Industrial Electronics Society, 1990. IECON '90., 16th Annual Conference of IEEE

27-30 Nov. 1990

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  • Prototyping a discrete systems control for faster debugging and implementation

    Publication Year: 1990, Page(s):694 - 699 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (520 KB)

    The authors describe a set of concepts which cooperate to allow a discrete-system control fast description, and the associated method for real-time prototyping. One of these concepts is the IEC Standard 848 Preparation of Function Charts for Control Charts for Control Systems. Other concepts allow resource sharing, physical controlled system modeling, and interface between control and physical pro... View full abstract»

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  • A tutorial on multisensor integration and fusion

    Publication Year: 1990, Page(s):707 - 722 vol.1
    Cited by:  Papers (28)  |  Patents (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1938 KB)

    A tutorial introduction to the subject of multisensor integration and fusion is presented. The role of multisensor integration and fusion in the operation of intelligent systems is defined in terms of the unique type of information multiple sensors can provide. Multisensor integration is discussed in terms of basic integration functions and multisensor fusion in terms of the different levels at wh... View full abstract»

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  • A low energy drive for high power 300 A-1000 V IGBT

    Publication Year: 1990, Page(s):1090 - 1099 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (355 KB)

    A new concept for the IGBT (insulated gate bipolar transistor) drive circuit is described. This driver requires few components and draws little power. It is totally insulated, making it very interesting for building inverter legs. The driver performs well over the 50 Hz to 500 kHz range (more than is needed for IGBT-based power converters). Bistable operation allows for a very small pulse transfor... View full abstract»

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  • IECON '90. 16th Annual Conference of IEEE Industrial Electronics Society (Cat. No.90CH2841-5)

    Publication Year: 1990
    Request permission for commercial reuse | PDF file iconPDF (193 KB)
    Freely Available from IEEE
  • Coupling an expert system with industrial real-time processes

    Publication Year: 1990, Page(s):1281 - 1286 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (468 KB)

    A diagnostic real-time expert system, applied to an industrial chemical process, is used as a testbed for research on integration of symbolic and numeric computations in a unified framework. The algorithms reveal the precise role and desirable characteristics of synergism between statistical process control and the expert system. Inferencing on the process performance is founded on the consistent ... View full abstract»

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  • New digital signal processing approach to the design of the algorithms for frequency deviation measurement

    Publication Year: 1990, Page(s):17 - 22 vol.1
    Cited by:  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    A novel approach to the design of frequency deviation measurement algorithms is defined. This approach is based on a signal processing scheme that uses quadratic forms of signal samples. The approach is general, and methods to use it as a design tool for developing new algorithms are presented. The performance of an algorithm developed to illustrate the design approach is evaluated using computer ... View full abstract»

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  • Colour vision for industrial applications

    Publication Year: 1990, Page(s):548 - 551 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    A vision system for color object recognition is presented. The proposed system is low in cost and sufficiently fast and reliable for simple industrial applications. The system comprises a fiber-optic illumination system, lenses, camera, frame grabber and IBM PC/AT microcomputer with a color monitor. The recognition algorithms are based on RGB and HSI modes. The approach and development of these al... View full abstract»

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  • CAD-exchange-towards a first step implementation

    Publication Year: 1990, Page(s):734 - 739 vol.1
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB)

    A joint European project, CAD geometry data exchange (CADEX), which deals with the CAD-exchange domain of computer-integrated manufacturing (CIM), is discussed. The CIM context is outlined, and alternative integration strategies are discussed. The selected solution, STEP (standard for the exchange of product model data) neutral file, is discussed in detail. The implementation implications and proj... View full abstract»

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  • MERLIN-a factory product forecasting expert system

    Publication Year: 1990, Page(s):1275 - 1280 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (356 KB)

    MERLIN is a system for forecasting a factory's product demand. The system analyzes and predicts a year-out forecast for over 500 products and product options in about an hour at a Hewlett Packard automated factory. This task previously required many days of effort by two forecasters. Because MERLIN contains embedded knowledge bases, it can make predictions using the latest reasoning process of the... View full abstract»

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  • Increased throughput for process chromatography using constrained deconvolution

    Publication Year: 1990, Page(s):11 - 16 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB)

    Signal restoration using Jansson's method of constrained deconvolution was investigated and tested to deconvolve and thereby resolve severely overlapped gas chromatographic peaks. The results of this technique were compared to what can be obtained with an instrument that uses a longer column that already produces fully resolved peaks. Jansson's deconvolution method enables significant resolution i... View full abstract»

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  • Minimal UPS structure with sliding mode control and adaptive hysteresis band

    Publication Year: 1990, Page(s):1063 - 1067 vol.2
    Cited by:  Papers (14)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    The application of a sliding control mode based on a variable structure system (VSS) for an uninterruptable power supply (UPS) is presented. The incorporation of adaptive control facilitates converter operation within a constant commutation frequency, adding an implicit harmonic control to the intrinsic voltage regulation capacity of the VSS systems. The converter is characterized by online genera... View full abstract»

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  • A Petri net based single chip programmable controller for distributed local controls

    Publication Year: 1990, Page(s):542 - 547 vol.1
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    A low-cost flexible and efficient programmable logic controller is described. Its hardware is based on a monochip controller, resulting in a low-cost realization, and its software is based on a formal specification tool using interpreted Petri nets and a real-time interpreter. Using such a method, it is possible to validate a specification before its implementation, to implement an application wit... View full abstract»

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  • ROPES: a tool for generating robot plans

    Publication Year: 1990, Page(s):210 - 215 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (656 KB)

