Search scope:
排序: Display mode:
Design of active orthoses for a robotic gait rehabilitation system
A. C. VILLA-PARRA,L. BROCHE,D. DELISLE-RODRÍGUEZ,R. SAGARÓ,T. BASTOS,A. FRIZERA-NETO
Frontiers of Mechanical Engineering 2015, Volume 10, Issue 3, Pages 242-254 doi: 10.1007/s11465-015-0350-1
An active orthosis (AO) is a robotic device that assists both human gait and rehabilitation therapy
Keywords: active orthosis gait rehabilitation electroencephalography surface electromyography
Unpowered Knee Exoskeleton Reduces Quadriceps Activity during Cycling Article
Ronnapee Chaichaowarat,Jun Kinugawa,Kazuhiro Kosuge
Engineering 2018, Volume 4, Issue 4, Pages 471-478 doi: 10.1016/j.eng.2018.07.011
Cycling is an eco-friendly method of transport and recreation. With the intent of reducing the energy cost of cycling without providing an additional energy source, we have proposed the use of a torsion spring for knee-extension support. We developed an exoskeleton prototype using a crossing four-bar mechanism as a knee joint with an embedded torsion spring. This study evaluates the passive knee exoskeleton using constant-power cycling tests performed by eight healthy male participants. We recorded the surface electromyography over the rectus femoris muscles of both legs, while the participants cycled at 200 and 225W on a trainer with the developed wheel-accelerating system. We then analyzed these data in time–frequency via a continuous wavelet transform. At the same cycling speed and leg cadence, the median power spectral frequency of the electromyography increases with cycling load. At the same cycling load, the median power spectral frequency decreases when cycling with the exoskeleton. Quadriceps activity can be relieved despite the exoskeleton consuming no electrical energy and not delivering net-positive mechanical work. This fundamental can be applied to the further development of wearable devices for cycling assistance.
Keywords: Augmentation Cycling Energy cost Electromyography Exoskeleton Knee Orthosis Muscle activity
Title Author Date Type Operation
Design of active orthoses for a robotic gait rehabilitation system
A. C. VILLA-PARRA,L. BROCHE,D. DELISLE-RODRÍGUEZ,R. SAGARÓ,T. BASTOS,A. FRIZERA-NETO
Journal Article