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Automation and Computing (ICAC), 2012 18th International Conference on

Date 7-8 Sept. 2012

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Displaying Results 1 - 25 of 72
  • [Cover]

    Publication Year: 2012, Page(s): 1
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  • [Title page]

    Publication Year: 2012, Page(s): 1
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  • Interface

    Publication Year: 2012, Page(s): 1
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  • Program & organizing committees

    Publication Year: 2012, Page(s): 1
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  • Table of content

    Publication Year: 2012, Page(s):1 - 4
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  • Optimal control and energy efficiency — Integration of design and engineering

    Publication Year: 2012, Page(s): 1
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  • Estimation of maximum allowable time-delay bound for system stability of network controlled parallel DC/DC buck converters

    Publication Year: 2012, Page(s):1 - 6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (340 KB) | HTML iconHTML

    The current trend in distributed energy system control is moving toward implementing quasi-decentralized control strategy where the control signals are exchanged over shared dedicated control or communication networks which reduces the complexity in the wiring and enhances the reliability. Transmitting control signals through shared networks induces time delays and data losses which may destabiliz... View full abstract»

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  • Global Emergency Management System framework

    Publication Year: 2012, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (550 KB) | HTML iconHTML

    In meeting disaster management challenges of the 21st century, the traditional EMS has fallen short in various ways. The client-server model used in current implementations is plagued with weaknesses. Moreover, the national approach of individual countries amounts to resource and knowledge wastage. With the emergence of cloud computing technologies, a more advanced solution could be imp... View full abstract»

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  • Area and power optimisation for AES encryption module implementation on FPGA

    Publication Year: 2012, Page(s):1 - 6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (275 KB) | HTML iconHTML

    Ubiquitous computing has been getting deployed into many applications in daily life. However, one of the difficulties to make it reliable is the lack of security. The constraints of area and power are the challenges for the cryptographic algorithms to be implemented. In this paper, the implementation of Advanced Encryption Standard (AES) encryption algorithm is proposed in terms of resource and po... View full abstract»

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  • Input-constrained adaptive GPC for simple industrial plant

    Publication Year: 2012, Page(s):1 - 6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (409 KB) | HTML iconHTML

    One significant drawback of practical MPC schemes is the large computational burden, especially in adaptive and constrained situations. In this paper, previous work by the author towards a computationally efficient self-tuning Generalized Predictive Control scheme for low-order time delayed industrial plant is extended to include rate and amplitude constraints on the plant input. The paper discuss... View full abstract»

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  • On-chip PVT compensation technology for adaptive voltage scaling control in computer power management application

    Publication Year: 2012, Page(s):1 - 5
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (436 KB) | HTML iconHTML

    Power efficiency has become a major issue in computer Power Management Unit (PMU) as modern Integral Circuit (IC) is scaling toward smaller feature size. In high-performance computing applications, PMU electronics suffer from extensive Process-Voltage-Temperature (PVT) variation since high-level integration has exceeded physical limit of semiconductor material. This paper provides an overview of a... View full abstract»

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  • A novel multi-fold security framework for cognitive radio wireless ad-hoc networks

    Publication Year: 2012, Page(s):1 - 6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB) | HTML iconHTML

    Cognitive Radio (CR) Technology has emerged as a smart and intelligent technology to address the problem of spectrum scarcity and its under-utilization. CR nodes sense the environment for vacant channels, exchange control information, and agree upon free channels list (FCL) to use for data transmission and conclusion. CR technology is heavily dependent on the control channel to dialogue on the exc... View full abstract»

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  • A novel model-free prediction of power quality problems via DSTATCOM

    Publication Year: 2012, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (281 KB) | HTML iconHTML

    The distribution static compensator (DSTAT-COM) has benefitted from computer aided-design simulations. But its performance has been hampered by inadequacies in linear models of the power quality problem due to variations in system parameters, uncertainties and often missing gradient information. To address this problem, this paper applies model-free predictive control (MFPC) and describing functio... View full abstract»

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  • Fuzzy supervisory control strategies to minimise energy use of airport terminal buildings

    Publication Year: 2012, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (329 KB) | HTML iconHTML

    Airport terminal buildings are among energy most consuming buildings and this presents huge opportunities for implementing energy saving strategies. Achieving satisfactory control of these buildings using classical controllers alone is difficult because they contain components that are complex, nonlinear but dynamically related. Therefore, this paper presents and appraises fuzzy control strategies... View full abstract»

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  • Analysis and control of a single phase AC chopper in series connection with an auto-transformer

    Publication Year: 2012, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (288 KB) | HTML iconHTML

    In this paper, a novel topology of single phase AC chopper is presented. The AC chopper has the structure of a combined conventional AC chopper in series connection with an auto-transformer. Detailed design of the AC chopper and the associated filter are described in the paper. A combined feedforward and PI feedback control is applied to stabilize the output voltage at the desired level when it is... View full abstract»

