直升机静电场研究

Research on Electrostatic Field of Helicopter

直升机旋翼的旋转特性使其电场分布及变化规律与固定翼飞行器有明显区别。运用电磁场分析软件分析了旋翼的电荷分布特性,研究表明,由于尖端分布效应,直升机旋翼的电荷分布主要集中在旋翼顶端,旋翼中部的电荷分布较均匀。根据数值仿真结果,运用点电荷系建立了直升机运动时的荷电分布模型,该模型仿真结果表明,直升机的电场分布及变化规律明显地受到旋翼旋转及直升机自身运动的影响,电场信号中含有旋翼旋转及直升机运动的相关信息。内外场实验的结果与模型仿真结果基本相符,证明直升机旋翼荷电模型建立方法是可行的,可利用该模型对直升机静电探测和目标识别进行研究。

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.