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arXiv 2011.11923eess.SYcs.SY
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一种基于迭代学习控制的无模型回路成形方法

A Model-Free Loop-Shaping Method based on Iterative Learning Control

Li-Wei Shih, Cheng-Wei Chen

摘要:

在控制设计中,回路成形方法已经发展了许多技术。虽然大多数回路成形方法应用开环受控对象的模型,但所得到的性能取决于动态模型的准确性。本文旨在发展一种无模型的回路成形技术。其核心思想是将模型匹配问题转化为轨迹跟踪问题。为了实现期望的环路增益,我们需要确定控制输入,使得系统输出跟踪环路增益函数的脉冲响应。在本文中,无模型迭代学习控制(ILC)算法应用于解决这个跟踪问题。一旦迭代学习控制收敛,就可以构造满足期望环路增益的反馈控制器。这种方法不需要被控对象的模型,因此它提供了更好的性能回路成形控制设计。通过对一个三阶对象的数值仿真验证了所提出方法的有效性。

英文摘要:

Many techniques have been developed for the loop-shaping method in control design. While most loop-shaping methods apply a model of the open-loop controlled plant, the resulting performance depends on the accuracy of the dynamical model. This paper aims to develop a model-free loop-shaping technique. The core idea is to convert the model matching problem to a trajectory tracking problem. To achieve the desired loop gain, we need to determine the control input such that the system output tracks the impulse response of the loop gain function. In this paper, a model-free iterative learning control (ILC) algorithm is applied to solve this tracking problem. Once the ILC converges, the feedback controller that meets the desired loop gain can then be constructed. This method does not require the model of the controlled plant; hence it provides better performance of loop-shaping control design. The proposed method is validated through numerical simulation on a third order plant.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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