Nonstationary robust control for time-varying system
Nonstationary robust control for time-varying system
复制标题
时变系统的非平稳鲁棒控制
DOI：
10.23919/acc.2004.1383928
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
K. Yoshida
中科院分区：
文献类型：
--
作者：
M. Otsuki;K. Yoshida
提出了一种考虑各种不确定性的时变系统非平稳鲁棒控制器的综合方法。对于不确定性，将定标化的结构不确定性作为参数变化的权值和设计函数。同时，在频域中对控制对象的模型误差进行包络的滤波器对非结构化不确定性进行计数。以变长度钢丝绳为控制对象，讨论了钢丝绳的振动控制问题。通过对对象受到扰动和参数变化情况的数值计算，验证了控制器在时间域和频域的性能。同时考虑了这两种不确定性，所设计的控制器具有较好的鲁棒性。
This work presents a synthesis method of nonstationary robust controller for a time-varying system considering various uncertainties. For the uncertainties, a scaled structured uncertainty is regarded as weightings for variations of parameters and a design function in the time domain. Meanwhile, a filter enveloping model errors of a control object in the frequency domain counts an unstructured uncertainty. A wire changing its length is adopted as the controlled object and then its vibration control is discussed as a practical problem for solution. The performances of controllers are demonstrated in the time and the frequency domains through the numerical calculations for the case that the object is subjected to disturbance and variation of parameters. The proposed controller designed by considering both uncertainties shows the advantages for the robustness.