电液比例伺服综合实验台阀控液压马达动、静态特性研究

发布时间：2018-01-10 13:14

本文关键词：电液比例伺服综合实验台阀控液压马达动、静态特性研究　出处：《沈阳工业大学》2011年硕士论文　论文类型：学位论文

【摘要】：实验台设备是大学在理工类学科教学过程中不可缺少的基本设备,试验台设备的功能和作用对教学的效果和学生对理论知识的掌握程度产生很大影响。电液伺服比例综合实验是我校自主研发并调试安装的一台大型实验设备,在教学过程中,学生能够在该实验台上进行电液比例控制技术课和自动控制原理课所涉及的多种实验,是对理论教学的很好补充。该阀控液压马达系统采用闭环控制的方式,以比例换向阀作为控制元件,以液压马达为输出元件,以编码器以及多种传感器作为反馈元件,实现了对马达轴转角的闭环控制。建立了阀控液压马达转角的闭环控制系统的线性数学模型,应用MATLAB/SIMULINK计算机仿真软件对系统进行了仿真研究,计算出相关的静态特性指标(如稳态误差),分析系统的稳定性；在典型阶跃信号作用下,计算出各种动态特性指标(如上升时间、超调量、震荡次数等)。在调节系统的参数,改变系统固有频率和阻尼比的条件下,得出不同的仿真结果,并将对仿真结果进行了对比分析,以得到较为合理的控制参数。该试验台除了可以进行常规的动态响应特性、频率特性、稳定性分析、误差分析等实验之外,还可以利用此试验台进行关于控制算法及控制策略的研究。在该试验台的液压系统中,采用比例换向阀控制液压马达的方式,结构简单,而且与计算机测控技术结合,充分发挥其优势。这样,在节省成本的前提下,实现了复杂而多样的控制功能。该实验台的成功研制会给同类相关产品的开发和创新带来启示和参考,为各种试验台的设计提供了新的思路。
[Abstract]:Laboratory equipment is an indispensable basic equipment in the teaching process of science and technology. The function and function of the test-bed equipment have great influence on the teaching effect and the students' mastery of theoretical knowledge. The electro-hydraulic servo proportion comprehensive experiment is a large experimental equipment independently developed and debugged in our school. In the course of teaching, students can carry out many kinds of experiments in the course of electro-hydraulic proportional control technology and automatic control principle, which is a good supplement to the teaching of theory. The valve controlled hydraulic motor system adopts the closed loop control mode. The proportional reversing valve is used as the control element, the hydraulic motor as the output element, the encoder and a variety of sensors as the feedback elements. The closed-loop control of motor shaft angle is realized, and the linear mathematical model of the closed-loop control system of valve controlled hydraulic motor rotation angle is established. The MATLAB/SIMULINK computer simulation software is used to simulate the system, and the static characteristic index (such as steady-state error) is calculated, and the stability of the system is analyzed. Under the action of the typical step signal, various dynamic characteristic indexes (such as rise time, overshoot, oscillation times, etc.) are calculated under the condition of adjusting the parameters of the system and changing the natural frequency and damping ratio of the system. Different simulation results are obtained and the simulation results are compared and analyzed in order to obtain more reasonable control parameters. Besides the conventional dynamic response characteristics frequency characteristics and stability analysis can be carried out on the test bed. In addition to error analysis and other experiments, it can be used to study the control algorithm and control strategy. In the hydraulic system of the test bed, the proportional directional valve is used to control the hydraulic motor, the structure is simple, and combined with the computer measurement and control technology, the advantages of the hydraulic motor can be brought into full play. Thus, the cost can be saved. The successful development of the test bench will bring inspiration and reference to the development and innovation of similar related products, and provide a new way of thinking for the design of various kinds of test bed.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH137.5

【参考文献】