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 18 of 18 for “"H-infinity control"”.
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The robustness of H-infinity control
Modern control theory generates controllers of a high order. Since these controllers inherently require elaborate circuits or algorithms for implementation, there is always the possibility that the implemented controller will differ from the designed controller by a certain degree. Furthermore, the …
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Robust H[infinity] control via quadratic stabilization
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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H-Infinity Control in Infinite-Dimensional Spaces and Related Partial Differential Equations
… equations that arise in nonlinear $H\sp{\infty}$ control problems where the system is affine in the control and the disturbance. In each case the existence of viscosity supersolutions is proven.
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An application of robust H₂/H[infinity] control synthesis to launch vehicle ascent by Tyler Nicklaus Hague.
This thesis explores the application of H2/H [infinity] control synthesis methods to launch vehicle ascent, specifically the pitch-plane control of the Kistler Aerospace launch vehicle, K1. A classical single-input, single-output design is also presented in order to assess the true applicability of …
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Improved Dynamic Modeling and Robust Control of Autonomous Underwater Vehicles
… we seek to improve the dynamic modeling and control of autonomous underwater vehicles (AUVs). We address nonlinear hydrodynamic modeling, simplifying modeling assumptions, and robust control for AUVs. In the literature, various hydrodynamic models exist with varying model complexity and with …
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Missile autopilot design using Mu-Synthesis
… critical missile system elements is the flight control system, since its time constant is typically half of the total missile system time constant. Conventional autopilot design techniques have worked well in the past, but in order to satisfy future and more stringent design specifications, new …
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H-Infinity Norm Calculation via a State Space Formulation
There is much interest in the design of feedback controllers for linear systems that minimize the H-infty norm of a specific closed-loop transfer function. The H-infty optimization problem initiated by Zames (1981), \\cite{zames1981feedback}, has received a lot of interest since its formulation. In …
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PID Control, Design, Extension, Application
This thesis considers the design of PID controllers, the extensions of these controllers to improve their performance, and the applications of these design methods to industrial processes. New tuning methods for PI and PID controllers have been presented. These methods uses a model of the process …
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Harmonic and Narrowband Disturbance Rejection for Linear Time-Periodic Plants
… are classical and multivariable feedback controllers, fixed-gain feedforward designs using finite impulse response (FIR) filters and H-infinity synthesis tools, and adaptive feedforward controllers. The objective of time-periodic, narrowband, disturbance rejection seeks to place a zero in …
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Improved continuous-time higher harmonic control using H [infinity] methods
… and also increases its operational cost. Passive control techniques have been applied to helicopter vibration suppression, but these methods are generally heavy and are not robust to changes in operating conditions. Feedback control offers the advantages of robustness and potentially higher …
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Autonomous Vehicle Control using Image Processing
… In telerobotic manual mode, the model vehicle is controlled by a human driver at a stationary remote control station with full-scale steering wheel and gas pedal. The vehicle can either be an unmodified toy remote-control car or a vehicle equipped with wireless radio modem for communication and …
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On the Security and Reliability of Fixed-Wing Unmanned Aircraft Systems
… focus on three strands of work: i) designing UAS controllers with performance guarantees using the robust control framework, ii) developing tools for detection and mitigation of physical-layer security threats in UAS, and iii) extending tools from compositional verification to design and verify …
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A factorization approach for solving the Hamilton-Jacobi equations in nonlinear optimal control
… and sufficient condition for an optimal control, is very difficult to solve for general nonlinear systems, and therefore its application remained limited to linear systems. Yet, the HJE has been studied extensively in the literature from diverse areas of science and engineering, varying …
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Decentralized control of linear switched systems with receding horizon
… thesis, we consider the decentralized switched control problem where exact conditions for controller synthesis are obtained via Linear Matrix Inequalities (LMIs). Using known derivations for a centralized controller with look-ahead, we were able to extend the decentralized problem with finite …
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Multirobot Tethering for Localization and Control
… the state estimate is an integral part of system control. We investigate the use of particle filter estimation techniques on a hovercraft vehicle. The marginally stable dynamics of a hovercraft require reliable state estimates for proper stability and control. We use the Monte Carlo localization …
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Modeling and control of high density microcantilever systems
… this thesis we build on our earlier work on the control of high density, electrostatically actuated microcantilever arrays and present simple state feedback controllers that can achieve reasonable performance. These controllers are localized, spatially distributed and yield tracking performances …