| 可分离型和耦合型非线性系统的识别 |
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| 引用本文： | 陈乃立,童忠钫.可分离型和耦合型非线性系统的识别[J].浙江大学学报(自然科学版 ),1993,27(3):404-413. |
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| 作者姓名： | 陈乃立 童忠钫 |
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| 作者单位： | 浙江大学力学系
(陈乃立)，浙江大学机械系(童忠钫) |
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| 摘 要： | 当振动系统的非线性恢复力可分离为速度和位移的函数,或包含位移和速度的耦合项时,本文的频域多项式拟合法,都能加以识别。频域的滤波作用,增强了抗噪能力;多项式的正交性,又显著减少了计算量。仿真试验表明:在各种激励条件下和噪声较强时,该法均能得到满意的识别结果。
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| 关 键 词： | 非线性 系统识别 参数估计 振动 |
The identification of separable and coupled non-linear systems |
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| Chen Naili Tong Zhongfang.The identification of separable and coupled non-linear systems[J].Journal of Zhejiang University(Engineering Science),1993,27(3):404-413. |
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| Authors: | Chen Naili Tong Zhongfang |
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| Affiliation: | Dept. of Mech Engr |
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| Abstract: | The polynomial curve fit technique in frequency domain presented in this paper Can idenli-fy both vibrating system with non-linear restoring forcein which the displacement function can be separated from velocity function or there are coupled termes of displacement and velocity. The filtraction in frequency domain increses noise-resistant property. The orthogonality of polynomials greatly shortens the computing amount. The simulation tests show that satisfactory identification results can be got by this method under various excitations and very noisy conditions. |
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| Keywords: | nonlinearity system identification parameter estimation |
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