基于虚拟仪器的液压动力系统功率监测及系统控制研究

发布时间：2018-03-06 23:03

本文选题：功率监测　切入点：虚拟仪器　出处：《长安大学》2011年硕士论文　论文类型：学位论文

【摘要】：在国家“十二五”规划建设资源节约型、环境友好型社会的背景下,本文以液压设备节能研究为目的,针对原有液压动力系统实验台在节能研究中存在的问题,提出了基于虚拟仪器的液压动力系统功率监测与节能控制实验系统设计,并对测试与控制装置进行了改进。改进后的实验系统可以实现液压设备典型负载的模拟、电机无级调速、流量自适应控制等操作,同时在线监测系统的电机功率、功率因数、流体功率及系统效率等参数。论文的主要研究内容概括如下： 1.根据电机空间矢量PWM控制原理和齿轮泵数学模型,结合Matlab/simulink软件分别搭建了基于异步电机/永磁同步电机——齿轮泵的液压动力源模型,并对两种动力源的仿真结果进行了对比分析。 2.针对传统液压动力系统在节能研究中的不足,提出了基于虚拟仪器的液压动力系统功率监测与系统控制的设计方案。其次,对虚拟仪器软硬件平台及传感器做了详细的介绍,并对压力传感器和流量传感器进行了标定。 3.采用Labview图形化编程语言和模块化程序设计思想,编写了液压动力系统功率监测及系统控制上位机软件。通过实验验证,实现了液压动力系统的模拟加载、电机调速、流量自适应控制及功率监测等功能。 4.运用本实验系统,对节流调速/变频调速液压系统、异步电机/永磁同步电机液压动力系统进行了能耗对比分析。实验结果表明：将变频调速技术和永磁同步电机引入液压动力系统能显著提高液压动力系统的效率,且具有良好的动态性能。
[Abstract]:Under the background of national "12th Five-Year Plan" planning and construction of resource-conserving and environment-friendly society, the purpose of this paper is to study the energy conservation of hydraulic equipment, aiming at the problems existing in the energy conservation research of the original hydraulic power system experiment bench. An experimental system for power monitoring and energy saving control of hydraulic power system based on virtual instrument is proposed, and the test and control device is improved. The improved experimental system can simulate the typical load of hydraulic equipment. Motor stepless speed regulation, flow adaptive control, and on-line monitoring system parameters such as motor power, power factor, fluid power and system efficiency. The main contents of this paper are summarized as follows:. 1. According to the control principle of space vector PWM and the mathematical model of gear pump, the hydraulic power source model based on asynchronous motor / permanent magnet synchronous motor-gear pump is built based on Matlab/simulink software. The simulation results of the two power sources are compared and analyzed. 2. Aiming at the deficiency of traditional hydraulic power system in the research of energy saving, the design scheme of power monitoring and system control of hydraulic power system based on virtual instrument is put forward. Secondly, the hardware and software platform and sensor of virtual instrument are introduced in detail. The pressure sensor and flow sensor are calibrated. 3.Using Labview graphic programming language and modularization programming thought, the software of power monitoring and system control of hydraulic power system is compiled. The simulation loading and motor speed regulation of hydraulic power system are realized by experiment. Flow adaptive control and power monitoring and other functions. 4.Using this experimental system, the hydraulic system of throttling speed regulation and variable frequency speed regulation is applied. The energy consumption of hydraulic power system of asynchronous motor and permanent magnet synchronous motor is compared and analyzed. The experimental results show that the efficiency of hydraulic power system can be greatly improved by introducing frequency conversion speed regulation technology and permanent magnet synchronous motor into hydraulic power system. And has good dynamic performance.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH137

【引证文献】