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Modified PI controller for the stabilization of high-order unstable delayed systems with complex conjugate poles and a minimum phase zero

机译:修改后的 PI 控制器,用于稳定具有复共轭极点和最小零相位的高阶不稳定时滞系统

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This work deals with the stabilization problem of a particular class of high-order unstable linear systems with time delay. In particular, systems with one unstable pole,q —1 complex conjugate stable poles and one minimum phase zero. To solve this problem a modified version for the traditionalPIcontroller, called in this work the Proporcional Integral FilteredPIf, is proposed. This new scheme includes a low-pass first order filter and allows improving the existing results on controlling high-order systems with time delay. Necessary and sufficient conditions for the existence of thePIfcontroller are expressed in terms of the parameters of the system and the maximum allowable time-delay magnitude. The proposed control scheme is illustrated by a numerical example applied to the temperature control of an unstable Continuously Stirred Tank Reactor (CSTR) linear model focused on the production of propylene glycol.
机译:这项工作解决了具有时滞的一类特殊的高阶不稳定线性系统的稳定问题。特别地,具有一个不稳定极,q-1个复共轭稳定极和一个最小相位零的系统。为了解决这个问题,提出了传统PI控制器的改进版本,在本工作中称为Proportcional Integral FilteredPIf。这种新方案包括一个低通一阶滤波器,并可以改善在控制时滞上具有高阶系统的现有结果。 PIf控制器存在的必要条件和充分条件用系统参数和最大允许时间延迟量表示。通过数值示例说明了所提出的控制方案,该数值示例适用于以丙二醇生产为重点的不稳定连续搅拌釜反应器(CSTR)线性模型的温度控制。

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