Control and Optimization Laboratories
Now showing items 1-10 of 58
Naval Postgraduate School - Cyber Summit
(Monterey, California. Naval Postgraduate School, 2009-10-29)
Formal Analysis of Elastically Supported Beam Columns
A method is presented for the systematic analysis of elastically supported beam-columns or tie-bars in which formal notational devices simplify the handling of complicated discontinuous lateral loads. Various relationships ...
Tip-loaded Cantilever Beams
The author is Professor of Mechanical Engineering at the U. S. Naval Postgraduate School, Monterey, California, and formerly Director of Engineering Sciences of the Service Bureau Corporation, a subsidiary of IBM. His Ph.D. ...
Behavior of Separation Constants for Finite Gyromagnetic Plasmas
The type of the functions appearing in the expressions for electromagnetic fields in finite magnetoplasmas depends only on the properties of the medium manifested in separation constants. Theomega-betaplane of the Brillouin ...
Formulation of Stability Conditions for Systems Containing Driven Rotors
The much maligned energy-sink analysis is revisited to derive stability conditions for a dual-spin spacecraft that is subjected to possible energy additions by the motor torque. Landon's old idea of subtracting the work ...
Low-Earth-Orbit Maintenance: Reboost vs Thrust-Drag Cancellation
We define the problem of orbit maintenance within an atmosphere as keeping the spacecraft within a specified altitude band about a mean circular orbit.
Nutational Stability and Core Energy of a Quasirigid Gyrostat
The asymptotic nutational stability of a quasirigid gyrostat is analyzed. The primary purpose of this analysis is to resolve a debate concerning the use of the energy-sink method of analysis for systems containing driven ...
Second Look at Approximating Differential Inclusions
In many direct methods for numerically solving optimal control problems, a collocation technique is used. What distinguishes numerous direct collocation schemes is the discretization of the time history and the way the ...
Gravitational Effects of Earth in Optimizing Delta V for Deflecting Earth-Crossing Asteroids
Analyses incorporating the gravitational effects of Earth to calculate optimal impulses for de ecting Earthcrossing asteroids are presented. The patched conic method is used to formulate the constrained optimization ...
Unscented Kalman Filtering: NPSAT1 Ground Test Results
(The American Institute of Aeronautics and Astronautics (AIAA), 2006-08-21)
NPSAT1 is a small satellite that employs magnetic sensing and actuation for attitude control. The spacecraft orientation and angular velocity should, therefore, be estimated from the magnetometer readings. The inherent ...