Exoskeleton robotic system is a feasible solution that can help people with locomotion difficulties walk again. This system equipped around the human body can support the load and a part of the body weight, enlarging the load-bearing capacity and endurance of the biological system. The corresponding components of the exoskeleton system, such as the power capacitor and transmission, kinematic energy transmission, degrees of freedom of motions and adjustments for different wearers, are of great importance as well as the frame and ergonomic designs. Exoskeleton robots are developed in many countries, including the US, Japan, South Korea and Israel, etc. They are oriented into different usages – both military and medical devices. University of Tsukuba proposed a commercial exoskeleton robot, Hybrid Assistive Limb, for patient walking and stair-climbing assistances. US Defense Advanced Research Projects Agency (DARPA) supported a multi-million project in “Exoskeletons for Human Performance Augmentation” and help rapid progresses in the researches and developments on exoskeleton robot field.

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