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Blending of brain-machine interface and vision-guided autonomous robotics improves neuroprosthetic arm performance during grasping
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نویسنده
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downey j.e. ,weiss j.m. ,muelling k. ,venkatraman a. ,valois j.-s. ,hebert m. ,bagnell j.a. ,schwartz a.b. ,collinger j.l.
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منبع
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journal of neuroengineering and rehabilitation - 2016 - دوره : 13 - شماره : 1
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چکیده
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Background: recent studies have shown that brain-machine interfaces (bmis) offer great potential for restoring upper limb function. however,grasping objects is a complicated task and the signals extracted from the brain may not always be capable of driving these movements reliably. vision-guided robotic assistance is one possible way to improve bmi performance. we describe a method of shared control where the user controls a prosthetic arm using a bmi and receives assistance with positioning the hand when it approaches an object. methods: two human subjects with tetraplegia used a robotic arm to complete object transport tasks with and without shared control. the shared control system was designed to provide a balance between bmi-derived intention and computer assistance. an autonomous robotic grasping system identified and tracked objects and defined stable grasp positions for these objects. the system identified when the user intended to interact with an object based on the bmi-controlled movements of the robotic arm. using shared control,bmi controlled movements and autonomous grasping commands were blended to ensure secure grasps. results: both subjects were more successful on object transfer tasks when using shared control compared to bmi control alone. movements made using shared control were more accurate,more efficient,and less difficult. one participant attempted a task with multiple objects and successfully lifted one of two closely spaced objects in 92 % of trials,demonstrating the potential for users to accurately execute their intention while using shared control. conclusions: integration of bmi control with vision-guided robotic assistance led to improved performance on object transfer tasks. providing assistance while maintaining generalizability will make bmi systems more attractive to potential users. trial registration: nct01364480 and nct01894802. © 2016 downey et al.
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کلیدواژه
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Assistive technology; Brain-computer interface; Brain-machine interface; Neuroprosthetic; Shared mode control
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آدرس
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department of bioengineering,university of pittsburgh,pittsburgh,pa,united states,center for the neural basis of cognition,pittsburgh,pa, United States, department of bioengineering,university of pittsburgh,pittsburgh,pa,united states,department of physical medicine and rehabilitation,university of pittsburgh,pittsburgh,pa, United States, robotics institute,carnegie mellon university,pittsburgh,pa, United States, robotics institute,carnegie mellon university,pittsburgh,pa, United States, robotics institute,carnegie mellon university,pittsburgh,pa, United States, robotics institute,carnegie mellon university,pittsburgh,pa, United States, robotics institute,carnegie mellon university,pittsburgh,pa, United States, department of bioengineering,university of pittsburgh,pittsburgh,pa,united states,center for the neural basis of cognition,pittsburgh,pa,united states,department of neurobiology,university of pittsburgh,pittsburgh,pa, United States, department of bioengineering,university of pittsburgh,pittsburgh,pa,united states,center for the neural basis of cognition,pittsburgh,pa,united states,department of physical medicine and rehabilitation,university of pittsburgh,pittsburgh,pa,united states,va pittsburgh healthcare system,pittsburgh,pa,united states,university of pittsburgh,3520 5th avenue,pittsburgh,pa 15213, United States
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Authors
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