Ekso Bionics Holdings Inc (EKSO)

[Rhetorical]

Ablu, go watch DARPA Robotics Challenge 2015. The best robotics engineers in the entire world are competing in these challenges. Despite this, they still fall over all the time and are extremely slow and bulky. (

) The amount of technology required to have everything fit in a small package while not being too heavy is incredibly hard. The temporary solution to not being able to build an army of super robots is the exoskeleton. This is why SOCOM is putting so much effort into the T.A.L.O.S. project. It's going to be the first time human's have been fully surrounded by armor in battle since knights in metal suits of armor. Modern suits will be temperature controlled, auto tourniquets, heart rate sensing, with a very heavy helmet with GUI displays connected wireless to allies. The amount of technology required to carry all of this effectively requires VERY efficient motors, batteries, and physics to maintain effective angles of motion. Let me cite the physics involved from an ekso patent:

(M TRUNK L 2+I){umlaut over (ß)}1-(LM TRUNK +RM L)g Sin(ß1+a)+T F
wherein:
M TRUNK is a mass of the exoskeleton trunk and any attached load;
ML is a mass of the respective first and second leg support in the stance phase;
I is moment of inertia of the respective first and second leg support in the stance phase;
L is a length of the respective first and second leg support in the stance phase;
R is a distance between a center of mass of the respective first and second leg support in the stance phase and a rotational point;
g is force due to gravity;
ß1 is an angle between a support surface and the normal line of force on the exoskeleton trunk from the person's upper body;
a is a ground slope defined by an angle between a support surface and a horizontal plane; and
TF is a frictional torque opposing the motion of the leg support relative to the exoskeleton trunk.

http://www.google.com/patents/US8945028