Electrical and Computer Engineering Commons^™

Fault Locating In Large Distribution Systems By Empirical Mode Decomposition And Core Vector Regression, Benyamin Khorramdel Mr., Hesamoddin Marzooghi Mr., Haidar Samet Dr., Meisam Pourahmadi-Nakhli Mr., Mahdi Raoofat Dr.

Hesamoddin Marzooghi

This paper proposes an intelligent fault locating method using a new signal analysis technique called Empirical Mode Decomposition (EMD) and Core Vector Regression (CVR) for large distribution systems. The conventional fault locators are based on the measurement of post-fault line impedance suffering from the factors such as path fault impedance, system configuration and line loading, so that they have low accuracy. On the other hand, because of the vast range of resistances, the negative impact of damping factors affects the performance of travelling wave-based fault locators in large distribution systems. To overcome these problems, this paper uses a minimum measuring ...

Object Tracking By Pan Tilt System, Lily Hoang

University of Tennessee Honors Thesis Projects

No abstract provided.

Machine Learning Analysis Of Peripheral Physiology For Emotion Detection, Sarah M. Brown

Electrical and Computer Engineering Master's Theses

Peripheral physiological signals have shown promise as a measure of a person's emotional state. There are many applications where a more quantitative evaluation of an individual's mental state would be beneficial. For example, in PTSD or depression diagnosis, a quantitative measure to assist and compliment the qualitative assessments conducted by clinicians could reduce the time involved in treatment planning. A better understanding of the underlying mechanism is necessary for building systems that use these signals to assist in critical decision making.

Previous work in emotion research has relied upon averaging in time and then applying standard significance tests ...

Active Sensing For Dynamic, Non-Holonomic, Robust Visual Servoing, Avik De, Karl S. Bayer, Daniel E. Koditschek

Departmental Papers (ESE)

We consider the problem of visually servoing a legged vehicle with unicycle-like nonholonomic constraints subject to second-order fore-aft dynamics in its horizontal plane. We target applications to rugged environments characterized by complex terrain likely to perturb significantly the robot’s nominal dynamics. At the same time, it is crucial that the camera avoid “obstacle” poses where absolute localization would be compromised by even partial loss of landmark visibility. Hence, we seek a controller whose robustness against disturbances and obstacle avoidance capabilities can be assured by a strict global Lyapunov function. Since the nonholonomic constraints preclude smooth point stabilizability we introduce ...

Surface Analysis Of Materials For Direct Wafer Bonding, Arif Ul Alam

Open Access Dissertations and Theses

Surface preparation and its exposure to different processing conditions is a key step in heterogeneous integration of electronics, photonics, fluidics and/or mechanical components for More-than-Moore applications. Therefore, it is critical to understand how various processing and environmental conditions affect the surface properties of bonding substrates. In this thesis, the effects of oxygen reactive-ion etching (O₂ RIE) plasma followed by storage in ambient and 98% relative humidity on some key surface properties such as roughness, water contact angle, hardness, and the elemental and compositional states of three materials – silicon (Si), silicon dioxide (SiO₂) and glass – are investigated to ...

An Investigation Into The Role Of Energy And Symmetry At Epitaxial Interfaces, Gabriel A. Devenyi

Open Access Dissertations and Theses

Epitaxy is a key technological process for the production of thin films and nanostructures for electronic and optoelectronic devices. The epitaxial process has been traditionally studied through the lens of lattice-matched and chemically similar material systems, specifically the III-V quaternary material systems. This work investigates the role energy and symmetry play at epitaxial interfaces for cases far different than those of typical epitaxy. In the realm of energy, the impact of chemically dissimilar epitaxial interfaces was investigated, specifically between semiconductors and oxides, noble metals and oxides, and polar-on-nonpolar epitaxy. For symmetry at epitaxial interfaces, the role of symmetry breaking, through ...

Energy Provisioning In Stand-Alone And Grid-Connected Solar Powered Networks, Mohammad Sheikh Zefreh

Open Access Dissertations and Theses

Solar energy is a clean and abundant renewable energy source which is currently used in many types of photovoltaic (PV) designs. In practical PV systems, solar panels are used to harvest solar energy and convert it into a usable form of electricity. Due to the intermittent nature of solar energy input however, battery storage, in combination with solar panels, must be used to provide an uninterrupted source of power.

