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本文从 ARMAX 模型出发,利用递推辅助变量(RIV)法,对结构系统模态参数估计进行了研究。提出用直接抽取滤波与 RIV 相结合的 DDF-RIV 法,提高了估计的分辨率。用悬臂梁机翼四分之一模型的振动实验数据作了验证,其结果与预期的较为吻合。
Based on the ARMAX model, this paper studies the modal parameter estimation of structural system by using recursive auxiliary variable (RIV) method. The DDF-RIV method combining direct extraction filtering with RIV is proposed to improve the estimated resolution. The experimental data of the cantilever wing quarter model were validated and the results were in good agreement with the expected ones.