用于高增益飞控系统设计的直升机纵向模型

Helicopter longitudinal dynamics modeling for highly-gain flight control system design

在小扰动假设的条件下 ,研究了含有直升机旋翼挥舞动力学的纵向运动模型的建立方法 ,指出了准静态假设纵向运动方程的实质及限制。通过对实例的计算研究发现 ,机体对挥舞的影响可以忽略 ,模型可简化为机体和挥舞模型的串联。最后 ,在同一控制律作用下对运动稳定性进行了计算 ,结果表明含有挥舞动力学的纵向运动模型才能适用于高增益飞行控制系统的设计。

Under assumption of small disturbance,a method which build helicopter longitudinal dynamics model with rotor flapping is researched,the essence and application limitation of rigid-body model in accordance with quasi-static assumption is presented.The effects of rigid-body dynamics on rotor flapping can be ignored through calculation of example helicopter,as a results,the model is simplified to series between rotor flapping model and rigid-body dynamics model. Above two models stability is calculated independently under same control law action,the result indicate that longitudinal dynamics model with rotor flapping can be used for highly-gain flight control system design.