| 对模态参数识别的整体正交多项式分段拟合的处理方法 |
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| 引用本文： | 王凤利,马孝江. 对模态参数识别的整体正交多项式分段拟合的处理方法[J]. 机床与液压, 2003, 0(1): 186-188,191 |
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| 作者姓名： | 王凤利 马孝江 |
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| 作者单位： | 大连理工大学机械工程学院,大连,116024 |
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| 摘 要： | 在整体正交多项式识别法的基础上，介绍了在分段拟合中消除段外模态影响的方法。通过对拟合频段外的低阶和高阶模态的分析和处理，提出了用邻近拟合段前后两个频段中的模态来修正频响数据，并建立了曲线拟合模型，将本文的方法识别结果与不考虑段外模态影响的方法以及局部识别法识别结果进行了比较，结果表明本文的方法具有较好的计算精度。
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| 关 键 词： | 正交多项式 模态参数识别 整体识别法 局部识别法 分段拟合 |
| 文章编号： | 1001-3881(2003)1-186-3 |
Treatment of Global Modal Parameter Identification Using Rational Fraction Orthogonal Polynomial during Piecewise Fitting |
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| Wang Fengli,Ma Xiaojiang. Treatment of Global Modal Parameter Identification Using Rational Fraction Orthogonal Polynomial during Piecewise Fitting[J]. Machine Tool & Hydraulics, 2003, 0(1): 186-188,191 |
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| Authors: | Wang Fengli Ma Xiaojiang |
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| Abstract: | Based on the global fraction orthogonal polynomials algorithm, a method for eliminating affections of modes outside of fitting bands is reviewed. Both lower and higher modes outside of the fitting band are analyzed and processed. The frequency response data are revised by means of modes in two frequency bands close to the fitting band, and a curve model is derived. The results from this method are compared with those of the traditional estimation without regard to the affections of modes outside of the fitting band and local estimation, and it is shown that the former is more accurate. |
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| Keywords: | Modal parameter estimation Global estimation Local estimation Piecewise fitting |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
