Dry wind-tunnel (DWT) flutter test systems model the unsteady distributed aerodynamic force using various electromagnetic exciters. They can be used to test the aeroelastic and aeroservoelastic stability of smart aircraft or high-speed flight vehicles. A new parameterised modelling method at the full system level based on the generalised force equivalence for DWT flutter systems is proposed herein. The full system model includes the structural dynamic model, electromechanical coupling model and fast aerodynamic computation model. An optimisation search method is applied to determine the best locations for measurement and excitation by introducing Fisher’s information matrix. The feasibility and accuracy of the proposed system-level numerical DWT modelling method have been validated for a plate aeroelastic model with four exciters/transducers. The effects of key parameters including the number of exciters, the control time delay, the noise interference and the electrical parameters of the electromagnetic exciter model have also been investigated. The numerical and experimental results indicate that the proposed modelling method achieves good accuracy (with deviations of less than 1.5% from simulations and 4.5% from experimental test results for the flutter speed) and robust performance even in uncertain environments with a 10% noise level.

中文翻译：

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一种基于广义力等效的干式风洞颤振试验系统建模方法

干式风洞 (DWT) 颤振测试系统使用各种电磁激励器模拟非定常分布的气动力。它们可用于测试智能飞机或高速飞行器的气动弹性和气动伺服弹性稳定性。本文提出了一种基于广义力等效的DWT颤振系统全系统级参数化建模新方法。全系统模型包括结构动力学模型、机电耦合模型和快速气动计算模型。通过引入Fisher信息矩阵，采用优化搜索方法确定测量和激励的最佳位置。所提出的系统级数值 DWT 建模方法的可行性和准确性已针对具有四个激振器/换能器的板气动弹性模型进行了验证。研究了激励器数量、控制延时、噪声干扰和电磁激励器模型电参数等关键参数的影响。数值和实验结果表明，即使在噪声水平为 10% 的不确定环境中，所提出的建模方法也具有良好的精度（与模拟的偏差小于 1.5%，与实验测试结果的颤振速度偏差小于 4.5%）和稳健的性能。