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 34 for “"platoons"”.
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A Two-Dimensional Systems Stability Analysis of Vehicle Platoons
The main contributions of this dissertation are in the field of stability analysis of linear and nonlinear two-dimensional systems. The study of stability of such systems is motivated by the “string stability” or “platooning” problem: In order to achieve tighter spacing between vehicles travelling …
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Impact of platoons on connected commercial corridors in Illinois
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-12-01
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Design of a cooperative overtaking algorithm for platoons on freeways
… such a cooperative overtaking algorithm for platoons on freeways. The algorithm can decide, depending on the traffic situation, whether it is possible, useful, and safe to overtake. If that is the case, it executes the overtaking maneuver cooperatively without splitting up the platoon. The …
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Emergency Braking in Compact Vehicle Platoons: A Cyber-Physical Design
… autonomous driving, concepts like road trains or platoons are becoming more popular. In these arrangements, vehicles travel at separations of only 5 to 10m between them. These short inter-vehicle distances allow compacting vehicle flows resulting in increased throughput on highways. In addition, …
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SAFE REINFORCEMENT LEARNING-BASED GREEN LIGHT OPTIMAL SPEED ADVISORY FOR MIXED-TRAFFIC PLATOONS
This thesis develops a platoon-centric, safe RL-based Green Light Optimal Speed Advisory (GLOSA) system to optimize the CAV speed profile of a mixed-traffic platoon. First, we design a multi-agent RL algorithm to achieve a balance between the energy and travel efficiency of a mixed-traffic platoon, …
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Optimization of lateral position of autonomous truck platoons to improve roadway infrastructure sustainability
… lateral position of each platoon (or group of platoons on each day or week). In the centralized strategy, the fuel efficiency of trucks is maximized because the trucks in a single platoon are still perfectly aligned. However, applying a centralized strategy may require significant investment …
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Design of and Decentralized Path Planning for Platoons of Miniature Autonomous Underwater Vehicles
… schemes for land-based or air-based groups, or platoons, of autonomous vehicles cannot be implemented in underwater applications because of their dependence upon high-bandwidth communication. In current strategies for controlling groups of autonomous underwater vehicles (AUVs), platoon size …
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Utilizing High Resolution Data to Identify Minimum Vehicle Emissions Cases Considering Platoons and EVP
… to analyze the traffic data and to identify platoons. The platoon end time was obtained from the simulation and used to calculate the offset of the downstream intersection. The simulation calculates vehicle emissions with the aid of the VT-Micro microscopic emission model. Optimization …
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External communication displays for connected truck platoons in mixed traffic : a federated simulator study
… to investigate the communication between truck platoons and surrounding traffic, a similar model is proposed in this study. The scenario examined in this study involves trucks forming a truck platoon. Two different external displays in addition to a control display were evaluated for how …
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Communication Protocol Design Considerations For Highway Vehicle Platoons And Enhanced Networked Robustness By Stochastic Dithers
… vehicle coordination and communications in platoons. Typical communication</p> <p>standards and related communication latency and package loss are used</p> <p>as benchmark cases in our study. These findings provide useful guidelines for information</p> <p>harmonization module (IHM) design in …
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Time Headway and Platooning Characteristics of Vehicles on Interstate Highways
… 15% to 85% of platooning vehicles were in large platoons. For left and right lanes, platoons led by heavy vehicles were moving at slower speeds than platoons led by light vehicles. Proportion of vehicles in platoon on right lane was significantly higher than that on left lanes. Proportions of …
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Behavioural adaption of drivers of unequipped vehicles to short time headways observed in a vehicle platoon
… interact with unequipped vehicle drivers (UVDs). Platoons of vehicles comprise a vision for future traffic and are designed to maintain small headways in order to have a beneficial effect on both energy consumption and traffic flow. The overarching aim of this work was to investigate whether the …
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Car Following and Dynamic Dilemma Zone Model for Determining Gate Operation Times Based on Driver Behavior at Highway-Rail Intersections
… the track zone for single vehicles as well as platoons of vehicles. A simulation model incorporating the field data, determination of a dynamic dilemma zone, and algorithms to determine gate operation times is developed and validated. The results from this approach yield four quadrant gate …
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Development of a Power System and Analysis of Inertial System Calibration for a Small Autonomous Underwater Vehicle
Compared to large vehicles acting individually, platoons of small, inexpensive autonomous underwater vehicles have the potential to perform some missions that are commonly conducted by larger vehicles faster, more efficiently, and at a reduced operational cost. This thesis describes the power …
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Understanding resilience in large networks
… may represent vehicles in the case of vehicular platoons, production sectors in the case of economic networks, banks in the case of financial sector, or people in the case of social networks. Due to interconnections between constituents in these networks, a disturbance to any one of the …
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Development of a Car -Following Model to Simulate Driver and Autonomous Intelligent Cruise Controlled Vehicular Traffic Flow
… INTELSIM algorithm provided stability in AICC platoons and performed well in a variety of traffic situations including stop-and-go conditions. AICC vehicles can provide volumes of up to 7400, 5200 and 3100 veh/hr at separation headways of 0.3, 0.5 and 1 sec, respectively, at speeds of 90 …
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String Stable Constant-Spacing Platoon with Robustness to Communication Delays and Cutoff
… achieve string stability in constant-spacing platoons. However, the benefits of introducing centralized control are questionable under communication limitations, like delays and cutoffs, which are common in modern traffic networks. Therefore, this thesis develops a new constant-spacing control …
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Disturbance Attenuation in Mass Chains with Passive Interconnection
… such as bidirectional control of vehicle platoons. It is shown that the scalar transfer functions from the disturbance to a given intermass displacement can be represented as a complex iterative map. This description is used to establish uniform boundedness of the $\mathcal{H}_\infty$-norm …
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'Destructive and formidable': British infantry firepower, 1642-1765
… such as the introduction of the organisation of platoons into firings. As well as identifying, for the first time, a single underlying tactical doctrine it has also been possible to clarify the manner in which the methods used to execute that doctrine changed.
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Design and protection algorithms for path level aggregation of traffic in WDM metro optical networks
… of Traffic in metrO Optical Networks (PLATOONs). The algorithms suggested here have three features: (1) accounts for four different path level aggregation strategies---namely, point to point (for example, lightpaths), point to multi-point (for example, source based light-trails), …
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