Naslov
A Computational Approach to Parameter Identification of Spatially Distributed Nonlinear Systems with Unknown Initial Conditions

Autori
Kasać, Josip ; Milić, Vladimir ; Stepanić, Josip ; Mester, Gyula

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
2014 IEEE Symposium Series on Computational Intelligence / - : Institute of Electrical and Electronics Engineers (IEEE), 2014

ISBN
978-1-4799-4465-1

Skup
IEEE Symposium Series on Computational Intelligence

Mjesto i datum
Orlando (FL), Sjedinjene Američke Države, 09.12.2014. - 12.12.2014

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Spatially Distributed Nonlinear Systems; Parameter Identification; Dynamic Optimization

Sažetak
In this paper, a high-precision algorithm for parameter identification of nonlinear multivariable dynamic systems is proposed. The proposed computational approach is based on the following assumptions: a) system is nonlinearly parameterized by a vector of unknown system parameters ; b) only partial measurement of system state is available ; c) there are no state observers ; d) initial conditions are unknown except for measurable system states. The identification problem is formulated as a continuous dynamic optimization problem which is discretized by higher-order Adams method and numerically solved by a backward-in-time recurrent algorithm which is similar to the backpropagation-through-time (BPTT) algorithm. The proposed algorithm is especially effective for identification of homogenous spatially distributed nonlinear systems what is demonstrated on the parameter identification of a multi-degree-of-freedom torsional system with nonlinearly parameterized elastic forces, unknown initial velocities and positions measurement only.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

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