| 动力学参数估计的频域方法 |
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| 引用本文： | 周兆英,杨进. 动力学参数估计的频域方法[J]. 清华大学学报(自然科学版), 1987, 0(5) |
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| 作者姓名： | 周兆英 杨进 |
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| 作者单位： | 精密仪器与机械学系(周兆英)，精密仪器与机械学系(杨进) |
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| 摘 要： | 本文讨论以谱估计为基础的动力学参数估计方法。它一般包括两步估计算法．即首先由线性系统的输入－输出信号估计其谱密度函数．再由第一步得到的频率响应数据估计系统的传递函数参数。文中从统一形式的性能指标出发，选用不同的加权项而导出不同的频率特性曲线拟合算法，如线性化算法、迭代法、非线性最优化方法以及基于若干基本环节的顺序迭代算法。文中还介绍了这种算法的几个应用实例。这种频域方法适用于一般线性系统的实验建模．具有通用性。
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| 关 键 词： | 动力学系统 频域 谱估计 参数估计 |
Dynamic Parameter Estimation Based on Spectral Analysis |
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| Zhou Zhaoying,Yang Jin. Dynamic Parameter Estimation Based on Spectral Analysis[J]. Journal of Tsinghua University(Science and Technology), 1987, 0(5) |
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| Authors: | Zhou Zhaoying Yang Jin |
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| Affiliation: | Department of Precision Instruments and Mechanology |
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| Abstract: | The dynamic parameter estimation based on spectral analysis is covered together with some applications. It involves two step algorithm: first, an estimate of the spectral density function from input-output signals of a linear system, and then an estimate of its dynamic parameters from frequency response data obtained in the first step. Some parameter estimation algorithms are derived by minimizing a unified form of loss function using different selections of weights. Linearized algorithm, iterative algorithm, nonlinear optimization algorithm and an algorithm based on the sequential iterations of finite element models are then given. The estimation approach is used for some applications and good practical results are obtained. |
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| Keywords: | dynamical system frequency domain spectral estimation parameter estimation. |
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