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Industry Applications Society Annual Meeting, 1992., Conference Record of the 1992 IEEE

Date 4-9 Oct. 1992

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Displaying Results 1 - 25 of 304
  • PCB regulations and procedures for risk management including PCB cleanup policy and procedures

    Publication Year: 1992, Page(s):2064 - 2071 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (763 KB)

    To regulate the continued use and disposal of PCBs (polychlorinated biphenyls), the US Environmental Protection Agency (USEPA), is charged with enforcing the regulations contained in Title 40 Code of Federal Regulations Part 761 (40 CFR 761). Particularly applicable are the requirements of Subpart G, PCG Cleanup Policy, which became effective on May 4, 1987. The PCB spill cleanup policy is reviewe... View full abstract»

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  • An overview of different designs of water resistant cable

    Publication Year: 1992, Page(s):2060 - 2063 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (285 KB)

    An overview of the most current information on several different constructions and materials that help combat water treeing, a long-term failure mechanism for extruded dielectrics is given. The mechanisms involved in tree formation and in the subsequent deterioration of the insulation material are described. The use of accelerated cable life testing to evaluate different methods of coping with tre... View full abstract»

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  • Automating the rubber compounding process

    Publication Year: 1992, Page(s):2055 - 2059 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (473 KB)

    A project aimed at integrating machine control and process control is discussed. A number of automation objectives are being pursued to achieve this goal are described. The equipment and the process are examined. The system consists of three programmable logic controllers and two personal computers, communicating over a LAN. The system, as assembled, consists of a number of subsystems functioning ... View full abstract»

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  • Transmission line design for detonating exploding bridge wires

    Publication Year: 1992, Page(s):2047 - 2052 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (419 KB)

    A common way to directly initiate explosives is the use of exploding bridge wire devices. A critical factor for detonating a bridge wire is the energy provided from the firing set. The amount of energy transmitted depends mainly on both the firing system and the shooting line parameters. A design procedure that optimizes the firing set parameters so that proper detonation occurs is developed. Tran... View full abstract»

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  • Application of a suspension rope brake to a single rope mine hoisting system

    Publication Year: 1992, Page(s):2041 - 2046 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (684 KB)

    The author discusses the application of counterweight safeties, electrical dynamic braking, and a pneumatic rope brake system to single-rope mine hoists. He considers the control, design, and testing of a suspension rope brake applied to a single-rope mine hoist. The rope brake grips the suspension ropes and stops the hoist if an overspeed of 15% is detected of if the cage moves away from the land... View full abstract»

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  • Automated rock dusting controllers

    Publication Year: 1992, Page(s):2034 - 2040 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (498 KB)

    The development of a device to detect a hazardous coal dust layer and automatically start rock-dusting concentrations to render the coal layer nonflammable is discussed. The controller makes use of a float dust deposition meter (FDDM) for measuring the thickness of deposited dust. The research consisted of three phases. In the first phase, the process was modeled using Monte Carlo methods and prev... View full abstract»

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  • Fault monitoring and diagnosis in mining equipment: current and future developments

    Publication Year: 1992, Page(s):2026 - 2033 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (856 KB)

    The authors survey monitoring and diagnosis technologies which offer opportunities for improving equipment availability in mining. They briefly present a framework for comparing and contrasting different techniques, and examine the application of expert systems and knowledge-based methods to mining applications. Model-based methods are discussed from the viewpoint of both analytical models and qua... View full abstract»

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  • A computerised sensor based diagnostic maintenance system for continuous mining machine hydraulics

    Publication Year: 1992, Page(s):2020 - 2025 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (501 KB)

    The US Bureau of Mines has developed an expert knowledge based system to diagnose hydraulic problems on the Bureau's testbed Joy 16CM continuous mining machine. The author describes this computerised, sensor-based diagnostic maintenance tool and its components. The diagnostic system is interfaced to machine-based sensors which monitor various hydraulic system parameters, such as pressures, flows, ... View full abstract»

