功能性电刺激下的关节自适应运动控制研究

吴强; 张琴; 熊蔡华

doi:10.16383/j.aas.2016.c160217

功能性电刺激下的关节自适应运动控制研究

doi: 10.16383/j.aas.2016.c160217

吴强^1,,
张琴^1, ,,
熊蔡华^1,

华中科技大学机械科学与工程学院数字制造装备与技术国家重点实验室武汉 430074

基金项目:

高等学校博士学科点专项科研基金 20130142120086

国家自然科学基金 51335004

国家自然科学基金 51305148

湖北省自然基金 2015CFA004

详细信息

作者简介:
吴强华中科技大学机械科学与工程学院数字制造装备与技术国家重点实验室硕士研究生.主要研究方向为神经肌肉电刺激, 先进控制理论及其应用.E-mail:qiangwu@hust.edu.cn

熊蔡华华中科技大学机械科学与工程学院数字制造装备与技术国家重点实验室教授.1998年于华中理工大学(现华中科技大学)机械电子工程专业获博士学位.主要研究方向为机器人学, 生机电一体化, 康复工程装备.E-mail:chxiong@hust.edu.cn

通讯作者:
张琴华中科技大学机械科学与工程学院数字制造装备与技术国家重点实验室副教授.2011年于法国蒙彼利埃大学自动化系统与微电子专业获博士学位.主要研究方向为计算神经康复, 人机接口, 生物电信号处理.本文通信作者.E-mail:qin.zhang@hust.edu.cn

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出版历程
- 收稿日期: 2016-02-29
- 录用日期: 2016-10-14
- 刊出日期: 2016-12-01

Adaptive Control of Joint Movement Induced by Electrical Stimulation

WU Qiang^1
,,
ZHANG Qin^{1
, ,},
XIONG Cai-Hua^1
,

State Key Laboratory of Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074

Funds:

Specialized Research Fund for the Doctoral Program of Higher Education 20130142120086

National Natural Science Foundation of China 51335004

National Natural Science Foundation of China 51305148

Natural Science Foundation of Hubei Province 2015CFA004

More Information

Author Bio:
Master student at the State Key Laboratory of Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology. His research interest covers neuromuscular electrical stimulation and advanced control theory and applications

Professor at the State Key Laboratory of Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology. He received his Ph. D. degree in mechatronics from Huazhong University of Science and Technology in 1998. His research interest covers robotics, biomechatronics and rehabilitation robot

Corresponding author: ZHANG Qin Associate professor at the State Key Laboratory of Manufacturing Equipment and Technology, School of Mechanical Science and Engineering, Huazhong University of Science and Technology. She received her Ph. D. degree in automation system and microelectronics from University of Montpellier in 2011, France. Her research interest covers computational neurorehabilitation, human-machine interface, and biomedical signal processing. Corresponding author of this paper

摘要

摘要: 针对功能性电刺激（Functional electrical stimulation，FES）下外部干扰和肌肉疲劳对关节运动的影响，提出了一种神经网络自适应滑模控制方法以获得更加精确的关节运动.本文建立了电刺激下的关节运动模型，在此模型的基础上设计了滑模控制律，利用径向基神经网络在线逼近系统不确定特性，并通过Lyapunov方法设计了径向基神经网络的自适应律，以电刺激所产生的膝关节运动控制为例，通过仿真和实验研究验证了该神经网络滑模控制方法相对于传统的滑模控制来说，不仅可以准确地控制电刺激而获得期望的关节运动，而且当关节运动受到外部干扰和肌肉疲劳的影响时，还可自适应地对此进行补偿，有效地调节电刺激强度以获得准确的关节运动.
- 神经网络滑模控制 /
- 肌肉疲劳 /
- 运动控制 /
- 功能性电刺激
Abstract: This paper presents a neuro sliding mode control method of electrical stimulation for accurate electrically-induced joint movement by compensating the effects of external disturbances and muscle fatigue during stimulation. The sliding mode control law is rested on an electrically-induced musculoskeletal model. The adaptive control law of the radial basis function network which is used to approximate system modeling uncertainties is derived through the Lyapunov function. This proposed method is evaluated by adaptive control of electrical stimulation to achieve expected knee movements, especially in the presence of external disturbances and muscle fatigue. Both simulation and experimental studies indicate that the proposed adaptive control method is effective and feasible to compensate deviations of joint movement resulting from external disturbances and muscle fatigue.
- Neuro sliding mode control /
- muscle fatigue /
- movement control /
- functional electrical stimulation (FES)
注释:

1) 本文责任编委王卫群

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图 1 实验示意图

Fig. 1 Experimental set-up

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图 2 神经网络滑模控制控制系统

Fig. 2 Structure of neuro-SMC control system

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图 3 稳态响应仿真结果

Fig. 3 Simulation result of steady-state response

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图 4 扰动仿真结果

Fig. 4 Simulation result of disturbance test

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图 5 疲劳仿真结果

Fig. 5 Simulation result of muscle fatigue test

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图 6 膝关节电刺激实验图

Fig. 6 Experiment set-up

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图 7 自由摆动测试结构验证

Fig. 7 Identiflcation result through freely swing test

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图 8 稳态响应实验对比

Fig. 8 Experimental comparison of steady-state response

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图 9 神经滑模控制的扰动实验结果

Fig. 9 Control performance of neuro-SMC in disturbance test

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图 10 疲劳实验前后神经滑模控制阶跃响应结果

Fig. 10 Control performance of neuro-SMC in step response in fatigue test

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图 11 疲劳实验中neuro-SMC正弦响应结果

Fig. 11 Control performance of neuro-SMC in sinusoidal response in fatigue test

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表 1 膝关节模型参数

Table 1 The parameters of knee joint model

参数	受试者
身高	168 cm
体重	54 kg
J	0.256 kg · m²
m	2.91 kg
l	260.4 mm
B	0.19 Nm · s/rad
λ	2.47 Nm/rad
θ₀	0.09 rad
${\hat b}$	0.02 Nm/μs

下载: 导出CSV

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