Antonsson E K, Mann R W
J Biomech. 1985;18(1):39-47. doi: 10.1016/0021-9290(85)90043-0.
We address amplification of noise in double differentiation of position histories for dynamic analysis of gait. Measurements of the frequency domain characteristics of signal and noise are required to quantitatively assess errors in raw, filtered, and dynamic gait data. The results of a simple technique to determine the frequency content of gait using a population of 12 subjects and a total of 30 gait records is presented.
我们探讨了在步态动态分析中对位置历史进行二次微分时噪声的放大问题。为了定量评估原始、滤波后和动态步态数据中的误差，需要对信号和噪声的频域特征进行测量。本文展示了一种简单技术的结果，该技术使用12名受试者的群体以及总共30条步态记录来确定步态的频率成分。
