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development of transient stability controller system (TSC) based on on-line stability calculation

ELECTRICAL ENGINEERING IN JAPAN 1996年第4期117卷 61-79页

作者： Ota, H Inoue, T Ito, H Fukushima, N Omata, K Morita, K Kokai, Y Chubu Electric Power Co. Graduated in 1955 from the Department of Electrical Engineering of the Faculty of Engineering University of Tokyo and joined Chubu Electric Power Co. in the same year. He is engaged mainly in developing technology for construction planning as well as protection stabilization and automatic control of power systems. He is currently a Director and Vice President of the company. He received an OHM Technology Award in 1971 and an Achievement Award from the I.E.E. Japan in 1992. Graduated in 1962 from the Department of Electrical Engineering Shibaura Institute of Technology and joined Chubu Electric Power Co. in the same year. He is engaged in the development of technology for large-scale centralized control of power systems as well as the networking of control computers. He is currently a System Analysis Group Chief in the System Operation Division of the company. Graduated in 1985 from the Department of Electronics and Electrical Engineering of the Faculty of Engineering Tokyo Institute of Technology and joined Chubu Electric Power Co. in the same year. He is engaged mainly in the development of technology for power system protection and stabilization. He is currently working in the System Analysis Group of the System Operation Division of the company. Toshiba Corporation Graduated in 1967 from the Department of Electrical Engineering University of Tokyo and joined Toshiba Corporation in the same year and engaged in development of power system control systems in Japan and abroad. He is currently a Chief of System Technology in the Power System Technology Division of the company. He is a member of the Theses Subcommittee of the 1995 World Energy Conference. He is an Assistant Secretary of the Japanese Committee of CIGRE and a member of the Japanese Subcommittee of CIGRE SC35 and 39. He is a member of IEEE. Completed his Master's course at the Science and Engineering Research Division of the Graduate School Waseda University in 1980 and joined Toshiba Corporation in the same year. H

A new transient stability controller system (TSC) based on on-line transient stability calculation has been developed. The TSC system prevents the power system from wide-area blackout by shedding generators optimally when a serious fault occurs. This system consists of a central processing unit (TSC-P), and four local units for fault detection (TSC-C), and seventeen units for generator shedding(TSC-T). The TSC-P selects optimal generators to be shed for stabilization based on on-line transient stability calculation for contingencies at 500 kV lines and buses every five minutes. The results are transmitted to the TSC-Cs periodically. Should any fault occur, only one TSC-C will detect the fault occurrence and send control signals to the TSC-Ts which actually generate shedding signals. To realize the TSC system, essential are fast stability evaluation methods for a large number of contingencies and effective selection methods of optimal generators to be shed for stabilization. This paper presents total algorithms applied in the TSC-P, the results of algorithm verification tests using a prototype system combined with a large-scale analog simulator, and the characteristics of the actual system.

关键词： power system stabilization generation shedding on-line stability calculation screening parallel calculation

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A study of the electromagnetic vibration of a capacitor induction motor caused by time-harmonic voltages

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ELECTRICAL ENGINEERING IN JAPAN 1996年第6期117卷 86-99页

作者： Hirotsuka, I Tsuboi, K Itoh, Y Ueda, F Matsui, K Chubu University A Lecturer at Chubu University College of Engineering Department of Electrical Engineering. He received his M. Eng. degree in 1986 and Dr. of Eng. later both from Chubu University. He worked for Mitsubishi Electric Corporation from April 1986 to August 1986. He is a member of the Institute of Electrical Engineers of Japan and the Institute of Electrical Installation Engineers of Japan. A Professor at Chubu University. He received his M. Eng. degree in 1973 from Chubu Institute of Technology (now Chubu University) and his Dr. of Eng. degree from Kyusyuu University later. His research interests are in the fields of power electric drives and control systems. His major research area is rotating electrical machines. He is a member of IEEE and the Institute of Electrical Engineers of Japan. A graduate student in the Master's program at Chubu University. He received his B. Eng. degree in 1985 from Chubu University. Joined Chubu Electric Power Co. Inc. in 1982 and is now a Research Engineer in the Electric Power Research and Development Center. He received his M. Eng. degree in Electrical Engineering from Chubu University in 1982. He did research on harmonics on distribution line. He is a member of the Institute of Electrical Engineers of Japan. A Professor at Chubu University. He received his B. Eng. degree in 1965 from Ehime University and his Dr. Eng. degree in 1982 from Tokyo Institute of Technology. His interest areas include development of appliances with semiconductors. He is a member of IEEE and the Institute of Electrical Engineers of Japan.

