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Faculty of Engineering and Information Sciences - Papers: Part A

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Full-Text Articles in Social and Behavioral Sciences

Hybrid Model Predictive Control Of A Residential Hvac System With On-Site Thermal Energy Generation And Storage, Massimo Fiorentini, Josh Wall, Zhenjun Ma, Julio H. Braslavsky, Paul Cooper Jan 2017

Hybrid Model Predictive Control Of A Residential Hvac System With On-Site Thermal Energy Generation And Storage, Massimo Fiorentini, Josh Wall, Zhenjun Ma, Julio H. Braslavsky, Paul Cooper

Faculty of Engineering and Information Sciences - Papers: Part A

This paper describes the development, implementation and experimental investigation of a Hybrid Model Predictive Control (HMPC) strategy to control solar-assisted heating, ventilation and air-conditioning (HVAC) systems with on-site thermal energy generation and storage. A comprehensive approach to the thermal energy management of a residential building is presented to optimise the scheduling of the available thermal energy resources to meet a comfort objective. The system has a hybrid nature with both continuous variables and discrete, logic-driven operating modes. The proposed control strategy is organized in two hierarchical levels. At the high-level, an HMPC controller with a 24-h prediction horizon and a ...


Anonymous Announcement System (Aas) For Electric Vehicle In Vanets, Man Ho Au, Joseph K. Liu, Zhenfei Zhang, Willy Susilo, Jin Li, Jianying Zhou Jan 2017

Anonymous Announcement System (Aas) For Electric Vehicle In Vanets, Man Ho Au, Joseph K. Liu, Zhenfei Zhang, Willy Susilo, Jin Li, Jianying Zhou

Faculty of Engineering and Information Sciences - Papers: Part A

Vehicular Ad Hoc Network (VANET) allows vehicles to exchange information about road and traffic conditions through wireless communications. Nevertheless, providing reliable and authenticated information without violating the user's privacy seems contradictory. In this paper, we propose an Anonymous Announcement System especially designed for Electric Vehicle (EV) in VANETs to achieve the aforementioned contradictory goals. We demonstrated the feasibility of the protocol with a prototype implementation on a suitable device and a network simulation with our protocol added on top of a normal VANET.


A Magnetically Actuated Drug Delivery System For Robotic Endoscopic Capsules, Fredy Munoz, Gursel Alici, Weihua Li Jan 2016

A Magnetically Actuated Drug Delivery System For Robotic Endoscopic Capsules, Fredy Munoz, Gursel Alici, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part A

There is an increasing need to incorporate an actively controlled drug delivery system (DDS) into the next generation of capsule endoscopy in order to treat diseases in the gastrointestinal tract in a noninvasive way. Despite a number of attempts to magnetically actuate drug delivery mechanisms embedded in endoscopic capsules, longer operating distances and further miniaturization of on-board components are still drawbacks of such systems. In this paper, we propose an innovative magnetic system that consists of an array of magnets, which activates a DDS, based on an overly miniaturized slider-crank mechanism. We use analytical models to compare the magnetic fields ...


Effect Of Grain Size On Springback And System Energy In Micro V-Bending With Phosphor Bronze Foil, Zhi Fang, Zhengyi Jiang, Xiaogang Wang, Cunlong Zhou, Xianming Zhao, Xiaoming Zhang, Di Wu Jan 2016

Effect Of Grain Size On Springback And System Energy In Micro V-Bending With Phosphor Bronze Foil, Zhi Fang, Zhengyi Jiang, Xiaogang Wang, Cunlong Zhou, Xianming Zhao, Xiaoming Zhang, Di Wu

Faculty of Engineering and Information Sciences - Papers: Part A

In this paper, the effect of grain size on springback in the micro V-bending process of phosphor bronze foil (face-centered cubic structure) is investigated. Grain size effect is expressed by the ratio of material thickness (T) to average grain size (D), and these T/D values are divided into three groups: larger than 1, less than 1, and approximately equal to 1. It has been found that springback angles were the lowest when T/D ≈ 1. Electron backscattering diffraction (EBSD) measurement results show that the twinning boundaries change with the ratios of T/D before and after bending. When T ...


