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Full-Text Articles in Engineering

Unmanned Vehicles Formation Control In 3d Space And Cooperative Search, Saba Ramazani Jul 2016

Unmanned Vehicles Formation Control In 3d Space And Cooperative Search, Saba Ramazani

Doctoral Dissertations

The first problem considered in this dissertation is the decentralized non-planar formation control of multiple unmanned vehicles using graph rigidity. The three-dimensional formation control problem consists of n vehicles operating in a plane Q and r vehicles that operate in an upper layer outside of the plane Q. This can be referred to as a layered formation control where the objective is for all vehicles to cooperatively acquire a predefined formation shape using a decentralized control law. The proposed control strategy is based on regulating the inter-vehicle distances and uses backstepping and Lyapunov approaches. Three different models, with increasing level ...


Curipilot, Gregory Cusack, Karan Daryanani, Nathaniel Tucker Jun 2016

Curipilot, Gregory Cusack, Karan Daryanani, Nathaniel Tucker

Interdisciplinary Design Senior Theses

The drone industry has rapidly grown over the last three years and many large companies have determined that the phenomenon is worth investing in. Recently, Intel has shown interest in this growing industry. Intel developed a next generation processor to be used in drones in addition to investing in the Chinese drone hardware company, Yuneec. Contracted by Intel, the CuriPilot team laid the foundation for linking the hardware and software layers of Intel's drone technology by designing the stabilization control system for the next generation of processors and drones. The CuriPilot team built a foundation for future drone development ...


Bringing Electricity To Alafiarou: The Solar Microgrid Project, Nicolas Metais, Jacob Leatherberry Jun 2016

Bringing Electricity To Alafiarou: The Solar Microgrid Project, Nicolas Metais, Jacob Leatherberry

Electrical Engineering Senior Theses

Despite the great technological advancements and discoveries that have been made throughout the last century, 1.2 billion people still live without access to electricity, 95% of which live in Sub-Saharan Africa and developing Asia.1 In this paper, we discuss how we designed and implemented a self-sustaining, affordable and highly replicable solar microgrid in order to accelerate the electrification of rural communities in the most environmentally conscious way possible. Our project focused on developing a microgrid for a small community of 10 households in rural Benin that previously had no access to electricity. We travelled to this village in ...


Pcb Prototyping, Kasey Chun, Dylan Hack, Ilja Medan, Michael Rudolf, Ryan Sidley Jun 2016

Pcb Prototyping, Kasey Chun, Dylan Hack, Ilja Medan, Michael Rudolf, Ryan Sidley

Interdisciplinary Design Senior Theses

In today’s world, Printed Circuit Boards, also known as PCBs, are part of our daily lives. However, it is currently difficult for students in university classes or hobbyists to quickly produce custom made PCBs since no system exists where every step in the production process is on one platform. There are four main steps that go into manufacturing a PCB once it is fully designed which are: milling, solder dispensing, component placement, and a reflow process. The goal will be to create various toolheads and place them onto a single platform allowing the user to perform the aforementioned production ...


Reactive Power Compensation, Kimberly Meyers, Martin Prado Jun 2016

Reactive Power Compensation, Kimberly Meyers, Martin Prado

Electrical Engineering Senior Theses

Reactive power compensation serves to increase the power factor of large industrial loads and increase the efficiency of power transmission. In doing so, reactive power compensation decreases overall energy consumption and has lasting economic and environmental impacts. This paper discusses a simulation to model power consumption in a multitude of different loads, which gives industrial consumers a solution to increase the power factor of their systems to a more desirable level. The MATLAB simulation that we built successfully calculates and displays how much energy can be saved and it shows how that energy can be saved. If physical implementations of ...


Navigation And Illumination For Skateboards, Nathan Depew Jun 2016

Navigation And Illumination For Skateboards, Nathan Depew

Electrical Engineering Senior Theses

Skateboarding is not a hobby for the faint of heart. It is a treacherous mode of transportation. One small stone could lead to a face plant. These dangers are magnified at night, when previously visible objects become practical invisible. There is also the issue of distracted skating. Just like distracted driving leads to accidents, distracted skating can result in similar problems. When a skateboarder is distracted, the safety issues inherent in skateboarding are magnified and reaction time slows.

The most perilous time this is when skateboarders are skating while distracted at night. Although the simple answer would be to put ...


