AIST’s use of the modified Honda P3 humanoid (HRP-1S) was short-lived. They soon developed their own proprietary bipedal walker called the HRP-2L which was basically just a pair of legs, and the HRP-2A which was an upper torso with arms. These were then combined into the HRP-2P.
In 2002, the HRP-2P (nicknamed P-chan, for Prototype) was the next full-sized humanoid shown, and was the first of its size to be capable of standing up under its own power, whether it was lying on its front or back. This ability is crucial in the event the robot falls or is knocked over, and a noteworthy accomplishment considering that even Honda’s Asimo cannot yet do this (although they’re working on it).
AIST also implemented reactive falling motion control to dampen the impact of a fall. When falling, the robot bends its knees to lower its center of gravity and folds its arms closer to the body. The HRP-2P weighs less than half that of its clunky predecessor, coming in at a reasonable 127lbs, and is only 4″ shorter at exactly 5ft tall.
- HRP-2L press release (JP)
- HRP-2P press release (EN) (JP)
- HRP-2P movies @ AIST
- AIST (official website EN/JP)
- AIST Humanoid Robotics Group (official site EN/JP)
AIST | Impress Robot Watch