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  • Computer vision applications in mineral processing research

    Publication Year: 1992, Page(s):2013 - 2019 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (742 KB)

    The authors describe the successful application of computer vision technology in four research projects at the Tuscaloosa Research Center. One project is directed at quantitative determination of the amount of the mineral apatite in phosphate tailings following flotation. A second project uses the camera as a color sensor, or colorimeter, for estimating chemical composition of solutions. Two other... View full abstract»

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  • Electric annealing of copper and brass strip

    Publication Year: 1992, Page(s):2007 - 2010 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    The author discusses an innovative control strategy which evolved from the need to simplify operator control of continuous electric annealing apparatus. He points out problems encountered during the transition from experimental apparatus to production line, which was neither a simple nor was it a smooth, straightforward transition. The prototype, like the laboratory demonstration, was to be contro... View full abstract»

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  • Control system to improve tin plate primary yield

    Publication Year: 1992, Page(s):2003 - 2006 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (289 KB)

    The authors detail modifications made in the control scheme for two separate tin lines which increased yield by improving quality for a relatively small investment. They deal with control modifications made to the helper sections (drives for turning, deflector rolls, conductor rolls, sink rolls, etc.) to reduce scratches and increase prime tin plate yield while keeping cost to a minimum. In genera... View full abstract»

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  • A high performance edge heater for the hot strip mill

    Publication Year: 1992, Page(s):1998 - 2002 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (431 KB)

    A transverse magnetic flux type of induction edge heater for the hot strip mill which can heat the edge portion of a transfer bar from the heat end to the tail end was developed. The edge heating system consists of a single magnetic circuit. An algorithm for setting the optimum air gap between the upper and lower inductors and firing-angle compensation circuit were developed. This circuit enables ... View full abstract»

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  • Computerized AGC systems based on the constant volume flow equation

    Publication Year: 1992, Page(s):1992 - 1997 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (478 KB)

    An automatic gauge control (AGC) system that calculates the thickness of a strip, as it leaves the roll gap, from its entry speed, exit speed, and entry thickness is presented. The calculation is based on the constant volume flow (CVF) equation applied to the roll gap, so that the outgoing thickness can be calculated if the incoming thickness is known. The calculated thickness in the roll gap is u... View full abstract»

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  • The application of adjustable frequency drives to electric overhead cranes

    Publication Year: 1992, Page(s):1986 - 1991 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (501 KB)

    The application of a pulse width modulation (PWM) adjustable frequency (AF) inverter drive, SMARTORQUE that was made to satisfy the special requirements of cranes, hoists, and other material handling equipment is discussed. The requirements that a motor control system must satisfy to be suitable for any crane and hoist applications with regard to load handling ability, thermal capacity, maintainab... View full abstract»

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  • Increasing UPS and computer reliability in large installations

    Publication Year: 1992, Page(s):1981 - 1985 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    The author examines different uninterruptible power system configurations to determine the most reliable system for a reasonable cost. Series and parallel configurations are examined with respect to their true reliability in realistic installations. Module simplification and redundancy are examined and appear to give reliability improvements over some configurations. Component simplification offer... View full abstract»

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  • Mill building grounding system retrofit

    Publication Year: 1992, Page(s):1978 - 1980 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    The author discusses an approach to retrofitting a new electrical grounding system to an existing industrial building when confidence has been lost in the integrity of the original system. He points out the near impossibility of measuring the resistance of a large grounding grid. The solution to this problem is described.<> View full abstract»

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  • Offline 1774 PLC reliability case study

    Publication Year: 1992, Page(s):1969 - 1977 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (499 KB)

    A reliability study was made of a 1774 PLC used in an ingot plant's offline area to monitor and control material handling from the hot mill scalpers as well as the finishing-to-ingot-scrap-chip system. The study was prompted by a series of rampant failures. The author discusses the factors that led to the problems as well as the decisions resulting from the data analysis. Also included are informa... View full abstract»

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  • A comparison of industrial communications networks

    Publication Year: 1992, Page(s):1960 - 1968 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (821 KB)

    The factors that a local area network (LAN), namely, topology, transmission medium, network access method, and transmission technology, are discussed. Several industrial communication standards are outlined. The type of network best suited for different control applications is identified.<> View full abstract»

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  • Why should the steel industry do anything with their PCB transformers?

