| 摘 要: Wiener系统的结构特点，使得其线性动态环节的输出不可测量，导致现有方法无法直接用于Wiener非线 性系统的线性环节的定阶。为了准确确定一类Wiener系统包含的FIR函数的阶次，提出了一种残差曲线斜率法。该方 法基于残差曲线的斜率来获得FIR的阶次。并且，该方法在不进行参数辨识的基础上，仅利用测量到的输入输出输出数 据，来获得FIR的阶次。该算法既减小了计算量，也提高了定阶准确度。数值仿真验证了算法的有效性。 |
| 关键词: Wiener系统；阶次辨识；残差分析 |
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中图分类号: TP391.9
文献标识码: A
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| 基金项目: 本文系江苏省产学研合作项目(BY2018231)；江苏省高等学校自然科学研究项目(19KJD510001)；淮阴师范学院大学生创新项目资助. |
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| Order Identification Algorithm for the Dynamic Block of a Wiener System |
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QI Guofang,JING Shaoxue,FAN Mengsong
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( School of Physics and Electronic Electrical Engineering, Huaiyin Normal University, Huai'an 223300, China)
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| Abstract: Because the output of linear dynamic part is not measurable,the existing methods cannot be directly used to determine the order of linear part in a Wiener system.In order to determine the order of the FIR in a Wiener system accurately,a method based on the slope of the residual is proposed.This method obtains FIR order based on the slope of residual curve.This method only uses the measured input-output data to obtain the order of FIR,and need not estimate the parameters of the system.Thus,the proposed method not only reduces the computational burden,but also improves the accuracy of order determination.Numerical simulation validated the proposed algorithm. |
| Keywords: Wiener system;order identification;residual analysis |
