Richard Craig Fields

US Patent:

51364972, Aug 4, 1992

Filed:

Jul 12, 1990

Appl. No.:

7/551313

Inventors:

Carlos J. Coe - Falls Church VA
Elizabeth A. Godfrey - Silver Spring MD
Benjamin L. Henniges - Alexandria VA
David W. O'Brien - Alexandria VA
Jeffery E. Payne - Arlington VA
Michael F. Ashby - Cambridge, GB
Nikolaos Aravas - Philadelphia PA
Robert M. McMeeking - Santa Barbara CA
Richard J. Fields - Rockville MD
Phillip A. Parrish - Springfield VA
Hayden N. G. Wadley - Keswick VA

Assignee:

BDM International, Inc. - McLean VA

International Classification:

G05B 1302

US Classification:

364165

Abstract:

A process and apparatus for providing simulation and modeling and control which permits user feedback for purposes of implementing design and process optimization for composite or powder compact materials. Control is achieved through a dual feedback and feedforward hierarchical control scheme employing an interactive modeling system for providing the feedforward control data and a PID control loop for the feedback control. Modeling is based upon constitutive equations which form the basis of modeling solutions derived from the micromechanical relationships inherent in the consolidated materials. The system is implemented in an FEM software platform such that a graphics based visualization in three dimensional form can be provided to the user.

US Patent:

52028372, Apr 13, 1993

Filed:

Apr 7, 1992

Appl. No.:

7/832870

Inventors:

Carlos J. Coe - Falls Church VA
Elizabeth A. Godfrey - Silver Spring MD
Benjamin L. Henniges - Alexandria VA
David W. O'Brien - Alexandria VA
Jeffery E. Payne - Arlington VA
Michael F. Ashby - Cambridge, C858DE, GB
Nikolaos Aravas - Philadelphia PA
Robert M. McMeeking - Santa Barbara CA
Richard J. Fields - Rockville MD
Phillip A. Parrish - Springfield VA
Hayden N. G. Wadley - Keswick VA

International Classification:

G06F 1546

US Classification:

364476

Abstract:

A process and apparatus for providing simulation and modeling and control which permits user feedback for purposes of implementing design and process optimization for composite or powder compact materials. Control is achieved through a dual feedback and feedforward hierarchical control scheme employing an interactive modeling system for providing the feedforward control data and a PID control loop for the feedback control. Modeling is based upon constitutive equations which form the basis of modeling solutions derived from the micromechanical relationships inherent in the consolidated materials. The system is implemented in an FEM software platform such that a graphics based visualization in three dimensional form can be provided to the user.