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IEEE International Conference on Micro Electro Mechanical systems

作者： K. Ikuta M. Tsukamoto S. Hirose Department of Mechanical System Engineering Faculty of Computer Science and System Engineering Kyushu Institute of Technology Fukuoka Japan Asahi Chemical Industry Company Limited Tokyo Japan Department of Mechanical Engineering Science Faculty of Engineering Tokyo Institute of Technology Japan

An advanced mathematical model of a shape memory alloy (SMA) useful for designing SMA micro-devices is proposed and applied to coil spring theory to analyze the appropriate mechanical and electrical characteristics. This model can handle three phases of the SMA: the parent phase, the martensitic phase, and the R-phase. of three steps. First, the mechanical properties of the three phases are modeled at the solid mechanics level. Second, a model of thermoelectric transformation is obtained at the thermodynamic level. Finally, the first and second steps are combined. The model was applied to coil spring theory and was verified successfully by experiments under general conditions.< >

关键词： Mathematical model Shape memory alloys Microactuators Temperature Annealing Design engineering Coils Springs Actuators systems engineering and theory

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The VC-dimension versus the statistical capacity of multilayer networks 91

The VC-dimension versus the statistical capacity of multilay...

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Proceedings of the 5th International Conference on Neural Information Processing systems

作者： Chuanyi Ji Demetri Psaltis Department of Electrical Computer and System Engineering Rensselaer Polytech Institute Troy NY and Department of Electrical Engineering California Institute of Technology Pasadena CA Department of Electrical Engineering California Institute of Technology Pasadena CA

ISBN: (纸本)9781558602229

A general relationship is developed between the VC-dimension and the statistical lower epsilon-capacity which shows that the VC-dimension can be lower bounded (in order) by the statistical lower epsilon-capacity of a network trained with random samples. This relationship explains quantitatively how generalization takes place after memorization, and relates the concept of generalization (consistency) with the capacity of the optimal classifier over a class of classifiers with the same structure and the capacity of the Bayesian classifier. Furthermore, it provides a general methodology to evaluate a lower bound for the VC-dimension of feedforward multilayer neural *** general methodology is applied to two types of networks which are important for hardware implementations: two layer (N - 2L - 1) networks with binary weights, integer thresholds for the hidden units and zero threshold for the output unit, and a single neuron ((N - 1) networks) with binary weigths and a zero threshold. Specifically, we obtain O(W/lnL) ≤ d2 ≤ O(W), and d1 - O(N). Here W is the total number of weights of the (N - 2L - 1) networks. d1 and d2 represent the VC-dimensions for the (N - 1) and (N - 2L - 1) networks respectively.

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Development of miniature cybernetic actuator driven by piezoelectric device

Development of miniature cybernetic actuator driven by piezo...

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Proceedings IROS '91:IEEE/RSJ International Workshop on Intelligent Robots and systems '91

作者： K. Ikuta A. Kawahara Y. Tsutsui Department of Mechanical System Engineering Faculty of Computer Science and System Engineering Kyushu Institute of Technology Fukuoka Japan Research Laboratory Yaskawa Electric Manufacturing Company Limited Kitakyushu Japan

New types of miniature actuators so called cybernetic actuator for biomedical robotics are developed. The cybernetic actuator has four driving states: free, increasing, decreasing and lock. The state of free and lock provides safety characteristics for both human and mechanism by avoiding damage from overload. The rotary type and linear type of cybernetic actuators are designed and developed. Feasibility of both actuators is verified by experiments. Four driving states are confirmed and unique driving principle is verified successfully.< >

关键词： Cybernetics Piezoelectric actuators Piezoelectric devices Humans Pneumatic actuators Safety Hydraulic actuators Muscles Mechanical systems systems engineering and theory

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Miniature cybernetic actuators using piezoelectric device

Miniature cybernetic actuators using piezoelectric device

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IEEE International Conference on Micro Electro Mechanical systems

作者： K. Ikuta A. Kawahara S. Yamazumi Department of Mechanical System Engineering Faculty of Computer Science and System Engineering Kyushu Institute of Technology Fukuoka Japan Research Laboratory Yaskawa Electric Manufacturing Company Limited Kitakyushu Japan

A new type of miniature actuator, the so-called cybernetic actuator, for medical application has been proposed and developed. The cybernetic actuator has four driving states: free, increasing, decreasing and locked. A rotary-type cybernetic actuator and a linear-type cybernetic actuator driven by piezoelectric devices have been constructed. The feasibility of both actuators was verified by driving experiments.< >

关键词： Cybernetics Piezoelectric actuators Piezoelectric devices Pneumatic actuators Humans Hydraulic actuators Muscles Friction Mechanical systems Biomedical engineering

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Automatic 3D Measurement system by the Grid Illumination Type Moire Method

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Journal of Robotics and Mechatronics 1991年第3期3卷 177-183页

