The snake robot has the characteristics of the mechanism of "multi joint" is suitable for use in such a manner. Due to the number of degrees of freedom (degree of freedom) than the general industrial robot is sometimes called Redundant robots.Each segment is connected by joints. The joints each specifically designed for fitting one has two degrees of freedom is able to plane movement up and down and left - right mobile robot can avoid obstacles have as well.Redundant robots long ago. Examples of research are MELARM created by engineering laboratory air trick of Commerce and industry international. (MITI) Japan MELARM is a robot with two arms.Created for use in the experiment on the control master - slave or robot research Self Approach system created by the company Toshiba Japan is a robot with 17 degrees of freedom. A similar snake most.UJIBOT robot developed from Kyoto University A manipulator, which there are seven degrees of freedom.