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首页> 外文会议>Bioengineering Conference (NEBEC), 2012 38th Annual Northeast >Assessment of passive knee stiffness and set point
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Assessment of passive knee stiffness and set point

机译：评估被动膝盖的僵硬度和设定点

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The purpose of this study was to identify values of the nonlinear passive knee joint stiffness, Kp, and the passive knee set point angle, θp, that allow inclusion of a term in the equation of motion that is often overlooked in dynamic models. Five healthy subjects were tested using the "Push-Pull Test" in which the leg shank was allowed to come to static equilibrium at its resting angle, θFR, pushed to flexion, allowed to return to θFR, and then pulled to extension. The shank was held motionless for several seconds at 0.2 rad. increments, with the holding angles, θh, seen in the data as plateaus following each change in angle. Data were analyzed to determine the moment due to passive stiffness at each holding angle, the nonlinear stiffness coefficient over the range of movement, and the unique set point of the passive stiffness.
机译：这项研究的目的是确定非线性被动膝关节刚度Kp和被动膝设定点角度θp的值，这些值允许在运动方程中包含经常在动态模型中忽略的项。使用“推拉测试”对五名健康受试者进行了测试，其中让小腿腿在其静止角度θFR达到静态平衡，使其屈曲，使其恢复至θFR，然后拉至伸展。刀柄在0.2 rad下保持静止不动数秒钟。随角度的增加，保持角为θh，在数据中显示为随着每个角度变化而变化的平稳段。分析数据以确定在每个保持角的被动刚度引起的力矩，运动范围内的非线性刚度系数以及被动刚度的唯一设定点。

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