control gate Articles

  • Free-surface flow simulations for discharge-based operation of hydraulic structure gates

    We combine non-hydrostatic flow simulations of the free surface with a discharge model based on elementary gate flow equations for decision support in the operation of hydraulic structure gates. A water level-based gate control used in most of today's general practice does not take into account the fact that gate operation scenarios producing similar total discharged volumes and similar ...


    By IWA Publishing

  • A novel digital implementation of AC voltage controller for speed control of induction motor

    In this paper, a novel, simple and reliable digital firing scheme has been implemented for speed control of three-phase induction motor using ac voltage controller. The system consists of three-phase supply connected to the three-phase induction motor via three triacs and its control circuit. The ac voltage controller has three modes of operation depending on the shape of supply current. The ...


    By Inderscience Publishers

  • Development of a Passive Operating Scheme for a CSO Capture Tunnel

    ABSTRACTThe Upper Rouge Tunnel (URT) is a proposed seven mile long CSO capture tunnel within the Detroit Water and Sewerage Department (DWSD) combined sewer system that will be filled at drop shafts along its length. During filling, surge waves will result that, if left uncontrolled, could damage structures. Surge control facilities will depend on the operational scheme selected and will be ...

  • FPGA-based neural fuzzy controller design for PMLSM drive

    Based on the technology of field programmable gate array (FPGA), a realisation of fuzzy control (FC) system with radial basis function neural network (RBF NN) tuning is presented to a permanent magnet linear synchronous motor (PMLSM) drive in this paper. Firstly, a mathematic model of the PMLSM drive is defined; then to increase the performance of the PMLSM drive system, an FC constructed by a ...


    By Inderscience Publishers

  • Torque and flux ripple minimisation in direct torque control of induction motor using space vector modulation

    This paper explains the application of Space Vector Modulation (SVM) technique to reduce torque and flux ripple in an induction motor employing Direct Torque Control (DTC). The effective time is determined using imaginary time vector, thereby the lengthy procedure of using reference voltage vector is eliminated, and also the sector identification and angle determination are not used. Simulation ...


    By Inderscience Publishers

  • how to open and clear the resilient seated gate valve

    ( 1 ) , ready to work Selected according to the required specifications ① valve wrench, a screwdriver , crowbar , processed bars, the top wire and other tools. ② prepare appropriate yarn , detergents, according to the valve specifications ready valve seal pads , fillers, lubricants. ( 2 ) ...

  • Automated fuzzy decision and control system for reservoir management

    Traditional approaches to the management of an artificial reservoir involve the use of linear, dynamic, nonlinear or stochastic programming. Hence a purely model-based approach would be extremely difficult and thus, recently, a large number of papers devoted to the solution of reservoir management problems based on fuzzy logic approaches have appeared. In this work, two management problems of a ...


    By IWA Publishing

  • Valves in Water System of Heating Air Condition

    Common valves in water system of heating air condition include gate valve, globe valve and butterfly valve.   Gate vale For its moderate length, rotary adjusting rod and good regulating performance, gate valve is widely utilized in large caliber pipes.   Globe valve Globe valve is suitable for small caliber pipes for its long length, ...

  • Typical process weighing applications

    Process weighing relates to the weighing of a powder material as part of a production process. The technology includes continually monitoring a material in a silo, discharging material by weight or rate, or even weighing products on the move. This article gives an overview of most of the typical process weighing applications that are used in all sorts of industries: level or inventory measuring ...


    By Hardy Process Solutions

  • Comparison of EGR ratios determined by four different methods for electronic re-circulation gate control

    In this study, low pressure systems have been applied for exhaust gas recycling (EGR), which is applied in certain operating conditions. Induction air, exhaust gas flow, amount of exhaust gas added to the induction air, amount of carbon dioxide (CO2) in the exhaust gas, and amount of carbon dioxide in the induction air mixed with the exhaust gas, have been measured and the EGR ratio has ...