A Traffic Monitoring System For A Mixed Traffic Flow Via Road Estimation And Analysis, Nguyen Viet Hung, Le Chung Tran, Nguyen Hoang Dung, Thang Manh Hoang, Nguyen Tien Dzung Jan 2016

A Traffic Monitoring System For A Mixed Traffic Flow Via Road Estimation And Analysis, Nguyen Viet Hung, Le Chung Tran, Nguyen Hoang Dung, Thang Manh Hoang, Nguyen Tien Dzung

Faculty of Engineering and Information Sciences - Papers: Part A

A Traffic Monitoring System (TMS) is the most important element in the Intelligent Transportation Systems (ITS), especially in a developing country like Vietnam with a mixed traffic flow of vehicles including motocycles and cars. A traffic flow varies in different daytime, therefore the adoption of the TMS for an adaptive control of the traffic light timing is very essential. The proposed TMS system uses one CCD camera mounted to view from the rear of moving vehicles appearing in a distance from a viewed span of the camera to the stopline of the cross-roads, which is denoted by L and statistically ...


Towards An Automated Robotic Arc-Welding-Based Additive Manufacturing System From Cad To Finished Part, Donghong Ding, Chen Shen, Zengxi Stephen Pan, Dominic Cuiuri, Hui Jun Li, Nathan P. Larkin, Stephen Van Duin Jan 2016

Towards An Automated Robotic Arc-Welding-Based Additive Manufacturing System From Cad To Finished Part, Donghong Ding, Chen Shen, Zengxi Stephen Pan, Dominic Cuiuri, Hui Jun Li, Nathan P. Larkin, Stephen Van Duin

Faculty of Engineering and Information Sciences - Papers: Part A

Arc welding has been widely explored for additive manufacturing of large metal components over the last three decades due to its lower capital cost, an unlimited build envelope, and higher deposition rates. Although significant improvements have been made, an arc welding process has yet to be incorporated in a commercially available additive manufacturing system. The next step in exploiting "true" arc-welding-based additive manufacturing is to develop the automation software required to produce CAD-to-part capability. This study focuses on developing a fully automated system using robotic gas metal arc welding to additively manufacture metal components. The system contains several modules, including ...


Two-Factor Data Security Protection Mechanism For Cloud Storage System, Joseph K. Liu, Kaitai Liang, Willy Susilo, Jianghua Liu, Yang Xiang Jan 2016

Two-Factor Data Security Protection Mechanism For Cloud Storage System, Joseph K. Liu, Kaitai Liang, Willy Susilo, Jianghua Liu, Yang Xiang

Faculty of Engineering and Information Sciences - Papers: Part A

In this paper, we propose a two-factor data security protection mechanism with factor revocability for cloud storage system. Our system allows a sender to send an encrypted message to a receiver through a cloud storage server. The sender only needs to know the identity of the receiver but no other information (such as its public key or its certificate). The receiver needs to possess two things in order to decrypt the ciphertext. The first thing is his/her secret key stored in the computer. The second thing is a unique personal security device which connects to the computer. It is ...


Development And Performance Evaluation Of A Liquid Desiccant Air Conditioning System With Hybrid Electrodialysis And Thermal Regeneration, Yi Guo, Zhenjun Ma, Ali Hussein Al-Jubainawi, Paul Cooper, Long D. Nghiem Jan 2016

Development And Performance Evaluation Of A Liquid Desiccant Air Conditioning System With Hybrid Electrodialysis And Thermal Regeneration, Yi Guo, Zhenjun Ma, Ali Hussein Al-Jubainawi, Paul Cooper, Long D. Nghiem

Faculty of Engineering and Information Sciences - Papers: Part A

Liquid desiccant air conditioning (LDAC) systems have gained increasing attention due to the improved energy performance and reduced environmental impacts. This paper presents an LDAC system using electrodialysis (ED) as well as low grade heat generated from a hybrid photovoltaic thermal and evacuated tube (PVT-ET) collector for liquid desiccant regeneration. As ED regenerator is a key component in the proposed system, a modified mathematical model is used to simulate the mass transfer of the ED stack. The performance of the model was validated using the experimental data generated based on a lab-scale experimental setup. It is shown that the model ...


