Accession Number : ADA260536

Title :   Qualitative Process Automation for Autoclave Curing of Composites.

Descriptive Note : Final rept. 1 Dec 87-30 Oct 90,

Corporate Author : WRIGHT LAB WRIGHT-PATTERSON AFB OH

Personal Author(s) : LeClair, S. R. ; Warnock, R.

Report Date : MAY 1992

Pagination or Media Count : 38

Abstract : An adaptive or self-directed control system was first devised by the Air Force Wright Laboratory's Materials Directorate. This system, referred to as Qualitative Process Automation (QPA), uses sensors located on the part to determine the state of the resin in real time. Instead of process decisions being based on an inflexible, predetermined schedule of changes in temperature and pressure, these changes are determined based on the actual state (stages in the chemical reaction) of the material when they occur. This allows the engineer to define the desired product and allows the process to vary to achieve that product. This contrast with the current method, which prescribes the processing schedule and merely monitors material behavior during processing, has led to a significant reduction in cure times for production parts....Qualitative process automation, Polymer, Composites, Autoclave curing, Expert systems.

Descriptors :   *AUTOCLAVES, *AUTOMATION, *CURING, *PLASTICS, *COMPOSITE MATERIALS, AIR FORCE, CHEMICAL REACTIONS, CONTROL SYSTEMS, EXPERT SYSTEMS, POLYMERS, PRESSURE, PROCESSING, PRODUCTION, REAL TIME, REDUCTION, TEMPERATURE, TIME, COMPOSITE STRUCTURES.

Subject Categories : Laminates and Composite Materials
      Mfg & Industrial Eng & Control of Product Sys
      Plastics

Distribution Statement : APPROVED FOR PUBLIC RELEASE