Thesis (M.S. in Physics)--United States Naval Postgraduate School, California. / "Unclassified Physics." Includes bibliographical references (p. 20). 8

Thesis (Ph.D)--Chemistry and Biochemistry, Georgia Institute of Technology, 2010. / Committee Chair: El-Sayed, Mostafa; Committee Member: Perry, Joseph; Committee Member: Wang, Zhong; Committee Member: Whetten, Robert; Committee Member: Zhang, John. Part of the SMARTech Electronic Thesis and Dissertation Collection.

Thesis (Ph.D.) - University of St Andrews, November 2009. / Restricted until 5th November 2011.

Thesis (M.Phil.)--Hong Kong University of Science and Technology, 2005. / Includes bibliographical references (leaves 69-70). Also available in electronic version.

Thesis (M.E.)--University of Canterbury, 2007. / Typescript (photocopy). "March 2007." Includes bibliographical references (p. 123-127). Also available via the World Wide Web.

Thesis (Ph. D.)--West Virginia University, 2001. / Title from document title page. Document formatted into pages; contains xvi, 217, 2 p. : ill. (some col.). Vita. Includes abstract. Includes bibliographical references (p. 198-207).

Στην παρούσα διπλωματική εργασία παρουσιάζεται η μεθοδολογία εξαγωγής διαφορικών εξισώσεων κατά Hamilton. Οι προκύπτουσες διαφορικές εξισώσεις είναι n το πλήθος (όπου n είναι το πλήθος των βαθμών ελυθερίας του συστήματος) διαφορικές εξισώσεις πρώτου βαθμού και περιγράφουν την δυναμική συμπεριφορά ενός μηχανικού συστήματος. Παρουσιάζεται το εκτενές θεωρητικό πλαίσιο που απορρέει απο τις εξισώσεις του Ηamilton και αξιοποιούνται οι θεωρητικές αρχές κατα την περιγραφή και τον έλεγχο του συστήματος σφαίρας-ράβδου. / In the diploma thesis we present the Hamiltonian formalism in order to derive first order differential equations which represent the dynamical behaviour of a mechanical system. The derived differential equations are n first order equations (where n is the number of system's degrees of freedom). We present the extensive theoretical framework that is derived from the Hamilton's equations which we use so that to describe and control the ball and beam system.

No description available.

The ball and beam system is a very simple and powerful control system problem. The easy construction of this system combined with its challenging control design requirement makes it one of the most favorable example models for control engineers. The model contains a horizontal beam which can pivot about its center; a DC Motor whose shaft is connected to the center of the beam; and a ball that can freely roll on top of the beam. The basic idea is to accurately tilt the beam about its center, using the motor, to indirectly control the position of the ball that freely rolls on the beam. In this thesis, the L1 adaptive control technique is considered for precise positioning of the rolling ball on the beam. Two different architectures of L1 adaptive control namely, the L1 adaptive state feedback control and the L1 adaptive output feedback control are designed and verified in simulation. L1 adaptive control guarantees transient performance and robustness in presence of fast adaptation without introducing or enforcing persistence of excitation.

Eccentric braced frames have been a topic of research in seismic design over the past twenty years. The idea of eccentric bracing is a relatively new method used in practice to satisfy seismic design requirements. They have been proven to give reliable results in tests using simulated earthquake events, as well as provide an economical advantage over other framing methods. Two one-story eccentric braced frame models were created using computer generated finite element analysis. The example chosen for this study are discussed further. The maximum shear stress distribution in the link beam of the frame, using finite element analysis, will be investigated herein. The results of the shear stress produced gives insight to shear forces developed in the link beam of eccentric braced frames. The results of shear forces produced are compared with those calculated by structural engineers using commonly used hand calculated equations.