    Publication Year: 1992, Page(s):1955 - 1959 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (475 KB)

    The EPA regulations force owners of PCB (polychlorinated biphenyl) equipment that includes transformers and capacitors to carefully review regulatory compliance and develop PCB risk management programs. The author briefly reviews the EPA regulations, highlighting the more commonly violated requirements. Several risk management techniques are presented and discussed. A method of quantifying the cos... View full abstract»

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  • An integrated vehicle and electromagnetic propulsion unit for a high-speed material transport system

    Publication Year: 1992, Page(s):1945 - 1952 vol.2
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (896 KB)

    The concept of a high-speed, high-acceleration, material transport system based on distributed linear induction motors, power conversion and controllers interconnected via a high-speed communication network is proposed for flexible manufacturing systems. The authors focus on one aspect of the proposed transport system, the integrated electromagnetic propulsion unit, and highlight the associated ke... View full abstract»

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  • Use of neural networks to identify and compensate for friction in precision, position controlled mechanisms

    Publication Year: 1992, Page(s):1937 - 1944 vol.2
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (714 KB)

    A special neural network topology has been developed that compensates for friction in precision, position controlled mechanisms. A major contribution is that knowledge of the friction's form is used to determine the neural network's structure. This unique approach solves network sizing and weight initializing problems. The friction model is used for feedforward decoupling of friction-induced torqu... View full abstract»

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  • A dynamic model for the electrical characteristics of fluorescent lamps

    Publication Year: 1992, Page(s):1928 - 1934 vol.2
    Cited by:  Papers (67)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    A model for the electrical behavior of fluorescent lamps at standard line frequency (50 Hz or 60 Hz) and at high frequency (20 kHz-50 kHz). The model is based on the following three relationships: the lamp's V-I characteristic at high frequency; the lamp's DC V-I characteristic; and the dynamic relationship between these two modes of operation. The first two are readily measured using simple lab s... View full abstract»

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  • Validation of daylight calculation for an anisotropic diffuse reflecting interior of arbitrary geometry under any sky conditions

    Publication Year: 1992, Page(s):1920 - 1927 vol.2
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (898 KB)

    A method of luminance calculation for an anisotropic diffuse reflecting interior is applied to daylight calculation. It can be used for any sky condition, interior geometry, and reflecting property of the interior surface. The shape of the interior space is described by a composition of polygonal elements. The reflecting property of interior surfaces can be specular, semispecular, or diffuse. The ... View full abstract»

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  • Reliability of electronic ballasts in industrial fluorescent lighting applications

    Publication Year: 1992, Page(s):1915 - 1919 vol.2
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (441 KB)

    The premature failure of electronic ballasts installed in industrial sites was investigated. The objective was to locate the specific causes so that manufacturers can redesign the ballasts for higher reliability. Conditions of the site where the ballasts were installed and the types of components that failed were examined. The main reasons for failure were abnormal voltage rises, both steady and t... View full abstract»

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  • Ballast curves for HPS lamps operating on high frequency

    Publication Year: 1992, Page(s):1908 - 1914 vol.2
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    The author presents a simple method for designing ballast curves for high pressure sodium (HPS) lamps operating at a frequency >20 kHz. Since the HPS lamp is a complicated plasma device, an approximation can be useful. An approximate model based on a resistive substitution of HPS lamps operating at a high frequency is introduced and used to transform the problem of ballast design to a treatable el... View full abstract»

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