UDC 536.2

F. Kowsary1), M. Sefidgar1), 
A. Pourshaghaghy2),and A. Hakkaki-Fard1)

ESTIMATION OF KINETIC PARAMETERS OF COMPOSITE MATERIALS DURING 
THE CURE PROCESS USING COMBINED WAVELET REGULARIZATION METHOD

The limitation of the experimental methods in thermophysical 
characterization of composite materials leads to an increased use 
of inverse parameter estimation techniques. However, in some situations 
the convergence of the inverse algorithm is impossible due to the 
correlation of the involved parameters and the existing noises in 
measurement data. Several different approaches have been used to tackle 
this problem. In this article, a new approach is utilized to solve 
it. This new technique is combining the wavelet denoising and Levenberg-
Marquardt regularization method. In order to examine this technique, 
a highly ill-posed problem is considered as a test case; that is, 
the estimation of the composite kinetic parameters during the cure process. 

Keywords: Wavelet denoising, parameter estimation, 
composite kinetic parameter, Levenberg-Marquardt.

1)Department of Mechanical Engineering, Faculty of Engineering, 
University of Tehran, Tehran, Iran; 2)Department of Mechanical 
Engineering, Iran University of Science and Technology (IUST), Tehran, 
Iran; email: apoursh@gmail.com. Original article 
submitted June 23, 2008.