A New Algorithm For Protecting Aggregate Business Microdata Via A Remote System, Yue Ma, Yan-Xia Lin, James O. Chipperfield, John Newman, Victoria Leaver Jan 2016

A New Algorithm For Protecting Aggregate Business Microdata Via A Remote System, Yue Ma, Yan-Xia Lin, James O. Chipperfield, John Newman, Victoria Leaver

Faculty of Engineering and Information Sciences - Papers: Part A

Releasing business microdata is a challenging problem for many statistical agencies. Businesses with distinct continuous characteristics such as extremely high income could easily be identified while these businesses are normally included in surveys representing the population. In order to provide data users with useful statistics while maintaining confidentiality, some statistical agencies have developed online based tools to allow users to specify and request tables created from microdata. These tools only release perturbed cell values generated from automatic output perturbation algorithms in order to protect each underlying observation against various attacks, such as differencing attacks. An example of the perturbation algorithms ...


Stability Control Of Force-Reflected Nonlinear Multilateral Teleoperation System Under Time-Varying Delays, Da Sun, Fazel Naghdy, Haiping Du Jan 2016

Stability Control Of Force-Reflected Nonlinear Multilateral Teleoperation System Under Time-Varying Delays, Da Sun, Fazel Naghdy, Haiping Du

Faculty of Engineering and Information Sciences - Papers: Part A

A novel control algorithm based on the modified wave-variable controllers is proposed to achieve accurate position synchronization and reasonable force tracking of the nonlinear single-master-multiple-slave teleoperation system and simultaneously guarantee overall system's stability in the presence of large time-varying delays. The system stability in different scenarios of human and environment situations has been analyzed. The proposed method is validated through experimental work based on the 3-DOF trilateral teleoperation system consisting of three different manipulators. The experimental results clearly demonstrate the feasibility of the proposed algorithm to achieve high transparency and robust stability in nonlinear single-master-multiple-slave teleoperation system in the ...


Exploring Structure And Role Of Engineering Asset Management System In Production Organizations, Khaled O. El-Akruti, Richard Dwight, Tieling Zhang Jan 2016

Exploring Structure And Role Of Engineering Asset Management System In Production Organizations, Khaled O. El-Akruti, Richard Dwight, Tieling Zhang

Faculty of Engineering and Information Sciences - Papers: Part A

Little has been done in literature on the structure of Engineering Asset Management System (EAMS) and its relationship to production and organizational strategy. In this paper, the position of an EAMS within an organizational structure and its strategic role within a production organizations strategy has been explored. It is argued that the structure and mechanism of EAMS play a key role in directing the production process and linking to the organizational strategy: the absence or inadequacies of asset-related activities cause insufficient production performance that negatively impacts the strategic achievement. Production Actions are mapped with reference to the activities of the ...


Optimization Of A Ceiling Ventilation System With Integrated Photovoltaic Thermal Collectors And Phase Change Materials, Zhenjun Ma, Wenye Lin, Mohammed I. Sohel Jan 2016

Optimization Of A Ceiling Ventilation System With Integrated Photovoltaic Thermal Collectors And Phase Change Materials, Zhenjun Ma, Wenye Lin, Mohammed I. Sohel

Faculty of Engineering and Information Sciences - Papers: Part A

This paper presents the performance evaluation and design optimization of a ceiling ventilation system with integrated solar photovoltaic thermal (PVT) collectors and phase change materials (PCMs) by using a hybrid Particle Swarm Optimization and Hooke-Jeeves Pattern search (PSO-HJ) algorithm. In this novel ceiling ventilation system, the PVT collectors are used to generate electricity and provide the low-grade heating energy for buildings by using the winter daytime solar radiation, while the PCM is integrated into the building ceiling as part of the ceiling insulation and at the same time, as a centralized thermal energy storage unit to temporally store the low-grade ...


