Uncertainty Modeling and Robust Control for LCL Resonant Inductive Power Transfer System
Uncertainty Modeling and Robust Control for LCL Resonant Inductive Power Transfer System
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DOI：
10.6113/jpe.2013.13.5.814
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发表时间：
2013-09
影响因子：
1.4
通讯作者：
X. Dai;Yang Zou;Yue Sun
中科院分区：
文献类型：
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作者：
X. Dai;Yang Zou;Yue Sun
LCL谐振式感应电能传输(IPT)系统因其具有滤波能力强、轻载效率高、单位功率因数等特点而得到越来越广泛的应用。然而，由于系统参数的不确定性、高阶性和切换的非线性，使得系统的建模和控制器设计变得极其困难。针对LCL谐振IPT系统，提出了一种频率和负载不确定性的建模方法。利用线性分式变换方法，将不确定部分从系统模型中分离出来。引入了一种带权函数的鲁棒控制结构，并利用结构奇异值控制方法提高了系统的摄动抑制和参考跟踪性能。对控制器的性能进行了分析。仿真和实验结果验证了所提出的鲁棒控制方法和分析结果。该控制方法不仅保证了系统的稳定性，而且提高了系统在扰动下的性能。
The LCL resonant inductive power transfer (IPT) system is increasingly used because of its harmonic filtering capabilities, high efficiency at light load, and unity power factor feature. However, the modeling and controller design of this system become extremely difficult because of parameter uncertainty, high-order property, and switching nonlinear property. This paper proposes a frequency and load uncertainty modeling method for the LCL resonant IPT system. By using the linear fractional transformation method, we detach the uncertain part from the system model. A robust control structure with weighting functions is introduced, and a control method using structured singular values is used to enhance the system performance of perturbation rejection and reference tracking. Analysis of the controller performance is provided. The simulation and experimental results verify the robust control method and analysis results. The control method not only guarantees system stability but also improves performance under perturbation.