功率谱密度（PSD）函数在阵风载荷飞行试验数据分析中占有重要的地位。
The power spectrum density (PSD) function is important in gust load flight experiment data analysis.
在阵风条件下，为了抑制飞机的附加载荷并改善乘坐品质，需要得到飞机的迎角状态。
In the condition of gust, in order to restrain additional load and improve the comfort of passenger, the state of Angle of attack is acquired.
传统的阵风响应主要在频域内进行分析，气动载荷基于线性方法计算，不能考虑黏性和跨声速流动影响。
Traditional gust responses are mainly analyzed based on linear aerodynamic load calculations in frequency-domain, which is unsuitable for and the viscous and transonic flows.
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