TENCON '98. 1998 IEEE Region 10 International Conference on Global Connectivity in Energy, Computer, Communication and Control

17-19 Dec. 1998

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  • IEEE Region 10 International Conference on Global Connectivity in Energy, Computer, Communication and Control [front matter]

    Publication Year: 1998, Page(s):i - xvii
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    Freely Available from IEEE
  • Sir J.C. Bose revisited [MM wave research]

    Publication Year: 1998, Page(s):291 - 294 vol.2
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (404 KB)

    The presentation of the work of Sir. J.C. Bose (1895, 1896, 1897, 1927) to the scientific community has resulted in a plethora of newspaper articles which claimed that perhaps the western scientific world of Lords Rayleigh and Kelvin which created Bose, attempted to deprive him of his Noble Prize for his work on electromagnetic phenomena which were carried out at the same time as that of Marconi. ... View full abstract»

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  • Millimeter waves and Gaussian beams in modern communication

    Publication Year: 1998, Page(s):627 - 629 vol.2
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (173 KB)

    Summary form only given. Remarkable pioneering experimental work in millimeter-wave techniques was done by Sir Jagadis Chandra Bose in Calcutta in the 1890s. He developed and used many of the microwave and millimeter wave quasi-optical components that are in use today, including waveguides, horn antennas, dielectric lenses, prisms and wave polarizers, and made the first experimental demonstration ... View full abstract»

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  • A new fixed-frequency zero-voltage switched low-cost single phase high quality rectifier circuits with minimum voltage stress across the switches

    Publication Year: 1998, Page(s):406 - 409 vol.2
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (264 KB)

    This paper presents a new family of circuits for single phase diode bridge rectifiers capable of drawing approximately sinusoidal current at unity power factor with high efficiency and minimum voltage stress across the switches. They can work as either boost or flyback converters. The circuits consist of a single-phase diode bridge rectifier, followed by a boost stage containing two switches-the m... View full abstract»

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  • Analysis of force producers in hemispherical stepper motor

    Publication Year: 1998, Page(s):402 - 405 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (268 KB)

    An arm can spin in a conical space through a ball-socket system. The extension of the arm increases the height of the cone and the area of its base. In this the mover cannot perpendicularly approach the surface of a 3-D object, if the socket is not moved by further additional motors and corresponding arms. In such a system an end-effector cannot effectively operate over a curved surface/3-D object... View full abstract»

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  • A new DC-to-AC inverter with dynamic robust performance

    Publication Year: 1998, Page(s):387 - 390 vol.2
    Cited by:  Papers (1)  |  Patents (25)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (208 KB)

    In this paper a new bidirectional inverter with nonlinear robust controller is presented to improve the circuit performance. In the control strategy, the output voltage is fedback and the input voltage and the inductor voltage are feedforwarded and combined in a special nonlinear way. As a result the output voltage remains dynamically robust when the input voltage and output current have large dis... View full abstract»

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  • A direct analog-to-residue converter

    Publication Year: 1998, Page(s):336 - 339 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (368 KB)

    The design of residue converters is an important area of research among RNS based systems. Currently, an analog signal is first converted into binary and then to residue using a binary-to-residue converter. To overcome the inefficiencies due to this two step process, two novel approaches for the design of a direct analog-to-residue (A/R) converter are presented. They are based on the successive ap... View full abstract»

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  • Bilinear model based fuzzy control of a DC-DC converter

    Publication Year: 1998, Page(s):383 - 386 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (304 KB)

    The paper develops a bilinear perturbation fuzzy model of a DC-DC converter. A methodology for developing the discrete-time bilinear model around a nominal operating point is presented first. The multi-zonal bilinear model is then combined to obtain a fuzzy model using the Takagi-Sugeno method (1985). It is shown that this model predicts the behavior of the system fairly accurately. The fuzzy mode... View full abstract»

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  • Improving TCP performance over wireless links

    Publication Year: 1998, Page(s):332 - 335 vol.2
    Cited by:  Papers (7)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (352 KB)

