In this paper, we show cooperative object transportation by two four-legged
robots. To realize cooperative transportation with autonomy, we adopt impl
icit communication based cooperation. Each robot uses only its own sensors
to estimate the state of a task. With this method, people can attend to the
cooperation system without any changes. We will show an algorithm and two
experiments; one is by two legged robots and the other is by one robot and
a human. (C) 1999 Elsevier Science B.V. All right reserved.