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首页> 外文期刊>International Journal of Control >Flatness-based active disturbance rejection control for linear systems with unknown time-varying coefficients
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Flatness-based active disturbance rejection control for linear systems with unknown time-varying coefficients

机译：时变系数未知的线性系统基于平坦度的主动扰动抑制控制

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摘要

A flatness-based active disturbance rejection control approach is proposed to deal with the linear systems with unknown time-varying coefficients and external disturbances. By selecting appropriate nominal values for the parameters of the system, all the deviation between the nominal and actual dynamics of the controlled process, as well as all the external disturbances can be viewed as a total disturbance. Based on the accurately estimated total disturbance with the aid of the proposed extended state observer, a linear proportional derivative feedback control law taking into account the derivatives of the desired output is designed to eliminate the effect of the total disturbance on the system performance. Finally, the load frequency control problem of a single-area power system with non-reheated unit is employed as an illustrative example to demonstrate the effectiveness of the proposed approach.
机译：针对具有未知时变系数和外部干扰的线性系统，提出了一种基于平坦度的主动干扰抑制控制方法。通过为系统的参数选择适当的标称值，可以将受控过程的标称和实际动力学之间的所有偏差以及所有外部干扰视为总干扰。在提出的扩展状态观察器的帮助下，基于精确估算的总扰动，设计了一种线性比例导数反馈控制律，该律考虑了期望输出的导数，以消除总扰动对系统性能的影响。最后，以非再加热单元的单区域电力系统的负载频率控制问题为例，说明了该方法的有效性。

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