Michael R Mcfarland

US Patent:

6478250, Nov 12, 2002

Filed:

Sep 11, 2000

Appl. No.:

09/659147

Inventors:

Robert J. Adams - Tucson AZ
Michael B. McFarland - Tucson AZ
Wayne V. Spate - Tucson AZ
Arthur J. Schneider - Tucson AZ
Michael J. Kaiserman - Tucson AZ
Stanton L. Winetrobe - Oro Valley AZ

Assignee:

Raytheon Company - Lexington MA

International Classification:

F42B 1514

US Classification:

244 323, 244 322, 60201

Abstract:

A spin-stabilized missile includes two or more spin nozzles along a perimeter of the missile, the nozzles being operatively coupled to a pressurized gas source. The pressurized gas source provides pressurized gas which passes through the nozzles and external to the missile, thereby providing circumferential thrust which causes a torque on the missile that results in the missile rolling or spinning. The pressurized gas source may be a pressure container containing solid rocket fuel. The pressurized gas source for spinning the missile may be the same as that for the missiles main propulsion system.

US Patent:

6611823, Aug 26, 2003

Filed:

Apr 20, 2000

Appl. No.:

09/553601

Inventors:

Rastko R. Selmic - Dallas TX
Frank L. Lewis - Arlington TX
Anthony J. Calise - Atlanta GA
Michael B. McFarland - Tucson AZ

Assignee:

Board of Regents, The University of Texas System - Austin TX

International Classification:

G06F 1518

US Classification:

706 14, 706 15, 706 17, 706 23, 700 44, 700 48

Abstract:

Methods and systems for backlash compensation. Restrictive assumptions on the backlash nonlinearity (e. g. the same slopes of the lines, etc. ) are not required. The compensator scheme has dynamic inversion structure, with a neural network in the feedforward path that approximates the backlash inversion error plus filter dynamics needed for backstepping design. The neural network controller does not require preliminary off-line training. Neural network tuning is based on a modified Hebbian tuning law, which requires less computation than backpropagation. The backstepping controller uses a practical filtered derivative, unlike the usual differentiation required by earlier backstepping routines. Rigorous stability proofs are given using Lyapunov theory. Simulation results show that the proposed compensation scheme is an efficient way of improving the tracking performance of a vast array of nonlinear systems with backlash.

US Patent:

6817568, Nov 16, 2004

Filed:

Feb 27, 2003

Appl. No.:

10/376192

Inventors:

Wayne V. Spate - Cortaro AZ
Arthur J. Schneider - Tucson AZ
Michael B. McFarland - Tucson AZ

Assignee:

Raytheon Company - Lexington MA

International Classification:

F42B 1256

US Classification:

244 315, 244 31, 244 311, 244 314, 244 319, 244 321, 89 111

Abstract:

A multi-staged missile includes a booster and a submunition delivery vehicle that has one or more submunitions. The booster rapidly accelerates the submunition vehicle, and then separates from the submunition vehicle. The submunition delivery vehicle is then maneuvered to approach a target. Individual submunitions finally separate, and are individually guided to the target. By providing multiple, independently-targeted submunitions, the missile greatly increases the chances of hitting the target.

Author:

Michael J. McFarland

ISBN #:

0070471789

Author:

Michael Ekim McFarland

ISBN #:

2890401960