    TCP is the most common transport protocol used in the Internet. It was designed primarily for wired networks. The characteristics of wireless links is very different from wired links, particularly in terms of the loss behaviour. This results in poor TCP performance over wireless links. We have proposed enhancements to TCP so that it can differentiate between a loss due to congestion, and a loss du... View full abstract»

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  • Modelling and control design for self-excited induction generator with solid-state lead-lag VAr compensator in micro-hydro energy conversion scheme

    Publication Year: 1998, Page(s):398 - 401 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (376 KB)

    This paper deals with the design of single-input single-output control system for voltage control of a stand-alone self-excited induction generator (SEIG) employing inductively loaded current controlled solid-state lead-lag (ICSL) VAr compensator. The ICSL compensator has wide lead and lag VAr controlling capability, requires few inductive elements and is of low cost. The prime mover for SEIG is c... View full abstract»

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  • Comparison of PI, VSC and energy balance controller for single phase active filter control

    Publication Year: 1998, Page(s):607 - 614 vol.2
    Cited by:  Patents (28)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (444 KB)

    This paper presents a comparison among proportional-integral, variable structure voltage controller and energy balance controller for the control of single phase active filter. Proportional-integral (PI) and variable structure (VSC) voltage controller have been employed over DC bus voltage of the active filter. The energy balance controller is based on the estimation of the active power required b... View full abstract»

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  • New perceptions in integrated power system operation and control

    Publication Year: 1998, Page(s):489 - 496 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (636 KB)

    In the persistence of generation capacity shortages, increasing demand, private sector participation and interconnections of power systems, the operational and control tasks have become complex and multi dimensional. This paper is aimed to put forth the changing power scenario, nature and challenges being faced in successful operation, emergency control practices and new technology emerging to han... View full abstract»

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  • On implementation of a nonuniform sampling strategy

    Publication Year: 1998, Page(s):328 - 331 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (260 KB)

    An implementation of a nonuniform sampling strategy based on the estimation of the local bandwidth of a signal has been proposed. It is demonstrated that a significant data reduction for storage and transmission is possible by this strategy for some typical nonstationary signals like the EGG, EEG, and the `burst' type marine signals View full abstract»

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  • Nested neural networks for image compression

    Publication Year: 1998, Page(s):369 - 372 vol.2
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (280 KB)

    Data compression occurs naturally in the human brain. The brain detects features and the context to any input signal and associates with it a name and form. The use of artificial neural networks for compressing data has been used in the past with some degree of success. The difficulty with this technique is that even though it may achieve a high compression ratio, it provides only the `approximate... View full abstract»

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  • Broadband via satellite

    Publication Year: 1998, Page(s):603 - 606 vol.2
    Cited by:  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (332 KB)

    Asynchronous transfer mode is a widely accepted networking technology as a switching and multiplexing technique for broadband ISDN. Satellites provide services over a wide geographical area with very flexible bandwidth-on-demand capabilities and immunity to terrestrial disasters. ATM cells can be transported by using the existing digital transmission format over the satellite systems. This paper d... View full abstract»

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  • Design considerations for multi-layered mobile communications systems

    Publication Year: 1998, Page(s):623 - 626 vol.2
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (388 KB)

    In a multi-layered third generation system which is over laid with pico cells, micro cells, macro cells and mega cells; the propagation characteristics are expected to impose stricter requirements in relation to handover, channel assignment and cell grouping than for the current systems. It is therefore important that these issues be addressed when modeling the third generation systems. This paper... View full abstract»

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  • Incorporating UPFC model into the power system toolbox of the MATLAB for transient stability study

    Publication Year: 1998, Page(s):506 - 509 vol.2
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (332 KB)

    In this paper, power frequency model for unified power flow controller (UPFC) is presented with its DC link capacitor dynamics included. A novel interface of UPFC to AC network for transient stability study is then suggested and realised using Power System Toolbox (PST) of MATLAB. The control strategies for UPFC shunt and series elements are also discussed. Computer results on a 4-generator interc... View full abstract»

