Computational intelligence methods for helicopter loads estimation

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Proceedings titleNeural Networks (IJCNN), The 2011 International Joint Conference on
ConferenceThe 2011 International Joint Conference on Neural Networks (IJCNN), July 31 - August 5, 2011, San Jose, California, USA
Pages18641871; # of pages: 8
SubjectUsage monitoring, Computational intelligence methods, Data models , Helicopters , Input variables , Predictive models , Rotors , Solid modeling
AbstractAccurately determining component loads on a helicopter is an important goal in the helicopter structural integrity field. While measuring dynamic component loads directly is possible, these measurement methods are not reliable and are difficult to maintain. This paper explores the potential of using computational intelligence methods to estimate some of these helicopter dynamic loads. Thirty standard timedependent flight state and control system parameters were used to construct a set of 180 input variables to estimate the main rotor blade normal bending during forward level flight at full speed. Unsupervised nonlinear mapping was used to study the structure of the multidimensional time series from the predictor and target variables. Based on these criteria, black and white box modeling techniques (including ensemble models) for main rotor blade normal bending prediction were applied. They include neural networks, local linear regression and model trees, in combination with genetic algorithms based on residual variance (gamma test) for predictor variables selection. The results from this initial work demonstrate that accurate models for predicting component loads can be obtained using the entire set of predictor variables, as well as with smaller subsets found by computational intelligence based approaches.
Publication date
AffiliationNRC Institute for Information Technology; NRC Institute for Aerospace Research; National Research Council Canada
Peer reviewedNo
NPARC number18150447
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Record identifiere1722e05-3ddc-4f06-853d-4dbb8e30dde1
Record created2011-06-24
Record modified2016-05-09
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