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为了改善风能转换系统(WECS)非线性模型的线性化水平,本文以其为研究对象,围绕工况点且基于一阶泰勒展开提出了一种结果部分为仿射线性结构的Takagi-Sugeno(T-S)模糊建模方法;然后利用该方法处理WECS模型中的非线性,给出了具体的T-S模糊建模步骤并得到了高精度的WECS线性控制设计模型;最后,基于模糊逻辑工具箱对该T-S模糊模型进行了模型验证。仿真结果显示,该T-S模糊建模方法具有任意精度的非线性模型及动态特性逼近能力。
In order to improve the linearization of the WECS nonlinear model, this paper takes Takara-Sugeno (TS) as an affine linear structure based on the first-order Taylor expansion ), And then use this method to deal with the nonlinearities in the WECS model. The specific TS fuzzy modeling steps are given and a high-precision WECS linear control design model is obtained. Finally, based on the fuzzy logic toolbox, The fuzzy model is validated by the model. The simulation results show that the T-S fuzzy modeling method has the nonlinear model of arbitrary accuracy and the ability to approach dynamic characteristics.