Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"Hardware Testbed"”.
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A hardware testbed for measuring IEEE 802.11g DCF performance
The Distributed Coordination Function (DCF) is the oldest and most widely-used IEEE 802.11 contention-based channel access control protocol. DCF adds a significant amount of overhead in the form of preambles, frame headers, randomised binary exponential back-off and inter-frame spaces. Having …
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Hardware Testbed for Relative Navigation of Unmanned Vehicles Using Visual Servoing
… the control systems are designed to operate. A hardware testbed that can simulate the complex relative motion of many different relative navigation problems is being developed. This testbed simulates near-planar relative motion by using software to prescribe the motion of an unmanned ground …
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Hardware-in-the-loop platform for the coordination of distributed energy resources to provide frequency regulation services
… stability in the grid. This thesis presents a hardware-in-the-loop platform for testing the effectiveness of different coordination schemes for providing frequency regulation services. While coordination of these DERs is usually done in a centralized manner, in our testbed we aim to show the …
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Scalable network localization
… system comprises two major components: a hardware testbed; and a suite of distributed real-time algorithms to solve the highly interrelated problems of Node Prioritization, Node Activation, and Node Localization. Each node in the hardware testbed is a low-cost business card-sized device, …
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Robust implementation of algorithms for distributed generation control of small-footprint power systems
… links are imperfect. Next, the development of a hardware testbed comprised of low-complexity devices equipped with wireless transceivers that implements the algorithms is described. We conclude by illustrating the efficacy of the algorithms by utilizing the hardware testbed to control the …
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Design of a multi-module multi-phase battery charger for the NASA EOS space platform testbed
… by the use of the Space Platform Power System Hardware Testbed. The testbed utilizes battery and solar array simulators which allow for realistic battery charger testing.
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Testing of Current-Only Directional Relay Algorithm in a Realistic Distribution Network Testbed
… a complete description of how to implement a hardware testbed to review the CODR method. Findings show that CODR performs successfully in a real environment, but its algorithm needs to be upgraded if used in distribution systems where lines have a non-negligible resistive component.
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Observer based fault detection in DC-DC power converters
… of such filters by testing them in a hardware testbed. This testbed is comprised of a dc-dc buck converter. The detection filters for monitoring the health of the components in this dc-dc converter, as well as the converter controls, are implemented in a low-cost DSP. Using a lossy …
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A Real-Time Server Based Approach for Safe and Timely Intersection Crossings
… was validated in simulations and on a realistic hardware testbed with robots mimicking human driving behaviors. Compared to the pre-timed traffic control and an adaptive scheduling based traffic control, our algorithm is able to avoid spillbacks under highly dynamic traffic conditions and improve …
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Energy-Constrained UAV-UGV Cooperative Systems: A Bilevel Framework for Routing in Multi-Agent Teams
… To validate the framework, we developed a hardware testbed comprising a DJI Tello UAV and a Raspberry Pi-based UGV in a lab-scale environment. Using motion capture for localization and synchronized wireless communication, the UAV successfully landed on a moving UGV for recharging, …
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Fast star tracker centroid algorithm for high performance CubeSat with air bearing validation
… time by a factor of 10 with a novel air bearing hardware testbed. This thesis also develops a high fidelity optical imager model in MATLAB Simulink. This model can be used to test centroiding algorithms and to simulate optical systems in a spacecraft pointing simulator. The model is validated …
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Value of information based distributed inference and planning
… better performance than decoupled approaches. A hardware testbed is developed to demonstrate the performance improvements of the coupled approach in context of distributed planning with uncertain target classifications.
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Two-stage path planning approach for designing multiple spacecraft reconfiguration maneuvers and application to SPHERES onboard ISS
… and Reorient Experimental Satellites (SPHERES) hardware testbed onboard the International Space Station (ISS). The maneuvers were designed using two different two-stage algorithms presented in this work. It also discusses the lessons learned from these tests, and the recommendations to improve …
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A Hands-on Modular Laboratory Environment to Foster Learning in Control System Security
… measures implemented in the system. A mock testbed environment is created using commercial-off-the-shelf hardware to address the unique aspects of a CPS, and serve as a cybersecurity trainer for students from control system or IT backgrounds. The modular nature of this courseware, which uses …
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Modeling, Analysis, and Design of Distributed Power Electronics System Based on Building Block Concept
… electronics system the same as the modularized hardware and perform time domain simulations with very fast speed. Further more, even though the system is modeled based on modularized concept on the ABC coordinates, it can be used to perform small signal analysis on the DQ coordinates as well. …
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Design and Demonstration of a DAB Based RadCom System
… The goal of this system is to use a single hardware platform to transmit a standards based waveform, that can be used for both radar and communication applications simultaneously in a symbiotic nature. The development of the RadCom system was therefore divided into four sub-systems. This …
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Addressing the hidden terminal problem in MU-MIMO WLANs with relaxed zero-forcing approach
… legacy standards) and feasible with existing hardware, is lacking to the best of our knowledge. In this thesis, we propose a solution for the HT problem which has three fundamental attributes. First, a) at the Physical (PHY) layer, the Zero-forcing (ZF) transmission strategy with fairness and …
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Design and Validation of Hardware-in-the-Loop Testbed for Proximity Operations Payloads
<p>The research presented here is a new testbed design for CubeSat and payload testing and development. This research demonstrates a low-cost, hardware-in-the-loop testing apparatus for use with university CubeSat programs for testing throughout the different levels of the development process. The …