电液数字控制技术在同步系统中的应用研究
发布时间：2018-11-23 12:18
【摘要】：在液压系统中,多执行器的同步控制是一个重要的研究课题。随着现代科学技术的飞速发展,越来越多的工程机械、冶金机械、加工制造设备等对液压同步系统的控制精度提出了更高的要求。电液数字控制技术作为液压领域中的新型控制方式,它与现代控制理论相结合所形成的数字控制系统,具有成本低、可靠性高、性能优越等优点,将其应用到液压同步控制中,是提高液压系统多执行器同步精度的重要手段,也是液压同步技术发展的重要趋势。 本文以铅电解残阳极洗涤机作为研究对象,针对该设备使用比例阀控制液压马达的提升机构,在实际生产中所出现的问题,进行了改进,即采用电液数字阀控制液压缸的提升装置来使铅残阳极板做升降运动；分析了改进后洗涤机提升装置的工作原理,并指出高精度的双缸同步控制是保证机构正常运行的前提条件；根据改进后提升装置运动过程中的受力情况,设计完成了该提升装置的电液数字同步控制系统,选取了数字阀、液压缸、液压泵、位移传感器等相应的液压元件,在控制方式上采用“主从式”的控制策略；最后建立了电液数字同步控制系统的数学模型,应用MATLAB／Simulink仿真软件对控制系统进行仿真,在仿真的基础上增加PID校正环节,以进一步提高了系统的同步性能,保证改进后洗涤机提升装置能更好的满足实际生产需要。 研究结果表明,采用电液数字控制技术的液压同步系统,控制结构简单,抗干扰性好,且数字阀能够做到精密的流量调节,从而不受液压缸负载变化以及油路中不同液压缸的制造精度误差和泄漏误差对系统同步性能的影响,使系统获得较高的同步控制的精度。
[Abstract]:Synchronous control of multiple actuators is an important research subject in hydraulic system. With the rapid development of modern science and technology, more and more construction machinery, metallurgical machinery, processing and manufacturing equipment have put forward higher requirements for the control accuracy of hydraulic synchronous system. Electro-hydraulic digital control technology is a new control method in hydraulic field. The digital control system, which is formed by combining with modern control theory, has the advantages of low cost, high reliability, superior performance and so on. It is an important means to improve the synchronization accuracy of multiple actuators in hydraulic system, and also an important trend in the development of hydraulic synchronization technology. This paper takes the lead electrolytic residual anode washing machine as the research object, aiming at the problems in the actual production of the lifting mechanism of the hydraulic motor controlled by proportional valve. That is to say, the lifting device of hydraulic cylinder is controlled by electro-hydraulic digital valve to make lead residue anode plate move up and down. The working principle of the improved hoisting device of the washing machine is analyzed, and it is pointed out that the high precision double cylinder synchronous control is the precondition to ensure the normal operation of the mechanism. According to the mechanical condition of the improved lifting device, the electro-hydraulic digital synchronous control system is designed and completed, and the corresponding hydraulic components, such as digital valve, hydraulic cylinder, hydraulic pump, displacement sensor and so on, are selected. The "master-slave" control strategy is adopted in the control mode. Finally, the mathematical model of the electro-hydraulic digital synchronous control system is established, and the control system is simulated by using MATLAB/Simulink simulation software. On the basis of the simulation, the PID correction link is added to further improve the synchronization performance of the system. Ensure that the improved washing machine hoist can better meet the actual production needs. The research results show that the hydraulic synchronous system using electro-hydraulic digital control technology has simple control structure, good anti-interference, and the digital valve can achieve precise flow regulation. Therefore, it is not affected by the variation of hydraulic cylinder load and the error of manufacturing accuracy and leakage of different hydraulic cylinder in oil circuit on the synchronization performance of the system, so that the system can obtain higher precision of synchronization control.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH137
本文编号：2351587
[Abstract]:Synchronous control of multiple actuators is an important research subject in hydraulic system. With the rapid development of modern science and technology, more and more construction machinery, metallurgical machinery, processing and manufacturing equipment have put forward higher requirements for the control accuracy of hydraulic synchronous system. Electro-hydraulic digital control technology is a new control method in hydraulic field. The digital control system, which is formed by combining with modern control theory, has the advantages of low cost, high reliability, superior performance and so on. It is an important means to improve the synchronization accuracy of multiple actuators in hydraulic system, and also an important trend in the development of hydraulic synchronization technology. This paper takes the lead electrolytic residual anode washing machine as the research object, aiming at the problems in the actual production of the lifting mechanism of the hydraulic motor controlled by proportional valve. That is to say, the lifting device of hydraulic cylinder is controlled by electro-hydraulic digital valve to make lead residue anode plate move up and down. The working principle of the improved hoisting device of the washing machine is analyzed, and it is pointed out that the high precision double cylinder synchronous control is the precondition to ensure the normal operation of the mechanism. According to the mechanical condition of the improved lifting device, the electro-hydraulic digital synchronous control system is designed and completed, and the corresponding hydraulic components, such as digital valve, hydraulic cylinder, hydraulic pump, displacement sensor and so on, are selected. The "master-slave" control strategy is adopted in the control mode. Finally, the mathematical model of the electro-hydraulic digital synchronous control system is established, and the control system is simulated by using MATLAB/Simulink simulation software. On the basis of the simulation, the PID correction link is added to further improve the synchronization performance of the system. Ensure that the improved washing machine hoist can better meet the actual production needs. The research results show that the hydraulic synchronous system using electro-hydraulic digital control technology has simple control structure, good anti-interference, and the digital valve can achieve precise flow regulation. Therefore, it is not affected by the variation of hydraulic cylinder load and the error of manufacturing accuracy and leakage of different hydraulic cylinder in oil circuit on the synchronization performance of the system, so that the system can obtain higher precision of synchronization control.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH137
【参考文献】
相关期刊论文 前10条
1 贾鹏光，吕伟华;日本数字调速阀静动态性能的研究[J];重庆大学学报(自然科学版);1994年02期
2 张利平 ,魏泽鼎;增量式电液数字控制阀开发中的若干问题[J];工程机械;2003年05期
3 文斌;胡杰;;直动电液数字阀结构设计与控制[J];国内外机电一体化技术;2009年01期
4 施光林,史维祥,李天石;液压同步闭环控制及其应用[J];机床与液压;1997年04期
5 施光林,钟廷修;高速电磁开关阀的研究与应用[J];机床与液压;2001年02期
6 吴博,吴盛林,任好玲;非对称阀控非对称缸系统建模和仿真研究[J];机床与液压;2004年08期
7 康天增;;步进电机驱动的数字阀设计探讨[J];机电设备;1991年02期
8 王传礼,许贤良;阀控非对称液压缸机构建模探讨[J];矿山机械;1998年07期
9 黄海涛;;液压缸同步回路的设计与应用[J];流体传动与控制;2006年05期
10 王仁福;;几种典型液压同步系统探讨[J];四川冶金;2007年03期
相关硕士学位论文 前3条
1 王成宾;步进电机控制的液压数字阀的建模与仿真研究[D];太原理工大学;2006年
2 赵恩刚;数字式纯水液压溢流阀的设计研究[D];昆明理工大学;2008年
3 何谦;基于高速开关阀的液压同步控制系统设计与研究[D];湖南师范大学;2008年
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