Barin K
Department of Otolaryngology, Ohio State University, Columbus 43210.
Biol Cybern. 1989;61(1):37-50. doi: 10.1007/BF00204758.
A two-step identification method is used to evaluate a generalized model of human postural control in the sagittal plane. Postural dynamics are represented as a planar open-chain linkage system supported by a triangular foot. The control mechanism is modeled as a state feedback element in which the torque acting at a given link is an arbitrary function of the state variables--angles and angular velocities. To validate the approach, six normal subjects underwent two series of experiments. The first series were used to determine an appropriate model of the system dynamics. The second series were used to estimate the parameters of the feedback model. A computer simulation of the complete system shows that the model predictions closely match the observed responses. These results suggest that the proposed model provides a useful framework for analysis of postural control mechanisms.
采用一种两步识别方法来评估矢状面内人体姿势控制的广义模型。姿势动力学被表示为由三角脚支撑的平面开链连杆系统。控制机制被建模为一个状态反馈元件，其中作用在给定连杆上的扭矩是状态变量（角度和角速度）的任意函数。为了验证该方法，六名正常受试者进行了两组实验。第一组用于确定系统动力学的合适模型。第二组用于估计反馈模型的参数。对整个系统的计算机模拟表明，模型预测与观察到的响应紧密匹配。这些结果表明，所提出的模型为姿势控制机制的分析提供了一个有用的框架。
