报告题目：Feedback limitations in nonlinear discrete-time control

报 告 人：李婵颖研究员

所在单位：中国科学院数学与系统科学研究院

报告时间：2022年8月1日 10: 00-11: 00

报告地点：腾讯会议：889-866-971

会议链接：https://meeting.tencent.com/dm/aIL14zDA5tDX

校内联系人：韩月才 hanyc@jlu.edu.cn

报告摘要：An interesting phenomenon occurs when one attempts to control systems with output nonlinearity growing faster than linearity, where similarities between the continuous- and discrete-time cases of adaptive control no longer exist. It is generally known that a large class of continuous-time nonlinear parametric systems, regardless of how fast the growth rate is, can be globally stabilized by the nonlinear damping or back-stepping approach in adaptive control. However, fundamental difficulties arise for the discrete-time case. These difficulties are caused by the inherent limitations of the feedback principle in dealing with uncertainties, which means that systems with uncertainties beyond the feedback capability cannot be stabilized by any discrete-time feedback control law. This talk studies the stabilizability of discrete-time nonlinear parametric systems and tries to give an appropriate characterization of feedback limitations.

报告人简介：李婵颖本科毕业于四川大学数学系，在中国科学院数学与系统科学研究院获硕士与博士学位，其后在美国韦恩州立大学及香港大学从事博士后研究，现为中国科学院数学与系统科学研究院研究员。获国家自然科学基金委杰出青年基金与优秀青年基金，中国工业与应用数学学会青年科技奖以及中国控制会议最佳论文奖。研究兴趣包括非线性自适应控制、系统辨识以及随机控制等。