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 76 for “"LQG"”.
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The LQG/LTR method and discrete-time control systems
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1984.
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State-space LQG self-tuning control of flexible structures
… upon a state-space linear quadratic Gaussian (LQG) control strategy for rejecting a disturbance in a flexible structure in the face of model uncertainty. The parameters to be tuned are treated as additional state variables and are estimated recursively together with the system state that is …
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Multivariable control of a submarine using the LQG/LTR method
Thesis (Ocean E.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and, (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1985.
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Thrust modulated multivariable control of the GE21 engine using the LQG/LTR method
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1986.
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Multivariable control for the GE T700 engine using the LQG/LTR design methodology
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1984.
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Multivariable control of a twin lift helicopter system (TLHS) using the LQG/LTR design methodology
Thesis: M.S., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 1987
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Gain-scheduled multivariable control for the GE-21 turbofan engine using the LQR and LQG/LTR methodologies
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1984.
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H<sub>∞</sub> and LQG optimal control for the rejection of persistent disturbances: analysis, design and experiment
… in terms of the well-known behavior of the LQG controller and gives some insight into the physics of the H<sub>∞</sub> controller that is often presented in an unclear manner in the current literature. The connections to LQ game theory that underlie this confusion are discussed. Augmented …
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Frontiers of Liouville quantum gravity
… two dimensions called Liouville quantum gravity (LQG). LQG was originally described heuristically by physicists, and mathematicians have grappled with the challenge of defining it rigorously and analyzing its properties. We investigate elements of the theory of LQG that are still poorly …
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Random conformally covariant metrics in the plane
… We mainly consider *Liouville quantum gravity* (LQG), a model introduced in the physics literature in the 1980s by Polyakov in order to provide a canonical example of a random surface with conformal symmetries and formally given by the Riemannian metric tensor "$e^{\gamma h} (dx^2+dy^2)$'' where …
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Integrability in random conformal geometry
Liouville quantum gravity (LQG) is a random surface arising as the scaling limit of random planar maps. Schramm-Loewner evolution (SLE) is a random planar curve describing the scaling limits of interfaces in many statistical physics models. Liouville conformal field theory (LCFT) is the quantum …
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Conformal welding of random surfaces from Liouville theory
Liouville quantum gravity (LQG) is a natural model describing random surfaces, which arises as the scaling limit for random planar maps. Liouville conformal field theory (LCFT) is the underlying 2D CFT that governs LQG. Schramm-Loewner evolution (SLE) is a random planar curve, which describes the …
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Feedback Control of Multi-Story Structures under Seismic Excitations
… methodologies, the Linear Quadratic Gaussian (LQG) control, the Disturbance Accommodating Control (DAC), and the hybrid LQG/DAC approaches, were successfully developed to actively mitigate the vibration of the multi-story structures subjected to the seismic disturbance. In addition, the Kalman …
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On the metric structure of random planar maps and SLE-decorated Liouville quantum gravity
… called [gamma]-Liouville quantum gravity (LQG) surfaces with parameter [gamma] E (0, 2]. We study the large-scale structure of random planar maps (and statistical mechanics models on them) viewed as metric measure spaces equipped with the graph distance and the counting measure on vertices. …
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Dynamic multi-person optimization with weakly coupled agents
… solution. Specifically, we have studied LQG teams featuring a nonclassical information pattern, nonlinear deterministic differential games, LQG nonzero-sum games and Markov decision problems. In the case of LQG teams, we showed the existence of finite-dimensional linear controllers …
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Active Control of a Cable -Stayed Bridge Against Earthquake Excitations
The performance of the LQG- and H2-based controllers was less than satisfactory, in the sense that the performance was not as good for the evaluation model as it was for the design model. The controller designed with mu-tools, on the other hand, was robust, and the resulting evaluation criteria …
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Reduced Order Controllers for Distributed Parameter Systems
… model reduction methods. One such technique is LQG balanced truncation. Only recently has theory for LQG balanced truncation been developed in the infinite dimensional setting. In this work, we numerically investigate the viability of LQG balanced truncation as a suitable means for designing low …
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Cardy embedding of random planar maps and a KPZ formula for mated trees
… physics models. Liouville quantum gravity (LQG) is a random fractal surface which arises as the scaling limit of discrete surfaces known as random planar maps (RPM). First, we study Hausdorff dimensions for SLE curves. We prove a KPZ-type formula which relates the Hausdorff dimension of an …
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Parameter robust reduced-order control of flexible structures
… due to Tahk and Speyer, to arrive at two new LQG-based methods of parameter robust control. One component of the robustness procedure, common to both methods, is the application of an auxiliary cost functional penalty to desensitize the system to variations in selected parameters of the …
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Gaussian free field, Schramm-Loewner evolution and Liouville quantum gravity
… second part, we study Liouville quantum gravity(LQG).
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