模糊PID控制技术研究发展回顾及其面临的若干重要问题

Review of Fuzzy PID Control Techniques and Some Important Issues

简要回顾了模糊ＰＩＤ控制器的研究发展状况．系统地归纳了模糊ＰＩＤ控制器的 基本形式．讨论了阻碍模糊控制技术发展的几个重要理论问题．包括系统化设计方法，控制 性能优于传统ＰＩＤ控制器的模糊控制器设计，模糊控制器非线性逼近能力及其量化指标，模 糊系统的规则爆炸．文中试图对有关问题的内涵进行重新定义，以及探求解决难题的关键． 如将模糊系统中的“规则爆炸”问题更正为“参数效率”问题．最后，提出了对模糊控制 理论与技术发展的思考，其中特别强调应把“简单性”作为智能控制器设计中的基本策略．

Some latest progresses in fuzzy PID control studies are briefly presented. Based on their control principles, various fuzzy PID controllers are classified to illustrate their inherent differences. The paper concentrates on four issues that are important in order to achieve widespread applications of fuzzy (PID) control. They are systematic design approaches, design with guaranteed performance, universal approximation capability and its quantitative measures, and fuzzy rule explosion. Each issue is discussed and, when needed, redefinition is introduced to better clarify the points on the issue. For instance, 'rule explosion' can be reconsidered as 'parameter efficiency.' Finally, we summarize and provide the perspectives of the development of fuzzy control theory and techniques. We especially point out that simplicity should be fundamental to the design of intelligent controllers, including fuzzy controllers.