| 识别传递函数参数的最小绝对值法 |
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| 引用本文： | 查利权,汪凤泉.识别传递函数参数的最小绝对值法[J].振动与冲击,1996,15(3):43-47. |
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| 作者姓名： | 查利权 汪凤泉 |
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| 作者单位： | 东南大学动力系 |
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| 摘 要： | 利用线性振动系统的传递函数可正确识别出振动系统的模态参数。用最小二乘法通过实测频响特性的数据求传递函数时，当频响特性的量测误差呈非高斯分布，则识别出的参数是有偏的。为此，本文用最小绝对值误差方法导出识别传递函数参数的新方法，并通过算例来验证它的有效性。
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| 关 键 词： | 参数识别，参数估计，传递函数，振动模态参数 |
TRANSFER FUNCTION PARAMETER ESTIMATION USING LEAST-ABSOLUTE VALUE TECHNIQUE |
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| Zha Liquan, Wang Fengquan, Han Jitian ,Cao Zuqing.TRANSFER FUNCTION PARAMETER ESTIMATION USING LEAST-ABSOLUTE VALUE TECHNIQUE[J].Journal of Vibration and Shock,1996,15(3):43-47. |
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| Authors: | Zha Liquan Wang Fengquan Han Jitian Cao Zuqing |
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| Abstract: | This paper presents a new algorithm to estimate parameters of transfer functions.The algorithm developed is based on the least absolute value approximation of l1-norm. By using this technique, there is no need of iteration operation to obtain the estimation. In an example, the results obtained using the proposed algorithm with those obtained using the least-square error algorithm are compared. |
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| Keywords: | identification estimation transfer function vibration |
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