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development of engineering courseware for university undergraduate teaching using computer animation

Computer Applications in Engineering Education 1995年第2期3卷 121-121页

作者： Tan, F.-L. Fok, S.-C. School of Mechanical and Production Engineering Nanyang Technological University Singapore 2263 Fock-Lai Tan:was born in Singapore in 1959. He received his BEng in mechanical engineering from the National University of Singapore in 1984 and his MSME degree in mechanical engineering from Rensselaer Polytechnic Institute Troy New York in 1992. He is currently a lecturer in the School of Mechanical and Production Engineering of the Nanyang Technological University. His research interest is in the area of modeling of casting processes. He has recently been active in the development of multimedia educational coursewares for university teaching. Sai-Cheong Fok:was born in Singapore in 1957. He received his diploma in production engineering from Singapore Polytechnic in 1977 BASc from the University of Ottawa Canada in 1985 and his PhD from Monash University Australia in 1990. He is currently a lecturer in the School of Mechanical and Production Engineering of the Nanyang Technological University. His research interest is in the area of robotics and control. He has also been active in the development of multimedia courseware for laboratory teaching.

Computer animation on personal computers (PC) is becoming increasingly popular as an educational teaching aid. With the increasing CPU power and high-resolution graphics of PC, and the rapid evolution of animation softwares, engineering courses can be developed on the PC using computer animation. Many engineering systems and processes in the engineering courses can be animated to enhance learning by university undergraduates. These animation projects could be developed into engineering courseware on certain subjects or topics for effective teaching in classrooms, at home, or as computer-aided laboratory lessons. Several types of animation software are introduced in this article.

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High-accuracy path-tracking by multi-axis coordination in CNC machines

High-accuracy path-tracking by multi-axis coordination in CN...

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International Conference on Industrial Electronics, control and Instrumentation

作者： K. Aoki N. Iwazawa T. Tsujisawa U. Sakaguchi E. Nakawatase Functional Devices Research Laboratories NEC Corporation Limited Kawasaki Japan Control Systems & FA Technologies Development Division NEC Corporation Limited Kawasaki Japan NEC Robotics Engineering Limited Yokohama Japan

A multi-axis coordinated control (MACC) system has been developed to achieve high-speed, high accuracy path-tracking in computerized numerically controlled (CNC) machines. Sharp changes in path speed or direction are kept within permitted acceleration levels by means of input command smoothing, which is achieved through the use of multi-axis coordination and a time-scaling method based on previewed velocity information. Since MACC is an online control method and can be modularized, it is easily incorporated into CNC machines. The results of both simulation and experimental testing of MACC on a CNC milling machine demonstrate its effectiveness and practical applicability. In high-speed milling, MACC has successfully reduced the path-tracking error to a greater degree than using the conventional post-interpolation filter method.< >

关键词： Computer numerical control Smoothing methods Nonlinear filters Velocity control National electric code control systems Acceleration Milling Motion control Servomotors

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A new discrete-time algorithm for simple adaptive control and its application to motor control

A new discrete-time algorithm for simple adaptive control an...

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International Conference on Industrial Electronics, control and Instrumentation

作者： H. Shibata G. Maruoka K. Yasaki B. Zhang Department of Computer and Systems Sciences College of Engineering University of Osaka Prefecture Osaka Osaka Japan OE Control Technology Research & Development Center Institute of Optics and Electronics Chinese Academy and Sciences Chengdu China

A discrete-time algorithm for simple adaptive control (SAG) was proposed by Shibata and Kurebayashi (1993). The algorithm solves the problem of additional time delay arising in discretization of continuous-time algorithm, and therefore becomes reliable in theoretical strictness. This paper applies the algorithm to the position control of a DC motor with variable load, Experimental results illustrate satisfactory performance even if the load is largely changed.< >

关键词： Adaptive control Motor drives control systems Sampling methods Programmable control Stability Application software Delay effects Position control DC motors

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NUMERICAL MODELING OF VISCOUS-FLOW IN SILICON THERMAL-OXIDATION WITH THE BOUNDARY-ELEMENT METHOD

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INTERNATIONAL JOURNAL OF NUMERICAL MODELLING-ELECTRONIC NETWORKS DEVICES AND FIELDS 1994年第1期7卷 15-24页

