大缸径液压装缸机电液位置伺服系统的仿真研究

发布时间：2018-05-17 16:42

本文选题：大缸径液压缸装缸机 + 电液位置伺服控制系统　；参考：《东北大学》2011年硕士论文

【摘要】：随着工程机械行业的发展,液压系统中作为执行元件的液压缸产品种类不断更新,产品数量日益增加,原有液压缸装配设备和装配方式远不能满足现有生产任务的要求。在大缸径液压缸装配过程中,液压缸缸筒和活塞杆组件的中心线快速对中是保证液压缸密封性能、产品装配质量和产品生产效率的关键点,同时也是难点。依据大缸径液压缸的装配要求和现有工业领域中液压缸装配设备的发展现状,对现有大缸径液压装缸机进行结构上的略微改动,改进支撑部分的支撑方式,采用大型、坡度较缓的V型铁作为支撑装置,借用自身重力和钢丝绳棘轮张紧器绑定其缸筒不在X方向上发生偏移,在Y方向采用自定心夹紧机构保证缸筒和活塞杆组件的中心线对中。本文重点是设计电液位置伺服调整装置,在Z方向上采用电液位置伺服控制系统进行跟踪模拟,进行液压元件选型,计算传递函数同时建立数学仿真模型,设计PID控制器,以便更快速、准确地调整被控液压缸的位置,使待装配的液压缸缸筒和活塞杆组件的中心线在Z方向上迅速找正。在X方向上,采用后部推进液压系统使活塞杆组件和缸筒迅速装配。电液位置伺服控制系统的研究是以电液伺服阀一液压缸驱动装置作为被控对象,针对系统时变性、非线性和不确定性建立线性的数学模型,设计常规PID控制器并运用MATLAB7.0/SIMULINK对PID控制器在系统阻尼比变化、加入干扰的情况下进行仿真分析,验证PID控制器具有的静态特性、动态特性和鲁棒性,最终达到大缸径液压缸装配设备的使用要求。大缸径液压缸装配设备和电液位置伺服PID控制系统的研究,具有较大的实际意义和理论参考价值,对实际生产过程中制约大缸径液压缸生产的瓶颈问题提出可信的解决方案,提高产品的内在质量和装配生产效率,从而降低产品故障率和工人的劳动强度,减少售后服务费用,提高产品信誉度并增强产品在本行业中的核心竞争力。
[Abstract]:With the development of construction machinery industry, the types of hydraulic cylinder products in hydraulic system as executive components are constantly updated, the number of products is increasing day by day, the original assembly equipment and assembly mode of hydraulic cylinder can not meet the requirements of existing production tasks. In the process of large diameter hydraulic cylinder assembly, the centerline quick alignment between cylinder and piston rod assembly is the key point to ensure the sealing performance of hydraulic cylinder, product assembly quality and product production efficiency, at the same time, it is also a difficult point. According to the assembly requirements of large cylinder diameter hydraulic cylinder and the development status of the hydraulic cylinder assembly equipment in the existing industrial field, the structure of the existing large diameter hydraulic cylinder loader is slightly changed, and the supporting mode of the supporting part is improved. The V-type iron with lower slope is used as the supporting device, the cylinder is not offset in X direction by using its own gravity and wire rope ratchet tensioner, and the center line alignment of cylinder and piston rod assembly is ensured by self-centring clamping mechanism in Y direction. The emphasis of this paper is to design the electro-hydraulic position servo adjusting device. In Z direction, the electro-hydraulic position servo control system is used to track and simulate, to select hydraulic components, to calculate the transfer function and to establish the mathematical simulation model, and to design the PID controller. In order to adjust the position of the controlled cylinder more quickly and accurately, the centerline of the cylinder and piston rod assembly to be assembled can be corrected rapidly in Z direction. In X direction, the piston rod assembly and cylinder can be assembled rapidly by the rear propulsion hydraulic system. The research of electro-hydraulic position servo control system is to take the electro-hydraulic servo valve-hydraulic cylinder drive device as the controlled object, and to establish a linear mathematical model for the time-varying, nonlinear and uncertainty of the system. The conventional PID controller is designed and the PID controller is simulated and analyzed under the condition of system damping ratio changing and disturbance adding by MATLAB7.0/SIMULINK. The static, dynamic and robust characteristics of the PID controller are verified. Finally meet the requirements of large diameter hydraulic cylinder assembly equipment. The research of large diameter hydraulic cylinder assembly equipment and electro-hydraulic position servo PID control system is of great practical significance and theoretical reference value. Improve the internal quality of products and assembly production efficiency, so as to reduce product failure rate and labor intensity, reduce after-sales service costs, improve product credibility and enhance the core competitiveness of the product in the industry.
【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH137

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