作者： Arai, Yasuhiko Yokozeki, Shunsuke Yamada, Tomoharu Department of Mechanical Engineering Faculty of Engineering Kansai University 3-3-35 Yamatetho Osaka Suita564 Japan Department of Mechanical System Engineering Faculty of Computer Science and System Enginecring Kyushu Institute of Technology 680-4 Kawazu. Iizuka Fukuoka820 Japan

This paper describes an installation of the fringe scanning method into a shadow-type Moire Topography. The result is a high-precision three-dimensional measuring system and automatic fringe order measuring system using a liquid crystal p:ate. A description of this fullyautomatic measuring system, which does not require the user to have knowledge of measuring instruments, is alse provided. This system was constructed by achieving the automation of Moire topography, which is regarded as difficult due to problems concerning the linkage of independent processes. The validity of the system is illustrated by experimental results for spheres and for planes with a difference in level. © 1991, Fuji technology Press. All rights reserved.

关键词： Liquid crystals

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Automatic Fringe Analysis of Moiró Interferometry

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Journal of Robotics and Mechatronics 1991年第3期3卷 184-189页

作者： Arai, Yasuhiko Kurata, Tadao Yokozeki, Shunsuke Department of Mechanicat Engineering Faculty of Engineering Kansai University 3-3-3.S. Yamate-cho. Suita Oosaka564 Japan Department of Mechanical System Engineering Faculty of Computer Science and System Engineering Kyushu lnstitute ot' Technology 680-4 Kasvazu lizuka Fukuoka820 Japan

The phase analysis of fringes by apptying moife techniques to the interferometer is well-known. Since this method is based on 2-D subtraction method in the incoherent optics, the distortion of the optical system is easily removed and a :arge aperture interferometer can be constructed. In this paper, a novel automatic method to detect phase of fringes was proposed by combining the conception of moir6-interferometer with a microcomputer system. The validity of the method is shown by experimental results in the phase analysis of fringes of stide-glasses. Furthermore, this system was applied to the measurement of pressure distributions in a Laval nozzle, and the measured results approximately coincided with the theoreticar values. These results suggest that the system is well applicable to the fields of fluid mechanics. © 1991, Fuji technology Press. All rights reserved.

关键词： Interferometers

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Kerr constant frequency dependence in liquid nitrogen

Kerr constant frequency dependence in liquid nitrogen

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International Conference on Properties and Applications of Properties and Applications of Dielectric Materials

作者： K. Imai A. Kanematsu M. Nawata M. Zahn Department of Electrical and Electronic Engineering Faculty of Science and Technology Meijo University Nagoya Japan Department of Electrical Engineering and Computer Science Laboratory for Electromagnetic and Electronic System High Voltage Research Laboratory Massachusetts Institute of Technology Cambridge MA USA

Kerr electro-optic field mapping measurements using the sensitive AC modulation method were made in liquid nitrogen. The steady-state electric fields between parallel stainless steel electrodes that had a gap of 7 mm are shown to be essentially uniform for voltages up to 70 kV with no significant space charge distortion. The Kerr constant B of liquid nitrogen is constant over the AC modulation frequency range of 1-20 kHz, while increasing above 20 kHz. This change of B with the modulation frequency coincides with the frequency-amplitude gain characteristic of the lock-in amplifier used, so that B is independent of the AC modulation frequency within the range of this study. B monotonically decreases with increasing temperature, T, thus decreasing liquid nitrogen density, rho , so that B is related linearly to rho /T. The polarizability anisotropy of liquid nitrogen is evaluated to be 8.3*10/sup -41/ F-m/sup 2/ from the slope of the B-( rho /T) characteristic, obtained from a simple physical model.< >

关键词： Frequency dependence Nitrogen Chirp modulation Frequency modulation Distortion measurement Electrooptic modulators Steady-state Electric fields Steel Electrodes

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Development of Long Span, High Linear Scane by Moire Precision Absolute Fringes

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Journal of Robotics and Mechatronics 1991年第3期3卷 211-214页

作者： Arai, Yasuhiko Yokozeki, Shunsuke Yamada, Tomoharu Kansai University Department of Mechanical Engineering Faculty of Engineering 3-3-35. Yamate-cho. Osaka Suita564 Japan Kyushu Institute of Technology Department of Mechanicat System Engineering Faculty of Computer Science and System Engineering 680-4. Kawazu. Fukuoka Iizuka820 Japan

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FULL-WAVE SOLUTION OF DIELECTRIC LOADED WAVE-GUIDES AND SHIELDED MICROSTRIPS UTILIZING FINITE-DIFFERENCE AND THE CONJUGATE-GRADIENT METHOD

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INTERNATIONAL JOURNAL OF MICROWAVE AND MILLIMETER-WAVE computer-AIDED engineering 1991年第4期1卷 346-357页

