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2006 AIChE Spring National Meeting - 5th World Congress on Particle Technology

作者： Tashiro, Hiroyuki Ogata, Koichiro Wakamizu, Yoh Funatsu, Katsuya Tomita, Yuji Department of Mechanical Systems Engineering Kurume Institute of Technology Department of Electronic and Mechanical Engineering Oshima National College of Maritime Technology Design2 3rd Designing Department Development Management Department Nikon Corporation Department of Mechanical and Control Engineering Kyushu Institute of Technology

We examined the onset condition of flushing by falling the fluidized soft wheat flour into the vessel that has the orifice at the bottom, where the mean size of flour is 69.8 μm, material density is 1417 kg/m3, and moisture content is between 11.9 and 13.4 %. The flour of about 25 kg is fluidized in the upper hopper in each experiment, of which voidage is changed by different air flow rates from 0.1710-3 to 0.5010 -3 m3/s. The exit diameter of the upper hopper is changed from 10 to 50 mm, and the diameter of flushing orifice is change from 1 to 10 mm. We obtained the following results: (1) The flushing occurs when the interstitial air pressure at the bottom of the vessel is larger than 300 Pa and the initial voidage is more than 0.54, where the mass flow rate of powder into the vessel exceeds 500 g/s. (2) The interstitial air pressure at the beginning and end of flushing increases with decreasing the orifice diameter, and that at the beginning of flushing is larger than that at the end of flushing.

关键词： Orifices

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Precision design verification system of injection molds using web-based 3D viewing technology

Precision design verification system of injection molds usin...

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21st Annual Meeting of the American Society for Precision engineering, ASPE 2006

作者： Song, In-Ho Chung, Siyon Chung, Sung-Chong Department of Mechanical Design and Production Engineering Hybrid Systems Design and Control Laboratory Hanyang University SungdongGu Seoul 133-791 Korea Republic of Faculty of Science University of Western Ontario London ON Canada

ISBN: (纸本)1887706410

An efficient and precision hybrid interference verification algorithm for the web-based interference verification system is studied for injection mold design processes. In order to design a collaborative system over the distributed environment, the proposed system uses lightweight CAD files produced from the optimally transformed CAD data through ACIS kernel and InterOp. This proposed system allows collaborative developers to verify interferences among parts over the Internet without any commercial CAD systems. The system gives benefits to collaborators by reducing production cost, errors and lead-time to the market. Validity of the developed system is confirmed through case studies.

关键词： Websites

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An XML-based digital mock-up system for heterogeneous assembly

An XML-based digital mock-up system for heterogeneous assemb...

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21st Annual Meeting of the American Society for Precision engineering, ASPE 2006

作者： Song, In-Ho Kim, Kyung-Don Chung, Sung-Chong Department of Mechanical Design and Production Engineering Hybrid Systems Design and Control Laboratory Hanyang University SungdongGu Seoul 133-791 Korea Republic of Small Business Corporation Gyeonggi Regional Headquarter Suwon 443-766 Korea Republic of

ISBN: (纸本)1887706410

Digital Mock-Up(DMU) system, a tool to build a virtual mock-up in the design stage, has been used to prevent interferences and mismatches during precision design processes. Using the virtual assembly tool, engineers are able to design precision and interference free parts without making physical mock-ups. Instead of a single CAD source, several CAD systems are used to design a complex product in the distributed design environment. In this paper, a heterogeneous multi-CAD assembly method is proposed through an XML and the lightweight CAD file. XML data contains hierarchy of the heterogeneous multi-CAD assembly. The lightweight CAD file produced from various CAD files through ACIS kernel and InterOp includes not only mesh and B-Rep data, but also topological data. It is used to visualize CAD data and to verify dimensions. The developed system is executed on desktop computers. It does not require commercial CAD systems to visualize 3D assembly data. Assembly of heterogeneous models is conducted to verify the effectiveness of the developed DMU system on the Internet.

关键词： XML

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ITERATIVE design OF control systems: AN APPROACH TO OVERCOME THE RESONANT EFFECT ON HEAT EXCHANGERS

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IFAC Proceedings Volumes 2006年第19期39卷 123-128页

作者： Julio-Ariel Romero Antonio Campo Pedro Albertos Joaquín Navarro-Esbrí Department of Industrial Systems Engineering and Design Universitat Jaume I Spain Department of Mechanical Engineering The University of Vermont USA Department of Systems Engineering and Control Polytechnic University of Valencia Spain Department of Mechanical Engineering and Construction Universitat Jaume I Spain

This paper deals with the control of the heat exchangers. Due to the resonant effect on this systems, simplified lumped parameters models obtained from the step response can be not enough appropriate to controller design if high performance is required. To design the control, instead of looking for a precise heat exchanger model obtained through complex experiments and sophisticated parameter estimation methods, the use of an iterative approach is suggested.

