探索飞行过程中拍打行为与加速度计信号之间的关系，以及一种新的校准方法,IBIS

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探索飞行过程中拍打行为与加速度计信号之间的关系，以及一种新的校准方法
IBIS ( IF 1.8 ) Pub Date : 2019-02-10 , DOI: 10.1111/ibi.12710
Tessa A. Van Walsum ₁ , Andrea Perna ₁ , Charles M. Bishop ₂ , Campbell P. Murn ₃ , Philip M. Collins ₁ , Rory P. Wilson ₄ , Lewis G. Halsey ₁

Affiliation

我们对自由放养鸟类的飞行能量成本知之甚少，部分原因是目前估算野外飞行能量的技术有限。已知加速度计可通过带室呼吸计的跑步机进行校准，通过陆生动物的身体运动来估计能量消耗。具有面罩呼吸测定法的等效风洞是很难激发的，尚未用于校准加速度测定法。我们迈出了探索探索一种用飞行能量消耗校准加速度计的新方法的第一步。我们收集了Harris's Hawks Parabuteo unicinctus的加速度计数据在很小的水平距离上飞行到高达4.1 m的不同高度；从身高原理上可以估算出增加身高所消耗的机械能。加速度测量法和机械能消耗之间的关系很强，尽管简单的机翼拍打模型确认加速度测量法对机翼拍动幅度和频率的变化都敏感，但这种关系主要是通过机翼拍动频率的变化来解释的，而通过变化的变化则较少在幅度上。我们的研究提供了初步的积极证据，表明可以使用爬升飞行通过身体力量来校准加速度计，这可能至少在海拔增加的情况下为估算襟翼飞行代谢率提供基础。

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Exploring the relationship between flapping behaviour and accelerometer signal during ascending flight, and a new approach to calibration

We understand little about the energetic costs of flight in free‐ranging birds, in part because current techniques for estimating flight energetics in the wild are limited. Accelerometry is known to estimate energy expenditure through body movement in terrestrial animals, once calibrated using a treadmill with chamber respirometry. The flight equivalent, a wind tunnel with mask respirometry, is particularly difficult to instigate, and has not been applied to calibrate accelerometry. We take the first steps in exploring a novel method for calibrating accelerometers with flight energy expenditure. We collected accelerometry data for Harris's Hawks Parabuteo unicinctus flying to varying heights up to 4.1 m over a small horizontal distance; the mechanical energy expended to gain height can be estimated from physical first principles. The relationship between accelerometry and mechanical energy expenditure was strong, and while a simple wing flapping model confirmed that accelerometry is sensitive to both changes in wing beat amplitude and frequency, the relationship was explained predominately by changes in wing beat frequency, and less so by changes in amplitude. Our study provides initial, positive evidence that accelerometry can be calibrated with body power using climbing flights, potentially providing a basis for estimating flapping flight metabolic rate at least in situations of altitude gain.

更新日期：2019-02-10

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