作者： PANJUKHIN, AV KOLOBOV, NA LEONTJEVA, NA Department of Technological Automatized Complexes Moscow Institute of Electronic Machinery (MIEM) B. Vuzovsky per. 3/12 109028 Moscow Russia AIexey V. Panjukhin was born in Russia in 1954. He received the Engineer degree in applied mathematics from the Moscow Institute of Electronic Machinery (MIEM) in 1977 and the Candidate of Sciences degree in microelectronics in 1984 from MIEM. He is at present an Assistant Professor in the MIEM. His present scientific activity lies in the areas of integrated circuit process simulation and numerical methods development. Nicolay A. Kolobov was born in Russia in 1938. He received the Engineer degree in solid state electronics from the Moscow Energetics Institute in 1961 the Candidate of Sciences degree in microelectronics from the Moscow Institute of Electronic Machinery in 1971 and the Doctor of Sciences degree in microelectronics from the MIEM in 1985. He is now a Full Professor in the MIEM. His research work has been focused for about thirty years on microelectronics technology especially on the physics and technology of the thermal oxidation of silicon. Natalya A. Leontjeva was born in Russia in 1968. She received the Engineer degree in automatized control systems from the Moscow Institute of Electronic Machinery in 1991. She is at present a postgraduate student in the MIEM. Her research work is in the area of silicon thermal oxidation modelling. She is currently working towards the Candidate of Sciences degree.

This paper describes the application of the boundary element method to solving two-dimensional steady slow viscous flow problems (creeping flow) in thermal silicon oxidation. The proposed method used the velocity-pressure formulation. The use of the incompressibility condition as a boundary condition and the application of the second Green's identity to transform the domain integral into a boundary integral result in a system of three boundary integral equations for velocity components and pressure. Solution of this system to be an ill-posed problem because of the presence of boundary conditions of the first kind. Two methods of regularization are employed. The numerical results for trench oxidation process are presented.

关键词： Semiconductor device manufacture

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HYBRID SATELLITE AND TERRESTRIAL NETWORKS

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INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS 1994年第3期12卷 313-327页

作者： CHITRE, DM SHYY, DJ EPHREMIDES, A GUPTA, S COMSAT Laboratories 22300 Comsat Drive Clarksburg MD 20871–9475 USA. Received his B.Sc. from the University of Bombay India an M.A. in mathematics from the University of Cambridge U.K. and a Ph.D. in physics from the University of Maryland. He is currently an Associate Executive Director of the Network Technology Division at COMSAT Laboratories. He has been involved in research and development activities in ISDN VSAT networks data communications and network systems and architectures. Prior to his current positions Dr. Chitre was a Principal Scientist in the Network Technology Division at COMSAT Laboratories. Dr. Chitre joined COMSAT Laboratories in 1980. He has made major contributions to the analysis and architecture of data communication ISDN and BISDN via satellite. Dr. Chitre directs and participates in the international and national standards activities in ISDN BISDN and data communication as they apply to satellite communication. He was Chairman of the Working Group on Protocols and Network Timing Function of the CCIR/CCITT Joint Ad Hoc Group on ISDN/Satellite Matters during 1990–1992. Currently he is the Chairman of the Working Group on New Technologies in the ITU Intersector Coordinating Group (ICG) on Satellite Matters. Dr. Chitre was a programme manager during 1990 and 1991 on a contract from INTELSAT on systems studies on satellite communications systems architectures for ISDN and broadband ISDN systems. Currently he is the technical manager of the DoD Contract on ATM via satellite demonstration and the programme manager for the INTELSAT contract on analysis and top-level specification of INTELSAT ISDN subnetworks and SDH compatible transport network. Received the B.S. degree in electrical engineering from national Chiao-Tung University Hsin-Chu Taiwan in 1983 and the M.S. and Ph.D. degrees in electrical engineering from Georgia Institute of Technology Atlanta GA in 1986 and 1990 respectively. From June 1987 to October 1987 he worked for the Department of Neurology Emory Univers

The role of satellite communications in networks that provide new services, such as frame relay and multimedia, is investigated. Both passive and active (on-board switching/processing) satellite systems are considered. Novel techniques are developed for each system to demonstrate, via detailed analysis and simulation, how the communications bandwidth agility of multipoint/broadcast satellite channels, and the on-board switching/processing, makes it feasible to provide these new services via hybrid satellite and terrestrial networks in a resource-efficient manner.

