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  Effects of Target Signal Shape and System Dynamics on Feedforward in Manual Control

Drop, F., Pool, D., van Paassen, M., Mulder, M., & Bülthoff, H. (2019). Effects of Target Signal Shape and System Dynamics on Feedforward in Manual Control. IEEE Transactions on Cybernetics, 49(3), 768-780. doi:10.1109/TCYB.2017.2783952.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0002-4756-E Version Permalink: http://hdl.handle.net/21.11116/0000-0003-04D3-A
Genre: Journal Article

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 Creators:
Drop, FM1, 2, Author              
Pool, DM, Author              
van Paassen, MM, Author
Mulder, M, Author
Bülthoff, HH1, 2, Author              
Affiliations:
1Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              

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 Abstract: The human controller (HC) in manual control of a dynamical system often follows a visible and predictable reference path (target). The HC can adopt a control strategy combining closed-loop feedback and an open-loop feedforward response. The effects of the target signal waveform shape and the system dynamics on the human feedforward dynamics are still largely unknown, even for common, stable, vehicle-like dynamics. This paper studies the feedforward dynamics through computer model simulations and compares these to system identification results from human-in-the-loop experimental data. Two target waveform shapes are considered, constant velocity ramp segments and constant acceleration parabola segments. Furthermore, three representative vehicle-like system dynamics are considered: 1) a single integrator (SI); 2) a second-order system; and 3) a double integrator. The analyses show that the HC utilizes a combined feedforward/feedback control strategy for all dynamics with the parabola target, and for the SI and second-order system with the ramp target. The feedforward model parameters are, however, very different between the two target waveform shapes, illustrating the adaptability of the HC to task variables. Moreover, strong evidence of anticipatory control behavior in the HC is found for the parabola target signal. The HC anticipates the future course of the parabola target signal given extensive practice, reflected by negative feedforward time delay estimates.

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 Dates: 2018-012019-03
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1109/TCYB.2017.2783952
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Title: IEEE Transactions on Cybernetics
Source Genre: Journal
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Publ. Info: New York, NY, USA : Institute of Electrical and Electronics Engineers
Pages: - Volume / Issue: 49 (3) Sequence Number: - Start / End Page: 768 - 780 Identifier: ISSN: 2168-2267