60MN水压机电液比例控制系统仿真与实验研究

发布时间：2018-06-24 12:46

本文选题：水压机 + 主分配器　；参考：《燕山大学》2012年硕士论文

【摘要】：锻造液压机是机械制造行业中的重型机械设备，是衡量一个国家机械制造水平和国防工业实力的重要标志之一。水压机作为目前我国大型锻造设备的重要组成部分，在大型装备制造领域发挥着重要的作用，传统的水压机水控水驱动方式在控制精度和自动化水平上不能满足要求，在此背景下，油控水驱动的水压机的优越性日益突出，应用越来越广泛。针对水压机电液比例控制系统的非线性、大时变负载干扰及存在较大的参数变化等特点，利用数字仿真技术，对其动静态特性展开理论及实验研究具有重要的理论意义和实际应用价值。本文以60MN自由锻造水压机电液比例控制系统为依托，利用系统仿真软件MATLAB/Simulink完成了以下几方面的工作：第一，采用机理建模的方法对60MN自由锻造水压机电液比例控制系统的关键元件包括电液比例阀、液压动力机构、角位移传感器等进行了数学建模，并对快锻过程中主分配器阀芯启闭产生的液动力情况进行了分析。第二，采用传统PID控制理论对电液比例控制系统进行分析校正，使系统具有良好的动态响应特性，为提高系统的控制精度和对外负载干扰的鲁棒性，设计了模型参考自适应控制器，仿真结果表明，，模型参考自适应控制器具有较好的控制效果，使系统呈现一定的自适应性，是一种性能优良的控制器。第三，搭建电液比例阀控缸实验模拟平台，对电液比例控缸系统进行实验研究，对第二步所设计的PID控制器和模型参考自适应控制器进行实验验证，实验结果验证了电液比例控制系统仿真模型以及模性参考自适应控制策略的有效性。
[Abstract]:Forging hydraulic press is the heavy machinery equipment in the machinery manufacturing industry, and it is one of the important symbols to measure a country's mechanical manufacturing level and national defense industry strength. As an important part of large forging equipment in our country, hydraulic press plays an important role in the field of large-scale equipment manufacturing. The traditional water control drive method of hydraulic press can not meet the requirements in control accuracy and automation level. Under this background, the superiority of hydraulic press driven by oil control water is becoming more and more prominent and its application is more and more extensive. Aiming at the characteristics of hydraulic electrohydraulic proportional control system, such as nonlinear, large time-varying load disturbance and large parameter variation, the digital simulation technology is used. The theoretical and experimental research on its dynamic and static characteristics has important theoretical significance and practical application value. Based on the hydraulic electro-hydraulic proportional control system of 60MN free forging, this paper has completed the following work by using the system simulation software MATLAB / Simulink: first, The key components of the hydraulic electro-hydraulic proportional control system for 60MN free forging are modeled by the method of mechanism modeling, including electro-hydraulic proportional valve, hydraulic power mechanism, angle displacement sensor, etc. The hydrodynamic characteristics of the main distributor spool during rapid forging are analyzed. Secondly, the traditional pid control theory is used to analyze and correct the electro-hydraulic proportional control system, which makes the system have good dynamic response characteristics, in order to improve the control accuracy of the system and the robustness of external load disturbance. The model reference adaptive controller is designed. The simulation results show that the model reference adaptive controller has good control effect and makes the system self-adaptive. Thirdly, the experimental simulation platform of electro-hydraulic proportional valve control cylinder is built, and the experimental research on the electro-hydraulic proportional cylinder control system is carried out. The pid controller and the model reference adaptive controller designed in the second step are verified experimentally. The experimental results show that the simulation model of electro-hydraulic proportional control system and the model reference adaptive control strategy are effective.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137.7

【引证文献】