共轴式直升机全差动航向操纵的动态响应分析

运用经典的垂直飞行涡流理论及共轴双旋翼全差动操纵的结构特征，推导了共轴式双旋翼直升机垂直飞行的航向动力学方程。根据有关共轴双旋翼在悬停及垂直飞行状态时气动特性的理论和实验数据，得出了共轴双旋翼直升机垂直飞行航向动力学方程的解析式。某型共轴双旋翼直升机计算实例，所得结果与该型直升机飞行特性一致。

Analysis of dynamic response of direction control for a full-differential coaxial helicopter

The directional dynamics equations of a full differential coaxial helicopter in vertical flight were set up and solved based on classical vortex theory and characteristics of aerodynamic disturbance between upper and lower rotors of the coaxial helicopter.The analytical formulas of the directional dynamics equations of the helicopter in vertical flight are deduced from the theoretical and practical aerodynamics data for the dual rotors coaxial helicopter during the hovering and vertical flight.Calculation example given indicates that the equations of dynamic response proposed for vertical movement and direction rotation reflect flight characteristics of this helicopter.