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 “"linear quadratic gaussian (LQG)"”.
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Centralized and Decentralized Control With Limited Information
… accuracy given fixed average throughput, under a linear quadratic Gaussian (LQG) setup. We demonstrate that more frequent communication is beneficial given a fixed amount of information.
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Rational inattention in control of Markov chains
… in this paper reduces to a variant of the linear-programming representation of the average-cost optimal control problem, subject to an additional mutual information constraint on the randomized stationary policy. The resulting in nite-dimensional convex program admits a decomposition based …
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Simulation Development, Path Planning, and Linear Quadratic Gaussian Precision Landing for Unmanned Traffic Management Operations
… applications, utilizing AprilTags with a Linear Quadratic Gaussian (LQG) law. Tests were conducted with the High Fidelity framework developed. Results indicate that the guidance and control law is robust from gust disturbances injected in the simulation realm.
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Enabling reliable control with communication constraints
… to sustain a given control performance in a Linear-Quadratic-Gaussian (LQG) control system. We then demonstrate that these bounds are nearly achievable using a time-invariant data compression architecture. We use the proposed architecture to develop algorithms for minimum rate LQG control …
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Application of multivariable and intelligent control strategies for improving plasma characteristics in reactive ion etching
… as Proportional-Integral ( PI ) self-tuning, Linear Quadratic Gaussian ( LQG ), stochastic adaptive control, Deurocontrol, robust and hierarchical control based on both linear and nonlinear models of the Plasma Generation Subsystem (PGS) are developed to improve plasma characteristics in the …
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Design of active trailer steering systems for long combination vehicles using robust control techniques
… far, the design of ATS systems have utilised the Linear Quadratic Regulator (LQR) control technique. Although the LQR technique provides satisfactory results, it fails to control the system in presence of external disturbances such as sensor noise, parametric uncertainties, and un-modelled …
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Gain scheduling for geometrically nonlinear flexible space structures
… approach for the control of geometrically nonlinear structures is developed. The objective is to improve performance over current linear design techniques that are applied to the same control problem. The approach is applicable to a variety of structures that have complex dynamics with slow …
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State-space LQG self-tuning control of flexible structures
… design method developed based 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 …
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Position and vibration control of flexible space robots
… is adopted to separate the equations into nonlinear rigid-body equations and linear perturbation equations. The nominal trajectory is planned to conserve the limited actuator resources and keep the platform attitude stationary, by eliminating the inherent kinematic redundancy of the …
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Feedback Control of Multi-Story Structures under Seismic Excitations
… different types of control 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 …
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Decentralized control of sound radiation from periodically stiffened panels
… strategy, which combines frequency-shaped linear quadratic Gaussian (LQG) control with loop transfer recovery (LTR), is capable of achieving 12dB peak reductions and a 3.6dB integrated reduction in radiated sound power from a rib-stiffened aluminum panel.
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An analytical investigation of passive and active suspension systems for articulated freight vehicles
… conclusions drawn from the covariance analysis. Linear Quadratic Gaussian (LQG) control technique is employed to design an ideal fail-safe active suspension scheme based on full-state feedback. Passive damping and stiffness elements are incorporated in the active suspension system to yield a …
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Learning-based optimal and robust control: A policy optimization perspective
… for tackling challenging problems involving nonlinear dynamics, high-dimensional systems, or insufficient parameterization. These qualities also make PO a promising approach for addressing control theory problems, where traditional methods often rely on well-defined models that may not be …
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Structural control strategies for earthquake response reduction of buildings
… hysteresis loops produced by the linear quadratic regulator (LQR) and the linear quadratic Gaussian (LQG) algorithms is explored. Then, new simple algorithms are proposed, which can produce versatile hysteresis loops. Moreover, the proposed algorithms do not require a model of the …
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Experimental sliding mode control of a flexible single link manipulator
… results compared favorably against the Linear Quadratic Gaussian (LQG) controller under the same load variations. To realize the proposed new controller designs, a novel approach is devised for these kinds of plants to obtain all the states. Separate first order observers are used to …
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Homotopy algorithms for H²/H<sup>∞</sup> control analysis and synthesis
… parallelization on shared memory machines. The linear-quadratic-Gaussian (LQG) theory has engendered a systematic approach to synthesize high performance controllers for nominal models of complex, multi-input multioutput systems and hence it is a breakthrough in modern control theory. Homotopy …
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Closed-Loop Combustion Control of a Multi Cylinder HCCI Engine using Variable Compression Ratio and Fast Thermal Management
… A system identification is made and a Linear Quadratic Gaussian (LQG) controller is designed for the fast thermal management instead of the standard PID controller. CLCC performance of both PID and the state feedback based LQG controllers using fast thermal management are investigated …
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Noncooperative static and dynamic games: addressing shared constraints and phase transitions
Compared to linear systems, nonlinear generalizations may exhibit both non-equilibrium and equilibrium behavior in the long run. The characterization of such behavior is challenging, particularly when overlaid by an optimization or control layer, and is of relevance in a range of applications, …
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Optimal placement of sensor and actuator for sound-structure interaction system
… a robust feedback controller based on minimax LQG control design method. The controller is aimed to reduce acoustic potential energy in the cavity. This energy is due to the structure-borne sound inside the sound-structure interaction system. Practical aspects of the method for optimal …
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Dynamic sequential decision problems with asymmetric information: some existence results
… (CIMPE), for a class of two-player dynamic linear-Gaussian (LG) games of asymmetric information satisfying two general conditions. The most appealing property of CIMPE is that it can be computed using a backward induction algorithm. Further, if the cost functions of the decision makers are …