PID控制系统的创新—论人工智能技术怎样才能有助于控制系统(英文)

THE INNOVATION OF A PID CONTROL SYSTEM——A STRIKING FACT ABOUT HOW A.I.CAN HELP SYSTEM

阐明如何通过人工智能技术(如知识库产生式系统等)与有效应用 PID 控制器的某些新颖想法相结合来构成一种性能更理想的创新的 PID 控制系统。文中所创新的系统直接辨识与系统瞬态和稳态性能紧密相关的控制特性;借助于人工智能技术,以一种由对所获得信息进行判断来决定采用每一种控制模式(如 P、I 及 D 模式,两种甚至三种作用的联合模式,以及开环和闭环控制相结合作用的模式等)的新型方法,使系统能按更良好的方式运行.这种创新的 PID 控制系统在对象或系统带有明显不确定性、非线性以及其它所不希望的控制特性时,拥有更多的智能作用,并且系统应该是更快速、更精确和更稳定的.通过比较获得的仿真结果证明,本文所创新的系统在自动控制实践中是一种具有广泛应用价值的技术方法.

This paper attempts to show how through the use of Artificial Intelligence(AI)techniques,such as the knowledge based productions systems etc,together with some novel ideas about making use ofPID controller,an innovated PID control system with much more desirable performance could be built.The sys-tem innovated in this paper identifies the control characteristics related tightly to the system transient behaviorand that in steady state,With the aid A.I.techniques a novel approach of using each control mode(for in-stance,the P.I.and D modes,combination modes of any two or even three,and combined action modesof open and closed loop control etc.)according to the needs decided by the judgement from the obtained infor-mation,the system can be operated in the more favorable manner.Such an innovated PID control systemwould act more intelligently in dealing with plant/system with significant uncertainty,nonlinearity and otherundesirable properties for control,it would be faster,more accurate with better stability.Simulation results oncomparative basis show that the system innovated in this paper is a powerful technique promising wideapplicability in automatic control practice.