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 12 of 12 for “"String stability"”.
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Stability and String Stability Analysis of Formation Control Architectures for Platooning.
This thesis presents theoretical results for stability and string stability of formation control architectures for platooning. We consider three important interconnection topologies for vehicles travelling in a straight line as a string: leader following, cyclic and bidirectional. For the leader …
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Design of Switching Strategy for Adaptive Cruise Control Under String Stability Constraints
… safe distance during transient process. String stability issue has been addressed by many researchers after the adaptive cruise control (ACC) concept was developed. The main problem is when many vehicles with ACC controller forming a vehicle platoon end to end, how the control algorithm …
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String Stable Constant-Spacing Platoon with Robustness to Communication Delays and Cutoff
This dissertation develops a string stable, constant-spacing control strategy for connectedautonomous vehicle networks with robustness to communication delays and cutoff. It is well-known that decentralized constant-spacing strategies cannot achieve string stability, which requires the error to …
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A Two-Dimensional Systems Stability Analysis of Vehicle Platoons
… 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 one after the …
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Optimized and energy-efficient cooperative platooning for autonomous vehicles
… with savings over 20% along with strongest string stability. This thesis provides insights into energy benefits that can be gained through energy-aware controllers working with information sharing in autonomous platooning, allowing for deeper insights relevant to Canadian transportation …
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Information Theory and Cooperative Control in Networked Multi-Agent Systems with Applications to Smart Grid
… which deal with short-term and long-term grid stability, power load balancing and energy routing. At microgrid level, under the assumption of user cooperation and inter-user communications, we propose a distributed networked control strategy to solve the demand-side management problem in …
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Analyzing the Impact of Wireless Multi-Hop Networking On Vehicular Safety
… a realistic car following model and used string stability analysis as a metric for measuring vehicle safety. The basic idea is to exploit the small network propagation time in disseminating safety messages over large distances, instead of relying on just the predecessor vehicle's state. …
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Safety and feasibility of a cloud-based architecture for multi-vehicle system
… the initial deployment of low latency solution. String stability model showed that significant reduction in probability of accidents is possible even at low penetration rates of the solution. The solution's operational cost analysis also concludes that a limited deployment on commercial vehicles …
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Impacts of vehicle automation on traffic flow stability
… such as phantom traffic jams, or traffic stability. This dissertation has four main contributions: (i) experimental evidence to validate that human driving behavior alone is sufficient for the development of phantom jams, (ii) theoretical work as well as experimental work to demonstrate …
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Emergency Braking in Compact Vehicle Platoons: A Cyber-Physical Design
… control systems developed so far aim to achieve string stability in the cruise scenario, i.e., to prevent that small variations at the lead magnify towards the trail. Unfortunately, this has no relevance during emergency braking, since control systems incur saturation, i.e., the condition where …
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Trajectory Tracking Control of Unmanned Ground Vehicles using an Intermittent Learning Algorithm
Traffic congestion and safety has become a major issue in the modern world's commute. Congestion has been causing people to travel billions of hours more and to purchase billions of gallons of fuel extra which account to congestion cost of billions of dollars. Autonomous driving vehicles have been …
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Modeling and Analysis of a Moving Conductive String in a Magnetic Field
… physical systems are modeled as axially moving strings; such examples are belts, tapes, wires and fibers with applied electromagnetic fields. In this study, we propose a model that describes the motion of a current-carrying conductive string in a lateral magnetic field, while it is being pulled …