Abstract:  A new modular mobile robot was designed, which consists of four basic modules. For the selforganized collaboration behavior of multi-modular mobile robots in the complex environment, this paper presented three motion strategies. The direction selected rules of the goal were analyzed in the multimodular mobile robots. The multi-obstacle avoidance strategy that based on the “perception-action” was described. So robots can avoid the obstacle continuously and reach the assigned goal. The coordination strategy in multi-modular robots was shown, by which they can cooperate with others to carry the heavy or climb over a step that a single robot cannot complete. At last, the 3D simulation proves the validity of the strategy in the multi-obstacle environment.

Key words: modular, multirobot, self-organized, collaboration