【摘要】：為了科學評價人體站立平衡能力,本文基于混沌系統(tǒng)非線性分析理論,提出了一種新的評價方法。該方法利用運動平臺對受試者足底施加前后方向正弦式運動刺激,采用三個加速度傳感器固定于受試者肩、髖、膝,采集人體平衡調(diào)節(jié)的動態(tài)數(shù)據(jù)。通過重構系統(tǒng)的相空間,計算得到受試者不同體段動態(tài)數(shù)據(jù)的最大Lyapunov指數(shù)(LLE),用LLE的差值平方和(SSDLLE)作為平衡能力的評價指標。最后用該方法計算了20位受試者的平衡指標,并與傳統(tǒng)評價方法的結果進行對比,結果表明SSDLLE較為符合受試者的平衡表現(xiàn),可以在一定程度上用于評測人體的平衡能力。此外,結果還表明人體各個關節(jié)的協(xié)調(diào)能力決定了平衡能力的優(yōu)劣;各體段的混沌特性的差異與個體的站立平衡能力是存在相關性的。
[Abstract]:In order to evaluate the standing balance ability of human body scientifically, a new evaluation method based on nonlinear analysis theory of chaotic system is proposed in this paper. In this method, three acceleration sensors were used to fix the shoulder, hip and knee of the subjects, and the dynamic data of human balance regulation were collected by using the motion platform to apply the forward and back direction sine motion stimuli to the foot of the subjects. By reconstructing the phase space of the system, the maximum Lyapunov index (LLE),) of the dynamic data of different segments of the subjects is calculated and the differential square sum of LLE (SSDLLE) is used as the evaluation index of the equilibrium ability. Finally, the balance index of 20 subjects was calculated by this method, and compared with the results of traditional evaluation method. The results showed that SSDLLE was more consistent with the equilibrium performance of subjects and could be used to evaluate the balance ability of human body to a certain extent. In addition, the results also show that the coordination ability of each joint determines the balance ability, and the difference of chaotic characteristics of each body segment is related to the individual standing balance ability.
【作者單位】： 燕山大學電氣工程學院;河北大學電子信息工程學院;保定市第一中心醫(yī)院中醫(yī)骨科;
【基金】：國家自然科學基金資助項目(61074175)
【分類號】：R33;TP212
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本文編號：2449962