Finite State Control of FES-Assisted Walking with Spring Brake Orthosis

This paper presents finite state control (FSC) of paraplegic walking with wheel walker using functional electrical stimulation (FES) with spring brake orthosis (SBO). The work is a first effort towards restoring natural like swing phase in paraplegic gait through a new hybrid orthosis, referred to as spring brake orthosis (SBO). This mechanism simplifies the control task and results in smooth motion and more-natural like trajectory produced by the flexion reflex for gait in spinal cord injured subjects. The study is carried out with a model of humanoid with wheel walker using the Visual Nastran (Vn4D) dynamic simulation software. Stimulated muscle model of quadriceps is developed for knee extension. Fuzzy logic control (FLC) is developed in Matlab/Simulink to regulate the muscle stimulation pulse-width required to drive FES-assisted walking gait and the computed motion is visualised in graphic animation from Vn4D and finite state control is used to control the transaction between all walking states. Finite state control (FSC) is used to control the switching of brakes, FES and spring during walking cycle.

[1]  Henry M. Franken,et al.  Identification of passive knee joint and shank dynamics in paraplegics using quadriceps stimulation , 1993 .

[2]  L. Schwirtlich,et al.  Hybrid assistive system-the motor neuroprosthesis , 1989, IEEE Transactions on Biomedical Engineering.

[3]  Henrik Gollee,et al.  The international functional electrical stimulation society (IFESS): Highlights from the IFESS conference at RehabWeek 2022. , 2023, Artificial organs.

[4]  R. D'ambrosia,et al.  Reciprocating gait orthosis powered with electrical muscle stimulation (RGO II). Part I: Performance evaluation of 70 paraplegic patients. , 1997, Orthopedics.

[5]  Nene Av,et al.  Energy cost of paraplegic locomotion using the ParaWalker--electrical stimulation "hybrid" orthosis. , 1990 .

[6]  F Mauguière,et al.  Selective gating of lower limb cortical somatosensory evoked potentials (SEPs) during passive and active foot movements. , 1997, Electroencephalography and clinical neurophysiology.

[7]  Rozita Jailani,et al.  Passive stiffness and viscosity of dynamic leg model: Comparison between GA and PSO , 2009 .

[8]  C A Phillips,et al.  Functional electrical stimulation and reciprocating gait orthosis for ambulation exercise in a tetraplegic patient: a case study , 1991, Paraplegia.

[9]  Brian J. Andrews,et al.  Fuzzy logic control of FES rowing exercise in paraplegia , 2004, IEEE Transactions on Biomedical Engineering.

[10]  A. Nene,et al.  Hybrid paraplegic locomotion with the ParaWalker using intramuscular stimulation: a single subject study , 1989, Paraplegia.

[11]  Robert B. McGhee,et al.  A Finite State Approach to the Synthesis of Bioengineering Control Systems , 1966 .

[12]  M. O. Tokhi,et al.  Estimation of Passive Stiffness and Viscosity in Paraplegic: A Dynamic Leg Model in Visual Nastran , 2009 .

[13]  R. Douglas,et al.  Ambulation using the reciprocating gait orthosis and functional electrical stimulation , 1992, Paraplegia.

[14]  Robert B. McGhee,et al.  Some finite state aspects of legged locomotion , 1968 .

[15]  M. Osman Tokhi,et al.  Development of Dynamic Muscle Model with Functional Electrical Stimulation , 2010, 2010 Complexity in Engineering.

[16]  Rozita Jailani,et al.  A novel approach in development of dynamic muscle model for paraplegic with functional electrical stimulation , 2009 .

[17]  B J Andrews,et al.  Optimal control of FES-assisted standing up in paraplegia using genetic algorithms. , 1999, Medical engineering & physics.

[18]  Rahman Davoodi,et al.  Automatic Finite State Control of FES‐Assisted Indoor Rowing Exercise after Spinal Cord Injury , 2002, Neuromodulation : journal of the International Neuromodulation Society.

[19]  G. Forrest,et al.  Technology for mobility and quality of life in spinal cord injury [Analyzing a Series of Options Available] , 2008, IEEE Engineering in Medicine and Biology Magazine.

[20]  A V Nene,et al.  Energy cost of paraplegic locomotion using the ParaWalker--electrical stimulation "hybrid" orthosis. , 1990, Archives of physical medicine and rehabilitation.

[21]  David A. Winter,et al.  Biomechanics and Motor Control of Human Movement , 1990 .

[22]  J. M. Hausdorff,et al.  Open-loop position control of the knee joint using electrical stimulation of the quadriceps and hamstrings , 2006, Medical and Biological Engineering and Computing.

[23]  P. Veltink,et al.  Low-level finite state control of knee joint in paraplegic standing. , 1992, Journal of biomedical engineering.

[24]  E. Marsolais,et al.  Walking with a hybrid orthosis system , 1999, Spinal Cord.

[25]  Fabrizio Luccio,et al.  An Introduction to the Theory of Automata , 1971, International Centre for Mechanical Sciences.