【作者】 刘革；

【导师】 郑艳；

【作者基本信息】 东北大学 ， 控制理论与控制工程， 2015， 硕士

【摘要】 飞剪机是冶金板材行业横切机组的核心设备之一,其主要功能是实现与待剪钢材的速度同步、连续剪切钢板。随着控制技术和电机技术的快速发展,人们对于飞剪系统控制性能的要求也不断提高。实际应用中,通常采用传统PID控制,PID结构简单、易于实现,但是在系统参数变化、存在外干扰等工况变化时控制性能不够理想。分数阶PID控制器作为整数阶PID在分数阶领域的扩展。近年来,得益于计算机技术的飞速发展,分数阶PID控制器的实现成为可能。作为传统PID控制器的升级,因其巨大的发展潜力,有关分数阶控制器的应用问题也得到了广泛的关注。本文尝试将分数阶PID控制方法引入飞剪机的控制器设计中,这对于进一步改善飞剪机的控制性能,深入分数阶PID控制器研究具有重要的理论意义和实际意义。本文首先基于飞剪的工艺背景对飞剪的工作原理、控制原理进行了综合研究。接着,对分数阶微积分理论基础做了分析研究,重点研究了分数阶微积分算子时频域转换法以及频域间接实现方法,并基于近似算法展开阶次选择问题进行了仿真研究。其次,针对飞剪机速度控制问题,分别进行了三种类型的分数阶PID控制器的设计,并与常规PID控制器对比进行仿真研究。仿真结果表明,利用幅值裕量和相位裕量法进行参数整定的分数阶PID控制优于传统PID控制,基于飞剪机速度控制的分数阶PDμ控制在动态性能、跟随性能以及抗扰动能力等方面控制效果最好。最后,本文还将分数阶PID控制器与模糊控制器组合成模糊分数阶PID控制器引入飞剪机速度控制中进行研究,重点研究了模糊分数阶PID控制器参数自整定方法,并进行了仿真实验,仿真结果表明模糊分数阶PID控制器能够能实现控制器参数自整定,可以降低系统的超调量,有效提高飞剪速度控制系统的控制品质。本文给出的分数阶PID控制器和模糊分数阶PID控制器在飞剪机速度控制中的应用研究是探索性的尝试,顺应当前世界工业控制领域向着智能化、信息化的发展趋势,当然也会存在一些问题,希望今后能够继续提高完善,为飞剪机的开发以及分数阶PID控制器的应用研究提供部分理论依据。更多还原

【Abstract】 The flying shear is one of the core equipment of metallurgical industry plate in cross cutting unit,Its main function is shearing plate continuously.With the rapid development of control technology and motor technology,the performance of the control system of flying shear requirements is also rising.The traditional PID with simple structure is easy to implement,but robust is not ideal when system has parameter variations and external disturbances.Factional order PID controller is PID controller extension to the fractional domain,thanks to the rapid development of computer technology recent years,the digital implementation of fractional operators become possible,and application of the fractional order controller has gained wide attention.In order to achieve the goal of improving the performance of the control system of flying shear,we take some reseach about the application of fractional controller in the system of flying shear.Firstly,we do some studies comprehensively based on the technology background of the flying shear principle and flying shear control principle.Then,we studied about the basis of the theory of fractional calculus,especially,focusing on the implementation of fractional operator and the tuning method of the factional order PID controller parameters.Secondly,we design and Simulate the factional order PID controller about the shearing speed control problem,the simulation results show that the system,using amplitude and phase margin setting method of factional order PID controller,has a better dynamic performance than the traditional PID controuler systerm,and the system has a strong anti disturbance when parameters changed.Finally,we designed fuzzy fractional order PID controller by combined factional order PID controller and fuzzy controller,showed the parameter self tuning method of the fuzzy factional order PID controller,and taken some simulation experiments.The simulation results shows that fuzzy fractional order factional order PID controller effectively reduces the overshoot of the system and improve the quality of the speed control system of flying shear.Factional order PID controller and and fuzzy factional order PID controller of the flying shear control introduced in this thesis is a try,they conform to the current trend in the field of industrial control,towards the development of informatization and intelligence.However we,there still be some problems,need to do continous efforts of providing a theoretical basis for the development of flying shear and factionalorder PID controller.更多还原