【作者】 孙慢；

【导师】 姜万录；

【作者基本信息】 燕山大学 ， 机械电子工程， 2004， 硕士

【摘要】 目前，电液伺服系统已被广泛地应用于航空航天、船舶、冶金等重要领域。由于传统的电液伺服理论中建立的数学模型是在系统工作点附近利用小偏差理论进行线性化得到的线性模型，而系统工作点在实际工作时是不断变化的，从而使得系统的线性化数学模型适应性较差。基于知识和不依赖于精确数学模型的智能控制给这类问题的解决带来新的思路。基于物元分析和可拓学的可拓控制就是智能控制的一个新分支。可拓学以客观世界中的矛盾问题为研究对象，提出了矛盾可以化为相容的基本思想。本研究就是以此思想为基础，提出了可拓控制算法，对电液伺服系统的可拓控制问题进行了深入的研究。本文主要完成了以下工作:查阅了大量关于可拓学的著作和论文，将可拓学的理论和方法用于电液伺服控制领域，提出了电液伺服系统的可拓控制算法，对可拓控制器的结构和具体实现进行了深入研究，探讨了上层可拓控制器的实现问题，改进了基本可拓控制器的控制算法，并用这类可拓控制器对电液伺服控制系统做了仿真研究和实验研究，研究结果表明可拓控制器具有良好的控制品质，验证了可拓控制在电液伺服系统应用中的可行性与优越性。对实验室建造的热轧卷取机系统的半物理模型建立了数学模型，并在此基础上建立了双闭环控制系统的仿真框图，应用Simulink软件包建立了电液伺服控制系统的仿真模型，分别采用不同的控制策略对控制系统进行了性能对比仿真研究。用LabVIEW6i图形化软件编程实现了对电液伺服控制系统的计算机控制。分别采用本文所提出的可拓控制策略和PID控制策略，在实验室建造的热轧卷取机踏步控制系统半物理模型上进行了实验研究。仿真和实验结果均证明，采用本文提出的可拓控制后，助卷辊能够更快速、平稳地实现自动台阶回避。更多还原

【Abstract】 In recent years, electro-hydraulic servo system has widely been applied to aviation, spaceflight, shipping and metallurgy fields etc. The adaptability of the system is not very good, because the maths model of the typical electro-hydraulic servo system is always the linear model gained from small error theory. The intelligent control that is based on knowledge and not reliant to the precise maths model gives new ideas for solving these problems. Extension control which is based on matter element and extenics is a new branch of the artificial intelligent control. Extenics aims at researching the inconsistent problems of the objective world. It brings forward the basic idea on transforming inconsistency to consistency. This paper, based on this idea and integrating related literature and information, applies extension theories and methods to control field and brings forward the arithmetic of extension control to control electro-hydraulic servo system.The following will introduce the main work finished:After looking up a lot of bookings and papers about extenics, I apply the theories of extenics to control field and research the arithmetic of extension control. Implementation of the upper extension controller and improvement of the control algorithm in the basic controller are developed. Results of simulation and experiment on the physical simulation model built in laboratory show that the extension control is of good performance and prove that the extension control is feasible and superior in the electro-hydraulic servo system.The mathematical model of electro-hydraulic servo system is given. The simulation structure of control system with double closed loops is built. The Simulink structure of electro-hydraulic servo system is built. Making use of different control methods, a series of performance contrast simulation experiments are conducted. <WP=6>The computer control of electro-hydraulic servo system is realized by using LabVIEW6i. Making use of extension control and PID control, many experiments are conducted on the physical simulation model in the laboratory. Results of simulation and experiment prove that after we use the composite control method, unit roller can evite the step faster and more placidly.更多还原