    The problem of generating plans to be carried out by robots is considered. A tool called ROPES (robot plan generating system) is proposed. The tool is based on modeling STRIPS-like rules by a special type of Petri nets called predicate/transition nets. Analysis techniques of predicate/transition nets are utilized to generate robot plans. The research results indicate that ROPES provides a domain-i... View full abstract»

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  • New digital simulation technique for a current-source inverter fed synchronous motor. I

    Publication Year: 1990, Page(s):1007 - 1012 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    The naturally commutated current-fed synchronous motor has attained a major part in various industrial applications as a variable speed drive because of its simplicity and improved dynamic behavior. The commutation in the inverter bridge by using the induced back EMF of the armature windings, and therefore no forced commutation devices are required, which leads to lower costs. An accurate digital ... View full abstract»

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  • Neural network based self-tuning PID controller with Fourier transformation of temporal patterns

    Publication Year: 1990, Page(s):1227 - 1232 vol.2
    Cited by:  Papers (4)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    A neural autotuner for PID controllers that is relevant for real-time applications is presented. The neural autotuner, in an adaptive PID control scheme, processes temporal patterns (the responses of closed-loop relay feedback in the controlled system) in real time and produces updated parameters for the PID controller. Numerical experiments were carried out to test the training and generalization... View full abstract»

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  • Local CIM system

    Publication Year: 1990, Page(s):729 - 733 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    A small or local computer-integrated manufacturing (CIM) system that makes products in a shorter time and with small inventory was implemented. With this experience, a local CIM software package was developed for OMRON factories, and there are now 21 local CIM systems in the OMRON group. The hardware and software of local CIM systems are described View full abstract»

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  • Evolutionary system identification and control

    Publication Year: 1990, Page(s):1271 - 1274 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    Evolutionary optimization is proposed as a method for machine learning. Simulating evolution can be used for the prediction, identification, and control of time-varying plants. Models which describe the input-output characteristics of the system are evolved in fast time. This evolutionary programming can address systems in which there is little or no prior knowledge. There is no requirement for us... View full abstract»

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  • Development of a well-structured industrial vision system

    Publication Year: 1990, Page(s):501 - 506 vol.1
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (540 KB)

    A well-structured high-speed industrial vision system that emphasizes modularization of fundamental image processors compatible with the standard VME-bus, software realization of application-dependent algorithms, and a pipelined architecture using extra vision buses has been realized. The hardware modules are a binary image projection processor, a general-purpose image processor using a high-speed... View full abstract»

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  • Some implementation aspects of line current reconstruction in three phase PWM inverters

    Publication Year: 1990, Page(s):1149 - 1154 vol.2
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    A method of motor current reconstruction that can be applied with all pulsewidth-modulation (PWM) schemes is discussed. The method is well suited to implementation with digital signal processors (DSPs) or application specific integrated circuits (ASICs). It is based on system variable identification by means of the least-squares method. It is shown that a sinusoidal current waveform of known frequ... View full abstract»

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  • Signal processing techniques for improved resolver-to-digital conversion accuracy

    Publication Year: 1990, Page(s):6 - 10 vol.1
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    Several methods for reducing the position error caused by the existence of nonideal resolver signal characteristics are introduced. The most straightforward method is to calibrate each resolver and resolver-to-digital (R/D) converter and then correct the R/D converter output in real time. While this method corrects all errors, including those with an origin in the R/D converter, it is also the mos... View full abstract»

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  • Prediction based DC servo control system in robotic arm

    Publication Year: 1990, Page(s):294 - 299 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (300 KB)

    Two approaches to the accurate trajectory control of a robotic arm with payload are presented. One is the fixed parameter algorithm and the other is the self-tuning algorithm. Both methods use an ARMA (autoregressive moving average) process model. In the first method the model is fixed and in the second the model parameters are tuned online. These techniques are based on long-range position predic... View full abstract»

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  • Three-phase 200 kVA UPS with IGBT consisting of high power factor converter and instantaneous waveform controlled HF PWM inverter

    Publication Year: 1990, Page(s):1057 - 1062 vol.2
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (632 KB)

    A description is given of a three-phase 200 kVA UPS (uninterruptible power supply). In this UPS, both the input converter section and the output inverter section utilize an IGBT (insulated gate bipolar transistor) as a main semiconductor switching device. Compared with the conventional type of UPS using bipolar junction transistors, this UPS provides an equivalent efficiency in spite of having an ... View full abstract»

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  • Event driven bus architecture for bounded area networks

    Publication Year: 1990, Page(s):539 - 541 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    A communication architecture for bounded area networks (BANs) is proposed. BANs are communication networks that exist in robots, vehicles, homes, etc. They are characterized by a limited number of stations because of the application, restricted geographic distances, and high reliability requirements. They also differ from local area networks in the higher layers. The architecture of this solution ... View full abstract»

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  • Adaptive control to minimize shock in bang/bang systems

    Publication Year: 1990, Page(s):204 - 209 vol.1
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (456 KB)

    An adaptive bang-bang control framework for reduction of shock in industrial manipulators is presented. On/off control is replaced by adaptive on/off control to introduce damping of system dynamics. The approach is especially useful in situations where equipment is being controlled by logic controllers. The methods presented can be implemented without modification to existing on/off control progra... View full abstract»

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  • LQG/LTR control system design for a low-pressure feedwater heater train with time delay

    Publication Year: 1990, Page(s):160 - 164 vol.1
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    An LQG/LTR control system design is formulated for a nuclear reactor feedwater heater train with output time delay. This approach involves factoring the feedwater heater train plant into nonminimum and minimum-phase components to allow the design of a robust controller for the minimum-phase component of the plant using the LQG/LTR technique. The nonminimum phase component takes the form of an all-... View full abstract»

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