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  • Dynamic performance of a dual-pressure waste heat recovery system under partial load operation

    Publication Year: 2012, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (295 KB) | HTML iconHTML

    The dual-pressure power generation systems are particularly suitable for recovering medium-grade waste heat from industrial processes. However, the heat recovery system usually operates under partial load conditions due to the frequent variations of exhaust gas conditions. The traditional static model is unable to predict the system dynamic behaviors. Hence, a dynamic model of the dual-pressure po... View full abstract»

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  • Gain-constrained filtering with probabilistic sensor delays and correlated noises

    Publication Year: 2012, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (310 KB) | HTML iconHTML

    In this paper, the gain-constrained recursive filtering problem is investigated for a class of time-varying stochastic systems with probabilistic sensor delays and correlated noises. The phenomenon of probabilistic sensor delays is modeled by introducing a diagonal matrix composed of Bernoulli distributed random variables taking values of 1 or 0, which means that the sensors may experience randoml... View full abstract»

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  • The role of IT in email preservation and archiving

    Publication Year: 2012, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (171 KB) | HTML iconHTML

    The paper explores the increasing demand of processing information efficiently and effectively. It uses email as a case study and considers the challenges of using IT to access, store, and utilise knowledge within email and explores a selection of the tools and techniques that are currently available. It provides a much needed outline of the issues that still need to be addressed by research in th... View full abstract»

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  • An analysis on decentralized adaptive MAC protocols for Cognitive Radio networks

    Publication Year: 2012, Page(s):1 - 5
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (276 KB) | HTML iconHTML

    The scarcity of bandwidth in the radio spectrum has become more vital since the demand for more and more wireless applications has increased. Most of the spectrum bands have been allocated although many studies have shown that these bands are significantly underutilized most of the time. The problem of unavailability of spectrum and inefficiency in its utilization has been smartly addressed by the... View full abstract»

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  • Neural predictive controller of nonlinear systems based on quasi-ARX neural network

    Publication Year: 2012, Page(s):1 - 6
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (280 KB) | HTML iconHTML

    This paper present a neural predictive controller (NPC) based on improved quasi-ARX neural network (IQARXNN) for nonlinear dynamical systems. The IQARXNN is used as a model identifier with switching algorithm and switching stability analysis. The primary controller is designed based on a modified Elman neural network (MENN) controller using back-propagation (BP) learning algorithm with modified pa... View full abstract»

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  • Power fundamental frequency detection based on orthometric average chirp-z transform

    Publication Year: 2012, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB) | HTML iconHTML

    Chirp-z transform (CZT) is usually used to refine frequency spectrum to analyze special frequency. The spectral resolution by CZT can be small as one wants but sometimes is wrongly considered as the same as accuracy. This paper discussed some characters of CZT about accuracy for monotone frequency signals. The CZT error decreases when the sampling time increases, and fluctuates periodically and di... View full abstract»

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  • A novel health probability for structural health monitoring

    Publication Year: 2012, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (327 KB) | HTML iconHTML

    A novel structural health monitoring strategy is proposed in this paper. A baseline model between the operating parameters and measurement features is established firstly to generate the baseline working feature and validated. Then a tolerance range of deviation of practical working features from the baseline model is computed based on normal distribution. Furthermore, health probability is define... View full abstract»

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  • Modulation signal bispectrum analysis of motor current signals for stator fault diagnosis

    Publication Year: 2012, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (313 KB) | HTML iconHTML

    Induction motors are the most widely used electrical machines in industry. To diagnose any possible incipient faults, many techniques have been developed. Motor current signature analysis (MCSA) is a common practice in industry to find motor faults. However, because small modulations due to faults it is difficult to quantify it in the measured signals which predominates with supply frequency, high... View full abstract»

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  • Multivariable simulation on a Homogeneous Charged Microwave Ignition system

    Publication Year: 2012, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (258 KB) | HTML iconHTML

    Petrol Internal Combustion Engines (ICEs) use a spark ignition system which have a low energy efficiency of only 25 % to 35% [1]. ICEs also produce an excessive amount of exhaust emissions. The idea of a Homogeneous Charged Microwave Ignition (HCMI) system is to combine the advantages of a Spark Ignition (SI) and of a Compression Ignition (CI) system. This can make a significant impact on the fuel... View full abstract»

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  • Research in the development of computational FE software for creep damage mechanics

    Publication Year: 2012, Page(s):1 - 6
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (557 KB) | HTML iconHTML

    This paper reports the preliminary development of the computational (finite element) software for creep damage analysis. Firstly, it reviews the current state of how to obtain such computational capability. Secondly, it completes with a flow diagram of the structure of new finite element software to be guided in developing in-house FE software. It further reports the strategy of how to obtain such... View full abstract»

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