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 16 of 16 for “"Extremum Seeking Control"”.
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Extremum-Seeking Control of Industrial-Scale Fermentation Processes
… papers, both pertaining to perturbation-based control strategies in industrial fed-batch fermentation processes. The first paper describes a new control strategy for avoiding overflow metabolism in the exponential growth phase of a fermentation, based on analysis of the frequency spectrum of …
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Extremum seeking control of battery powered vapor compression systems for vehicles
… vehicle cooling. This thesis proposes the use of extremum seeking control (ESC), a class of real-time model-free optimization algorithms, to determine the optimal combination of system inputs that minimizes the VCS power consumption while meeting given objectives. In order to determine algorithm …
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Automated Regulation of LiDAR Detection Range with Model-Guided Extremum Seeking Control
… LiDAR detection range through a model-guided extremum seeking control (ESC) against the variation of ambient conditions. A neural network model is trained with experimental LiDAR data off-line to simulate the impact of ambient conditions, and an Environmental Index (EI) is proposed to classify …
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Enhancing heat pump efficiency using extremum seeking control: A MATLAB SimScape-based study
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2027-05-01
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Model free real-time optimization for vapor compression systems
… This thesis focuses on one such approach, extremum seeking control, which uses performance index measurements to determine optimal system settings. Forgoing system model knowledge and relying exclusively on data allows an optimization approach to function well on many different plants. …
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Integration of Extremum Seeking and Model Predictive Control for Discrete Time Systems
This thesis considers a time-varying extremum seeking control algorithm that adjusts set-points provided to a model predictive controller for a vapour compression system. While perturbation-based extremum seeking methods have been known for some time, they suffer from slow convergence rates---a …
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Real-time trajectory optimization for excavators by power maximization
In this work an algorithm for controlling the motion of an autonomous excavator arm during excavation is presented. To deal with the challenge, posed by modeling and planning trajectories through soil, a model-free method is proposed which aims at maximally harnessing the capabilities of the …
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Distributed Newton-Seeking for Resource Allocation
… (RTO) is a category of closed-loop process control techniques that is focused on the improvement of process performance. To develop effective strategies, models of the systems are usually required. To circumvent this issue, model-free techniques such as Extremum-seeking control (ESC) have …
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Analysis of Model-Free Control of Wind Farms Using Large-Eddy Simulations
… a decrease in power production. Wind farm control strategies aim at mitigating the effect of wake interactions. In this dissertation, model-free control strategies for wind farm power maximization have been evaluated using numerical simulations of the flow through wind farms. A model-free …
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Dynamic Modeling and Model-Free Real-Time Optimization for Cold Climate Heat Pump Systems
… However, there has been a lack of effective control strategies for such systems to maintain the optimal energy efficiency for operations across different combinations of ambient and load conditions. Previous work has paid great efforts in model based strategies, anchored on deriving system …
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Characterization and Control of Multi-Cylinder Partially Premixed Combustion
… combustion strategy to the demands on hardware, control and fuels for a realizable PPC solution. In summary it contains a thorough PPC characterization where the results suggest that high EGR, early injection PPC strategies are to prefer over late injection approaches or smokeless rich diesel …
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Shockless explosion combustion - Controlled autoignition in stratified mixtures for pressure gain combustion
… observations are subsequently used to apply an extremum seeking control algorithm which controls the cycle–averaged formation of different autoignition modes by optimizing the fuel injection profile. Optical and pressure measurements reveal a complex interaction between heat release and pressure …
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Direct Torque Control for Silicon Carbide Motor Drives
<p>Direct torque control (DTC) is an extensively used control method for motor drives due to its unique advantages, e.g., the fast dynamic response and the robustness against motor parameters variations, uncertainties, and external disturbances. Using higher switching frequency is generally …
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Control design and energy optimisation of a buoyant airborne wind turbine
… stability and power maximisation. Therefore, the control strategy for these systems will be imperative for reducing costs and optimising system performance. Through collaboration with Altaeros Energies, this thesis addresses the outstanding stability and performance optimisation for a specific …
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A decentralized control design approach to a class of large-scale systems
Large-scale systems present a unique control challenge. The large number of states, actuators, and control objectives for these systems often restricts the ability to analyze and control the system as a whole. Typically, these large systems are decomposed into multiple smaller subsystems which can …
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Cloud-Based Model Predictive Control: Establishing a Fully Distributed Architecture for Nonlinear MPC
… last two decades, distributed model predictive control (MPC) has become an increasingly popular research topic. Distributed MPC constitutes a valuable tool, providing computationally efficient optimal control algorithms that can successfully account for the interactions of complex, …