The process of assigning solar panel and battery configurations for a PV system is referred to as energy resource provisioning. Unfortunately, energy provisioning costs are still relatively high, and this is ...

External-Rotor 6/10 Switched Reluctance Motor For An Electric Bicycle, Jianing Lin

Open Access Dissertations and Theses

As a cost-effective, healthy, and environmentally friendly personal mode of transportation, electric bicycles (E-bikes) are gaining an increasing market share from conventional bicycles and automobiles. Considering the legal rules in Ontario, Canada, a 500W motor makes the E-bike more attractive for travelling use. At the same time, the simple structure, high torque and power density, as well as the low cost of the switched reluctance machine (SRM) makes it a strong candidate for E-bikes.

In this thesis, a 3-phase, external-rotor SRM with 6 stator poles and 10 rotor poles is designed for E-bike. The design of an external rotor arrangement ...

Study Of Passive Optical Network (Pon) System And Devices, Qingyi Guo

Open Access Dissertations and Theses

The fiber-to-the-x (FTTX) has been widely investigated as a leading access technology to meet the ever growing demand for bandwidth in the last mile. The passive optical network (PON) provides a cost-effective and durable solution. In this thesis, we investigate different aspects of the PON, in the search for cost-effective and high-performance designs of link system and devices.

In Chapter 2, we propose a novel upstream link scheme for optical orthogonal frequency division multiplexing (OOFDM)-PON. The colorless laser diodes are used at the optical network units (ONUs), and the overlapped channel spectrum of orthogonal subcarrier multiplexing provides high spectral ...

Model-Iq: Uncertainty Propagation From Sensing To Modeling And Control In Buildings., Madhur Behl, Truong Nghiem, Rahul Mangharam

Real-Time and Embedded Systems Lab (mLAB)

A fundamental problem in the design of closed-loop Cyber-Physical Systems (CPS) is in accurately capturing the dynamics of the underlying physical system. To provide optimal control for such closed-loop systems, model-based controls require accurate physical plant models. It is hard to analytically establish (a) how data quality from sensors affects model accuracy, and consequently, (b) the effect of model accuracy on the operational cost of model-based controllers. We present the Model-IQ toolbox which, given a plant model and real input data, automatically evaluates the effect of this uncertainty propagation from sensor data to model accuracy to controller performance. We apply ...

Section 2: Renewable Energy Resources, Asadollah Kazemi

Dr. ASADOLLAH KAZEMI

No abstract provided.

Section 1: Renewable Energy Resources, Asadollah Kazemi

Dr. ASADOLLAH KAZEMI

No abstract provided.

Battery Free Wireless Sensor Networks: Theory And Applications, Ali Abedi

WiSe-Net Laboratory

One of the major hurdles in wide spread use of wireless sensor networks is power consumption, i.e., the battery limitations. For several years, researchers tried to minimize power consumption of wireless nodes by designing more efficient data collection, transmission, storage, and processing methods. In this position paper, we will review the paradigm changing battery-free wireless sensing, which was originally designed for monitoring NASA’s inflatable lunar habitat and ended up being commercialized for monitoring jet engines, brain injury detection, and indoor navigation. Theory and practical applications presented in this paper will cover basic research in a University lab to ...

A 1 Gs/S, 31 Mhz Bw, 76.3 Db Dynamic Range, 34 Mw Ct-Δσ Adc With 1.5 Cycle Quantizer Delay And Improved Stf, Sakkarapani Balagopal, Kehan Zhu, Vishal Saxena

Electrical and Computer Engineering Faculty Publications and Presentations

A 1 GS/s continuous-time delta-sigma modulator (CT- ΔΣM) with 31 MHz bandwidth, 76.3 dB dynamic range and 72.5 dB peak-SNDR is reported in a 0.13 μm CMOS technology. The design employs an excess loop delay (ELD) of more than one clock cycle for achieving higher sampling rate. The ELD is compensated using a fast-loop formed around the last integrator by using a sample-and-hold. Further, the effect of this ELD compensation scheme on the signal transfer function (STF) of a feedforward CT- ΔΣ architecture has been analyzed and reported. In this work, an improved STF is achieved ...

