Therefore , in this thesis , the magneto - rheological damper ( mrfd ) was studied which is of simple structure , high reliability and self adaption 为此,本文研究了结构简单、可靠性高并具有自适应能力的磁流变减摆器(阻尼器) ,用于控制直升机旋翼/机体耦合动不稳定性运动。
As the wing - pivot frequency decreases , it couples with the vehicle short - period mode resulting in dynamic instability . a similar instability sometimes occurs when the pivot mode couples with the fuselage - bending mode 随其频率降低,它与飞行器短周期模态耦合时会导致飞行器动不稳定,而与机身弯曲模态耦合时同样会导致模型动不稳定性。