Matches in SemOpenAlex for { <https://semopenalex.org/work/W4376872721> ?p ?o ?g. }
- W4376872721 abstract "Muscles act through elastic and dissipative elements to mediate movement, which can introduce dissipation and filtering which are important for energetics and control. The high power requirements of flapping flight can be reduced by an insect's exoskeleton, which acts as a spring with frequency-independent material properties under purely sinusoidal deformation. However, this purely sinusoidal dynamic regime does not encompass the asymmetric wing strokes of many insects or non-periodic deformations induced by external perturbations. As such, it remains unknown whether a frequency-independent model applies broadly and what implications it has for control. We used a vibration testing system to measure the mechanical properties of isolated Manduca sexta thoraces under symmetric, asymmetric and band-limited white noise deformations. The asymmetric and white noise conditions represent two types of generalized, multi-frequency deformations that may be encountered during steady-state and perturbed flight. Power savings and dissipation were indistinguishable between symmetric and asymmetric conditions, demonstrating that no additional energy is required to deform the thorax non-sinusoidally. Under white noise conditions, stiffness and damping were invariant with frequency, suggesting that the thorax has no frequency-dependent filtering properties. A simple flat frequency response function fits our measured frequency response. This work demonstrates the potential of materials with frequency-independent damping to simplify motor control by eliminating any velocity-dependent filtering that viscoelastic elements usually impose between muscle and wing." @default.
- W4376872721 created "2023-05-18" @default.
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- W4376872721 date "2023-05-01" @default.
- W4376872721 modified "2023-10-14" @default.
- W4376872721 title "Structural damping renders the hawkmoth exoskeleton mechanically insensitive to non-sinusoidal deformations" @default.
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- W4376872721 doi "https://doi.org/10.1098/rsif.2023.0141" @default.
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- W4376872721 hasPublicationYear "2023" @default.
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