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 20 of 20 for “"sense and avoid"”.
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Multirotor UAS Sense and Avoid with Sensor Fusion
… detection, dynamic obstacle state estimation, and avoidance strategy. This area is explored in pursuit of determining the viability of UAS Sense and Avoid (SAA) in static and dynamic operational environments. This exploration is driven by dynamic simulation and post-processing of real-world …
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Multichannel Sense and Avoid Radar for Small UAVs
… the feasibility of creating a multichannel sense and avoid radar system for small fixed-wing UAVs (also known as sUAS or drones). The target sUAS is a 40% Yak-54 remote controlled aircraft with a typical payload of 10 lbs. Small UAS’s such as these are increasing in popularity for both …
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Designing a Multichannel Sense-and-Avoid Radar for Small UASs
This thesis presents the design, analysis and test results of a 1.445 GHz Frequency-Modulated Continuous Wave (FMCW) collision-avoidance radar for Unmanned Aircraft Systems (UASs). This radar system is being developed by the department of Electrical Engineering (EE) in coordination with the …
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Radar Detection, Tracking and Identification for UAV Sense and Avoid Applications
… the "line of sight" restriction, for hobbyists and commercial applications. Improving sensor technology for Sense And Avoid (SAA) systems is currently a major research area in the unmanned vehicle community. This thesis overviews efforts made to advance intelligent algorithms used to detect, …
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UAV collision avoidance: a specific acceleration matching approach
… required for this to occur is an adequate sense and avoid system to enable the UAV to detect threat aircraft and take evasive action if required. This thesis investigates a collision avoidance system to satisfy a significant portion of the requirements for sense and avoid. It was …
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Ultra-wideband radar for robust inspection drone in underground coal mines
… coal mine, with high levels of coal dust and humidity that can obstruct many conventional sensing methods. For high functionality, the drone must sense and avoid potential obstacles and as well as inspect and map the mining wall face. The objective of this paper is to present …
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Considerations for domestic law enforcement implementation of a UAS program in the proposed FAA regulatory environment of integration into the national airspace system
… the author reviews current academic literature and provides analysis on key policy issues of safety, the transfer of risk, and constitutional rights. Then, the author consults the knowledge and experience of individuals responsible for the integration architecture of UAS through an IRB-approved …
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Value of Machine Learning and Cognition on Target Tracking
… spectrum has been opened to civilian and industrial access in the United States. Because of this, high priority users such as the military and government need to develop systems that can adapt to the surrounding spectral environment which will suddenly be filled with new users. This …
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Ranging of Aircraft Using Wide-baseline Stereopsis
… of ranging aircraft, specifically as a possible sense-and-avoid solution in Unmanned Aerial Systems. Two studies were performed: the first was an experimental pilot study to examine the ability of humans to range in-flight aircraft and the second a wide-baseline study of stereopsis to range …
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Modeling Aircraft Position and Conservatively Calculating Airspace Violations for an Autonomous Collision Awareness System for Unmanned Aerial Systems
… (FAA) is concerned with UAS capabilities to sense and avoid conflicts. Since the operator is outside the cockpit, the proposed collision awareness plugin (CAPlugin), based on probability and error propagation, conservatively predicts potential conflicts with other aircraft and airspaces, thus …
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Three-Dimensional, Vision-Based Proportional Navigation for UAV Collision Avoidance
… obstacles also increases. Therefore, collision avoidance is an important challenge to overcome for Unmanned Aerial Vehicle operations. Electro-optical devices have several advantages such as light weight, low cost, low algorithm requirements with respect to computational power and possibly night …
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Sensor Fusion and Obstacle Avoidance for an Unmanned Ground Vehicle
<p>In recent years, the capabilities and potential value of unmanned autonomous systems (UAS) to perform an extensive variety of missions have significantly increased. It is well comprehended that there are various challenges associated with the realization of autonomous operations in complex urban …
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Deep Recurrent Q Networks for Dynamic Spectrum Access in Dynamic Heterogeneous Envirnments with Partial Observations
… traditional DSA approaches such as simple "sense-and-avoid" fail to provide sufficient performance in many scenarios. Thus, the combination of sensing with deep reinforcement learning (DRL) has been shown to be a promising alternative to previously proposed simplistic approaches. DRL does …
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Application of multiple unmanned aircraft systems (UAS) for bushfire mitigation
When a disaster threatens lives and livelihoods, emergency responders require high resolution, near-real-time, accurate data about the impact of the disaster to aid them during the response and decision making phases. Currently in the case of bushfires disaster response services rely on …
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Collision Avoidance and Navigation of UAS Using Vision-Based Proportional Navigation
… interest due to their light weight, low cost, and low algorithm requirements with respect to computational power. In this thesis, vision-based guidance laws are developed to provide sense and avoid capabilities for unmanned aerial vehicles (UAVs) operating in complex environments with multiple …
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Safe navigation and motion coordination control strategies for unmanned aerial vehicles
… have become very popular for many military and civilian applications including in agriculture, construction, mining, environmental monitoring, etc. A desirable feature for UAVs is the ability to navigate and perform tasks autonomously with least human interaction. This is a very challenging …
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Mining Aircraft Telemetry Data With Evolutionary Algorithms
… (GPAR-RMS) was a</p> <p>mobile ground-based sense-and-avoid system for Unmanned Aircraft System (UAS)</p> <p>operations developed by the University of North Dakota. GPAR-RMS detected proximate</p> <p>aircraft with various sensor systems, including a 2D radar and an Automatic Dependent</p> …
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Structural Studies of the Cold and Menthol Sensing Ion Channel TRPM8
<p>The ability to sense and avoid detrimental harm from the environment is key to survival of organisms. In mammals, nociceptive neurons detect potentially damaging stimuli from the external environment, convert them into electrical signals, and elicit pain sensations in higher nerve center inside …
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Obstacle Avoidance for Small Unmanned Air Vehicles
… identified. This research presents an obstacle avoidance system for small UAVs. First, a mission waypoint path is created that avoids all known obstacles using a genetic algorithm. Then, while the UAV is in flight, obstacles are detected using a forward looking, onboard camera. Image features …