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Core reactivity estimation in space reactors using recurrent dynamic networksA recurrent multilayer perceptron network topology is used in the identification of nonlinear dynamic systems from only the input/output measurements. The identification is performed in the discrete time domain, with the learning algorithm being a modified form of the back propagation (BP) rule. The recurrent dynamic network (RDN) developed is applied for the total core reactivity prediction of a spacecraft reactor from only neutronic power level measurements. Results indicate that the RDN can reproduce the nonlinear response of the reactor while keeping the number of nodes roughly equal to the relative order of the system. As accuracy requirements are increased, the number of required nodes also increases, however, the order of the RDN necessary to obtain such results is still in the same order of magnitude as the order of the mathematical model of the system. It is believed that use of the recurrent MLP structure with a variety of different learning algorithms may prove useful in utilizing artificial neural networks for recognition, classification, and prediction of dynamic systems.
Document ID
19930029906
Document Type
Conference Paper
Authors
Parlos, Alexander G. (Texas A & M Univ. College Station, United States)
Tsai, Wei K. (California Univ. Irvine, United States)
Date Acquired
August 15, 2013
Publication Date
January 1, 1991
Publication Information
Publication: In: Space nuclear power systems; Proceedings of the 8th Symposium, Albuquerque, NM, Jan. 6-10, 1991. Pt. 3 (A93-13751 03-20)
Subject Category
CYBERNETICS
Funding Number(s)
CONTRACT_GRANT: DE-FG07-89ER-12893
CONTRACT_GRANT: NAG9-347
Distribution Limits
Public
Copyright
Other