In recent years, power source voltage waveform distortion has become noticeable, as electrical appliances with rectifier circuits have become widely used. Connecting capacitor inductor motor (CRM) to such distorted supply, or controlling CRM by simple controller with a switching device (such as triacs), harmonic voltage is supplied to CRM. In that case, CRM produces electromagnetic vibrations caused by not only the fundamental voltage but also time-harmonic voltages in the distorted voltage. In addition, CRM produces electromagnetic vibration due to backward magnetic fields. Thus, it is difficult to clarify a relationship between electromagnetic vibration of CRM and harmonic voltages. In this paper, the causes of the electromagnetic vibration of CRM operating under distorted wave supply voltage are discussed. First, a general equation of dominant electromagnetic force waves is shown considering not only forward magnetic fields but also backward magnetic fields. Using a general equation, causes of dominant electromagnetic vibration can be clarified. Next, by discussing in detail some examples of the dominant vibration, the relationship between the vibration and harmonic voltages becomes evident. Furthermore, the relationship between the vibration and backward magnetic field is clarified.

关键词： capacitor induction motor electromagnetic vibration harmonic voltage equivalent circuit backward magnetic field

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A data acquisition system for machine tool condition monitoring .2. Some of the signals acquired

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QUALITY AND RELIABILITY ENGINEERING INTERNATIONAL 1996年第1期12卷 19-26页

作者： Drake, PR Jennings, AD Grosvenor, RI Systems Engineering Division Cardiff School of Engineering University of Wales Cardiff PO Box 917 Newport Road Cardiff CF2 1XH U.K. Paul Drake:has a B.Sc. in Statistics an M.Sc. in Systems Engineering and a Ph.D. in Fault Diagnosis from the University of Wales. He gained several years experience of developing information systems while working in industry. At present he is a lecturer in Systems Engineering at the Cardiff School of Engineering within the University of Wales Cardiff. He is an active researcher in the field of machine condition monitoring and fault diagnosis in collaboration with industrial partners. He is also involved in the application of artificial intelligence techniques within manufacturing. He is a Chartered Engineer and a member of the Institution of Electrical Engineers. July 1994 saw the publication of a book entitledCondition Based Maintenance and Machine Diagnosticsof which he was co-author. Alun Jennings:has a B.Sc. in mechanical engineering from Portsmouth Polytechnic and an M.Sc. from Manchester University. He is a chartered mechanical engineer with experience in fault diagnosis and product development. Currently he is employed as a research associate at Laser Zentrum Hannover. Roger Grosvenor:is an IT lecturer in Systems Engineering at the Cardiff School of Engineering within the University of Wales Cardiff. His teaching covers reliability engineering instrumentation and measurement and digital control. His main research interests are in-process measurement on machine tools and condition monitoring of machine tools. Prior to his ten years at UWCC he was a development engineer in the heating and ventilation industry. He holds a B. Eng. in mechanical engineering and an M. Eng. both from the University of Wales and is a member of the Institute of Measurement and Control.

This paper presents some of the machine tool condition monitoring signals logged by the data acquisition system (DAS) designed and implemented as part of the European Union research project BREU-CT91-0463. Cause and effect relationships between machine components and signal features are highlighted, along with a demonstration of the suitability of vibration signal kurtosis as a measure of machine tool spindle bearing condition.

关键词： condition monitoring machine tools

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Trajectory control of controlled-PM linear synchronous motor magnetic levitation vehicle - FEM dynamics simulations and experiments in mass-reduced-control mode

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ELECTRICAL ENGINEERING IN JAPAN 1996年第4期116卷 120-131页

作者： Yoshida, K Takami, H Yokota, D Nishitani, M Sonoda, A Kyushu University Ph.D. degree in 1971 from the Engineering Research Division Kyushu University. He became a Research Associate in April 1971 and an Associate Professor in October 1974. He has been a Professor since September 1987 in the Department of Electrical Engineering Kyushu University. He was an Alexander von Humboldt Researcher (Technische Universität Braunschweig) from 1982 to 1983 1984 and 1986. He is engaged in research and development mainly in the fundamental theory simulations and its industrial applications of new linear motor Maglev systems. He received a Paper Award from the I.E.E. Japan in 1971. He is a member of the Japan Society for Simulation Technology. Master's degree in 1985 from the Engineering Research Division Kyushu University. He received his Ph.D. degree later. He became a Research Associate in the Department of Electrical Engineering Yamaguchi University in April 1985. He has been a Research Associate in the Department of Electrical Engineering since March 1993. He is engaged mainly in research and development of linear motors by simulations and experiments. He is a member of the Society of Instrument and Control Engineers. Graduated in March 1993 from the Department of Electrical Engineering Kyushu University where he is currently in the Master's program. He is engaged in research on the levitation and running simulations of Maglev vehicles. Graduated in March 1993 from the Department of Electrical Engineering Kyushu Institute of Technology. He enrolled in his Master's program at the Engineering Research Division Kyushu University in April 1993. He is engaged in research on the levitation simulation and experiments of Maglev vehicles. Graduated in March 1992 from the Department of Electrical Engineering Kyushu Electrical Engineering College. He has been an Educational Technical Officer in the Department of Electrical Engineering Kyushu University since April 1992. He is engaged in research on linear motor Maglev systems.