关键词： HYBRID NETWORKS ON-BOARD PROCESSING FRAME RELAY

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ASYNCHRONOUS TRANSFER MODE (ATM) OPERATION VIA SATELLITE - ISSUES, CHALLENGES AND RESOLUTIONS

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INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS 1994年第3期12卷 211-222页

作者： CHITRE, DM GOKHALE, DS HENDERSON, T LUNSFORD, JL MATHEWS, N COMSAT Laboratories 22300 Comsat Drive Clarksburg MD 20871 USA. Received his B.Sc. from the University of Bombay India an M.A. in mathematics from the University of Cambridge U.K. and a Ph.D. in physics from the University of Maryland. He is currently an Associate Executive Director of the Network Technology Division at COMSAT Laboratories. He has been involved in research and development activities in ISDN VSAT networks data communications and network systems and architectures. Prior to his current positions Dr. Chitre was a Principal Scientist in the Network Technology Division at COMSAT Laboratories. Dr. Chitre joined COMSAT Laboratories in 1980. He has made major contributions to the analysis and architecture of data communication ISDN and BISDN via satellite. Dr. Chitre directs and participates in the international and national standards activities in ISDN BISDN and data communication as they apply to satellite communication. He was Chairman of the Working Group on Protocols and Network Timing Function of the CCIR/CCITT Joint Ad Hoc Group on ISDN-Satellite Matters during 1990–1992. Currently he is the Chairman of the Working Group on New Technologies in the ITU Intersector Coordinating Group (ICG) on Satellite Matters. Dr. Chitre was a programme manager during 1990 and 1991 on a contract from INTELSAT on systems studies on satellite communications systems architectures for ISDN and broadband ISDN systems. Currently he is the technical manager of the DoD Contract on ATM via satellite demonstration and the programme manager for the INTELSAT contract on analysis and top-level specification of INTELSAT ISDN subnetworks and SDH compatible transport network. Department manager for ISDN/Data Communications in the Network Technology Division of COMSAT Laboratories. His responsibilities include managing the implementation of next generation telecommunication systems for fixed and mobile satellite systems. Current projects include the development of a high data rate gateway switch that provides for the

Key issues regarding the operation of the broadband integrated services digital network (BISDN) via satellite are presented herein. The specific issues, challenges, and their resolutions are detailed. In particular, the impact of error characteristics and propagation delay on the operation of BISDN via satellite is discussed. Solutions are presented for removing adverse effects and providing high-quality service to users of BISDN via satellite.

关键词： ATM BISDN

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MAIN PROPULSION POWER TAKE-OFF CONFIGURATION FOR AN ETC GUN PULSED-POWER GENERATOR

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NAVAL ENGINEERS JOURNAL 1994年第3期106卷 52-58页

作者： PETTERSEN, KE BIELITZ, CL CIANCI, J Kenneth E. Pettersen:graduated from the University of Maryland Baltimore County in J 978. He is a mechanical engineer in the power systems directorate of the Annapolis Detachment Carde-rock Division Naval Surface Warfare Center (formerly David Taylor Research Center) and has been with the Department of the Navy since 1981. Mr. Pettersen worked for the Naval Sea Systems Command from May 1981 until June 1985. He has been employed with NSWC Annapolis Detachment since June 1985. Charles L. Bielitz:is a mechanical engineer in the mechanical transmissions branch of Annapolis Detachment Carderock Division Naval Surface Warfare Center where he has worked for the past six years. He received his BSME from Virginia Polytechnic Institute in 1981. Prior to joining NSWC Annapolis he was employed by the General Electric Company in the medium steam turbine department. John Cianci:received his ASME from Tufts University in 1958 and his BSME from Tufts University in 1962. Mr. Cianci joined General Electric in 1954. He has thirty-seven years of experience in design manufacturing testing installation and customer support of high speed high power industrial marine and Navy gearing bearings couplings and lube systems. His experience includes positions of both engineer and manager in the areas of gear design gear products quality control and gear manufacturing engineering he is currently technical leader Gear Development Programs. He is a member of the American Gear Manufacturers Association and is on the Marine and High Speed Gearing committees.

Electro-Thermal Chemical (ETC) Gun technology will increase the range and capabilities of existing CIWS and 5 inch guns. Because of their faster, yet more controllable acceleration, ETC guns will allow for the utilization of smart munitions and, in the case of the 5 inch guns, increase range to beyond 50 nautical miles. This paper examines five power take-off (PTO) gear configurations from a surface ship class main reduction gears (MRG's) which drive a nominal 10 Megawatt (MW) Pulsed Power (PP) generator. The PP generator is utilized to charge a capacitor-based pulsed forming network (PFN) which, in turn, provides an electrical pulse to the cartridge of a munition at the breech of an ETC gun upon demand. The PTO gear and resultant placement of the generator will be the major focus of this paper. Major issues that will be examined will include space constraints within the main engine and auxiliary machinery rooms, gear sizing, survivability, shock and vibration, the penetration of watertight bulkheads with high speed shafting and equipment accessibility. Also, design guidelines for the PP generator will be provided. Special emphasis will be placed on the connection of the PTO gear to the MRGs.

