论文信息 - OG PREDICTIVE NONLINEAR MODELING FOR CONTROL

OG PREDICTIVE NONLINEAR MODELING FOR CONTROL

The MIT/MACE-II flight experiment is an investigation of high authority control of geometrically nonlinear flexible structures. In this context, geometric nonlinearity indicates large changes in dynamics (modal frequencies and residues) under joint configuration changes. The structure is assumed to move slowly, so that ratedependent terms are negligible. The modeling approach is motivated by the lack of in situ test data available for design of OG controllers. A physical model is used so that parameter updated 1G linear models can be extrapolated to predict OG geometrically nonlinear behavior. The paper describes the parameter updating approach developed for MIT/MACE-II. Experimental results are presented to demonstrate that the resulting quality of fit to the Ig linear experimental data is nearly as good as state of the art measurement modeling algorithms.

David W. Miller | Carl Blaurock | Jeremy H. Yung

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