抄録
In this study, we aim to establish the optimal mechanical design method for fixed-pitch coaxial-rotor helicopter. The fixed-pitch coaxial-rotor helicopter has several advantages. However, fixed-pitch coaxial-rotor helicopter has a disadvantage in forward flight named pitch-up phenomenon. The pitch-up phenomenon causes a little cruise speed of the helicopter. To overcome such a problem, we propose optimal mechanical design of the fixed-pitch coaxial-rotor helicopter by using precise mathematical model of the helicopter and numerical optimization method. The mechanical parameters are examined to maximize the cruise speed of the helicopter. Mechanical parameter optimization based on derived mathematical model and Particle Swarm Optimization (PSO) method is proposed. In the simulation, the position of the universal joint is optimized to maximize the cruise speed of the helicopter.
