Conference Paper

In search for common ground: how an automatic turbine system supports operator work.

DOI: 10.1145/1473018.1473039 Conference: ECCE 2008 - The Ergonomics of Cool Interaction, European Conference on Cognitive Ergonomics 2008, Funchal, Madeira, Portugal, September 16-19, 2008
Source: DBLP

ABSTRACT

Motivation -- The use of automation technology tends to steadily increase in a wide range of applications. With this comes a demand to design systems that support team play among human operators and automation to avoid problems related to monitoring work. Research approach -- The study was performed as a field study using semi-structured interviews and observations. Findings/Design -- The initial interview and observation results indicate that generally accepted research in the field of human-automation interaction is valid in the studied nuclear power control room context. The work shows the benefit of studying human joint activity to improve interface design that supports human-automation collaboration. Take away message -- Further research in the area of human-automation cooperation in control rooms is needed. A possible way for development of a design basis is to examine human-human cooperation and extract useable design guidelines.

0 Followers
 · 
1 Read
  • [Show abstract] [Hide abstract]
    ABSTRACT: High performance voltage and current-source inverters (VSI and CSI) are widely required in various industrial applications such as servo-motor drives, special power supplies, distributed power systems and hybrid electric vehicles. However, the traditional VSI and CSI have been seriously restricted due to their narrow obtainable output voltage range, short-through problems caused by misgating and some other theoretical difficulties due to their bridge-type structures. The Z-source inverter was proposed to overcome the problems associated with the traditional inverters, in which the functions of the traditional dc-dc boost converter and the bridge-type inverter have been successfully combined. To further widen the operational range or gain of the Z-source inverter in both the voltage and current type configurations, the generalized switched-inductor and switched-capacitor impedance networks are proposed hereon. Both simulation and experimental testing have been conducted for validating the extra boosting introduced with some representative results captured and presented near the end of the paper.
    No preview · Article · Jan 2010 · IEEE Transactions on Power Electronics
  • [Show abstract] [Hide abstract]
    ABSTRACT: This paper presents several nonisolated semi-Z-source inverters for a single-phase photovoltaic (PV) system with low cost and doubly grounded features. These semi-Z-source inverters employ the Z-source/quasi-Z-source network and only two active switches to achieve the same output voltage as the traditional voltage-fed full-bridge inverter does. The two active switches of the semi-Z-source inverter are controlled complementarily. Different from the traditional single-phase Z-source/quasi-Z-source inverter, shoot-through zero state is not applicable to the semi-Z-source inverter. The input dc source and the output ac voltage of the semi-Z-source inverter share the same ground, thus leading to less leakage ground current advantages over other nondoubly grounded inverters, such as voltage-fed full-bridge inverter. This is a preferred feature for nonisolated grid-connected inverters, especially in PV application. A revised nonlinear sinusoid pulse width modulation method for a semi-Z-source inverter is also proposed. By using this method, desired duty cycle can be generated to output the sinusoidal voltage. Other dc–dc converters with similar voltage gain curve, which can also be used as a single-phase inverter, are also discussed and summarized. A single-phase semi-Z-source inverter prototype is built; experimental results are provided to verify and demonstrate the special features of the proposed circuit.
    No preview · Article · Dec 2011 · IEEE Transactions on Power Electronics
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Inverters with high-output voltage gain usually face the problem of high-input current flowing through their components. The problem might further be exaggerated if the inverters use high-frequency magnetic devices like transformers or coupled inductors. Leakage inductances of these devices must strictly be small to prevent overvoltages caused by switching of their winding currents. To avoid these related problems, cascaded trans-Z-source inverters are proposed. They use multiple magnetic cells in an alternately cascading pattern rather than a single magnetic cell with large turns ratio. Simulation and experimental results have shown that the multicell inverters can produce the same high-voltage gain, while keeping currents and voltages of the components low. The inverters can also step down their output voltages like a traditional voltage-source inverter without compromising waveform quality.
    Full-text · Article · Feb 2013 · IEEE Transactions on Power Electronics
Show more