本安型电磁铁测试台控制系统设计

发布时间：2018-05-20 20:50

本文选题：电磁铁 + 控制　；参考：《太原理工大学》2015年硕士论文

【摘要】：本质安全型电磁铁是液压支架电磁换向阀的动力元件。这种电磁铁虽然结构简单,但由于内部磁路复杂、导磁材料非线性和温度变化等因素影响,使得其设计变得复杂困难。为促进本质安全型电磁铁的研究，急需开发一套操作方便，测量准确的测试系统。本课题受山西省科技重大专项—综采液压支架电液控制阀研发（编号：20111101025）资助，成功开发出了能测量电磁铁电流—位移—力静态特性和动态响应特性的测试台。该测试台由控制模块和数据采集模块构成，本文主要研究测试台的控制方案。本文对伺服运动滑台进行受力分析，建立数学模型，然后将模型导入到MATLAB/Simulink软件中进行时域和频域仿真分析，分析了系统的稳定性和响应特性，，并对系统进行优化校正。基于电磁铁静态特性测量，课题采用“撞击法”寻找电磁铁顶杆零点位置，使用“二分迭代法”和“点滴步进法”相互结合的滑台运动方案对力传感器变形进行补偿以实现精确控制顶杆伸出位置。实验结果表明“撞击法”寻得的顶杆零点位置误差小于0.002mm，顶杆伸出长度的控制偏差小于±0.01mm。“二分迭代法”和“点滴步进法”相互结合的滑台运动方案吸收了“二分法”在电磁铁顶杆伸出较短、电磁力变化平顺时是测量速度快的优点，弥补了顶杆伸出较长、电磁力变化剧烈时测量收敛难，用时长的缺点。使用这种方法，测试台完成一次测量需要9分钟。基于电磁铁动态响应测量，测试台采用自动移动滑台安装传感器到指定位置，其工作方式和静态测量时寻找电磁铁顶杆零点相似。
[Abstract]:Intrinsically safe electromagnet is the power element of electromagnetic directional valve in hydraulic support. Although the structure of the electromagnet is simple, it is difficult to design because of the complex internal magnetic circuit, nonlinear magnetic material and temperature change. In order to promote the research of intrinsically safe electromagnet, it is urgent to develop a set of test system which is easy to operate and accurate in measurement. The research and development of electro-hydraulic control valve for fully mechanized coal mining hydraulic support (No. 1: 20111101025) is supported by Shanxi province science and technology major project. The test bench which can measure the electromagnet current-displacement-force static characteristic and dynamic response characteristic has been developed successfully. The test bench consists of control module and data acquisition module. In this paper, the force of the servo sliding table is analyzed, the mathematical model is established, and then the model is introduced into the MATLAB/Simulink software for the time-domain and frequency-domain simulation analysis. The stability and response characteristics of the system are analyzed, and the system is optimized and corrected. Based on the measurement of the static characteristics of electromagnets, the "impact method" is used to find the zero position of the top rod of the electromagnet. The sliding table motion scheme which is combined with "dichotomous iteration method" and "drop step method" is used to compensate the deformation of the force sensor in order to accurately control the protruding position of the top rod. The experimental results show that the zero position error of the top rod is less than 0.002mm and the control deviation of the protruding length of the top rod is less than 卤0.01mm. The sliding platform motion scheme which combines "dichotomous iteration method" and "drip-step method" absorbs the advantage of "dichotomy" when the top rod of the electromagnet reaches out shorter and the electromagnetic force changes smoothly is the advantage of fast measuring speed and makes up for the longer protruding of the top rod. When the electromagnetic force changes violently, it is difficult to measure convergence, and the disadvantage of using time is long. Using this method, the test table takes 9 minutes to complete a measurement. Based on the measurement of the dynamic response of the electromagnet, the automatic moving slide platform is used to install the sensor to the specified position, and its working mode is similar to that of finding the zero point of the top rod of the electromagnet in the static measurement.
【学位授予单位】：太原理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD355.4

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