Estimation, Control and Optimization of Curing in Thick-Sectioned Composite Parts

[+] Author and Article Information
Sanjay Parthasarathy, Susan C. Mantell, Kim A. Stelson

Department of Mechanical Engineering, University of Minnesota, Minneapolis, MN 55455

J. Dyn. Sys., Meas., Control 126(4), 824-833 (Mar 11, 2005) (10 pages) doi:10.1115/1.1850536 History: Received July 16, 2003; Revised January 06, 2004; Online March 11, 2005
Copyright © 2004 by ASME
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Experimental temperature profile using MRCC for a thick sectioned composite part
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Block diagram for control, estimation and optimization of curing
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Discretization of part geometry in the thickness direction
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Prediction horizon for online optimization
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Comparison of experimental and simulated (reduced order model) temperatures in the 48 ply part sectioned composite
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Simulation of the temperature profile for a 48 ply part using a DI controller, with gain KDI=0.025
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Temperature estimation error within a 48 ply composite using the nonlinear observer with θ=0.02°C/s
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Computed cost functions J1 and J2 for varying heating rates for a 48-layer part
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Optimized heating rates for a 48 ply composite
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Simulated temperature profiles in a 48 ply composite using online optimization
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Temperature profile in a 48 ply composite with nonlinear control and online optimization
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Heat flux actuation command to the heater elements
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Estimation of temperature at the center of a 48 ply composite
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A comparison of setpoint temperature profiles using MRCC and the online optimizer for a 48 ply part
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Online optimization of the temperature heating rate




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