US5136497A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material consolidation modeling and control system
Assignee: COMMERCE SECRETARY OF United States,
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Filing: 1990-07-12
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Granted: 1992-08-04
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Expires: 2010-07-12
Abstract
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.
Inventors
- 👤 Carlos J. Coe
- 👤 Elizabeth A. Godfrey
- 👤 Benjamin L. Henniges
- 👤 David W. O'Brien
- 👤 Jeffery E. Payne
- 👤 Michael F. Ashby
- 👤 Nikolaos Aravas
- 👤 Robert M. McMeeking
- 👤 Richard J. Fields
- 👤 Phillip A. Parrish
- 👤 Hayden N. G. Wadley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:58
CPC Classifications
G; G05; G05B; G05B17/00; G05B17/02; G05B13/00; G05B13/02; G05B13/0205
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
83 words
An apparatus for controlling the consolidation of material forms, comprising: modeling means to stimulate consolidation processes; user-interface means for providing the system operator with visual and graphical representations of the output of said modeling means; material consolidation control means wherein information provided to said modeling means through said user-interface means provides feedforward control information for said consolidation processes; and PID control means for providing feedback control information to control said consolidation processes wherein both said feedforward control and feedback control processing occurs simultaneously.
Claim 2
Independent Claim
83 words
An apparatus for controlling the consolidation of material forms, comprising: modeling means to stimulate consolidation processes; user-interface means for providing the system operator with visual and graphical representations of the output of said modeling means; material consolidation control means wherein information provided to said modeling means through said user-interface means provides feedforward control information for said consolidation processes; and PID control means for providing feedback control information to control said consolidation processes wherein both said feedforward control and feedback control processing occurs simultaneously.
Claim 3
Dependent Claim
32 words
The apparatus of claim 1 wherein said modeling means include: relation means for receiving particular parameters for the material and consolidation process and for determining the constitutive relations which govern material behavior.
Claim 4
Dependent Claim
14 words
The apparatus of claim 2 wherein said constitutive relations are based on continuum mechanics.
Claim 5
Dependent Claim
19 words
The apparatus of claim 2 wherein said constitutive relations govern multiple densification mechanisms including plasticity, power-law creep and diffusion.
Claim 6
Dependent Claim
18 words
The apparatus of claim 4 wherein said relation means interrelate the constitutive relations governing the multiple densification mechanisms.
Claim 7
Dependent Claim
26 words
The apparatus of claim 5 wherein said relation means interrelate the constitutive relations based upon an estimate of a stage of densification of the material form.
Claim 8
Dependent Claim
18 words
The apparatus of claim 6 wherein said stage of densification is one of Stage I an Stage II.
Claim 9
Dependent Claim
26 words
The apparatus of claim 6 wherein said stage of densification is one of Stage I, Stage II and a transition between Stage I and Stage II.
Claim 10
Dependent Claim
20 words
The apparatus of claim 1 wherein the density of said material forms are in the range of 0.60 to 1.00.
Claim 11
Dependent Claim
14 words
The apparatus of claim 1 wherein the modeling means always provides convergent numerical solutions.
Claim 12
Dependent Claim
21 words
The apparatus of claim 1 wherein the user-interface means provides visual and graphical representations of one, two and three dimensional outputs.
Claim 13
Dependent Claim
18 words
The apparatus of claim 1 wherein the user-interface means provides representations of predicted macroscopic and microscopic shape changes.
Claim 14
Dependent Claim
19 words
The apparatus of claim 1 wherein the user-interface means provides representations of predicted physical instabilities of the material form.
Claim 15
Dependent Claim
26 words
The apparatus of claim 1 wherein the user-interface means provides representations of predicted effects of container surfaces and parameters on the consolidation of the material form.
Claim 16
Dependent Claim
19 words
The apparatus of claim 1 wherein the user-interface means provides representations of predicted densification on macroscope and microscopic bases.
Claim 17
Dependent Claim
28 words
The apparatus of claim 1 wherein the user-interface means include modifying means for allowing the user to change particular parameters for the material form and the consolidation process.
Claim 18
Dependent Claim
28 words
The apparatus of claim 1 further comprising measurement means for providing empirical parameters for the material form and consolidation process to said modeling means throughout said consolidation process.
Claim 19
Dependent Claim
23 words
The apparatus of claim 17 wherein said modeling means simulates said consolidation process based on the empirical parameters received from said measurement means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-04 | 1996-02-03 | 1996-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-04 | 2000-02-03 | 2000-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-04 | 2004-02-03 | 2004-08-04 | $7700.00 | Window Closed / Lapsed |