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为实现对颤振边界进行快速预测,采用基于系统辨识的降阶气动力方法,将ARMA/ROM训练数据用于构建闭环气动弹性系统的连续时间状态空间模型,并将所得到的状态空间模型用来确定颤振边界;对AGARD445.6机翼进行了颤振边界和颤振频率的模拟,将ARMA/ROM方法的计算结果与全阶耦合计算结果、实验结果进行了对比。研究结果表明,该方法是高效、精确的,可以用于飞行器颤振边界的模拟和快速预测。
In order to realize the fast prediction of the flutter boundary, ARMA / ROM training data are used to construct the continuous-time state space model of the closed-loop aeroelastic system by using the reduced-order aerodynamic method based on system identification. The resulting state-space model The flutter boundary and flutter frequency of the AGARD445.6 wing were simulated. The ARMA / ROM method was compared with the results of the full-order coupling and experimental results. The results show that this method is efficient and accurate and can be used to simulate and predict the flutter boundary of aircraft.