    By Inderscience Publishers

  • Industrial Valves: World Markets Report

    Provides continually updated analyses and forecasts of ball, butterfly, plug, globe/gate, automatic regulatory/control and miscellaneous valve types in 80 ...


    By The McIlvaine Company

  • Contribution to a flood situation management: a supervisory control scheme to reduce disaster impact

    Inundations due to river overflows are becoming more frequent; management of flood is thus an important task belonging to the set of preventive measures allowing the protection of people and goods downstream. The flood situation management method proposed in this paper was designed to reduce the flood impact at its early arising stage. The river is supposed to be equipped with reservoirs in ...


    By IWA Publishing

  • Laterally ordered 2-D arrays of Si and Ge nanocrystals within SiO2 thin layers for application in non-volatile memories

    Silicon and germanuim nanocrystal memories show important advantages over conventional floating gate non-volatile memories. To fully exploit these advantages, it is essential to achieve accurate control of nanocrystal size and arial density, as well as accurate positioning of the nanocrystal layer within the gate dielectric. In this paper, a review of work performed at IMEL on the fabrication and ...


    By Inderscience Publishers

  • Bedford flood gate control - Case study

    Bedford Borough Council have been given responsibility for the management and control of 2 flood gates on the Great Ouse in the center of Bedford. OTT Hydrometry were successful in the tender process and were commissioned to install a monitoring solution that can trigger the opening and closing of the existing flood gates at predetermined river levels. In addition to the flood gate control the ...


    By OTT HydroMet

  • Watching over high tide

    Solid provides a reliable and accurate solution for control of sea water level in one of New Zealand's bay reserves. Onehunga Bay Reserve in Auckland, New Zealand, provides its residents with both marine and land facilities. One of them is a recreational sea water pool that serves as a natural pool for swimming and water sports, and a private docking place for small yachts. The ...

  • A comparison between different techniques for water network sectorization

    Water network partitioning represents one of the best methodologies for improving water balance and pressure control of a water distribution system in order to reduce water leakage. These techniques can be applied with greater effectiveness defining a smaller permanent network district, called a District Meter Area (DMA), achieved by the insertion of gate valves and flow meters. If the DMAs are ...


    By IWA Publishing

  • Aquaflow to the rescue case study

    Aquaflow a division of T-T PUMPS Ltd are always prepared to leave their comfort-zone to deliver solutions that exceed expectations! Belle Greve Pumping Station is undergoing an upgrade to prolong its lifespan, work started in 2008 and it is crucial to the island's future sewage management programme. Aquaflow were approached by the principal contractor working on behalf of Guernsey Water, ...


    By T-T Pumps Ltd.

  • South Texas Landfill − Case Study

    During 2011, four QED Precision Fine Tune Control Valves™ were installed in wells at a south Texas landfill. The following graphs show the composition of the landfill gas and flow data before and after the installation of the Control Valves in Wells 07, 54, 78, and 90. The closest neighboring well on the same trunk line, using a gate valve for flow control, was also chosen for an additional ...

  • Exploring the practical issues and use of modern power, control and sensing circuitries of a 6/4-pole switched reluctance motor drive

    This paper explores practical issues and use of modern power, control and sensing circuitries of a 6/4-pole Switched Reluctance Motor (SRM) drive. A DSP-based SRM drive system consists of classic bridge converter including power MOSFETs and their gate drivers, freewheeling diodes, sensing circuit, DSP controller and a SRM that is being controlled by the controller. Few logic components are also ...


    By Inderscience Publishers

  • Boundary feedback control of an open canal with arbitrary cross sections

    This paper deals with the boundary feedback control of an open channel with arbitrary cross sections, which is modelled by the nonlinear Saint-Venant equations. The characteristic form of the Saint-Venant initial-boundary value problem is established in terms of Riemann invariants. In order to develop the boundary feedback control laws for a canal with arbitrary cross sections, the simplest ...


    By Inderscience Publishers

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