DocumentCode :
2234040
Title :
An ADALINE neural network with truncated momentum for system identification of linear time varying systems
Author :
Kim, Jung H. ; Zhang, Wenle ; Ryu, Seung-Ki ; Oh, Yoon-Seuk
Author_Institution :
Dept. of Syst. Eng., Univ. of Arkansas at Little Rock, Little Rock, AR, USA
fYear :
2012
fDate :
19-21 March 2012
Firstpage :
292
Lastpage :
297
Abstract :
This paper presents a new version of online identification method for linear time varying systems based on the ADaptive LINear Element - ADALINE (Widrow and Lehr, 1990 ) neural network with a truncated momentum term added for the purpose of reducing fluctuation while sudden parameter change happens thus offers a smoother transition in tracking the parameter. It is well known ADALINE is slow in convergence which is not appropriate for online application and identification of time varying system. To speed up convergence of learning and thus increase the capability of tracking time varying system parameters, our previous work added a momentum term to the weight adjustment. While the momentum does speed up convergence, it also shows over-shooting or oscillating and also tracks noise closely. To help to reduce this effect, we propose a truncated version of the momentum term to track variable parameters better and track noise less. Simulation results show that the proposed method provides indeed fast yet smoother convergence and better tracking of time varying parameters.
Keywords :
adaptive control; convergence; learning systems; linear systems; neurocontrollers; time-varying systems; adaptive linear element neural network; fluctuation reduction; learning convergence; linear time varying system; online application; online identification method; time varying system identification; time varying system parameter tracking; truncated momentum; Abstracts; Acceleration; Switches; ADALINE; System identification; feedback; neural network; truncated momentum;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industrial Technology (ICIT), 2012 IEEE International Conference on
Conference_Location :
Athens
Print_ISBN :
978-1-4673-0340-8
Type :
conf
DOI :
10.1109/ICIT.2012.6209953
Filename :
6209953
Link To Document :
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