Doyle, R. and Harris, C.J.
Multi-Sensor Data Fusion for Helicopter Guidance using Neuro-Fuzzy Estimation Algorithms.
The role of Intelligent Systems in Defence
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The purpose of this paper is to describe an approach that performs data fusion on the output of multiple spatially separate sensors engaged in the real time tracking of obstacles in a helicopter's environment. The generated information could be used either as a flight control pilot aid or as the feedback required by an autonomous aircraft. Obstacle track estimation has been commonly carried out using the Kalman Filter, a linear estimator, or one of its variations. The Extended Kalman Filter, one such variation designed for use on non-linear problems, produces the best linear approximation to the object track. However certain assumptions made in the derivation of these algorithms render them sub-optimal for aerial obstacle track estimation. Work produced by University of Southampton has highlighted a link between fuzzy networks and associative memory neural networks. This link is important as it allows new learning rules to be developed for training fuzzy rules, and the conditions under which convergence can be proved to be derived. This paper will explore methods for the fusion of estimates using these neurofuzzy models, and also address some of the weakness of the Kalman filter approximation introduced by the assumptions made in its derivation.
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