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D2.1 Requirements and Specification - CORBYS

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<strong>D2.1</strong> <strong>Requirements</strong> <strong>and</strong> <strong>Specification</strong><br />

knee joints optimised for propulsion of the legs during swing in treadmill walking (Mankala et al., 2007).<br />

16.2.2.3 Assistive exoskeletons<br />

Also in the field of assistive exoskeletons, a multitude of devices <strong>and</strong> prototypes have been developed, some<br />

of them also envisaged for use in rehabilitation or performance augmentation. The ReWalk (Argo Medical<br />

Technologies, Israel) is a bilateral robotic suit for the mobility impaired that is near to being released to the<br />

market. Some exoskeletons are specifically aimed at assisting the elderly, such as the walker based<br />

exoskeleton EXPOS reported in Kong <strong>and</strong> Jeon (2006) <strong>and</strong> its successor SUBAR (Kong et al., 2009), others<br />

focus entirely on body weight support, such as the Moonwalker (Krut et al. (2010)) <strong>and</strong> the Bodyweight<br />

Support Assist by Honda. A combination of a quasi-passive exoskeleton with functional electrical stimulation<br />

(FES) is proposed in Farris et al. (2009). Many single joint exoskeletons have been developed. The DCO<br />

(Hitt et al., 2007) <strong>and</strong> the AAFO (Blaya <strong>and</strong> Herr, 2004) are examples of active ankle foot orthoses making<br />

use of series-elastic actuators to assist in push-off or to correct dropped foot gait.<br />

Figure 49: Assistive exoskeletons: (from left to right) ReWalk., Body Weight Support Assist, SUBAR<br />

Figure 50: Power augmenting exoskeletons: (from left to right) BLEEX, Sarcos Exoskeleton,<br />

MIT's Quasi-passive Leg Exoskeleton, HAL<br />

16.2.2.4 Human performance augmenting exoskeletons<br />

The majority of human performance augmenting exoskeletons for the lower limbs has been designed for load<br />

169

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