作者： NARAYANAN, V MANELA, M LADE, RK SARKAR, TK Department of Electrical and Computer Engineering Syracuse University Syracuse New York 13244-1240 Viswanathan Narayanan was born in Bangalore India on December 14 1965. He received the BE degree in Electronics and Communications from B.M.S. College of Engineering Bangalore in 1988. He joined the Department of Electrical Engineering at Syracuse University for his graduate studies in 1989 where he is currently a research assistant. His research interests are in microwave measurements numerical electromagnetics and signal processing. Biographies and photos are not available for M. Manela and R. K. Lade. Tapan K. Sarkar (Sf69-M'76-SM'X1) was born in Calcutta. India on August 2 1948. He received the BTech degree from the Indian Institute of Technology Kharagpur India in 1969 the MScE degree from the University of New Brunswick Fredericton Canada in 1971. and the MS and PhD degrees from Syracuse University. Syracuse NY in 1975. From 1975-1976 he was with the TACO Division of the General Instruments Corporation. He was with the Rochester Institute of Technology (Rochester NY) from 1976-1985. He was a Research Fellow at the Gordon Mckay Laboratory Harvard University Cambridge MA from 1977 to 1978. He is now a Professor in the Department of Electrical and Computer Engineering Syracuse University. His current research interests deal with numerical solutions of operator equations arising in electromagnetics and signal processing with application to system design. He obtained one of the “ best solution” awards in May 1977 at the Rome Air Development Center (RADC) Spectral Estimation Workshop. He has authored or coauthored more than 154 journal articles and conference papers and has written chapters in eight books. Dr. Sarkar is a registered professional engineer in the state of New York. He received the Best Paper Award of the IEEE Transactions on Electromagnetic Compatibility in 1979. He was an Associate Editor for feature articles of the lEEE Antennas arid Propagation Sociefy Newsletter and was

Dynamic analysis of waveguide structures containing dielectric and metal strips is presented. The analysis utilizes a finite difference frequency domain procedure to reduce the problem to a symmetric matrix eigenvalue problem. Since the matrix is also sparse, the eigenvalue problem can be solved quickly and efficiently using the conjugate gradient method resulting in considerable savings in computer storage and time. Comparison is made with the analytical solution for the loaded dielectric waveguide case. For the microstrip case, we get both waveguide modes and quasi-TEM modes. The quasi-TEM modes in the limit of zero frequency are checked with the static analysis which also uses finite difference. Some of the quasi-TEM modes are spurious. This article describes their origin and discusses how to eliminate them. Numerical results are presented to illustrate the principles.

关键词： Waveguides

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ROLE OF SIMULATION IN RAPID PROTOTYPING FOR CONCEPT DEVELOPMENT

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NAVAL ENGINEERS JOURNAL 1991年第3期103卷 204-211页

作者： KING, JF BARTON, DE J. Fred King:is the manager of the Advanced Technology Department for Unisys in Reston Virginia. He earned his Ph.D. in mathematics from the University of Houston in 1977. He has been principal investigator of research projects in knowledge engineering pattern recognition and heuristic problem-solving. Efforts include the development of a multi-temporal multispectral classifier for identifying graincrops using LANDSAT satellite imagery data for NASA. Also as a member of the research team for a NCI study with Baylor College of Medicine and NASA he helped develop techniques for detection of carcinoma using multispectral microphotometer scans of lung tissue. He established and became technical director of the AI Laboratory for Ford Aerospace where he developed expert scheduling modeling and knowledge acquisition systems for NASA. Since joining Unisys in 1985 he has led the development of object-oriented programming environments blackboard architectures data fusion techniques using neural networks and intelligent data base systems. Douglas E. Barton:is manager of Logistics Information Systems for Unisys in Reston Virginia. He earned his B.A. degree in computer science from the College of William and Mary in 1978 and did postgraduate work in London as a Drapers Company scholar. Since joining Unisys in 1981 his work has concentrated on program management and software engineering of large scale data base management systems and design and implementation of knowledge-based systems in planning and logistics. As chairman of the Logistics Data Subcommittee of the National Security Industrial Association (NSIA) he led an industry initiative which examined concepts in knowledge-based systems in military logistics. His responsibilities also include evaluation development and tailoring of software engineering standards and procedures for data base and knowledge-based systems. He is currently program manager of the Navigation Information Management System which provides support to the Fleet Ballistic Missile Progr

A valuable technique during concept development is rapid prototyping of software for key design components. This approach is particularly useful when the optimum design approach is not readily apparent or several known alternatives need to be rapidly evaluated. A problem inherent in rapid prototyping is the lack of a "target system" with which to interface. Some alternatives are to develop test driver libraries, integrate the prototype with an existing working simulator, or build one for the specific problem. This paper presents a unique approach to concept development using rapid prototyping for concept development and scenario-based simulation for concept verification. The rapid prototyping environment, derived from artificial intelligence technology, is based on a blackboard architecture. The rapid prototype simulation capability is provided through an object-oriented modeling environment. It is shown how both simulation and blackboard technologies are used collectively to rapidly gain insight into a tenacious problem. A specific example will be discussed where this approach was used to evolve the logic of a mission controller for an autonomous underwater vehicle.

关键词： Military engineering

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