Identification of Gait-Cycle Phases for Prosthesis Control.

Identification of Gait-Cycle Phases for Prosthesis Control.
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DOI:
10.3390/biomimetics6020022
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发表时间:
2021-03-26
期刊:
Biomimetics (Basel, Switzerland)
影响因子:
--
通讯作者:
Vocenas L
Vocenas L
中科院分区:
其他
文献类型:
--
作者:
Di Gregorio R;Vocenas L

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经股动脉假体的主要问题是其补偿膝关节丧失的能力。步态周期时相的识别在这些假肢的控制中起着重要作用。这种控制完全取决于被动假体中的患者,或者部分地由半主动假体中的假体促进。在这两种情况下,患者都通过适当的康复程序恢复他/她的行走能力,旨在重建患者的本体感觉。通过识别条件和参数来理解本体感觉,这些条件和参数使患者意识到下肢身体部分的姿势,而识别当前步态周期的阶段/周期是这种意识的第一步。在这里,提出了一种识别不同行走条件下步态周期阶段/周期的建议,以及一种可能的主动/半主动假肢的控制逻辑。该方案通过负载传感器检测不同的步态周期事件以及不同的行走条件,通过分析步态参数的变化来实现该方案。利用文献中的步态周期数据对所提出的方法进行了验证。该提案假设假肢配备了一个没有活动能力的储能脚部。
The major problem with transfemoral prostheses is their capacity to compensate for the loss of the knee joint. The identification of gait-cycle phases plays an important role in the control of these prostheses. Such control is completely up to the patient in passive prostheses or partly facilitated by the prosthesis in semiactive prostheses. In both cases, the patient recovers his/her walking ability through a suitable rehabilitation procedure that aims at recreating proprioception in the patient. Understanding proprioception passes through the identification of conditions and parameters that make the patient aware of lower-limb body segments’ postures, and the recognition of the current gait-cycle phase/period is the first step of this awareness. Here, a proposal is presented for the identification of the gait-cycle phases/periods under different walking conditions together with a control logic for a possible active/semiactive prosthesis. The proposal is based on the detection of different gait-cycle events as well as on different walking conditions through a load sensor, which is implemented by analyzing the variations in some gait parameters. The validation of the proposed method is done by using gait-cycle data present in the literature. The proposal assumes the prosthesis is equipped with an energy-storing foot without mobility.
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