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Associative memory approach to the identification of structural and mechanical systems


This paper presents a new method for identification of parameters in nonlinear structural and mechanical systems in which the initial guesses of the unknown parameter vectors may be far from their true values. The method uses notions from the field of artificial neural nets and, using an initial set of training parameter vectors, generates in an adaptive fashion other relevant training vectors to yield identification of the parameter vector in a recursive fashion. The simplicity and power of the technique are illustrated by considering three highly nonlinear systems. It is shown that the technique presented here yields excellent estimates with only a limited amount of response data, even when each element of the set comprising the initial training parameter vectors is far from its true value—in fact, sufficiently far that the usual recursive identification schemes fail to converge.

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Kalaba, R.E., Udwadia, F.E. Associative memory approach to the identification of structural and mechanical systems. J Optim Theory Appl 76, 207–223 (1993).

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Key Words

  • Parameter identification
  • nonlinear mechanical and structural systems
  • associative memory
  • adaptive training
  • recursive memory matrix