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Energetic and Control Trade-offs in Spring-Wing Systems by Lynch, James; Wold, Ethan S.; Gau, Jeff; Sponberg, Simon; Gravish, Nick is a scholarly article available to read on EtoBox.

What is Energetic and Control Trade-offs in Spring-Wing Systems about?

Flying insects are thought to achieve energy-efficient flapping flight by storing and releasing elastic energy in their muscles, tendons, and thorax. However, flight systems consisting elastic elements coupled to nonlinear, unsteady aerodynamic forces also present possible challenges to generating steady and responsive wing motions. In previous work, we examined the resonance properties of a dynamically-scaled robophysical system consisting of a rigid wing actuated by a motor in series with a spring, which we call a spring-wing system \cite{Lynch2021-ri}. In this paper, we seek to better understand the effects of perturbations on resonant systems via a non-dimensional parameter, the Weis-Fogh number. We drive a spring-wing system at a fixed resonant frequency and study the response to an internal control perturbation and an external aerodynamic perturbation with varying Weis-Fogh number. In our first experiments, we provide a step change in the input forcing amplitude and study the wing motion response. In our second experiments we provide an external fluid flow directed at the flapping wing and study the perturbed steady-state wing motion. We evaluate results across the Weis-Fogh

Author

Lynch, James; Wold, Ethan S.; Gau, Jeff; Sponberg, Simon; Gravish, Nick

Published

2024

Language

EN