| 液压位置系统及其噪声模型的辨识 |
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| 引用本文： | 熊宇飞,陆元章.液压位置系统及其噪声模型的辨识[J].机械工程学报,1989,25(2):55-60，6. |
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| 作者姓名： | 熊宇飞 陆元章 |
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| 作者单位： | 上海交通大学 |
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| 摘 要： | 本文讨论了用ARNAX时间序列模型来辨识液压系统的阶和参数，同时得到系统的干扰噪声模型。文中提出的增广最小二乘法和BIC定阶准则的结合，比已有方法辨识参数和阶的精度要高。进一步根据估计参数的渐近正态性确定模型的子阶和时滞。文中应用该方法辨识了液压位置系统及其噪声模型的阶和参数。仿真和实测阶跃响应比较，证明得到的辨识模型是有效的。
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| 关 键 词： | 时间序列 系统辨识 液压位置系统 增广最小二乘法 |
IDENTIFICATION OF HYDRAULIC POSITION SYSTEM AND NOISE MODEL |
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| Xiong Yufei,Lu Yuanzhang.IDENTIFICATION OF HYDRAULIC POSITION SYSTEM AND NOISE MODEL[J].Chinese Journal of Mechanical Engineering,1989,25(2):55-60，6. |
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| Authors: | Xiong Yufei Lu Yuanzhang |
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| Affiliation: | Shanghai Jiaotong University |
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| Abstract: | This paper discusses the order and parameter identification of hydraulic system by time eries ARMAX. The cooperation of extended least-square and BTC criterion proposed here has higher accuracy than other method. The suborder and delay of the model are determined. According to the asymptotically Gaussian distribution of estimated parameter. This method is applied to identifying the order and parameter of hydraulic position system and its noise model. The effectiveness of identified model is illustrated by simulation step response in comparison with measured step response. |
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