patient’s recovery efficacy – LokoMat [4], LOPES [5];
they are also aiming to help paraplegic or quadriplegic people to
regain locomotion ability in daily life – ATLAS [6], ReWalkTM [7],
Ekso (Ekso Bionics, US, formerly eLEGs [8]); they are adopted as
augmentation systems empowering healthy people to perform
heavy loads carrying – BLEEX [9], Sarcos Exoskeleton [10],
MIT Exoskeleton [11]; they are also used to provide additional
power for walking or stair-climbing of people suffering from
muscular weakness (e.g. elderly persons) – HAL [12],HONDAStride
Management Assist (Honda, Tokyo, Japan). The latter emerging
application field is a consequence of the population aging in
industrialized countries: the ratio of people older than 65 years
reached 17.5% over the whole population in European Union in
2011, and is estimated to reach 29.5% in 2060 [13]. Similarly, in
USA the over-65 population percentage was 13.3% in 2011, with
an expected increase to 21% in 2040 [14]. Due to a low birth rate