基于改进单关节信息传输模型的闭环脑机接口系统设计  

Closed-loop brain-machine interface system design based on improved single-joint information transmission model

作　　者：潘红光[1] 米文毓 邓军 孙京诰[3] 薛瑞 PAN Hong-guang;MI Wen-yu;DENG Jun;SUN Jing-gao;XUE Rui(College of Electronic and Information Engineering,Xi’an University of Science and Technology,Xi’an Shaanxi 710054,China;College of Safety Science and Engineering,Xi’an University of Science and Technology,Xi’an Shaanxi 710054,China;Key Laboratory of Advanced Control and Optimization Technology of Ministry of Education,East China University of Science and Technology,Shanghai 200237,China)

机构地区：[1]西安科技大学电气与控制工程学院,陕西西安710054 [2]西安科技大学安全科学与工程学院,陕西西安710054 [3]华东理工大学教育部先进控制与优化技术重点实验室,上海200237

出　　处：《控制理论与应用》2020年第2期395-404,共10页Control Theory & Applications

基　　金：国家自然科学基金项目(61603295);中国博士后基金项目(2017M623207);陕西省自然科学基础研究计划项目(2018JM6003,2017JM5114);陕西省重点研发计划项目(2017ZDCXL–GY–01–02–03);西安科技大学优秀青年科技基金项目(2018YQ2–07)资助.

摘　　要：近年来,脑机接口(BMI)技术在残疾人肢体功能康复、老年人生活辅助等方面的应用日益广泛.本文以单关节信息传输(SJIT)模型为对象,通过模型改进、设计解码器和辅助控制器构造了闭环脑机接口系统以恢复单关节的运动功能.本文主要工作包括:(1)引入相对速度向量对单关节信息传输模型改进以降低模型输出的超调量,并测试了改进模型的性能;(2)基于改进模型,通过设计基于维纳滤波的解码器、基于预测控制策略的辅助控制器构造了闭环脑机接口系统以恢复缺失的信息通路.离线和在线仿真说明,改进模型的输出性能有较大提升、超调量明显下降;构建的闭环系统很好地实现了对缺失信息通路的恢复和期望轨迹的跟踪,且具有较强的抗干扰性.In recent years,brain-machine interface(BMI)technology has been used more and more widely in physical rehabilitation and life support for the disabled and the elderly.For the the single-joint information transmission(SJIT)model,through the model improvement,the decoder design and the auxiliary controller design,the closed-loop BMI system is formulated in this paper to restore the movement of the single joint.The innovation of this paper mainly includes:(1)the relative velocity vector is introduced to improve the SJIT model to reduce the overshoot,and then the performance of improved model is tested;(2)based on this improved model,a decoder based on Wiener filter and an auxiliary controller based on model predictive control strategy are designed and introduced to restore the missing information loop.The offline and online simulation results show that the improved model can greatly improve the output performance,reduce the overshoot clearly;and the formulated closed-loop system can well restore the missing information loop and track the target trajectory.In addition,the closed-loop system has strong anti-interference capability.

关 键 词：脑机接口 模型改进 解码器设计 闭环系统 预测控制 

分 类 号：TN911.7[电子电信—通信与信息系统] TP273[电子电信—信息与通信工程] R318[自动化与计算机技术—检测技术与自动化装置]