A Semantic Web Vision For An Intelligent Community Transport Service Brokering System, S K. Lau, Reza R. Zamani, Willy Susilo Jan 2016

A Semantic Web Vision For An Intelligent Community Transport Service Brokering System, S K. Lau, Reza R. Zamani, Willy Susilo

Faculty of Engineering and Information Sciences - Papers: Part A

Advances in semantic web research in recent years offer an opportunity for heterogeneous objects to exchange data and information in an interoperable way to make data and services machine-accessible and machine-processable. This paper describes a semantic web vision for an intelligent community transport service brokering system. The use of ontological approach to develop a semantic web brokering system opens up the data set for agent-based planning in reservation and scheduling. As ontologies are the building blocks of the semantic web and small simple ontologies are often constructed individually by different users, ontology integration approach is proposed to achieve data interoperability ...


A Review Of Topologies Of Three-Port Dc-Dc Converters For The Integration Of Renewable Energy And Energy Storage System, Neng Zhang, Danny Sutanto, Kashem M. Muttaqi Jan 2016

A Review Of Topologies Of Three-Port Dc-Dc Converters For The Integration Of Renewable Energy And Energy Storage System, Neng Zhang, Danny Sutanto, Kashem M. Muttaqi

Faculty of Engineering and Information Sciences - Papers: Part A

The application of renewable energy such as solar photovoltaic (PV), wind and fuel cells is becoming increasingly popular because of the environmental awareness and advances in technology coupled with decreasing manufacturing cost. Power electronic converters are usually used to convert the power from the renewable sources to match the load demand and grid requirement to improve the dynamic and steady-state characteristics of these green generation systems, to provide the maximum power point tracking (MPPT) control, and to integrate the energy storage system to solve the challenge of the intermittent nature of the renewable energy and the unpredictability of the load ...


Size Optimization Of A Magnetic System For Drug Delivery With Capsule Robots, Fredy Munoz, Gursel Alici, Weihua Li, Metin Sitti Jan 2016

Size Optimization Of A Magnetic System For Drug Delivery With Capsule Robots, Fredy Munoz, Gursel Alici, Weihua Li, Metin Sitti

Faculty of Engineering and Information Sciences - Papers: Part A

In this paper, we present a methodology for the size optimization of an external magnetic system made of arc-shaped permanent magnets (ASMs). This magnetic system is able to remotely actuate a drug-release module embedded in a prototype of a capsule robot. The optimization of the magnetic system is carried out by using an accurate analytical model that is valid for any arbitrary dimensions of the ASMs. By using this analytical model, we perform parametric studies and conduct a statistical analysis [analysis of variance (ANOVA)] to investigate efficient ways to distribute the volume of the ASMs so that the dimensions and ...


Driver Alerting System Using Range Estimation Of Electric Vehicles In Real Time Under Dynamically Varying Environmental Conditions, Vincent R. Tannahill, Kashem M. Muttaqi, Danny Sutanto Jan 2016

Driver Alerting System Using Range Estimation Of Electric Vehicles In Real Time Under Dynamically Varying Environmental Conditions, Vincent R. Tannahill, Kashem M. Muttaqi, Danny Sutanto

Faculty of Engineering and Information Sciences - Papers: Part A

As the technology supporting electric vehicles (EVs) is rapidly progressing and the cost of EV components is reducing, EVs are becoming more feasible for use in Australia and in many countries around the world. However, the public perception of EVs and their perceived limitations result in a slow uptake of the technology, partially because of the uncertainty regarding the ability of an EV to meet the driving needs of the general population. Range anxiety is a particular concern with drivers having fear of being stranded by a depleted EV battery. This study explores means of reducing range anxiety by taking ...


The Effect Of Geometry And Material Properties On The Performance Of A Small Hydraulic Mckibben Muscle System, Danial Sangian, Sina Naficy, Geoffrey M. Spinks, Bertrand Tondu Jan 2015

The Effect Of Geometry And Material Properties On The Performance Of A Small Hydraulic Mckibben Muscle System, Danial Sangian, Sina Naficy, Geoffrey M. Spinks, Bertrand Tondu

Faculty of Engineering and Information Sciences - Papers: Part A

Fluidic McKibben artificial muscles are one of the most popular biomimetic actuators, showing similar static and dynamic performance to skeletal muscles. In particular, their pneumatic version offers high-generated force, high speed and high strain in comparison to other actuators. This paper investigates the development of a small-size, fully enclosed, hydraulic McKibben muscle powered by a low voltage pump. Hydraulic McKibben muscles with an outside diameter of 6 mm and a length ranging from 35 mm to 80 mm were investigated. These muscles are able to generate forces up to 26 N, strains up to 23%, power to mass of 30 ...


