某型机空中共振数据分析和参数识别

Air Resonance Stability Analysis and Parameter Identification of a Helicopter in Forward Flight

对于新研直升机,必须考虑旋翼与机身耦合不稳定性问题———地面共振和空中共振。以某型直升机作为研究对象,根据其飞行状态下实测载荷和振动数据对该型直升机空中共振情况进行了分析,并采用移动矩形窗方法识别了旋翼摆振模态的阻尼和频率,初步摸索了一套直升机空中共振实测数据分析和参数识别方法。

Air resonance stability analysis in forward flight must be considered in the helicopter developing.This paper included the description of air resonance phenomenon of a new design helicopter in forward flight,air resonance stability analysis and parameter identification with measured data.