P3 possesses 16 joints which can be individually selected and which, due to their degree of flexibility, also enable complex movements.
The most important difference in comparison with the human apparatus of locomotion is that the spinal column is missing. Thus P3's back is rigid. P3 has therefore been equipped with relatively long arms in order to reach the floor on bent knees.
The high mobility of P3's joints as well as the cleverly constructed balance control mechanisms enable it to stand on one leg.
The real attraction about P3, however, is its ability to walk on two legs. P3 manages this extremely complex requirement with unparalleled sovereignty.
The way it turns on the spot may still appear somewhat awkward, but this is more a problem stemming from the control software than due to P3's mechanical abilities.
Flexible selectability and high mobility of joints also enable P3 to walk sideways...
...or to walk leaning forward.
However, P3's outstanding balancing act is its ability to climb up a flight of stairs on its own.
The robot does this with an admirable steadiness, despite the extremely high demands on foot control.
It is even more difficult to come back down a flight of stairs due to the fact that the feet have to absorb and balance out very high forces, but this is also no longer a problem for P3.
Despite a built-in camera, P3 is currently not capable of recognising the height of a step independently and to automatically adapt its gait. But nevertheless...
... even today, P3`s abilities clearly illustrate the potential of future bipedal service robots.