Frictions Collaborative Creation Of Knowledge Vs. Practices In Trade And Commerce: The Example Of Open Hardware, Peter Troxler, Dannie Jost

Dannie Jost

In the first part of this article – frictions – we elaborate on the shift from hierarchical to lateral, networked structures in various fields. Specifically, we address the fields of software, content, design, electronics, manufacturing, and services. In all these fields we find various types of frictions between new structures and approaches and traditional ways of working with intellectual assets. Such frictions are valuable aids to understanding the shifts that are happening in society and they pinpoint areas where new practices are needed or are already under development.

In the second part – open hardware at CERN – we focus on one field in ...

An Accurate Offline Phasor Estimation Technique For Fault Location In Series Compensated Lines, Rubeena Rubeena

University of Western Ontario - Electronic Thesis and Dissertation Repository

In series compensated transmission lines, current and voltage signals measured by the line protection system include considerable sub-synchronous frequency components (SSFCs) which are not sufficiently damped within a typical fault clearing time of line protection system. This does not allow accurate phasor estimation and thereby phasor-based fault location. This paper presents an accurate algorithm which effectively filters out the unwanted frequency components and noise to perform accurate phasor estimation for fault location in series compensated transmission lines. Phasor estimation of a theoretical signal is first evaluated using the proposed method, Direct-Prony analysis and 4-cycle discrete Fourier transform algorithm. Then, various ...

Algorithms To Improve Performance Of Wide Area Measurement Systems Of Electric Power Systems, Sarasij Das

University of Western Ontario - Electronic Thesis and Dissertation Repository

Power system operation has become increasingly complex due to high load growth and increasing market pressure. The occurrence of major blackouts in many power systems around the world has necessitated the use of synchrophasor based Wide Area Measurement Systems (WAMS) for grid monitoring. Synchrophasor technology is comparatively new in the area of power systems. Phasor measurement units (PMUs) and phasor data concentrators (PDCs) are new to the substations and control centers. Even though PMUs have been installed in many power grids, the number of installed PMUs is still low with respect to the number of buses or lines. Currently, WAMS ...

Correlation Between Energy Distribution Profile And Lev El Of Consciousness, D. K. Chaturvedi Dr.

D. K. Chaturvedi Dr.

The purpose of this experimental study was to determine the energy levels corresponding to the different focal points (Chakras or centers) of the body, which is related with consciousness. In this experiment, the energy level is measured at four different centers, namely, the navel center, the heart center, the throat center and the eye center of the Human beings. The measurements have been taken using Energy Measurement System (EMS) developed at Department of Electrical Engineering, Dayalbagh Education Institute, Dayalbagh, Agra, India, which works on the principle of tissue resistance of body. The probe was placed at different centers and subsequent ...

Hybrid Data Storage Framework For The Biometrics Domain, Abhinav Tiwari

University of Western Ontario - Electronic Thesis and Dissertation Repository

Biometric based authentication is one of the most popular techniques adopted in large-scale identity matching systems due to its robustness in access control. In recent years, the number of enrolments has increased significantly posing serious issues towards the performance and scalability of these systems. In addition, the use of multiple modalities (such as face, iris and fingerprint) is further increasing the issues related to scalability. This research work focuses on the development of a new Hybrid Data Storage Framework (HDSF) that would improve scalability and performance of biometric authentication systems (BAS). In this framework, the scalability issue is addressed by ...

Fluctuations In Transient Response Of Adsorption-Based Plasmonic Sensors, Zeljko D. Cupic

Zeljko D Cupic

The basic parameters of a sensor element defining its ultimate performance are sensitivity and intrinsic noise. In plasmonic gas sensors both are determined by refractive index changes due to adsorption and desorption (a–d) of target analyte particles to the sensor active area. In this paper we present a general model that can be simultaneously used to determine sensitivity and intrinsic noise of a plasmonic sensor both during transients and in steady-state and is valid for multi-analyte environments. The model utilizes the conventional probabilistic approach. It is derived without any assumptions about the stochastic nature of the fundamental (a–d ...