation of prosthesis modelling. Among several strategies to obtain the correct shape of a missing bone part, we explore a modelling method based on geometric features defined by Bezier cubic curves. The data is obtained from sets of slices of tomographic scans as a reference. From the images, we know about data from the edges in the image but we do not have any information about a missing area in a specific bone region. Thus, the objective is to search patterns for features whose values are known from similar tomographic image which matches to fill a hole in a bone. Due the free form of a bone there are a lot of parameters to be evaluated. Thus, a Data Mining approach is applied for classification and to discover the best features as shape descriptors. In this way, the prosthesis manufacture can be automated in all stages among image scanning and printing. © 2017 DEStech Publications. All rights reserved.

关键词： Image enhancement

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