旋翼转速变化对直升机操纵品质影响分析

Influence of rotor speed variation on helicopter handling quality

针对直升机旋翼转速设计问题,对变旋翼转速直升机飞行品质进行了研究。以某变旋翼转速直升机为研究对象,建立了无铰刚性单旋翼直升机飞行动力学模型,并参照ADS-33E-PRF飞行品质规范,计算了样例直升机在悬停以及前飞(30 m/s)时不同旋翼转速状态下的操纵带宽、相位延迟、姿态快捷性和轴间耦合等操纵品质指标,分析得到不同速度下旋翼转速变化对直升机操纵品质的影响。结果表明,旋翼转速降低对滚转与俯仰姿态变化飞行品质有不利影响,对小幅度偏航姿态变化飞行品质没有影响,对中等幅度偏航姿态变化有利,对直升机轴间耦合有不利影响。

Aiming at the design problem of rotor speed of helicopter, the flight quality of variable rotor speed helicopter was studied. Taking a variable speed rotor helicopter as the research object, no hinge rigid single rotor helicopter flight dynamics model was established, and with reference to the ADS-33 E-PRF flying qualities specification, the handling quality indexes such as control bandwidth, phase delay, attitude quickness and inter interaxis coupling of the sample helicopter under different rotor speeds in hover and forward flight(30 m/s) were calculated. The influence of rotor speed variation on helicopter handling quality at different speeds was analyzed. The results show that the decrease of rotor speed has a negative effect on flight handling quality with roll and pitch attitude changes, has no effect on flight quality with small yaw attitude changes, is beneficial to medium yaw attitude changes, and has a negative effect on the coupling between axes.