Feedforward control under the presence of uncertainty
Feedforward control under the presence of uncertainty
复制标题
不确定性存在下的前馈控制
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
S. Skogestad
中科院分区：
文献类型：
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作者：
A. Faanes;S. Skogestad
在本文中，我们研究了模型误差对前馈控制器性能的影响。根据反馈控制的灵敏度函数，我们定义前馈灵敏度 Ss（来自扰动的前馈）和 Sff, r（来自设定点的前馈），作为前馈控制获得的输出误差减少的措施。对于基于反向标称模型的“理想”前馈控制器，前馈灵敏度等于相对模型误差，因此前馈控制必须保持小于 1 才能产生正（阻尼）效果。对于一些常见的模型误差类，我们提供了前馈控制器何时有效的规则，并且我们还设计了μ最优前馈控制器。
In this paper we study the effect of model errors on the performance of feedforward controllers. In accordance with the sensitivity function for feedback control, we define the feedforward sensitivities, Ss (feedforward from disturbance) and Sff, r (feedforward from set-point), as measures for the reduction in the output error obtained by the feedforward control. For “ideal” feedforward controllers based on the inverted nominal model, the feedforward sensitivities equal the relative model errors, which must thus remain less than 1 for feedforward control to have positive (dampening) effect. For some common model error classes we provide rules for when the feedforward controller is effective, and we also design μ-optimal feedforward controllers.