A novel magnetic levitation train system can be constructed by using a long-stator controlled-PM linear synchronous motor having propulsion and attractive-mode levitation functions and minimum loss. Realizing this system requires simplifying manufacture of the long-stator guideway. In the long-stator on the ground, semiclosed large slots are adapted and designed for one-turn coils of a waveform to be easily installed. The large slots cause the PM LSM detent forces to give strong influences on dynamic operations of the running vehicle. A two-dimensional FEM used for the dynamics simulations is capable of precisely analyzing the detent forces produced between the stator teeth and the PMs. This paper presents FEM dynamics simulations and experiments in mass-reduced-control mode of a 1/2 scale model magnetic levitation vehicle supported by small rubber rollers. The simulation model developed here includes the vehicle speed performance, position sensors and drag force due to friction between rubber roller and rail. The detent force problem in propulsion motion is successfully solved by adapting the feedback control of the vehicle propulsion based on the I-10-controlled method. The trajectory control is thus accomplished for the vehicle to follow speed and position patterns. The dynamics simulations are verified from the experiments. The simulation program proposed here enables us to investigate the magnetic levitation train system, including LSM design and vehicle dynamic operations.

关键词： controlled-PM LSM magnetic levitation finite element method detent force

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MOBILE ROBOT LOCALIZATION USING A SINGLE ROTATING SONAR AND 2 PASSIVE CYLINDRICAL BEACONS

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ROBOTICA 1995年第3期13卷 243-252页

作者： BEOM, HR CHO, HS Research & Development Laboratory Gold Star Industrial Systems CO. Ltd. Anyang (Korea). Center for Robotics and Automation Department of Precision Engineering and Mechatronics Korea Advanced Institute of Science and Technology373–1 Kusong-dongTaejeon305–701 (Korea).

This paper proposes a new method of estimating the position and heading angle of a mobile robot moving on a flat surface. The proposed localization method utilizes two passive beacons and a single rotating ultrasonic sensor. The passive beacons consist of two cylinders with different diameters and reflect the ultrasonic pulses coming from the sonar sensor mounted on the mobile robot. The sonar sensor, again, mounted on a pan-tilt device then receives the reflected pulses while scanning over a wide area. The geometric parameter set of beacon is acquired from the sonar scan data obtained at a single mobile robot location using a new data processing algorithm. The presented algorithm is especially suitable for processing the sonar scan data obtained by ultrasonic sensor with wide beam spread. From this parameter set, the position and heading angle of the mobile robot is determined directly. The performance and validity of the proposed method are evaluated using two beacons and a single sonar sensor attached at the pan-tilt device mounted on a mobile robot, named LCAR, in our laboratory.

关键词： MOBILE ROBOT SONAR BEACON LOCALIZATION

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Photonic transport networks based on optical paths

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INTERNATIONAL JOURNAL OF COMMUNICATION systems 1995年第6期8卷 377-389页

作者： Sato, KI Okamoto, S Watanabe, A NTT Optical Network Systems Laboratories 1-2356 Take Yokosuka-shi Kanagawa 238 Japan Ken-ichi Sat0 received the B.S. M.S. and Ph.D. degrees in electronics engineering from the University of Tokyo Tokyo Japan in 1976 1978 and 1986 respectively. In 1978 he joined Yokosuka Electrical Communication Laboratories IT. During 1978–1984 he was engaged in the research and development of optical fibre transmission technologies. His R&D experiences cover fibre optic video transmission systems for CATV distribution systems and subscriber loop systems. Since 1985 he has been actiie in the development of broadband ISDN based on ATM techniques. His main research interests include information transport network architectures variable network architectures with virtual paths broadband transport technology ATM network performance analysis and photonic networks based on optical paths. He has over 90 research publications in international journal and conferences. He is serving as a member of the Advisory Board of the International Journal of Communication Systems. He is currently a group leader of the Photonic Network Research Group in Optical Network Systems Laboratories at NTT. Dr Sat0 received the Young Engineer Award in 1984 and the Excellent Paper Award in 1991 both from the Institute of Electronics Information and Communication Engineers (IEICE) of JAPAN. Dr Sato is a member of the IEICE of JAPAN and a senior member of the IEEE Communications Society. Atsushi Watanabe received the B.S. and M.S. degrees in Information Science from Ibaraki University in 1989 and 1991 respectively. In 1991 he joined the Transmission Systems Laboratories Nippon Telegraph and Telephone Corporation Yokosuka Kanagawa Japan. From 1991 he was engaged in research on traffic control in ATM networks. Since 1993 he has been engaged in research on optical path cross-connect system architectures. Mr Watanabe is a member of the Institute of Electronics Information and Communication Engineers (IEICE) of Japan.

