Maximum likelihood estimation for distributed parameter models of flexible spacecraftA distributed-parameter model of the NASA Solar Array Flight Experiment spacecraft structure is constructed on the basis of measurement data and analyzed to generate a priori estimates of modal frequencies and mode shapes. A Newton-Raphson maximum-likelihood algorithm is applied to determine the unknown parameters, using a truncated model for the estimation and the full model for the computation of the higher modes. Numerical results are presented in a series of graphs and briefly discussed, and the significant improvement in computation speed obtained by parallel implementation of the method on a supercomputer is noted.
Document ID
19900043040
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Taylor, L. W., Jr. (NASA Langley Research Center Hampton, VA, United States)
Williams, J. L. (NASA Langley Research Center Hampton, VA, United States)