关键词： heat exchanger resonance iterative design predictive control

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Fault diagnostics of industrial robots using support vector machines and discrete wavelet transforms

Fault diagnostics of industrial robots using support vector ...

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2006 ASME International mechanical engineering Congress and Exposition, IMECE2006

作者： Datta, A. Patel, S. Mavroidis, C. Antoniadis, I. Krishnasamy, J. Hosek, M. Dept. of Mechanical and Industrial Engineering 375 Snell Engineering Center Northeastern University 360 Huntington Avenue Boston MA 02115 United States Mechanical Design and Control Systems Division Department of Mechanical Engineering National Technical University of Athens 9 Heroon Polytechniou Str. 15773 Athens Greece Brooks Automation Inc. 16 Elizabeth Drive Chelmsford MA 01854 United States

ISBN: (纸本)0791837904

In this paper we address the problem of fault diagnostics in industrial robots. The goal was to develop a method that automatically, accurately and in a generic way could identify and classify faults once they occur for any type of industrial robot used. Although a large number of diagnosis methods and relevant applications for industrial equipment already exist, the current research in the area of fault diagnosis of industrial robotic manipulators is rather poor, due to the large variability of faults, the unsteady and non-uniform operating conditions, the small amount of sensors used in industrial manipulators and the rather limited time records of the equipment. These restrictions present key challenges of the current research to be undertaken. In this paper we present a novel approach to perform fault diagnostics of industrial robotic systems using Support Vector Machines (SVM) and Discrete Wavelet Transform based feature extraction. Experimental results are obtained from an industrial manipulator used in the semi-conductor industry. Copyright © 2006 by ASME.

关键词： Industrial robots

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Condition monitoring of micro-drilling processes on glass by using machine vision

Condition monitoring of micro-drilling processes on glass by...

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21st Annual Meeting of the American Society for Precision engineering, ASPE 2006

作者： Kim, Hyun-Ho Chung, Siyon Kim, Seung-Chul Jee, Won-Ho Chung, Sung-Chong Department of Mechanical Design and Production Engineering Hybrid Systems Design and Control Laboratory Hanyang University SungdongGu Seoul 133-791 Korea Republic of Faculty of Science University of Western Ontario London Canada Shinhan Diamond Inc. Incheon 405-100 Korea Republic of

ISBN: (纸本)1887706410

Optical and medical devices require micro-drilling of holes on glass. Brittle fracture occurs during the drilling. Cone and radial cracks are generated due to impact load and walking when a drill hit a glass to make a hole. To produce good holes without cracks and fracture, a condition monitoring of glass drilling processes is required. In this paper, to develop a cost-effective direct monitoring system in micro-drilling processes on glass, a machine vision unit with the edge detection and 3D measurement functions is studied. It consists of a CCD camera with a zoom lens attached to the precision servo stage and a novel illumination unit. Performance of the developed machine vision system is verified in micro-drilling processes on glass using diamond and carbide drills.

关键词： Glass

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H-25 gas turbines for PetroChina's gas processing plant in Indonesia

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Hitachi Review 2006年第3期55卷 124-128页

作者： Tsuruta, Hiroo Hirose, Shunichi Shinohara, Nobuyuki Mechanical Technology of Engineering Unit Turbomachinery Society of Japan Overseas Thermal Power Plant Project Management Department Thermal Power Systems Division Power Systems Turbine Plant Design Department Thermal Power Systems Division Gas Turbine Design Section GTSJ

OVERVIEW: The importance of energy including natural gas is universal, and worldwide demand will only continue to escalate in the years ahead. Areas experiencing growing demand for energy have inevitably expanded as industry has evolved in various regions around the globe, and new oil and natural gas fields continue to be developed. Recently, a natural gas field was discovered in the Betara District in the Jambi Province, eastern central Sumatra in Indonesia, and the Betara Complex Development Project, managed chiefly by PetroChina International Jabung Limited, was built to exploit this resource. A key facility of the project is the Betara Gas Processing Plant for which CHIYODA CORPORATION and Chiyoda International Indonesia were brought in to provide engineering, procurement, and construction (EPC), and Hitachi was commissioned to supply H-25 gas turbines as the power supply for the plant. Because the project site is so remote from Indonesia's power grid, the power system for the plant is implemented as an isolated system that is not connected to any other power system.