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  • Optimum power system stabilizer parameters as affected by the amortisseurs of the synchronous generator

    Publication Year: 1998, Page(s):540 - 543 vol.2
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (272 KB)

    This paper deals with the development of small perturbation dynamic model of a single machine-infinite bus system. A systematic approach based on phase compensation technique for designing optimum power system stabilizers has been presented. Investigations reveal that for designing optimum PSS, the amortisseurs in the synchronous generator model can be neglected comfortably and hence results in co... View full abstract»

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  • A new approach for security constrained economic emission dispatch in power systems

    Publication Year: 1998, Page(s):470 - 473 vol.2
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (320 KB)

    This paper presents the solution of security constrained economic emission dispatch in power systems using a stochastic search technique termed as SEEDSS. SEEDSS is a truly multi-objective technique that minimizes cost of generation, emission of hazardous gases and maximizes the security margin simultaneously. Various solutions provided by SEEDSS in a single run include those with minimum values o... View full abstract»

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  • Energy efficient line start permanent magnet synchronous motor

    Publication Year: 1998, Page(s):379 - 382 vol.2
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (292 KB)

    Line start permanent magnet synchronous motor has the potential for energy saving. Different issues regarding rotor of this machine are discussed in this paper. Energy saving potential of the commonly used rotor geometries for this machine is compared with the help of nonlinear model based on phasor diagram. The new rotor geometry, which eliminates the drawbacks of conventionally used rotor geomet... View full abstract»

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  • An 8-element switched-beam array antenna for mobile satellite communications

    Publication Year: 1998, Page(s):241 - 244 vol.2
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (544 KB)

    Conventional designs of phased array antennas for mobile satellite communications carry a high price tag. Hence antenna designers look for alternative low-cost solutions. In the paper, the design and development of a low-cost 8-element switched-beam array antenna is presented. The array elements are arranged in a circle on the side of a truncated cone whose inclination angle matches the satellite ... View full abstract»

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  • Inversion of recurrent neural networks for control of non-linear systems

    Publication Year: 1998, Page(s):642 - 647 vol.2
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (340 KB)

    Recurrent neural networks can be used for both the identification and control of non-linear systems. This paper takes a previously derived set of theoretical results about recurrent neural networks and applies them to task of providing internal model control for a non-linear plant. Using the theoretical results, we show how an inverse controller can be produced from a neural network model of the p... View full abstract»

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  • A simple microcontroller based building block for digital communication applications

    Publication Year: 1998, Page(s):324 - 327 vol.2
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (252 KB)

    This paper describes the design of a simple building block for applications in the area of digital communication. The simple building block functions mainly as a digitally programmable oscillator (DPO) extendable to work as a BFSK modulator. The DPO is designed using an LM 565 PLL chip, the centre frequency of the VCO within which is controlled by an 8031 microcontroller using binary weighted swit... View full abstract»

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  • Design of profibus compatible smart transmitter

    Publication Year: 1998, Page(s):365 - 368 vol.2
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (220 KB)

    The transmitter is a field mounted device used to sense and transmit process variable values over the cables to some remotely placed controller. Keeping an eye on the increased demand for local intelligence of the transmitter in the process industry, a smart transmitter (STx) is designed. This smart transmitter is expected to replace the conventional transmitter following the 4-20 mA current loop ... View full abstract»

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  • Jagadis Chandra Bose: millimetre wave research in the nineteenth century

    Publication Year: 1998, Page(s):282 - 287 vol.2
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (740 KB)

    In the last decade of the nineteenth century, many experimenters began working with the newly discovered “Hertzian waves.” J.C. Bose (1897, 1907, 1927) in particular investigated the properties of waves and materials in the short cm- to mm-wave part of the spectrum. He used waveguides, horn antennas, dielectric lenses, various polarisers, and even semiconductors at frequencies as high ... View full abstract»

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