Marv: Marine Autonomous Research Vessel, Drew Azevedo, Sam Beltram, Gregorio Delvecchio, Ben Hopner Jun 2016

Marv: Marine Autonomous Research Vessel, Drew Azevedo, Sam Beltram, Gregorio Delvecchio, Ben Hopner

Interdisciplinary Design Senior Theses

Conducting hydrologic research in remote areas is currently performed manually, making it a labor intensive and inaccurate solution. Due to the size, weight, and cost of automated solutions on the market today, a need has arisen for a low cost, highly portable, autonomous solution. Working closely with Santa Clara University’s Robotics Systems Lab (RSL), our team has developed a low cost, highly portable autonomous marine research vessel named MARV (Marine Autonomous Research Vessel). It is an autonomous surface platform where scientists outfit the vessel with their own data acquisition equipment. The mechanical chassis is collapsible for modes of remote ...


Fast Calculation Of Thévenin Equivalents For Real-Time Steady State Voltage Stability Estimation, Jorge Alberto Vélez Vásquez Jan 2016

Fast Calculation Of Thévenin Equivalents For Real-Time Steady State Voltage Stability Estimation, Jorge Alberto Vélez Vásquez

Graduate Theses and Dissertations

The purpose of this work is to present a novel approach to quickly update Thévenin equivalents of multi nodal systems, which can be used to calculate long-term Voltage Stability Margins (VSMs) in real-time applications considering n-k contingencies in the grid. To accomplish this, a derivation of Thévenin equivalent parameters of a multi-port system is proposed, which are expressed in terms of the parameters of the Zbus of the network. Then, by using the matrix inversion lemma and Kron reductions, a new methodology to quickly update the Zbus of the system when n-k contingencies occur is explained. The speed of this ...


Accurate Spectral Testing Without Accurate Instrumentation, Li Xu Jan 2016

Accurate Spectral Testing Without Accurate Instrumentation, Li Xu

Graduate Theses and Dissertations

Analog-to-digital converters (ADCs) are becoming increasingly common in many systems in integrated circuits. Spectral testing is widely used to test the dynamic linearity performance of ADCs and waveform generators. With improvements in the performance of ADCs, it is becoming an expensive and challenging task to perform spectral testing using standard methods because of the requirement that the test instrumentation environment must satisfy several stringent conditions. In order to address these challenges and to decrease the test cost, in this dissertation, four new algorithms are proposed to perform accurate spectral testing of ADCs by relaxing three conditions required for standard spectral ...


Dual-Frequency Dual-Inductor Multiple-Outputs (Df-Dimo) Buck Converter Topologies With Fully-Integrated Output Filters, Yongjie Jiang Jan 2016

Dual-Frequency Dual-Inductor Multiple-Outputs (Df-Dimo) Buck Converter Topologies With Fully-Integrated Output Filters, Yongjie Jiang

Graduate Theses and Dissertations

In multi-core DSPs, there is a need for multiple independent power supplies to power the digital cores. Each power supply needs to have fast dynamic response and must support a wide range of output voltage with up to hundreds of mA load current. In this dissertation, the key performance metrics in power converter design are introduced, the advantages and dis-advantages of the conventional power converter topology are analyzed and a new Dual-Frequency Dual-Inductor Multiple-Output (DF-DIMO) buck converter topology is presented to improve the limitations of the conventional topologies. The proposed topology employs a dual-phase 20-MHz current-mode-controlled input stage to reduce ...


Microfluidic Devices For High-Throughput Plant Phenotyping And Bioenergy Harvesting From Microbes And Living Plants, Huawei Jiang Jan 2016

Microfluidic Devices For High-Throughput Plant Phenotyping And Bioenergy Harvesting From Microbes And Living Plants, Huawei Jiang

Graduate Theses and Dissertations

Microfluidics and micro/nanofabrication techniques provide powerful technological platforms to develop miniature bioassay devices for studying cellular and multicellular organisms. Microfluidic devices have many advantages over traditional counterparts, including good throughput due to parallel experiments, low infrastructural cost, fast reaction, reduced consumption of agent and reagent, and avoidance of contamination. This thesis is focused on the development of a microfluidic toolkit with several miniature devices to tackle important problems that the fields of plant phenotyping and bioenergy harvesting are facing. The ultimate goal of this research is to realize high-throughput screening methods for studying environment-genomics of plants through phenomics, and ...


