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本文提出了一种具有可调参数的模型简化新方法,此法从系统动态特性上揭示了简化模型与原系统之间“类等效”的对应关系.由对系统主要频率响应数据的拟合(或最优化方法)确定参数.降阶模型不仅保持高阶系统的稳态特性(低频特性)和稳定性,还能按设计者需要有选择地保持原系统的其它主要性能(例如带宽、相对稳定性等)、保持其它任意频段的特性.最后,文章给出实例.
In this paper, a new method of model simplification with adjustable parameters is proposed. This method reveals the “class equivalence” correspondence between the simplified model and the original system from the dynamic characteristics of the system. From the fitting of the system’s main frequency response data (Or optimization method). The reduced-order model not only maintains the steady-state characteristics (low-frequency characteristics) and stability of higher-order systems, but also selectively maintains other key properties of the original system (eg bandwidth, Stability, etc.), to maintain the characteristics of any other frequency band.Finally, the article gives examples.