Abstract:
On-line gait control in human-powered exoskeleton systems is still rich research field and represents a step
towards fully autonomous, safe and intelligent indoor and outdoor navigation. It is still a big challenge to develop
a control strategy which makes the exoskeleton supply an efficient tracking for pilot intended trajectories on-line.
Considering the number of degrees of freedom the lower limb exoskeletons are simpler to design, compared to upper
limb. The comparison between lower limb and upper limb is useless when consider the control issues, because of
the differences in missions and applications. Based on the literature, we aim to give an overview about control
strategies of some famous lower limb human power exoskeleton systems. In the state of the art, different control
strategies and approaches for different types of lower limb exoskeletons will be compared consider the efficiency and
economic issues. Exact estimation of needed joints torques to execute human intended motions on-line with efficient
performance, low cost and reliable way is the main goal of studied system’s control strategies. We have study
different control strategies used for wide known human power augmentation exoskeletons and compare between
them in graphs and tables.
