Accession Number : ADA468818


Title :   Advanced Polymer Composite Molding Through Intelligent Process Analysis and Control


Descriptive Note : Final rept. 1 Apr 2005-31 Dec 20006


Corporate Author : WICHITA STATE UNIV KS DEPT OF MECHANICAL ENGINEERING


Personal Author(s) : Minaie, Bob


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA468818


Report Date : 30 MAR 2007


Pagination or Media Count : 74


Abstract : To prevent dry spot formation in RTM, a control interface and four different adaptive control algorithms were developed and tested with numerical simulations. The interface is capable of controlling the flow pattern of resin as it fills a mold containing a preform. The mold is equipped with multiple inlet gates, a single vent and a spinal sensor system that continuously feeds the interface with the resin flow front location along the spine lines connecting the inlet gates to the vent. Four different adaptive control algorithms targeting on injection flow rate control, injection pressure control, linearly-corrected pressure control, and the combined flow rate and linearly-connected pressure control were developed. Placement of the gates-sensors in addition to the possibility of permeability disturbances (race-tracking) could affect the filling pattern and ultimately the controllability of the developed schemes. To overcome this a sue, the location of the gates-sensors was optimized based on the minimization of void formation and filling time. Particle Swarm Optimization (PSO) coupled with adaptive control was implemented on the aforementioned problem and results were compared to previous work using Selective Exhaustive Search (SES) and Genetic Algorithm (GA). Three journal papers and six conference papers have been published.


Descriptors :   *COMPOSITE MATERIALS , MATHEMATICAL MODELS , ALGORITHMS , SIGNAL PROCESSING , GATES(CIRCUITS) , RESIN TRANSFER MOLDING , ADAPTIVE CONTROL SYSTEMS , DETECTORS , POLYMERS


Subject Categories : LAMINATES AND COMPOSITE MATERIALS
      STATISTICS AND PROBABILITY
      COMPUTER PROGRAMMING AND SOFTWARE


Distribution Statement : APPROVED FOR PUBLIC RELEASE