A novel motion sensor-driven control system for FES-assisted walking after spinal cord injury: A pilot study

Braz, Gustavo P.; Russold, Michael Friedrich; Fornusek, Ché; Hamzaid, Nur Azah; Smith, Richard M.; Davis, Glen M.

doi:10.1016/j.medengphy.2016.06.007

Cited by 5 publications

(2 citation statements)

References 42 publications

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“…3 The use of inertial sensors including gyroscopes and accelerometers within a closed-loop control system has been reported previously in the literature. 8,14,16,19,31 The sensory feedback from these sensors is used to detect gait phases and measure kinematics, which can then be employed to adapt the output of the system. Braz et al 31 proposed a closed-loop FES gait control system utilising a finite state controller with the help of processed kinematic feedback from four motion sensors placed on the shank and thigh segments.…”

Section: Discussionmentioning

confidence: 99%

“…8,14,16,19,31 The sensory feedback from these sensors is used to detect gait phases and measure kinematics, which can then be employed to adapt the output of the system. Braz et al 31 proposed a closed-loop FES gait control system utilising a finite state controller with the help of processed kinematic feedback from four motion sensors placed on the shank and thigh segments. The stimulation of the quadriceps and gluteus and peroneal nerve is controlled during the gait sub-phases determined by the sagittal knee angle signal.…”

Section: Discussionmentioning

confidence: 99%

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A functional electrical stimulation system for human walking inspired by reflexive control principles

Meng

Porr

Macleod

et al. 2017

Proc Inst Mech Eng H

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This study presents an innovative multichannel functional electrical stimulation gait-assist system which employs a well-established purely reflexive control algorithm, previously tested in a series of bipedal walking robots. In these robots, ground contact information was used to activate motors in the legs, generating a gait cycle similar to that of humans. Rather than developing a sophisticated closed-loop functional electrical stimulation control strategy for stepping, we have instead utilised our simple reflexive model where muscle activation is induced through transfer functions which translate sensory signals, predominantly ground contact information, into motor actions. The functionality of the functional electrical stimulation system was tested by analysis of the gait function of seven healthy volunteers during functional electrical stimulation–assisted treadmill walking compared to unassisted walking. The results demonstrated that the system was successful in synchronising muscle activation throughout the gait cycle and was able to promote functional hip and ankle movements. Overall, the study demonstrates the potential of human-inspired robotic systems in the design of assistive devices for bipedal walking.

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