本文關鍵詞：人工電觸覺反饋對手抓握力的影響　出處：《中國康復醫(yī)學雜志》2016年01期 　論文類型：期刊論文

  更多相關文章： 經(jīng)皮電刺激 觸覺反饋 假肢手 抓握力 閉環(huán)控制

【摘要】：目的:為了給受試者提供觸覺反饋來完成抓取力的閉環(huán)控制,提出各種方法和相應的控制策略,以探究觸覺反饋對手抓握力的影響,為假肢手的研究提供參考。方法:主要根據(jù)動態(tài)系統(tǒng)的輸出特性提出了四類考察變量(三種失敗次數(shù)、完成時間、握力的均值和握力的標準差),以及穩(wěn)定性、快速性和經(jīng)濟性指標,依據(jù)上述準則來比較基于經(jīng)皮電刺激的觸覺反饋和無反饋對于控制握力的影響。結果:對于三種失敗次數(shù),無反饋模式下的表現(xiàn)均高于觸覺反饋模式,尤其是在由摔碎和捏碎引起的失敗次數(shù)上,無反饋模式下的結果分別為4.3次和4.9次,而電觸覺反饋模式下的結果僅為0.6次和0.5次。對于反映時間,無反饋模式下的受試者完成實驗的時間為26.4s,而在電觸覺反饋模式下,受試者僅用17.7s。在對6個物體的抓取中,電觸覺反饋下的握力始終小于無反饋模式下的結果。觸覺反饋模式下的等效握力的穩(wěn)定性要高于無反饋模式下的結果。結論:經(jīng)皮電刺激的觸覺反饋在四類考察變量以及3種目標上均優(yōu)于無反饋,提示經(jīng)皮電刺激的觸覺反饋對于假肢手握力控制的重要性。隨著物體重量的增加,無反饋和經(jīng)皮電刺激的觸覺反饋下抓取力的經(jīng)濟性和穩(wěn)定性差異逐漸的減小。
[Abstract]:Objective: in order to provide tactile feedback to the subjects to complete the closed-loop control of grip force, various methods and corresponding control strategies were proposed to explore the impact of tactile feedback on the grip of the opponent. Methods: according to the output characteristics of the dynamic system, four kinds of investigation variables (three kinds of failure times, the time of completion, the mean value of grip strength and the standard deviation of grip strength, and stability) were put forward. According to the above criteria, the effects of tactile feedback and non-feedback on grip control were compared based on the above criteria. Results: for three kinds of failures. The performance of non-feedback mode was higher than that of tactile feedback mode, especially in the failure times caused by crushing and crushing. The results of no-feedback mode were 4.3 times and 4.9 times, respectively. The results of electrotactile feedback mode were only 0.6 and 0.5 times. For the response time, the subjects with no feedback mode completed the experiment for 26.4s, while the subjects in the electrotactile feedback mode completed the experiment. The subjects used 17.7 s. To grab six objects. The grip strength of electrotactile feedback is always lower than that of non-feedback mode. The stability of equivalent grip force in tactile feedback mode is higher than that in non-feedback mode. Conclusion:. The tactile feedback of transcutaneous electrical stimulation was superior to that of no feedback in four types of variables and three targets. It is suggested that the importance of tactile feedback of transcutaneous electrical stimulation for the control of hand grip force of prosthetic limb. With the increase of object weight, the difference of economic and stability of grip force between non-feedback and transdermal electric stimulation under tactile feedback is gradually reduced.
【作者單位】： 上海交通大學機械與動力工程學院;
【基金】：國家973課題(2011CB13305) 國家自然科學基金(51475292) 上海市自然科學基金支持(14ZR1421300)
【分類號】：R318
【正文快照】： 在日常生活中,人手操作物體的靈活性主要體現(xiàn)在對不同特性物體(如:物體的形狀、重量、剛度)的抓取和提升上。人之所以能夠靈活地操作物體,主要是由于人體自身的反饋機制(如:觸覺、視覺)提供抓取相關的信息,輔助人完成復雜的動作[1]。對于反饋機制而言,其更為具體地反映在人對

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