Abstract:In order to adapt to the special needs of complex operations such as disaster relief, resource exploration, field investigation, complex scenes and complex terrain, this paper studies the overall configuration and structure design of a small amphibian robot. Firstly, according to the robot"s need to achieve low-angle detection of the land and high-angle detection in the air, it is determined that the robot must have both ground motion capability and airborne motion capability. Its function is the organic combination of ground robot and flight robot. The integrated design and the combined design scheme were used to analyze the configuration of the mechanism. The two - degree - of - freedom structure legs and three - degree - of - freedom structure legs are discussed and analyzed respectively. Finally, a comprehensive comparison is made between the integrated configuration scheme and the combined configuration scheme. Through the comprehensive comparison of advantages and disadvantages, it is concluded that the combined configuration scheme has obvious advantages in terms of functionality, practicability and stability, providing a reliable and credible basis for the development of the physical prototype of the robot.