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4th International Conference on Knowledge-Based Intelligent Engineering systems and Allied Technologies, KES 2000

作者： Chen, Peng Toyota, Toshio Taniguchi, Masatoshi Feng, Fang Hiho, Tomoya Faculty of Computer Science and System Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka-shi Fukuoka-ken Japan

ISBN: (纸本)0780364007

s: This paper proposes a failure diagnosis method for machinery in unsteady operating condition using instantaneous power spectrum (IPS) and Genetic Programming (GP). The IPS is used to extract feature frequency of each machine state from measured vibration signal for distinguishing failures by the Relative Crossing Information (RCI). Excellent symptom parameters for detecting failures are automatically generated by GP. The method proposed in this paper is verified by applying it to the failure diagnosis of rolling bearing. © 2000 IEEE

关键词： Outages

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Extraction of feature spectra by instantaneous power spectrum and automatic generation of symptom parameters by GP for diagnosis of machinery in unsteady operating condition

Extraction of feature spectra by instantaneous power spectru...

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作者： Taniguchi, Msatoshi Chen, Peng Toyota, Toshio Faculty of Computer Science and System Engineering Kyushu Institute of Technology 680-4 Kawazu Iizuka-shi Fukuoka-ken Japan

This paper proposes a failure diagnosis method for plant machinery in unsteady operating condition using instantaneous power spectrum (IPS) and Genetic Programming (GP). The IPS is used to extract feature spectra of each machine state from measured vibration signal for distinguishing failures by the Relative Crossing Information (RCI). Excellent symptom parameters for detecting failures are automatically generated by GP. The methods proposed in this paper are verified by applying them to the fai/ure diagnosis of rolling bearing. © 2000 IEEE.

关键词： Data mining

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Operation Supporting system of Tools in Virtual World

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Journal of Robotics and Mechatronics 2000年第1期12卷 11-17页

作者： Annoura, Kazuhiro Abe, Norihiro Tanaka, Kazuaki Taki, Hirokazu Department of Mechanical System Engineering Faculty of Computer Science and System Engineering Kyushu Institute of Technology Japan Faculty of System Engineering Wakayama University Japan

Because tools in real world operate the object in order to attain a specific purpose, it is possible to forecast the movement to some extent. So action of hands to operate the tool to attain a purpose is measured beforehand and the data are stored in computer classified by the purpose. When operating the tool with virtual hand in virtual space, in the case that the system detects that the user is going to perform the operation defined for the tool, playback of the movement of the hand stored in the system enables the user to get operation feeling with more delicate reality. © 2000, Fuji technology Press. All rights reserved.

关键词： Virtual reality

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Failure diagnosis method for machinery in unsteady operating condition by instantaneous power spectrum and genetic programming

Failure diagnosis method for machinery in unsteady operating...

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International Conference on Knowledge-Based Intelligent Information Engineering systems (KES)

作者： Peng Chen T. Toyota M. Taniguchi Fang Feng T. Hiho Faculty of Computer Science and System Engineering Kyushu Institute of Technology Fukuoka Japan

The paper proposes a failure diagnosis method for machinery in unsteady operating condition using instantaneous power spectrum (IPS) and genetic programming (GP). The IPS is used to extract feature frequency of each machine state from measured vibration signal for distinguishing failures by the Relative Crossing Information (RCI). Excellent symptom parameters for detecting failures are automatically generated by GP. The method proposed in the paper is verified by applying it to the failure diagnosis of rolling bearing.

关键词： Machinery Genetic programming Vibration measurement Data mining Feature extraction Time measurement systems engineering and theory Frequency measurement Frequency domain analysis computer science

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Cellular neural networks considering hysteresis characteristic

Cellular neural networks considering hysteresis characterist...

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IEEE Asia-Pacific Conference on Circuits and systems

作者： M. Namba H. Kawabata A. Kanagawa Z. Zhang Faculty of computer science and system engineering Okayama Prefectural University Okayama Japan Industrial Technology Center of Okayama Okayama Japan

The Cellular Neural Network (CNN) has been widely used for associative memory, but has a problem called indeterminate cell. In this paper, we have proposed a CNN considering hysteresis characteristic as one of the met... 详细信息

ISBN: (纸本)0780362535

关键词： Cellular neural networks Hysteresis computer science systems engineering and theory computer industry Associative memory Circuit simulation Analog circuits Differential equations Programmable control

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InterRobot: a speech driven embodied interaction robot

InterRobot: a speech driven embodied interaction robot

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IEEE International Workshop on Robot and Human Communication (ROMAN)

作者： H. Ogawa T. Watanabe Faculty of Computer Science and System Engineering Okayama Prefectural University Soja Okayama Japan Japan Science and Technology Corporation Japan

The concept of a speech driven embodied interaction robots system is introduced for supporting human interaction by generating the expressive actions or motions of robots coherently related to speech input. Then, the prototype of the system which consists of 2 interaction robots called InterRobots with both functions of speaker and listener is developed in which two models are incorporated: one is a listener's action model in which nodding, blinking and the motions of head, arms and body are estimated by the hierarchical moving average (MA) model of the burst-pause (ON-OFF) of speech to the nodding; the other is a speaker's action model in which the motions of head, arms and body are estimated by its own MA model of the ON-OFF of speech to the head motion. By the sensory evaluation and behavioral analysis in human-robot interaction, the effectiveness of InterRobot's interaction is demonstrated. The effectiveness of the embodied interaction robots system is also confirmed in remote communication.