Three Dimensional Dose Verification Of Vmat Plans Using The Octavius 4d Dosimetric System, Sankar Arumugam, Aitang Xing, Tony Young, David Thwaites, Lois C. Holloway Jan 2015

Three Dimensional Dose Verification Of Vmat Plans Using The Octavius 4d Dosimetric System, Sankar Arumugam, Aitang Xing, Tony Young, David Thwaites, Lois C. Holloway

Faculty of Engineering and Information Sciences - Papers: Part A

The Octavius 4D dosimetric system generates a 3D dose matrix based on a measured planar dose and user supplied Percentage Depth Dose (PDD) data. The accuracy of 3D dose matrices reconstructed by the Octavius 4D dosimetric system was systematically studied for an open static field, an open arc field and clinical VMAT plans. The Octavius reconstructed 3D dose matrices were compared with the Treatment Planning System (TPS) calculated 3D dose matrices using 3D gamma (gamma) analysis with 2%/2mm and 3%/3mm tolerance criteria. The larger detector size in the 2D detector array of the Octavius system resulted in failed ...


Stability Enhancement Of Magnetic Levitation Ball System With Two Controlled Electomagnets, Hai Huang, Haiping Du, Weihua Li Jan 2015

Stability Enhancement Of Magnetic Levitation Ball System With Two Controlled Electomagnets, Hai Huang, Haiping Du, Weihua Li

Faculty of Engineering and Information Sciences - Papers: Part A

Magnetic levitation ball system is a highly nonlinear and unstable system. If the system is linearised at the equilibrium point, the achievable balance range of the magnetically levitated ball is very short with one electromagnet. This paper presents an improved magnetic levitation ball system, that contains two electromagnets, where one electromagnet is set above the magnetic ball for pulling, and another one is set under the magnetic ball for pushing. In addition, this paper applies a 2-DOF (degree-of-freedom) PID (proportional-integral-derivative) controller instead of 1-DOF PID for the control of the two electromagnets so that they can work corporately to make ...


Tactile Sensing System Using Electro-Tactile Feedback, Daniel Pamungkas, Koren Ward Jan 2015

Tactile Sensing System Using Electro-Tactile Feedback, Daniel Pamungkas, Koren Ward

Faculty of Engineering and Information Sciences - Papers: Part A

2015 IEEE. Tactile or touch sensing can enable an object's surface texture and other properties to be perceived which can facilitate grasping and manipulating various objects. Prosthetic hand users and operators of tele-operated robot arms also need to perceive these tactile properties by some means to effectively manipulate objects and performed skilled work. This paper introduces a tactile sensing and feedback system that is based on detecting surface vibrations in an artificial finger, when contact or friction with a surface is made, and appropriately stimulating nerves in the user's skin with electro-tactile feedback. This feedback system has benefits ...


Development And Optimization Of An Innovative Hvac System With Integrated Pvt And Pcm Thermal Storage For A Net-Zero Energy Retrofitted House, Massimo Fiorentini, Paul Cooper, Zhenjun Ma Jan 2015

Development And Optimization Of An Innovative Hvac System With Integrated Pvt And Pcm Thermal Storage For A Net-Zero Energy Retrofitted House, Massimo Fiorentini, Paul Cooper, Zhenjun Ma

Faculty of Engineering and Information Sciences - Papers: Part A

This paper describes a novel solar-assisted HVAC system developed for the Team UOW 'Illawarra Flame' Solar Decathlon house, the winner of the Solar Decathlon China 2013 competition. This HVAC system consists of an air-based photovoltaic-thermal (PVT) collector and a phase change material (PCM) thermal storage unit integrated with a reverse cycle heat pump, in a ducted system. The system was designed for operation during both winter and summer using daytime solar radiation and night-time sky radiative cooling, respectively. The PVT collector heats or cools fresh air from ambient and thereby provides heating or cooling either directly to the indoor space ...