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MPSA abstracts

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Journal of Protein Chemistry 1994年第5期13卷 515-543页

作者： Aminlari, Mahmoud Asquith, Thomas Sarlo, Katherine Bailey, Jerome M. Tu, Oanh Issai, Gilbert Ha, Alice Shively, John E. Bell, Alexander W. Baur, Nicole C. Bergeron, John J. M. Ou, Wei -Jia Thomas, David Y. Cianflone, Katherine Baldo, Allain Hincke, Maxwell T. Momparler, Richard L. Laliberté, Josée Thomson, David M. P. Sutherland, M. Besada, Vladimir Gonzalez, Javier Padron, Gabriel Garay, Hilda Reyes, Osvaldo Takao, Toshifumi Shimonishi, Yasutsugu Bischoff, Rainer Roecklin, Dominique Bouchon, Bernadette Klarskov, Klaus Van Dorsselaer, Alain Brake, Patricia G. Pacitti, Anne Higgins, Terry Stevis, Panos Malinowski, John McElhiney, Sue Huang, Janes Vestal, Christine Buckel, Scott D. Stevenson, Tracy Loo, Joseph A. Caffrey, Martin Wang, Jin Wallace, Carmichael J. A. Clark-Lewis, Ian Carraway, C. A. Carothers Huang, J. Li, Y. Juang, S. -H. Gallo, A. Mayer, B. J. Carraway, K. L. Coleman, Patrick L. Sarpong, Daniel Deerfield, David W. Holland-Minkley, Amanda Hempel, John D. Nicholas, Hugh B. Denslow, Nancy D. Folmar, Leroy C. Sullivan, Craig V. Dixon, James D. Mark, Jonathan P. Elicone, Christopher P. Maleknia, Simin D. McGuinness, Brian F. Regnier, Fred E. Afeyan, Noubar B. Dolence, Julia M. Poulter, C. Dale Egorov, Tsezi Musolyamov, Alexander Popineau, Yves Andersen, Jens Roepstorff, Peter Falkenstein, Roberto J. Biscoglio de Jiménez Bonino, Mirtha J. Peña, Clara Gauggel, D. L. Asquith, T. N. Isfort, R. J. Miller, N. S. Cody, D. B. Giblin, Michael F. Wong, Tuck C. Quinn, Thomas P. Grant, Gregory A. Crankshaw, Mark W. Griffith, Scott Schroeder, Steve Quinn, Thomas Guinet, F. Petillot, Y. Chapsal, J. M. Dubayle, J. Greco, F. Barge, O. Forest, E. Valentin, C. Hahn, Frederick M Baker, Jonathan A. Haniu, Mitsuru Kenney, William C. Rohde, Michael F. Harman, James G. Lee, Eun Ju Glasgow, Joel Lew, Sew Fen Belduz, Ali O. Harris, Reed J. Molony, Michael S. Keyt, Lene H. Wu, Shiaw -Lin Hawke, David H. Tso, Jaqueline Early, Sherrell Miller, Chad G. Hayman, G. Thomas Miernyk, Jan A. Hellman, Ulf Wernstedt, Christer Góñez, Jorge H Department of Biochemistry School of Veterinary Medicine Shiraz University Shiraz Iran Corporate Professional & Regulatory Services/Human Safety Dept. The Procter & Gamble Co. Cincinnati Division of Immunology Beckman Research Institute of the City of Hope Duarte Protein Analytic Facility Sheldon Biotechnology Centre USA McGill University Montreal Department of Anatomy USA Biotechnology Research Institute NRC Canada Division of Cardiology Royal Victoria Hospital USA Department of Anatomy University of Ottawa Faculty of Health Science Ottawa Centre de Recherche Pediatrique Hôpital Ste-Justine Université de Montréal Montreal Department of Immunology Montreal General Hospital USA Center for Genetic Engineering & Biotechnology Cuba Institute for Protein Research Osaka University Osaka Japan Protein Analytical Group TRANSGENE S.A. Strasbourg Cedex France Vakgroep Biochemie Fysiologie en Microbiologie Gent Belgium Laborat. de Spectrométrie de Masse Bioorganique URA 31 CNRS Université Louis Pasteur Strasbourg Cedex France Sterling winthrop Inc. Collegeville Lexin Pharmaceutical Corporation Horsham PerSeptive Biosystems Houston Parke-Davis Pharmaceutical Research Division of Warner Lambert Company Ann Arbor Dept. of Chemistry The Ohio State University Columbus USA Dept. of Biochemistry Dalhousie University Halifax Canada Biomedical Research Center University of British Columbia Vancouver Canada Dept. of Biochem. & Molec. Biol. Univ. of Miami Sch. of Medicine Miami The Rockefeller Institute New York Dept. of Cell Biol. & Anat. Univ. of Miami Sch. of Medicine Miami Biosciences Laboratory 3M Co. St. Paul Pittsburgh Supercomputing Center Pittsburgh Department of Molecular Genetics/Biochemistry University of Pittsburgh Pittsburgh Dept. Biochem. and Mol. Biol. University of Florida Gainesville U.S. Environmental Protection Agency Gulf Breeze Dept. Zoology North Carolina State University Raleigh PerSeptive Biosystems Inc. Cambridge Department of Chemistry Univ