关键词： Human robot interaction Biological system modeling Robot sensing systems Motion estimation Face computer graphics computer science systems engineering and theory Speech analysis Computational modeling

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A speech driven embodied interaction robots system for human communication support

A speech driven embodied interaction robots system for human...

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IEEE International Conference on systems, Man and Cybernetics

作者： T. Watanabe M. Okubo H. Ogawa Faculty of Computer Science and System Engineering Okayama Prefectural University Okayama Japan CREST Japan Science and Technology Corporation Japan

The concept of a speech driven embodied interaction robots system is introduced for supporting human interaction by generating the expressive actions or motions of robots coherently related to speech input. The prototype of the system which consists of 2 interaction robots called InterRobots with both functions of speaker and listener is developed in which two models are incorporated: one is a listener's action model where nodding, blinking and the motions of head, arms and body are estimated by the hierarchical MA (moving-average) model of the burst-pause (ON-OFF) of speech to the nodding; the other is a speaker's action model in which the motions of head, arms and body are estimated by its own MA model of the ON-OFF of speech to the head motion. By sensory evaluation and behavioral analysis in human-robot interaction, the effectiveness of InterRobot's interaction is demonstrated. The effectiveness of the embodied interaction robot system is also confirmed in remote communication.

关键词： Speech Human robot interaction Biological system modeling Robot sensing systems Arm Motion estimation Prototypes computer graphics computer science systems engineering and theory

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Evaluation of an embodied virtual communication system for human interaction analysis by synthesis

Evaluation of an embodied virtual communication system for h...

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IEEE International Workshop on Robot and Human Communication (ROMAN)

作者： Y. Ishii T. Watanabe Faculty of Computer Science and System Engineering Okayama Prefectural University Soja Okayama Japan CREST Japan Science and Technology Agency Japan

An embodied virtual face-to-face communication system with two types of avatars for human interaction analysis by synthesis is developed: one is a VirtualActor (VA) as a human avatar which represents interactive behavior such as the motions of head, arms and body, the other is a VirtualWave (VW) as an abstract avatar in which human behavior is simplified as the motion of wave to clarify an essential role of interaction. The system provides networked virtual communication environment in which two remote talkers can share embodied interaction through their VA or VW including themselves in the same virtual space. The effectiveness of the system is demonstrated by the sensory evaluation and behavioral analysis of the communication experiment in 13 pairs of 26 talkers under various conditions such as the time lag of motion and voice. The importance of mutual embodied sharing in communication is also clarified The system would be expected to form the foundation of information media and communication technologies as well as the methodology for the analysis and understanding of various human interactions.

关键词： Humans Avatars Face Motion analysis Control system synthesis computer science systems engineering and theory Arm Speech analysis Information analysis

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Performance studies in broadcast and select WDM system

Performance studies in broadcast and select WDM system

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IEEE Region 10 International Conference TENCON

作者： R.W. Yousif B.M. Ali Limkokwing Institute of Creative Technology Petaling Jaya Malaysia Computer & Communications System Department Faculty of Electrical Engineering Universiti Putra Malaysia Malaysia

We study multicast traffic performance in single-hop optical networks based on broadcast and select system that employ a receiver collision avoidance protocol (RCA) as a multicasting protocol. We use an approximate analytical solution and Markov model to analyse the system. We consider fixed and uniform distribution of the destination set size to show the relationship between the receiver throughput and system throughput against the multicast size of the destination. We also show the trade-off between the offered load and channel probability. Then we evaluate the system as a relationship between blocking probability and offered load.

关键词： Wavelength division multiplexing Optical receivers Optical transmitters Optical fiber networks Optical buffering Radio broadcasting Optical filters Multicast protocols Telecommunication traffic Bandwidth

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Impulse Response Model Identification in the Case of a Multi-Period ZOH Input

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IFAC Proceedings Volumes 2000年第15期33卷 295-300页

作者： Zi-Jiang Yang Yoshihiro Kodama Faculty of Computer Engineering and System Science Kyushu Institute of Technology Iizuka Fukuoka 820-8502 Japan TEL+81-948-29-7672 FAX+81-948-29-7651

This paper considers the problem of impulse response identification for a linear sampled-data system where the input signal is held constantly within a multiple of the sampling period of the output signal. To improve identification accuracy, this paper proposes a new identification approach by employing the Haar scaling and wavelet functions. At first, we point out that the discrete-time impulse response of a linear system with zero-order hold (ZOH) input is actually the piecewise-constant approximation of the continuous-time impulse response. Based on the close relation between piecewise-constant approximation with Haar scaling and wavelet functions, a hierarchical identification procedure is proposed which identifies the system impulse response from a coarse resolution level to a fine resolution level successively. At each resolution level, the BIC is utilized to determine the length of the decomposed impulse response in the corresponding subspace, so that some redundant parameters in the high frequency-domain which are sensitive to the noise effects are discarded. Since the identified impulse response model is not smooth when it is represented by some Haar scaling functions of different widths, we can replace each Haar scaling function in the preidentified impulse response model by a Gaussian basis function with corresponding position and width. Then an improved identification method is also proposed to achieve smooth continuous-time impulse response model from sampled data. It is shown through simulation study that the proposed methods yield accurate estimate of the impulse response even in the ill-conditioned cases.

关键词： identification impulse response ill-conditioned problem multiresolution analysis Haar wavelet multirate sampling

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