Evaluation Of A Partial Ring Design For The Insert Spect/Mri System, Kell Erlandsson, Debora Slavado, Alexandre B. Bousse, Brian F. Hutton Jan 2015

Evaluation Of A Partial Ring Design For The Insert Spect/Mri System, Kell Erlandsson, Debora Slavado, Alexandre B. Bousse, Brian F. Hutton

Faculty of Engineering and Information Sciences - Papers: Part A

The aim of the INSERT project is to develop a SPECT insert for a commercial MRI system, for performing simultaneous SPECT/MRI brain studies in humans. We have previously investigated various design options for the detector system, based on a complete ring of detectors. We are now considering a partial ring, due to space limitations. We have investigated the degradation in image quality with a partial ring as compared to a full ring, and the possibility of addressing the limitations by utilising MRI data during reconstruction. Noise-free data were generated by forward-projecting a cylindrical phantom with spherical inserts for a ...


Mlaas: A Cloud System For Mobile Micro Learning In Mooc, Geng Sun, Tingru Cui, Shiping Chen, Wanwu Guo, Jun Shen Jan 2015

Mlaas: A Cloud System For Mobile Micro Learning In Mooc, Geng Sun, Tingru Cui, Shiping Chen, Wanwu Guo, Jun Shen

Faculty of Engineering and Information Sciences - Papers: Part A

No abstract provided.


A Decentralized Multiagent-Based Voltage Control For Catastrophic Disturbances In A Power System, Sk. Razibul Islam, Kashem M. Muttaqi, Danny Sutanto Jan 2015

A Decentralized Multiagent-Based Voltage Control For Catastrophic Disturbances In A Power System, Sk. Razibul Islam, Kashem M. Muttaqi, Danny Sutanto

Faculty of Engineering and Information Sciences - Papers: Part A

In this paper, a multiagent-based voltage and reactive power control in the case of a multiple contingency is presented. Incorporating the agent-based autonomous feature to the intelligence of the remote terminal units, the present power system control structure can be used to help in preventing system voltage collapse during catastrophic disturbances. The control algorithm is based on a decentralized architecture of intelligent agents and the determination of a local zone that can carry out quick countermeasures in a decentralized manner as a multiagent system (MAS) during an emergency situation. An adaptive determination of the local zones undergoing voltage collapse has ...


Experimental Investigation Of An Innovative Hvac System With Integrated Pvt And Pcm Thermal Storage For A Net-Zero Energy Retrofitted House, Massimo Fiorentini, Paul Cooper, Zhenjun Ma, Josh Wall Jan 2015

Experimental Investigation Of An Innovative Hvac System With Integrated Pvt And Pcm Thermal Storage For A Net-Zero Energy Retrofitted House, Massimo Fiorentini, Paul Cooper, Zhenjun Ma, Josh Wall

Faculty of Engineering and Information Sciences - Papers: Part A

This paper presents the experimental investigation of a novel solar assisted HVAC system developed for the Team UOW Solar Decathlon house, the overall winner of the Solar Decathlon China 2013 competition. This novel HVAC system consists of an air based photovoltaic-thermal (PVT) system and a phase change material (PCM) thermal storage unit integrated with a ducted system with a reverse-cycle heat pump. The system has been designed for operation during both winter and summer, using daytime solar radiation and night sky radiative cooling to increase the energy efficiency of the air-conditioning system. The PVT system can exchange heat with the ...


Electro-Tactile Feedback System For A Prosthetic Hand, Daniel Pamungkas, Koren Ward Jan 2015

Electro-Tactile Feedback System For A Prosthetic Hand, Daniel Pamungkas, Koren Ward

Faculty of Engineering and Information Sciences - Papers: Part A

Without the sense of touch, amputees with prosthetic hands can have difficulty holding and manipulating objects, especially when a task requires some degree of skill and tactile feedback to perform. To equip prosthetic hand users with touch sensing and tactile feedback, researchers have been experimenting with various types of force and/or tactile sensors together with various methods for delivering the tactile information to the brain. Although some success has been achieved recently with force sensors and implanted electrodes, these systems are expensive, surgically invasive and can represent an infection risk where cables emerge through the skin. Also, non-invasive tactile ...


