Bumblebees minimize control challenges by combining active and passive modes in unsteady winds

Ravi, S, Kolomenskiy, D, Engels, T, Schneider, K, Wang, C, Sesterhenn, J and Liu, H 2016, 'Bumblebees minimize control challenges by combining active and passive modes in unsteady winds', Scientific Reports, vol. 6, pp. 1-10.


Document type: Journal Article
Collection: Journal Articles

Title Bumblebees minimize control challenges by combining active and passive modes in unsteady winds
Author(s) Ravi, S
Kolomenskiy, D
Engels, T
Schneider, K
Wang, C
Sesterhenn, J
Liu, H
Year 2016
Journal name Scientific Reports
Volume number 6
Start page 1
End page 10
Total pages 10
Publisher Nature Publishing Group
Abstract The natural wind environment that volant insects encounter is unsteady and highly complex, posing significant flight-control and stability challenges. It is critical to understand the strategies insects employ to safely navigate in natural environments. We combined experiments on free flying bumblebees with high-fidelity numerical simulations and lower-order modeling to identify the mechanics that mediate insect flight in unsteady winds. We trained bumblebees to fly upwind towards an artificial flower in a wind tunnel under steady wind and in a von Kármán street formed in the wake of a cylinder. Analysis revealed that at lower frequencies in both steady and unsteady winds the bees mediated lateral movement with body roll - typical casting motion. Numerical simulations of a bumblebee in similar conditions permitted the separation of the passive and active components of the flight trajectories. Consequently, we derived simple mathematical models that describe these two motion components. Com parison between the free-flying live and modeled bees revealed a novel mechanism that enables bees to passively ride out high-frequency perturbations while performing active maneuvers at lower frequencies. The capacity of maintaining stability by combining passive and active modes at different timescales provides a viable means for animals and machines to tackle the challenges posed by complex airflows.
Subject Aerospace Engineering not elsewhere classified
DOI - identifier 10.1038/srep35043
Copyright notice © The Author(s) 2016
ISSN 2045-2322
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