Design And Research For The Dishing Unmanned Helicopter

A technology for designing a dishing axial-symmetric unmanned helicopter that based on a coaxial rotor system shrouded by a toroidal shell is studied in this thesis.Based on the researches of shell and co-axial rotors, the aerodynamic characteristics of the helicopter in hovering are studied by means of the combination of momentum theory and blade element theory in this paper. An aerodynamic mathematical modeling has been established.According to the design scheme of dishing axial-symmetric unmanned helicopter, the configuration and preliminary parameters are determined, and the general performance characteristics of the helicopter has been computed. The design of configuration and other primary structures of the helicopter have been finished.In order to analysis the stability and control of the helicopter, a flight mechanical modeling has been founded based on a single-rotor helicopter. The dynamic and static properties have been analyzed, and the dynamic responses to controls are discussed. Finally, a flight simulation was made base on a research of real time simulation of helicopter fuzzy flight control.