煤气阀自动装配线智能控制技术研究

发布时间：2018-01-06 05:36

本文关键词：煤气阀自动装配线智能控制技术研究　出处：《南京理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着自动化技术的发展,工业各领域对于生产质量、效率等性能指标提出更为严苛要求。近年来,工业4.0、制造2025等项目启动,旨在提高制造业的智能化水平,建造现代化的智能工厂。在此背景下,自动装配技术被广泛应用于各行业。本文以液化石油气瓶阀自动装配生产线为工程背景,研究设计煤气阀自动装配控制系统。针对生产线存在的传送链精确定位、螺纹件可靠拧紧以及系统的稳定可靠运行等问题,从以下几个方面展开分析研究:(1)设计了模糊PID全闭环位置控制器。针对目前传送链所存在的定位精度较低现象,提出全闭环控制方案。其中,内环采用交流伺服系统以提高系统运行平稳性;同时,为提高定位精度及定位效率,提出逼近、PID及模糊PID等控制方法,搭建运动系统模型,通过仿真结果的分析,验证模糊PID算法的控制性能更为优异,具有工程应用价值。(2)螺纹件拧紧方法的研究。分析比较多种拧紧控制法,以角度控制法为基础,分析螺纹拧紧原理,解算拧紧角度及贴合扭力值以提供可靠的控制目标值,为拧紧控制的实现奠定基础。同时,进一步提出分阶段控制方法以提高螺纹拧紧可靠性,同时确保实现工件零损坏,降低半成品率。(3)控制系统容错性能研究。分析长期使用下,系统较易出现的可预测故障,针对其中的单工位以及非正常性断电等故障,提出软件冗余容错思想,通过相应的软件编程控制以提高系统运行的稳定性及可操作性。(4)生产线控制系统的总体设计。结合实际需求设计控制系统的功能,针对功能的实现完成电气选型、下位机软件设计及监控程序设计等工作。
[Abstract]:With the development of automation technology, various fields of industry put forward more stringent requirements for production quality, efficiency and other performance indicators. In recent years, industry 4.0, manufacturing 2025 and other projects started. In order to improve the intelligent level of manufacturing industry and build modern intelligent factory. In this context, automatic assembly technology is widely used in various industries. This paper takes the automatic assembly line of LPG cylinder valve as the engineering background. The automatic assembly control system of gas valve is studied and designed. Aiming at the problems of accurate positioning of transmission chain, reliable tightening of thread parts and stable and reliable operation of the system, etc. The fuzzy PID full closed loop position controller is designed from the following aspects. Aiming at the phenomenon of low positioning accuracy in the current transfer chain, a full closed loop control scheme is proposed. The inner ring adopts AC servo system to improve the stability of the system. At the same time, in order to improve the positioning accuracy and positioning efficiency, the approximate pid and fuzzy PID control methods are put forward, and the motion system model is built, and the simulation results are analyzed. It is verified that the fuzzy PID algorithm has better control performance and has engineering application value. Research on tightening method of thread parts. Analysis and comparison of various tightening control methods based on angle control method. The principle of screw thread tightening is analyzed, and the tightening angle and torque value are calculated to provide reliable control target value, which lays the foundation for the realization of tightening control. Further, a phased control method is proposed to improve the reliability of thread tightening, at the same time to ensure the zero damage of workpiece and reduce the rate of semi-finished product. 3) the fault-tolerant performance of the control system is studied. The system is easy to be predicted. The idea of software redundancy fault tolerance is put forward for the single station and abnormal power failure. Through the corresponding software programming control to improve the stability of the system operation and maneuverability. 4) the overall design of the production line control system. Combined with the actual requirements to design the control system function. In view of the realization of the function, the electrical selection, the software design of the lower computer and the design of the monitoring program are completed.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP273

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