| 基于LS-SVM飞机大迎角动态辨识方法研究 |
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| 引用本文： | 李正强,张怡哲,邓建华,陈琪.基于LS-SVM飞机大迎角动态辨识方法研究[J].计算机仿真,2009,26(9):28-31. |
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| 作者姓名： | 李正强 张怡哲 邓建华 陈琪 |
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| 作者单位： | 1. 西北工业大学航空学院系统综合与控制工程系,陕西,西安,710072
2. 上海飞机研究所12所,上海,200232 |
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| 摘 要： | 确定飞机在大迎角飞行状态时的动态系统参考模型,对于支持飞机控制系统的稳定性和控制增稳设计有着重要的影响。为了精确描述飞机大迎角机动非定常、非线性数学模型,提出利用最小二乘支持向量机(LS-SVM)对飞机大迎角状态飞行时的非线性动态系统进行辨识,利用网络搜索和交叉验证的方法选择支持向量机参数,并建立了飞机大迎角动力学参考模型,仿真验证显示方法具有较强的泛化能力和较高的辨识效果。
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| 关 键 词： | 最小二乘支持向量机 系统辨识 大迎角 |
A High Angle of Attack Dynamical System Identification Algorithm Based on LS-SVM |
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| LI Zheng-qiang,ZHANG Yi-zhe,DENG Jian-hua,CHEN Qi.A High Angle of Attack Dynamical System Identification Algorithm Based on LS-SVM[J].Computer Simulation,2009,26(9):28-31. |
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| Authors: | LI Zheng-qiang ZHANG Yi-zhe DENG Jian-hua CHEN Qi |
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| Affiliation: | 1. College of Aeronautics;Northwestern Polytechnical University;Xi'an Shanxi 710072;China;2. Shanghai Aircraft Design and Research Institute;Shanghai 200232;China |
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| Abstract: | The high angle of attack (HOAO) dynamical model has an important impact on the aircraft stability control. For a nonlinear and nonstationary modeling of the HOAO,a recognition method based on Least Squares Support Vector Machines (LS-SVM) is proposed. LS-SVM hyper-parameters are optimized with grid-search and cross-validation methods. LS-SVM is applied to model the desired HOAO dynamical system. The research result shows that it has good performance for the identification of nonlinear dynamical system. The ... |
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