关键词: 仿生设计, 产品设计, CAD 技术, 跨介质航行器, 鲣鸟

Abstract: Unmanned amphibious aircrafts have become a hot topic in recent researches. In
order to make aircrafts achieve 3 navigation states which include travelling underwater, travel state
transition from water to air, and flying in the sky, we need to solve several technical matters such as
variable density, structural transformation, power conversion and so on. Meanwhile, the studies on
hydromechanics, dynamics of interface, aerodynamics are also crucial. Australasian gannets, like
many other seabird species, locate pelagic prey from the air and perform rapid plunge dives for their
capture. This kind of birds can fly through both the water and the air, so the research on its actions is
of great immense significance to the study of the unmanned amphibious aircrafts. The processes of
bionic design methods for the unmanned amphibious aircraft are introdeced, and the functions of
CAD techniques using in the bionic design process are explained.

Key words: bionic design, product design, CAD, amphibious aircrafts, gannets