New results in feedback control of unsupported standing in paraplegia
New results in feedback control of unsupported standing in paraplegia
复制标题
截瘫无支撑站立反馈控制新结果
DOI：
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发表时间：
2004
影响因子：
4.9
通讯作者：
D. Wood
中科院分区：
文献类型：
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作者：
H. Gollee;K. Hunt;D. Wood
本研究的目的是实施一种新方法来反馈控制无支撑站立，并在完整和截瘫受试者的测试中对其进行评估。在我们的设置中，脚踝上方的所有关节都受到支撑，脚踝处的稳定扭矩是通过跖屈肌的电刺激产生的。之前的一项研究表明，截瘫患者可以实现短时间的无支撑站立。为了提高一致性和可靠性并延长站立时间，我们对控制策略进行了多次修改。其中包括简化的控制结构和不同的控制器设计方法。虽然站立的可靠性主要受到肌肉特征的限制，例如力量减弱和进行性疲劳，但本文提供的结果表明，新策略允许截瘫患者无支撑站立时间更长（长达几分钟）。
The aim of this study was to implement a new approach to feedback control of unsupported standing and to evaluate it in tests with an intact and a paraplegic subject. In our setup, all joints above the ankles are braced and stabilizing torque at the ankle is generated by electrical stimulation of the plantarflexor muscles. A previous study showed that short periods of unsupported standing with a paraplegic subject could be achieved. In order to improve consistency and reliability and to prolong the duration of standing, we have implemented several modifications to the control strategy. These include a simplified control structure and a different controller design method. While the reliability of standing is mainly limited by the muscle characteristics such as reduced strength and progressive fatigue, the results presented here show that the new strategy allows much longer periods (up to several minutes) of unsupported standing in paraplegia.