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Frequency-shifting-based stable on-line algebraic parameter identification of linear systems (CROSBI ID 237651)

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Kasać, Josip ; Žilić, Tihomir ; Milić, Vladimir ; Jokić, Andrej Frequency-shifting-based stable on-line algebraic parameter identification of linear systems // Journal of the franklin institute-engineering and applied mathematics, 355 (2018), 18; 9224-9244. doi: 10.1016/j.jfranklin.2017.03.008

Podaci o odgovornosti

Kasać, Josip ; Žilić, Tihomir ; Milić, Vladimir ; Jokić, Andrej

engleski

Frequency-shifting-based stable on-line algebraic parameter identification of linear systems

In this paper a new approach to algebraic parameter identification of the linear SISO systems is proposed. The standard approach to the algebraic parameter identification is based on the algebraic derivatives in Laplace domain as the main tool for algebraic manipulations like elimination of the initial conditions and generation of linearly independent equations. This approach leads to the unstable time-varying state-space realization of the filters for the on-line parameter estimation. In this paper, the finite difference and shift operators in combination with the frequency-shifting property of Laplace transform is applied instead of algebraic derivatives. Resulting state-space realization of the estimator filters is asymptotically stable and doesn’t require switch-of mechanism to prevent overflow of the estimator variables. The proposed method is especially suitable for applications in closed-loop on-line identification where the stable behavior of the estimators is a necessary requirement. The efficiency of the proposed algorithm is illustrated on three simulation examples.

Algebraic identification ; Parameter identification ; Linear systems ; Operational calculus

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Podaci o izdanju

355 (18)

2018.

9224-9244

objavljeno

0016-0032

10.1016/j.jfranklin.2017.03.008

Trošak objave rada u otvorenom pristupu

APC

Povezanost rada

Strojarstvo

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