分布动态载荷识别的抗噪处理

Anti-Noise Study on Distributed Dynamic Load Identification

针对正交多项式频域法在用多种响应对矩形薄板进行载荷识别中抗噪性较差的问题,综合运用平均法、矩阵预处理和奇异值截断法等方法对之进行改善,并引入空间映射的思想,将该方法的应用范围拓展为复杂的模型。利用仿真算例,证实了该方法具有较好的抗噪性。

In order to improve the anti-noise ability of distributed dynamic load identification in frequency domain using multi-response on a rectangular plate,an integrated method using average method,matrix pretreatment and truncated singular value decomposition (TSVD) were employed and modified. Guided by the idea of space mapping,this method was applied to complicated models and its application area was expanded. Two simulation examples demonstrated anti-noise ability of the method.