Editing Robot locomotion (section)

===Hopping===
Several robots, built in the 1980s by [[Marc Raibert]] at the [[Massachusetts Institute of Technology|MIT]] Leg Laboratory, successfully demonstrated very dynamic walking. Initially, a robot with only one leg, and a very small foot, could stay upright simply by [[wikt:hop|hopping]]. The movement is the same as that of a person on a [[pogo stick]]. As the robot falls to one side, it would jump slightly in that direction, in order to catch itself.<ref>{{cite web|url=http://www.ai.mit.edu/projects/leglab/robots/3D_hopper/3D_hopper.html|publisher=MIT Leg Laboratory|title=3D One-Leg Hopper (1983–1984)|access-date=2007-10-22}}</ref> Soon, the algorithm was generalised to two and four legs. A bipedal robot was demonstrated running and even performing [[somersault]]s.<ref>{{cite web|url=http://www.ai.mit.edu/projects/leglab/robots/3D_biped/3D_biped.html|publisher=MIT Leg Laboratory|title=3D Biped (1989–1995)}}</ref> A [[quadrupedalism|quadruped]] was also demonstrated which could [[trot (horse gait)|trot]], run, [[Horse gait#Pace|pace]], and bound.<ref>{{cite web|url=http://www.ai.mit.edu/projects/leglab/robots/quadruped/quadruped.html|publisher=MIT Leg Laboratory|title=Quadruped (1984–1987)}}</ref>

Examples:
* The MIT cheetah cub is an electrically powered quadruped robot with passive compliant legs capable of self-stabilizing in large range of speeds.<ref>{{Cite journal|last=A. Spröwitz, A. Tuleu, M. Vespignani, M. Ajallooeian, E. Badri, A. J. Ijspeert|date=2013|title=Towards dynamic trot gait locomotion: Design control and experiments with cheetah-cub a compliant quadruped robot|url=http://infoscience.epfl.ch/record/184991|journal=The International Journal of Robotics Research|volume=32|issue=8|pages=932–950|doi=10.1177/0278364913489205|s2cid=90770}}</ref> 
* The Tekken II is a small quadruped designed to walk on irregular terrains adaptively.<ref>{{Cite journal|last=H. Kimura, Y. Fukuoka, A. H. Cohen|date=2004|title=Biologically inspired adaptive dynamic walking of a quadruped robot|journal=Proceedings of the International Conference on the Simulation of Adaptive Behavior|pages=201–210}}</ref>