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首页> 外文期刊>Journal of the Mechanics and Physics of Solids >An accelerometer-only algorithm for determining the acceleration field of a rigid body, with application in studying the mechanics of mild traumatic brain injury
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An accelerometer-only algorithm for determining the acceleration field of a rigid body, with application in studying the mechanics of mild traumatic brain injury

机译：仅用于确定刚体加速度的加速度计算法，用于研究轻度创伤性脑损伤的机制

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摘要

We present an algorithm for determining the acceleration field of a rigid body using measurements from four tri-axial accelerometers. The acceleration field is an important quantity in bio-mechanics problems, especially in the study of mild traumatic brain injury (mTBI). The in vivo strains in the brain, which are hypothesized to closely correlate with brain injury, are generally not directly accessible outside of a laboratory setting. However, they can be estimated on knowing the head's acceleration field. In contrast to other techniques, the proposed algorithm uses data exclusively from accelerometers, rather than from a combination of accelerometers and gyroscopes. For that reason, the proposed ac-celerometer only (AO) algorithm does not involve any numerical differentiation of data, which is known to greatly amplify measurement noise. For applications where only the magnitude of the acceleration vector is of interest, the algorithm is straightforward, computationally efficient and does not require computation of angular velocity or orientation. When both the magnitude and direction of acceleration are of interest, the proposed algorithm involves the calculation of the angular velocity and orientation as intermediate steps. In addition to helping understand the mechanics of mTBI, the AO-algorithm may find widespread use in several bio-mechanical applications, gyroscope-free inertial navigation units, ballistic platform guidance, and platform control.
机译：我们介绍了一种用于使用来自四个三轴加速度计的测量来确定刚体的加速场的算法。加速度是生物力学问题的重要数量，特别是在轻度创伤性脑损伤（MTBI）的研究中。脑中的体内菌株，被假设与脑损伤密切相关，通常不能直接接近实验室环境。但是，他们可以估计知道头的加速度领域。与其他技术相比，所提出的算法专门从加速度计使用数据，而不是从加速度计和陀螺仪的组合使用。因此，所提出的AC-Celerometer仅（AO）算法不涉及数据的任何数值分化，这已知可以大大放大测量噪声。对于仅加速度向量的幅度感兴趣的应用，该算法很简单，计算效率，并且不需要计算角速度或取向。当加速度的幅度和方向感兴趣时，所提出的算法涉及计算角速度和方向作为中间步骤。除了帮助了解MTBI的机制之外，AO算法还可以在几种生物机械应用中，陀螺仪惯性导航单元，弹道平台指导和平台控制中广泛使用。

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