Switching curve controller for FES-assisted standing up and sitting down

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Switching curve controller for FES-assisted standing up and sitting down.

A low-level, closed-loop controller for FES-assisted standing up and sitting down is described. If, for able-bodied individuals, when standing up and sitting down, the knee angular velocity is plotted against knee angle, consistent phase-plane trajectories are produced. The bang-bang controller uses a model of this trajectory as a switching curve. The design rationale for the controller was the...

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A Model for the Design of Fes Standing-up Strategies

We present a physiologically based model that describes major properties of muscles and segmental dynamics during FES assisted standing-up. It accounts for relevant time-dependent and nonlinear properties (temporal and spatial summation, muscle fatigue, force-length and force-velocity relations, viscoelastic effects, nonlinear moment arms, choice of muscles stimulated, seat and upperbody intera...

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Computer simulation of FES standing up in paraplegia: a self-adaptive fuzzy controller with reinforcement learning.

Using computer simulation, the theoretical feasibility of functional electrical stimulation (FES) assisted standing up is demonstrated using a closed-loop self-adaptive fuzzy logic controller based on reinforcement machine learning (FLC-RL). The control goal was to minimize upper limb forces and the terminal velocity of the knee joint. The reinforcement learning (RL) technique was extended to m...

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Differential joint coordination in the tasks of standing up and sitting down.

We studied similarities and differences in the use of goal-equivalent patterns of joint coordination to stand up and sit down from different support surfaces, performed without vision. Sagittal plane motion of major body segments was measured and joint angles for the left upper and lower extremities and the trunk were calculated. We used a modeling strategy relating motion in the redundant spac...

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ژورنال

عنوان ژورنال: IEEE Transactions on Rehabilitation Engineering

سال: 1998

ISSN: 1063-6528,1558-0024

DOI: 10.1109/86.681182