随着当代科学和技术的发展, 复杂非线性系统和控制理论研究不断深入, 应用领域不断扩大, 已影响了科技和社会领域的许多方面. 针对当今该领域的研究难点和重点, 本文集中讨论了复杂非线性系统控制研究中的3个关键问题, 包括非光滑系统控制、网络化系统控制、临界态分析与控制. 一方面是对在相关研究领域中的部分科研成果做一个简要的总结; 另一方面, 想借此机会在自动化学会控制理论专业委员会成立50周年之际向专业委员会表示感谢和祝贺.

The theoretical research and practical applications  of complex nonlinear systems and control have drawn more and more ttention following the development of modern science and technologyin various branches of scientific and social areas.  In view of theresearch difficulties and significance in the studies of complexnonlinear systems and control, the paper investigates three key  problems, including nonsmooth systems and control, networked systems
and control, and analysis and control of criticality.  On the one and, the paper is a brief summary of some of our obtained research results in the related areas. On the other hand, it can also be  viewed as a note to show our gratitude and congratulations to the 50th anniversary of Technical Committee of Control Theory of Chinese Association of Automation.