15th Triennial World Congress of the International Federation of Automatic Control
  Barcelona, 21–26 July 2002 
STOCHASTIC APPROACHES TO DYNAMIC NEURAL NETWORK TRAINING. ACTUATOR FAULT DIAGNOSIS STUDY
Krzysztof Patan* Thomas Parisini**
* Institute of Control and Computation Engineering,
University of Zielona Góra,
ul. Podgórna 50, 65-246 Zielona Góra, Poland
K.Patan@issi.uz.zgora.pl
** Dept. of Electrical, Electronic and Computer Engineering
DEEI-University of Trieste
Via Valerio 10, 34127 Trieste, Italy
parisini@univ.trieste.it

A paper deals with application of stochastic methods for dynamic neural network training. The considered network is composed of dynamic neurons, which contain inner feedbacks. This network can be used as a part of a fault diagnosis system to generate residuals. Up-to-date training algorithms, based on the classical back propagation, suffer from entrapment in local minima of an error function. Two stochastic algorithms are tested as training algorithms to overcome these difficulties. Efficiency of the proposed learning methods is checked using data recorded at Lublin Sugar Factory, Poland.
Keywords: Actuators, dynamic modelling, fault detection, learning algorithms, neural network models
Session slot T-We-M10: Fault Diagnosis of Actuator Systems/Area code 7e : Fault Detection, Supervision and Safety of Technical Processes