A New Approach To Reduce The Expected Energy Not Supplied In A Power Plant Located In A Non-Expandable Transmission System, Hadi Lomei, Danny Sutanto, Kashem M. Muttaqi, Mohsen Assili Jan 2015

A New Approach To Reduce The Expected Energy Not Supplied In A Power Plant Located In A Non-Expandable Transmission System, Hadi Lomei, Danny Sutanto, Kashem M. Muttaqi, Mohsen Assili

Faculty of Engineering and Information Sciences - Papers: Part A

The main objective of most of power plants is to inject power as much as possible into the grid from the power plants. However, the transmission system may restrain the output capability of the power plant, especially, if the power plant is located in an area of non-expandable transmission system. In this situation, any disturbance in the nearby transmission system may force the plant to generate lower than its rated value, which disables it from selling the remaining available generated power to the costumers and also increases the cost of energy not supplied. In this paper, an efficient method is ...


A New Approach To Reduce The Non-Linear Characteristics Of A Stressed Power System By Using The Normal Form Technique In The Control Design Of The Excitation System, Hadi Lomei, Danny Sutanto, Kashem M. Muttaqi, Mohsen Assili Jan 2015

A New Approach To Reduce The Non-Linear Characteristics Of A Stressed Power System By Using The Normal Form Technique In The Control Design Of The Excitation System, Hadi Lomei, Danny Sutanto, Kashem M. Muttaqi, Mohsen Assili

Faculty of Engineering and Information Sciences - Papers: Part A

In this paper, a new approach is presented to reduce the nonlinear characteristics of a stressed power system by reducing its second-order modal interaction through retuning some parameters of the generator excitation system. In order to determine the second-order modal interaction of the system, a new index on nonlinearity is developed using normal form theory. Using the proposed index of nonlinearity, a sensitivity function is formed to indicate the most effective excitation system parameters in the nonlinear behavior of the system. These dominant parameters are tuned to reduce the second-order modal interaction of the system and to reduce the index ...


Enhanced Frequency Response Strategy For Pmsg Based Wind Energy Conversion System Using Ultracapacitor In Remote Area Power Supply Systems, Yingjie Tan, Kashem M. Muttaqi Jan 2015

Enhanced Frequency Response Strategy For Pmsg Based Wind Energy Conversion System Using Ultracapacitor In Remote Area Power Supply Systems, Yingjie Tan, Kashem M. Muttaqi

Faculty of Engineering and Information Sciences - Papers: Part A

The high penetration level of wind energy, and non-responsive nature of power electronic interfaced wind energy conversion system (WECS) during frequency variations may create significant stress on conventional generators in a wind-diesel hybrid remote area power supply (RAPS) system. Hence, it is a necessity for WECS to provide frequency support. However, conventional frequency control strategies being used for WECS may impose a severe stress to wind turbines. In this paper, an enhanced frequency response strategy is proposed for the permanent magnet synchronous generator (PMSG) based WECS to regulate RAPS system frequency jointly with its integrated ultracapacitors. The proposed frequency response ...


Analysis On The Transient Of A Self-Mixing Interferometry Sensing System, Yuanlong Fan, Bin Liu, Yanguang Yu, Jiangtao Xi, Qinghua Guo, Jun Tong Jan 2015

Analysis On The Transient Of A Self-Mixing Interferometry Sensing System, Yuanlong Fan, Bin Liu, Yanguang Yu, Jiangtao Xi, Qinghua Guo, Jun Tong

Faculty of Engineering and Information Sciences - Papers: Part A

The transient of a self-mixing interferometry (SMI) sensing system is investigated in this paper by solving the well known Lang and Kobayashi (LK) equations. Specifically, the influence of two important system parameters, i.e., the feedback level factor and the linewidth enhancement factor, on the transient is discussed, showing that the decay time and the oscillation period of the transient respectively increases and decreases with the increase of the feedback level factor, and both increase with the increase of linewidth enhancement factor. The results presented in this paper are useful for designing a stable SMI system.