6533b835fe1ef96bd129fe70

RESEARCH PRODUCT

Fractional-Order System Identification of Viscoelastic Behavior: A Frequency Domain Based Experimental Study

Christoph WeiseJohann RegerDaniela KappMichael Ruderman

subject

0209 industrial biotechnologyComputer scienceFractional-order system02 engineering and technologyVariation of parametersTransfer functionViscoelasticitySet (abstract data type)Identification (information)020303 mechanical engineering & transports020901 industrial engineering & automation0203 mechanical engineeringFrequency domainA priori and a posterioriAlgorithm

description

In this work, the fractional-order modeling of viscoelastic behavior is investigated based on measurement data in the frequency domain. For the results of two different test setups we apply existing parameter estimation algorithms designed for fractional-order transfer functions. These algorithms require a priori knowledge of the system structure including the commensurate order of differentiation. An iterative procedure is used to evaluate the influence of the unknown structure. The measured polymer samples show a viscoelastic stress response. We can show that integer-order models are not capable of capturing this behavior. For a set of predefined structures, the best obtained fractional-order models, however, show a significant variation of parameters. The chosen structure also depends on the used algorithm, therefore additional considerations have to be included in the identification process to generate reliable physical models.

yearjournalcountryeditionlanguage
2020-09-142020 IEEE 16th International Workshop on Advanced Motion Control (AMC)
https://doi.org/10.1109/amc44022.2020.9244449