Estimation of Nonlinear Contributions in Human Controller Frequency Response Functions

Saskia Wagenaar, Daan Pool, Herman Damveld, Rene van Paassen, Max Mulder

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

1 Citation (Scopus)
28 Downloads (Pure)

Abstract

Traditional Frequency Response Function (FRF) estimation techniques used for analysis of Human Controller (HC) dynamics in tracking tasks assume HC dynamics to be linear, but generally do not quantify or compensate for the effects of human nonlinearities. The robust and fast Best Linear Approximation (BLA) techniques for estimating an FRF do provide such quantification of nonlinear distortions caused by Period-In-Same-Period-Out (PISPO) nonlinearities and can reduce the effect of PISPO nonlinear operations on the FRF estimate. This paper investigates the application of these BLA techniques to both measured and simulated HC data. For the simulated data, a linear HC model was deliberately extended with a symmetric PISPO deadzone nonlinear operator and a realistic level of HC “remnant” noise. Overall, both the measured and the simulated data indicate that due to the high levels of remnant noise inherent to HC data, no consistent estimate of PISPO nonlinear contributions could be made. This also means that the improvement of using BLA techniques and averaging over multiple forcing function realizations does not result in a substantial improvement over the current practice of estimating HC FRFs from repeated measurements of a single forcing function.
Original languageEnglish
Title of host publicationProceedings of the IEEE International Conference on Systems, Man, and Cybernetics
Subtitle of host publicationMyazaki, Japan, 2018
Pages3424-3429
DOIs
Publication statusPublished - 2018
EventSMC 2018: IEEE International Conference on Systems, Man, and Cybernetics - Myazaki, Japan
Duration: 7 Oct 201810 Oct 2018
http://www.smc2018.org/

Conference

ConferenceSMC 2018: IEEE International Conference on Systems, Man, and Cybernetics
Abbreviated titleSMC 2108
CountryJapan
CityMyazaki
Period7/10/1810/10/18
Internet address

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