This paper explores the technologies that will enable a further leap forward in transport network evolution. First, requirements of the future transport network are elucidated. Existing network cost is evaluated and the viable means to reduce transport network cost are identified. It is demonstrated that optical path technologies such as WP (wavelength path) and VWP (virtual wavelength path) will play a key role in this. They enhance not only transmission capacity but also cross-connect node throughput cost-effectively by capitalizing on the wavelength routeing scheme. Optical path realization technologies focusing on optical path cross-connect systems are examined. Requirements for the optical path cross-connect system are then elucidated, and a new cross-connect system architecture is evaluated. The architecture exploits PLC (planar lightwave circuit) and other commercially available technologies suitable for large-scale production. The evaluations include cross-connect node upgradability, modular growth capability, total node cost, optical loss and switching power consumption. It is proved that the architecture has significant advantages over existing switch architectures. The optical path technologies provided in this paper will pave the way for a new transport network paradigm, a ubiquitous, bandwidth-abundant and affordable broadband ISDN.

关键词： optical path optical path cross-connect BISDN photonic transport network

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development of engineering courseware for university undergraduate teaching using computer animation

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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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A DATA-ACQUISITION SYSTEM FOR MACHINE-TOOL CONDITION MONITORING

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QUALITY AND RELIABILITY ENGINEERING INTERNATIONAL 1995年第1期11卷 15-26页

作者： DRAKE, PR JENNINGS, AD GROSVENOR, RI WHITTLETON, D Systems Engineering Division School of Engineering University of Wales College of Cardiff (UWCC) PO Box 917 Newport Road Cardiff CF2 1XH U.K. Paul Drake:has a B.Sc. in Statistics an M.Sc. in Systems Engineering and a Ph.D. in Fault Diagnosis from the University of Wales. He gained several years experience of developing information systems while working in industry. At present he is a lecturer in Systems Engineering at the Cardiff School of Engineering within the University of Wales College of Cardiff. He is an active researcher in the field of machine condition monitoring and fault diagnosis in collaboration with industrial partners. He is also involved in the application of artificial intelligence techniques within manufacturing. He is a Chartered Engineer and a member of the Institution of Electrical Engineers. July 1994 saw the publication of a book entitledCondition Based Maintenance and Machine Diagnosticsof which he was a co-author. Alun Jennings:has a B.Sc. in mechanical engineering from Portsmouth Polytechnic and an M.Sc. from Manchester University. He is a chartered mechanical engineer with experience in fault diagnosis and product development. Currently he is employed as a research associate at UWCC on the MIRAM project. Roger Grosvenor:is an IT lecturer is Systems Engineering at the Cardiff School of Engineering within the University of Wales College of Cardiff. His teaching covers reliability engineering instrumentation and measurement and digital control. His main research interests are in-process measurement on machine tools and condition monitoring of machine tools. Prior to his ten years at UWCC he was a development engineer in the heating and ventilation industry. He holds a B. Eng. in mechanical engineering and an M. Eng. both from the University of Wales and is a member of the Institute of Measurement and Control. He is currently a principal investigator on two European research grants in the field of condition monitoring and maintenance of machine tools. David Whittleton:is a pract

A flexible, generically applicable and inexpensive data acquisition system (DAS), for machine tool condition monitoring, has been designed, constructed and installed as part of a European Union sponsored project. The DAS is more than just a data logger and an array of sensors. It also consists of a methodology for analysing data logging requirements and a relational database that supports this methodology. The database is held on a central 'maintenance management' computer. The monitoring to be carried out by the DAS is specified through this database, which contains detailed information about the DAS's facilities. This feature makes it simple to reconfigure the DAS to implement new monitoring requirements and to customize its operation to meet the the needs of different machines. The information in the database is transformed into a look-up table that is read by the software that sets up and controls the data logging processes.

关键词： CONDITION MONITORING DATA ACQUISITION MACHINE TOOLS

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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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