Driving a musculoskeletal model with inertial and magnetic measurement units
Driving a musculoskeletal model with inertial and magnetic measurement units
复制标题
使用惯性和磁性测量单元驱动肌肉骨骼模型
DOI：
--
复制
发表时间：
2015
影响因子：
1.6
通讯作者：
B. Koopman
中科院分区：
文献类型：
--
作者：
B. Koning;M. M. van der Krogt;C. Baten;B. Koopman
我们使用动态惯性和磁性测量单元 (IMMU) 开发并评估了一种用于肌肉骨骼模型的新运动驱动器。新驱动程序使用基于每个单独 IMMU 的传感器融合的方向估计，并受益于肌肉骨骼模型的两个重要属性。首先，这些模型比目前用于多个 IMMU 传感器融合的模型包含更复杂的解剖学、运动学模型，并且不断得到改进。其次，它们允许分段和测量传感器之间的移动。对于三个不同的任务，使用新的 IMMU 驱动程序、（光学）标记驱动程序以及两者的组合来重建运动。发现髋关节相对于银标准（组合 IMMU/标记驱动器）的最大均方根 (RMS) 关节角度差异；对于 IMMU 驱动的重建，在下蹲、步态和滑板任务期间分别为 4°、2° 和 5°，而对于标记驱动的重建则分别为 6°、5° 和 5°。测量的角速度与 IMMU 驱动的重建最一致，最大 RMS 差异为 66°/s，而标记驱动的重建和银标准的最大 RMS 差异为 108°/s 和 91°/s。然而，在 IMMU 驱动的重建过程中，全局加速度出现较大振荡，导致测量加速度的最大 RMS 差异为 23 m/s2，而包含标记驱动器的重建则为 9 m/s2。新的驱动程序有助于在当前可用的生物力学模型中直接实施基于 IMMU 的方向估计。因此，它可以帮助快速扩展基于户外测量的生物力学分析。
We developed and evaluated a new kinematic driver for musculoskeletal models using ambulatory inertial and magnetic measurement units (IMMUs). The new driver uses the orientation estimates based on sensor fusion of each individual IMMU and benefits from two important properties of musculoskeletal models. First, these models contain more complex, anatomical, kinematic models than those currently used for sensor fusion of multiple IMMUs and are continuously improved. Second, they allow movement between segment and measured sensor. For three different tasks, the new IMMU driver, (optical) marker drivers and a combination of both were used to reconstruct the motion. Maximal root mean square (RMS) joint angle differences with respect to the silver standard (combined IMMU/marker drivers) were found for the hip joint; 4°, 2° and 5° during squat, gait and slideboard tasks for IMMU-driven reconstructions, compared with 6°, 5° and 5° for marker-driven reconstructions, respectively. The measured angular velocities corresponded best to the IMMU-driven reconstructions, with a maximal RMS difference of 66°/s, compared with 108°/s and 91°/s for marker-driven reconstructions and silver standard. However, large oscillations in global accelerations occurred during IMMU-driven reconstructions resulting in a maximal RMS difference with respect to measured acceleration of 23 m/s2, compared with 9 m/s2 for reconstructions that included marker drivers. The new driver facilitates direct implementation of IMMU-based orientation estimates in currently available biomechanical models. As such, it can help in the rapid expansion of biomechanical analysis based on outdoor measurements.
影响因子：
2.4
作者：
Alexander, EJ;Andriacchi, TP
通讯作者：
Andriacchi, TP
用于手部运动测量的超声波飞行时间系统。
DOI：
10.1088/0967-3334/16/4/001
发表时间：
1995
期刊：
Physiological measurement.
影响因子：
--
作者：
Berners,AC;Webster,JG;Worringham,CJ;Stelmach,GE
通讯作者：
Stelmach,GE