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首页> 外文会议>Annual International Conference of the IEEE Engineering in Medicine and Biology Society >A Biomechanical Model of Human Ankle Angle Changes Arising From Short Peri-Threshold Anterior Translations of Platform on Which a Subject Stands
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A Biomechanical Model of Human Ankle Angle Changes Arising From Short Peri-Threshold Anterior Translations of Platform on Which a Subject Stands

机译：来自课程站立的平台短阈值前译的人踝角变化的生物力学模型

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This study modeled ankle angle changes during small forward perturbations of a standing platform. A two-dimensional biomechanical inverted pendulum model was developed that uses sway frequencies derived from quiet standing observations on a subject''s Anterior Posterior Center of Pressure (APCoP) to track ankle angle changes during a 16 mm anterior displacement perturbation of a platform on which a subject stood. This model used the total torque generated at the ankle joint as one of the inputs, and calculated it assuming a PID controller. This feedback system generated a simulated ankle torque based on the angular position of the center of mass (CoM) with respect to vertical line passing through the ankle joint. This study also assumed that the internal components of the net torque were only a controller torque and a sway-pattern-generating torque. The final inputs to the model were the platform acceleration and anthropometric terms. This model of postural sway dynamics predicted sway angle and the trajectory of the center of mass. Knowing these relationships can advance an understanding of the ankle strategy employed in balance control.
机译：在一个常设平台的小前锋扰动这项研究为蓝本的脚踝角度变化。二维生物力学倒立摆模型的开发，使用的平台的16毫米前移位扰动期间摇摆上的被摄体压力'的前后位中心（APCoP）站在观测跟踪踝角度的改变从安静产生的频率在其上主题站。该模型用于在踝关节作为输入一个产生的总扭矩，并计算出它假定一个PID控制器。这种反馈系统产生基于质量（COM）相对于穿过踝关节垂直线的中心的角度位置的模拟脚踝扭矩。这项研究还假定净扭矩的内部部件只有一个控制器转矩和摇摆图案产生转矩。最后输入到模型中的平台加速度和人体条款。重心摆动动力学的该模型预测的摇摆角和质心的轨迹。了解这些关系可以推进平衡控制采用的脚踝战略的理解。

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