Abstract: The electric field distribution of helicopter rotor wing differs from that of fixed-wing aircraft because of its characteristic of rotation. The charge distribution of helicopter rotor was analyzed using an electromagnetic field analysis software. Simulation result shows that the conclusion that the charges are mainly distributed on the top end of rotor wing as a result of cusp distribution effect, while the charges are distributed evenly in the middle part. an electric charge distribution model of helicopter was proposed based on a dot-charge system according to the numerical simulation results. The simulation result show that the electric field distribution of helicopter is affected obviously by the rotation of rotor wing and the movement of helicopter. The properties of signals generated by the rotation of rotor wing wer reflected by electric field. The lab and field experimental results agree with the simulation results, and the electrostatic charge model of helicopter is viable. The model can be used to research the detection and recognition of helicopter target.

Key words: information processing, helicopter, electrostatic detection, charge distribution, electric charge model