An accelerometer-only algorithm for determining the acceleration field of a rigid body, with application in studying the mechanics of mild Traumatic Brain Injury
| Autor: | Mohammad Masiur Rahaman, Alice Lux Fawzi, Haneesh Kesari, Wenqiang Fang, Yang Wan |
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| Rok vydání: | 2019 |
| Předmět: |
Computer science
Computation FOS: Physical sciences Angular velocity Physics - Classical Physics 02 engineering and technology Accelerometer 01 natural sciences 010305 fluids & plasmas law.invention Acceleration law Orientation (geometry) 0103 physical sciences Inertial navigation system Mechanical Engineering Classical Physics (physics.class-ph) Gyroscope Mechanics 021001 nanoscience & nanotechnology Condensed Matter Physics Rigid body Physics - Medical Physics Mechanics of Materials Medical Physics (physics.med-ph) 0210 nano-technology Algorithm |
| DOI: | 10.48550/arxiv.1911.09556 |
| Popis: | 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 accelerometer 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. Comment: 35 pages, 7 figures |
| Databáze: | OpenAIRE |
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