Micro-Electro-Opto-Fluidic Systems For Biomedical Drug Screening And Electromagnetic Filtering And Cloaking Applications, Peng Liu Jan 2016

Micro-Electro-Opto-Fluidic Systems For Biomedical Drug Screening And Electromagnetic Filtering And Cloaking Applications, Peng Liu

Graduate Theses and Dissertations

Microfluidic is a multidisciplinary field that deals with the flow of liquid inside micro-meter size channels. In order to be considered as microfluidics, at least one dimension of the channel should be in the range of one micrometer or sub-millimeter. Microfluidic technology includes designing, manufacturing, formulating devices and processing the liquid. As numerous bio-science and engineering techniques have utilized microfluidics and highly integrated with this remarkable technology, the microfluidic platform technology has extended to several sub-techs: micro-scale analysis, soft-lithography fabrication, polymer science and processing, on-chip sensing and micro-scale fluid manipulation. Those sub-techs have been developed rapidly along with the booming ...


Probabilistic Insertion, Deletion And Substitution Error Correction Using Markov Inference In Next Generation Sequencing Reads, Vahid Noroozi Jan 2016

Probabilistic Insertion, Deletion And Substitution Error Correction Using Markov Inference In Next Generation Sequencing Reads, Vahid Noroozi

Graduate Theses and Dissertations

Error correction of noisy reads obtained from high-throughput DNA sequencers is an important problem since read quality significantly affects downstream analyses such as detection of genetic variation and the complexity and success of sequence assembly. Most of the current error correction algorithms are only capable of recovering substitution errors. In this work, Pindel, an algorithm that simultaneously corrects insertion, deletion and substitution errors in reads from next generation DNA sequencing platforms is presented. Pindel corrects insertion, deletion and substitution errors by modelling the sequencer output as emissions of an appropriately defined Hidden Markov Model (HMM). Reads are corrected to the ...


Green Cooperative Spectrum Sensing And Scheduling In Heterogeneous Cognitive Radio Networks, Abdulkadir Celik Jan 2016

Green Cooperative Spectrum Sensing And Scheduling In Heterogeneous Cognitive Radio Networks, Abdulkadir Celik

Graduate Theses and Dissertations

The motivation behind the cognitive radio networks (CRNs) is rooted in scarcity of the radio spectrum and inefficiency of its management to meet the ever increasing high quality of service demands. Furthermore, information and communication technologies have limited and/or expensive energy resources and contribute significantly to the global carbon footprint. To alleviate these issues, energy efficient and energy harvesting (EEH) CRNs can harvest the required energy from ambient renewable sources while collecting the necessary bandwidth by discovering free spectrum for a minimized energy cost. Therefore, EEH-CRNs have potential to achieve green communications by enabling spectrum and energy self-sustaining networks ...


Ultra-Small Low Power Temperature-To-Digital Converter And Verification Methods Of Analog Circuit With Trojan States, Yen-Ting Wang Jan 2016

Ultra-Small Low Power Temperature-To-Digital Converter And Verification Methods Of Analog Circuit With Trojan States, Yen-Ting Wang

Graduate Theses and Dissertations

Accurate, small and low-power CMOS temperature sensors designed for multi-position temperature monitoring of power management in multi-core processors are proposed. The temperature sensors utilize the temperature characteristics of the threshold voltage of a MOS transistors to sense temperature and are highly linear from 60°C to 90°C. This is the temperature range needed for the power management applications where temperature sensors are strategically placed at multiple locations in each core to protect the processor from temperature-induced reliability degradation. A temperature-to-digital converter (TDC) that does not require either a reference generator or an ADC is also introduced, and it exhibits ...


Rf Cmos Band Pass Filters With Wide Tuning Frequency, Controllable Pass Band And High Stopband Rejection: Using Passive And Active Inductors, Jian Chen Jan 2016

Rf Cmos Band Pass Filters With Wide Tuning Frequency, Controllable Pass Band And High Stopband Rejection: Using Passive And Active Inductors, Jian Chen

Browse all Theses and Dissertations

With the increasing demand for high performance RF front-end modules, like multimedia handset and base station devices accommodating multiple wireless standards (2G, 2.5G, 3G, WiMAX, and LTE). Multiple IF amplifiers, mixers, RF band pass filters (BPFs), modulators and demodulators are desired to be tunable to meet dynamic standards with different frequency bands. Tunable devices with wide tuning frequency range, tuning speed, high linearity, energy conservative, high pass band gain, high stop band rejection are the paramount components in the reconfigurable RF front-end systems. In this dissertation, first a wide tuning passive inductor band pass filter (BPF) with steep roll-off ...