关键词： Electric power plants

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GPC control of the airpath of high speed diesel engines

GPC control of the airpath of high speed diesel engines

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IEEE International Conference on Computer-Aided design

作者： J.V. Garcia-Ortiz P. Langthaler L. Del Re Department of Mechanical Engineering and Construction University of Jaume Castellon de la Plana Spain Institute of Design and Control of Mechatronical Systems Johannes Kepler University of Linz Linz Austria

This paper presents a predictive design approach for the airpath control of diesel engines (EGR/ VGT). The approach arises naturally from a model based sight of engine control and is discussed both in the “double SISO” version as well as in a modified MIMO version designed to cope with artificial setpoints typically used to enforce exact closing of valves in engines subject to production variance. The approach has been tested on an AVL dynamic test bench with a production BMW four cylinder diesel engine and compared to the results obtained by the original control configuration. The results confirm that the model based predictive approach has a large potentiality to improve the system behavior in terms of pollutants during transients, and that in some cases even significant improvements of specific consumption are achieved.

关键词： Diesel engines Pressure control Fuels Automatic control Predictive control Pi control Valves Cost function Hardware Production

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Announcements, comments, and acknowledgments

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AIAA Journal 2006年第1期44卷 1-10页

作者： Oran, Elaine Kailasanath, Kazhikathra Aggarwal, Suresh K. Ahmadian, Mehdi Alexandrov, Natalia Auweter-Kurtz, Monika Bailly, Christophe Balachandran, Balakumar Berman, Alex Candler, Graham V. Chelliah, Harsha K. Chokani, Ndaona Fujii, Kozo Gaitonde, Datta V. Ghia, Kirti Karman N. Givi, Peyman Gore, Jay P. Kaplan, Carolyn R. Livne, Eli Lucht, Robert P. Messac, Achille Wing, N.G. Palazotto, Anthony N. Pierre, Christophe Plotkin, Allen Roy, Ajit K. Saigal, Sunil Sforza, Pasquale M. Shivakumar, Kunigal N. So, Ronald M.C. Springer, Anthony M. Anatolitumin, Anthony M. Zhong, Xiaolin United States Division of Computational Physics United States United States AIAA United States APS United States National Academy of Engineering United States Center for Reactive Flow and Dynamical Systems Naval Research Laboratory United States Institute of Physics Department of Mechanical Engineering University of Illinois at Chicago United States ASME Combustion Institute Department of Mechanical Engineering Virginia Polytechnic Institute State University United States Aeronautics Systems Analysis Branch NASA Langley Research Center United States SIAM ISSMO Aerospace Engineering Institute of Space Systems Universität Stuttgart Germany Amelia Earhart Italy International Amelia Earhart Award Committee Italy France France Mechanical Engineering University of Maryland College Park United States AAM SPIE ASA ASME Technical Committees of Multi-Body Systems Nonlinear Dynamics Dynamics and Control of Structures and Systems American Helicopter Society United States Aerospace Engineering and Mechanics University of Minnesota United States AIAA Thermophysics Technical Committee Mechanical and Aerospace Engineering University of Virginia United States AIAA Propellants and Combustion Technical Committee AIAA's Transition Study Group Aerodynamics Measurement Technology Technical Committee Thermophysics Technical Committee Japan MOSAIC project on the Technology Pressure-sensitive Paint Measurement System Japan High-Speed Flows Group Air Vehicles Directorate Air Force Research Laboratory Wright-Patterson Air Force Base United States Wright State University United States Aerospace Engineering and Engineering Mechanics United States United States Mechanical Engineering University of Pittsburgh United States School of Mechanical Engineering Purdue University United States Committee on Heat Transfer in Fire and Combustion Systems Japan Board of Advisors Central States Section Combustion Institute United States AIChE United States Tau Beta Pi United States

No abstract available

关键词： Institute of Space and Astronautical Science American Society of mechanical Engineers Direct Numerical Simulation Aerospace engineering MDO Propellant Air Forces Aerodynamics Heterogeneous Combustion NASA Langley Research Center

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Maximally sway point-to-point transportation of by a fir filtering approach of the motion command's

Maximally sway point-to-point transportation of by a fir fil...

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DETC2005: ASME International design engineering Technical Conferences and Computers and Information in engineering Conference

作者： Glosslotis, G. Antoniadis, I. National Technical University of Athens Department of Mechanical Engineering Machine Design and Control Systems Section P.O. Box 64078 Athens 15710 Greece

ISBN: (纸本)0791847381

A new method for sway suppression of boom crane loads is implemented, which is based on the application of appropriate filters on the motion commands. A typical boom crane mechanism is considered, which accomplishes independently the luffing and hoisting motions, needed for load grabbing, transfer and final positioning. The resulting dynamic model of the crane mechanism leads to a strongly non-linear and time varying problem. Properly designed Finite Impulse Response (FIR) filters are then applied to the typical motion commands of the system. The resulting filtered motion commands are shown to effectively suppress the payload sway during and after the motion of the mechanism, leading to a minimization of the operating cycle of the crane. Additionally, due to the smooth nature of the resulting motion, decreased stresses result on the crane structure and the motion components, and thus, the life cycle of the equipment can be extended. Copyright © 2005 by ASME.

关键词： FIR filters

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