纯水液压同步系统的研究与分析
发布时间：2019-02-19 14:38
【摘要】：纯水液压传动技术是把纯水(其中包括淡水和海水)作为工作介质的一种液压传动技术。由于纯水水源广泛,没有污染,阻燃性能好等优点,世界各国都在积极开展纯水液压传动的研究与开发工作,这个领域已成为液压工业技术进步与创新的几个重要领域之一。 在查阅大量国内外资料的基础上,论文综述了纯水液压传动技术的研究现状和发展趋势,提出了本文的研究内容和方向。通过对纯水液压同步系统同步控制的研究,为纯水液压传动的应用提供一定的理论依据。 本文构建了一个纯水液压同步系统。该系统由主动缸系统和从动缸系统两部分组成,以从动缸系统作为主要研究对象。将主动缸的位移信号作为从动缸的指令信号,通过对从动缸系统的控制调节,使从动缸的位移始终保持和主动缸一致,从而实现系统双缸的同步运动。考虑到插装阀可方便地进行逻辑组合、锥阀磨损的自我补偿能力强、防漏能力强,适合大流量的液压系统的特点,系统的方向控制元件采用滑阀作为先导阀、由插装阀组成的四通逻辑块作为主阀。执行元件采用了纯水液压缸。主动缸的速度由手动节流阀来调节,而从动缸的速度由比例调速阀来控制。 分别建立了插装阀、液压缸的数学模型,应用AEMsim建立了比例调速阀的数学模型,在此基础上,根据系统的实际参数建立了插装阀控液压缸的动力机构及从动缸控制系统的数学模型,并从理论上对开环、闭环系统进行了动、静态和稳定性分析。应用计算机工程软件MATLAB/Simulink工具箱对系统进行了仿真分析,得到和理论分析相同的结论。针对纯水液压传动的技术特点,采用PID控制方式对系统进行校正,选择了适宜的PID参数。并对校正前后的静动态特性进行了仿真比较分析。通过PID校正,系统达到了比较好的控制性能。
[Abstract]:Pure water hydraulic transmission technology is a hydraulic transmission technology which uses pure water (including fresh water and seawater) as working medium. Due to the advantages of wide range of pure water sources, no pollution, good flame retardancy and so on, all countries in the world are actively developing the research and development of pure water hydraulic transmission, which has become one of the most important fields in the technical progress and innovation of hydraulic industry. On the basis of consulting a large number of domestic and foreign data, this paper summarizes the research status and development trend of pure water hydraulic transmission technology, and puts forward the research content and direction of this paper. Through the research on synchronous control of pure water hydraulic synchronous system, it provides certain theoretical basis for the application of pure water hydraulic transmission. In this paper, a pure water hydraulic synchronization system is constructed. The system consists of active cylinder system and follower cylinder system. The displacement signal of the active cylinder is taken as the instruction signal of the follower, and the displacement of the follower is kept consistent with the active cylinder through the control and adjustment of the follower system, so that the synchronous motion of the two cylinders of the system is realized. Considering the convenient logical combination of cartridge valves, the self-compensating ability of cone valves for wear, the strong leakproof capability and the characteristics of hydraulic systems suitable for large flow rates, slide valves are used as pilot valves in the direction control elements of the system, A four-way logic block composed of cartridge valves is used as the main valve. The actuator adopts pure water hydraulic cylinder. The speed of the active cylinder is regulated by the manual throttle valve, while the speed of the follower cylinder is controlled by the proportional speed regulating valve. The mathematical models of cartridge valve and hydraulic cylinder are established, and the mathematical model of proportional speed regulating valve is established by using AEMsim. According to the actual parameters of the system, the mathematical models of the power mechanism and the follower control system of the cartridge valve controlled hydraulic cylinder are established, and the dynamic, static and stability analysis of the open-loop and closed-loop system is carried out theoretically. The computer engineering software MATLAB/Simulink toolbox is used to simulate and analyze the system, and the conclusion is the same as the theoretical analysis. According to the technical characteristics of pure water hydraulic transmission, the PID control method is adopted to correct the system, and the appropriate PID parameters are selected. The static and dynamic characteristics before and after correction are compared and analyzed by simulation. Through PID correction, the system achieves better control performance.
【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
[Abstract]:Pure water hydraulic transmission technology is a hydraulic transmission technology which uses pure water (including fresh water and seawater) as working medium. Due to the advantages of wide range of pure water sources, no pollution, good flame retardancy and so on, all countries in the world are actively developing the research and development of pure water hydraulic transmission, which has become one of the most important fields in the technical progress and innovation of hydraulic industry. On the basis of consulting a large number of domestic and foreign data, this paper summarizes the research status and development trend of pure water hydraulic transmission technology, and puts forward the research content and direction of this paper. Through the research on synchronous control of pure water hydraulic synchronous system, it provides certain theoretical basis for the application of pure water hydraulic transmission. In this paper, a pure water hydraulic synchronization system is constructed. The system consists of active cylinder system and follower cylinder system. The displacement signal of the active cylinder is taken as the instruction signal of the follower, and the displacement of the follower is kept consistent with the active cylinder through the control and adjustment of the follower system, so that the synchronous motion of the two cylinders of the system is realized. Considering the convenient logical combination of cartridge valves, the self-compensating ability of cone valves for wear, the strong leakproof capability and the characteristics of hydraulic systems suitable for large flow rates, slide valves are used as pilot valves in the direction control elements of the system, A four-way logic block composed of cartridge valves is used as the main valve. The actuator adopts pure water hydraulic cylinder. The speed of the active cylinder is regulated by the manual throttle valve, while the speed of the follower cylinder is controlled by the proportional speed regulating valve. The mathematical models of cartridge valve and hydraulic cylinder are established, and the mathematical model of proportional speed regulating valve is established by using AEMsim. According to the actual parameters of the system, the mathematical models of the power mechanism and the follower control system of the cartridge valve controlled hydraulic cylinder are established, and the dynamic, static and stability analysis of the open-loop and closed-loop system is carried out theoretically. The computer engineering software MATLAB/Simulink toolbox is used to simulate and analyze the system, and the conclusion is the same as the theoretical analysis. According to the technical characteristics of pure water hydraulic transmission, the PID control method is adopted to correct the system, and the appropriate PID parameters are selected. The static and dynamic characteristics before and after correction are compared and analyzed by simulation. Through PID correction, the system achieves better control performance.
【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
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