基于labview的pid控制器的設計畢業論文-資料下載頁

　　

【正文】 、時變不確定性等因素，所以得到的參數與實際的最佳參數有一定的偏差。今后的研究方向： 進一步學習labview的編程方法和數據采集處理技術，將其靈活運用于過程控制系統的建模、辨識、控制、仿真等多個領域。 進一步改善所設計PID控制器的控制性能，使其更加貼近實際，比如說考慮外界擾動對最佳參數整定的影響，在特殊的控制場合不僅能很快整定參數而且能限幅（如某些工業生產的調節閥門不能全開和全閉）。致謝本文是在宋愛娟老師的悉心指導下完成的。從研究方向的確定，到研究思路和流程的設計，論文的撰寫以及最后定稿的整個過程，都深深浸透著老師的心血。老師嚴謹的治學態度，淵博的知識，踏實的工作作風和樂觀的生活態度都將令我受益終生。在論文完成之際，謹向宋愛娟老師和曲秀云老師致以誠摯的感謝與崇高的敬意! 還要感謝我的同學，他們對本文的最終完成都給予了最大的幫助；在學習上生活一起努力、互相幫助，我們度過了一段快樂難忘的大學生活。 感謝本文中所參考文獻的作者們。 最后，特別感謝多年來養育我的家庭。正是來自家庭的支持，我才有可能來到大學深造，才有可能使我的學習生涯取得更大的進步。家庭給予我無私的幫助和關心，促使我在這個世界成長并明白自身的價值所在。在此，我祝我的家人和親朋好友永遠快樂，健康平安。參考文獻[1] 張毅，周紹磊，:機械工業出版社，2004[2] 徐成波，馮麗萍，2006[3] 楊樂平，2001[4] ，2009[5] Robert H. Bishop著，喬瑞萍，2008[6] [7] 黃友銳，2010[8] 馬建偉，2007[9] 顧德英，羅云林，2007[10] [11] 王建輝，2007[12] ，1991[13] ，2002[14] ，2002[15] ，2004[16] National Instruments Express User 2003 Edition [17] National Instruments Express Getting Started with LabVIEW. April 2003 Edition[18] National Instruments Express Measurements 2003 Edition[19] Barry Sensors，Transducers amp。 York；Prentice Hell[20] LabVIEW Measurements Instruments，2000附錄The Virtual manufacturing technology related concepts and their applicationIn order to survive and develop in the petitive global market，manufacturing sector must be able to meet the requirements of the market raised T、Q、C、S。That is，we should take the shortest product development cycles，the best quality， the lowest cost of manufacturing，the best technical support and aftersales service to win market and customers。To face unpredictable, sustainable development, fast changing market demand，production activities of enterprises must have a high degree of flexibility.In order to improve petitiveness，Enterprises should be able to make rapid changes in market demand quickly，and make reasonable adjustments and replanning on their own products timely。The development of puter software and hardware technology and rapid network technology provides a strong support to achieve this goal。Based on these factors，There are many new concepts、 new ideas emerged In the 9039。s，Virtual Manufacturing is one of them，It represents a new manufacturing system and mode。In the virtual manufacturing，product development is based on digital form of virtual product development and put the needs of users as the first drive，And turn the user ‘s needs into a variety of functional characteristics of the final product。VPD ensure the efficiency of product development and quality, enhance the enterprise39。s rapid response capability and market development。1 The definition and characteristics of virtual manufacturingResearch on virtual manufacturing is still in constant depth, refinement，yet to make its international public definition of a uniform。Different researchers from different angles ，different characteristics description are given，representative include the following：Lawrence Associates’s definition: Virtual manufacturing is an integrated, prehensive manufacturing environment，the aim is to improve all levels of decisionmaking and control。. Air Force Laboratory’s definition：Virtual manufacturing is based on puter modeling, analysis and simulation technology，It is the prehensive application of these technologies，this integrated application enhanced the design and manufacture of all levels，the production capacity of decisionmaking and control。As can be seen from these definitions，virtual manufacturing involves a number of subject areas，it is the prehensive integration and application of the knowledge of these area。Computer simulation, modeling and optimization technology is the core and key of virtual manufacturing technologies。Virtual manufacturing is the all aspect integration of manufacturing Process，It includes product design, processing, assembly and even the production organization and management and scheduling of the Unified Modeling ，forming a running virtual Manufacturing environment，it is supported by software technology，with highperformance hardware，in the puter local area / wide area network，generating digital products， achieving the design, performance analysis, process decisionmaking, manufacturing assembly and quality inspection of the products。It is the digital form of generalized manufacturing system，it is a dynamic simulation of the actual manufacturing process。The socalled virtual is relative to the actual physical product manufacturing system，it is stressed the Computerizing of the operations of manufacturing System。As puter hardware and software technology and extensive application of network technology，virtual manufacturing has the following characteristics：(1) No need to create physical prototypes can predict performance of products，saving manufacturing cost，Shorten the product development cycle。(2) In product development can find problems early，Achieving feedback and correction timely。(3) It is in the form of product development software simulation。(4) Intranetbased or Internetbased enterprise management。2 Types of virtual manufacturingGeneralized manufacturing process includes not only product design and processing, assembly, also includes the organization of production activities of enterprises and control，From this point of view, virtual manufacturing can be divided into three categories：Designcentered VM，Productioncentered VM，controlcentered VM。 Designcentered VMDesigncentered VM emphasizes a unified modelbased manufacturing information，it Simulates ，analyzes，optimization the model of the digital productions，analyzing the aspects of structure and properties，kinematics，dynamics，thermodynamics，assembly of the products，to obtain the product design evaluation and performance prediction results Productioncentered VM Productioncentered VM is in the Constraints of enterprise resource ，Simulating the production process，optimizing different process and its binations。It Analyzes and