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Bifurcations, Chaos and Crises in Power System Voltage Collapse
(1992)
Bifurcations occurring in power system models exhibiting voltage collapse have been the subject of several recent studies. Although such models have been shown to admit a variety of bifurcation phenomena, the view that ...
Dynamics and Control of Constrained Nonlinear Systems
(1992)
As applications have grown in the fields of robotics and automation, power systems, and electronic circuit systems, there has been an increasing interest in the control of constrained dynamic systems described by differential ...
Coordination of the Walking Stick Insect Using a System of Nonlinear Coupled Oscillators
(1992)
The area of walking machines is investigated. A design for pattern generator composed of nonlinear coupled oscillators which generates the characteristic gaits of the walking stick insect is presented. A full dynamic model ...
Dissipation Induced Instabilities
(1992)
The main goal of this paper is to prove that if the energy- momentum (or energy-Casimir) method predicts formal instability of a relative equilibrium in a Hamiltonian system with symmetry, then with the addition of ...
Nonlinear Dynamics of Axial-Flow Compressors: A Parametric Study
(1992)
Analysis of the post-instability dynamical behavior of an axial- flow compression system model is carried out in a bifurcation- theoretic setting. Using global analysis techniques, we uncover the sequence of bifurcations ...
Nonholonomic Geometry, Mechanics and Control
(1992)
This dissertation is concerned with dynamic modeling and kinematic control of constrained mechanical systems with symmetry from a geometric point of view. Constraints are defined via the characteristics of distributions ...
Bifurcation Analysis of Nonuniform Flow Patterns in Axial-Flow Gas Compressors
(1992)
We study the transition from steady, spatially uniform-flow to nonuniform and time-dependent gas axial velocity profiles in an axial flow compression system. Local bifurcation analysis of the uniform-flow solution reveals ...
On the Geometry and Dynamics of Floating Four-Bar Linkages
(1992)
In this paper, we investigate the kinematics and dynamics of floating, planar four-bar linkages. The geometry of configuration space is analyzed through the classical theory of mechanisms due to Grashof. The techniques of ...
Optimal Estimation of Domains of Attraction for Nonlinear Dynamical Systems
(1992)
This thesis implements a recently proposed algebraic methodology for optimal domain of attraction estimation, and extends the method to include optimal estimation of the largest inscribed ball. In addition, a numerical ...
Adaptive Friction Compensation for Bi-Directional Low-Velocity Position Tracking
(1992)
This paper presents a comparative investigation of friction- compensating control strategies designed to improve low-velocity position tracking performance in the presence of velocity reversals for servomechanisms. The ...