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PERFORMANCE OF A PRIORITIZED ON-BOARD BASEBAND SWITCH FOR A MULTISERVICE MULTIBEAM SATELLITE

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INTERNATIONAL JOURNAL OF SATELLITE COMMUNICATIONS 1994年第3期12卷 283-297页

作者： BOHM, S ELHAKEEM, AK HACHICHA, M Department of Electrical and Computer Engineering Concordia University 1455 De Maisonneuve Blvd. West Montreal H3A 1M8 Canada Was born in Montreal Canada on 14 September 1966. He received the B. Eng. degree in electrical engineering from Concordia University Montreal Canada in 1989. He is at present completing the M.A.Sc. degree in electrical engineering at Concordia University. (S'75–S'79–M'79–SM'86) received the Ph.D. degree from Southern Methodist University Dallas TX in 1979. He spent the next two years working as a Visiting Professor in Egypt after which he moved to Ottawa Canada in 1982. He assumed teaching and research positions in Carleton and Manitoba Univerities and later moved to Concordia University Montreal Canada in 1983 where he is now a Professor in the Electrical and Computer Engineering Department. He has published numerous papers in IEEE and international journals in the areas of spread spectrum and networking. He is a well-known expert in these areas and serves as a consultant to many companies. His current research interests include wide-band metropolitan networks switching architectures and performance of on-board multibeam satellites acquisitionless CDMA networks code distribution and orthogonalization of CDMA signals responsive congestion control for ATM-based networks ARQ techniques and investigation of the novel SUGAR CDMA systems in fading channels. Dr. Elhakeem is a Senior Member of the Canadian Electrical Engineering Society and Armed Forces Association. He has chaired numerous technical sessions in IEEE Conferences was the Technical Program Chairman for IEEE Montech 1986 Montreal Canada. Dr. Elhakeem is the key guest editor of theIEEE Journal of Selected Areas in Communicationsfor the May June issues 1993 covering CDMA networks. Advanced Technology & Networks VISTAR Telecommunications Inc. Ottawa Ontario K1G 3J4 Canada An Associate Director of Advanced Technology & Networks Group VISTAR Telecommunications Inc. Ottawa Canada. He is also an Adjunct Pr

In this paper, we study the performance of a prioritized on-board baseband switch in conjunction with a multibeam satellite handling integrated services. The services considered for the analysis include voice, video, file transfer and interactive data. The prioritized switch uses both input and output buffering, switch speed-up as well as a two-phase head-of-line resolution algorithm, in order to reduce the buffer loss while maintaining acceptable user delays. The minimum required buffer capacity and switch speed-up for each service in a prioritized environment are found under uniform traffic conditions. It is shown that under uniform traffic conditions, only minimal buffering and switch speed-up are needed even for the lowest priority users. The performance dependence on the switch size is also substantially reduced with head of line resolution and buffering even in a prioritized environment.

关键词： SWITCH ON-BOARD BASEBAND MULTIBEAM PRIORITIZED HEAD-OF-LINE UNIFORM LOAD SPEED-UP

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A High Precision Synchronizing control System for Biaxial Positioning Tables

A High Precision Synchronizing Control System for Biaxial Po...

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American control Conference (ACC)

作者： S. M. Shahruz A. K. Pradeep Berkeley Engineering Research Institute Berkeley CA USA Control Systems Laboratory General Electric Corporate Research and Development Center Schenectady NY USA

In this paper, a control system is designed that synchronizes the motions of biaxial positioning tables. The control system consists of nonlinear feedback laws of the displacements and the velocities of the table along its axes. The designed control system successfully generates desired contours on the workpiece by synchronizing the motions of the biaxial table along its axes, and compensates for the effects of parametric uncertainty and disturbance to the system.

关键词： control systems Velocity control Tellurium Motion control Machining Torque Tin

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