矿用液压提升机电液比例系统的研究

发布时间：2018-03-22 10:16

本文选题：液压提升机　切入点：建模　出处：《贵州大学》2016年硕士论文　论文类型：学位论文

【摘要】：液压提升机是利用液压马达直接或通过变速器带动提升滚筒,从而实现重物或人员提升的机器,其基本工况为重物的减速提升(下放)、加速提升(下放)、匀速提升(下放)、正常制动及紧急制动。液压提升机液压系统具有非线性、惯量大、时滞性等显著特点。液压提升机主要存在以下问题有待进一步改善:液压提升机驱动系统和制动系统之间的协同性问题;液压马达的运动精度对液压提升机平层精度的考验,即液压提升机速度控制系统的控制性能,液压提升机的乘坐舒适性不佳及在线故障检测系统缺失或陈旧等。本文主要针对液压提升机驱动系统和制动系统工作的协同性及液压驱动系统控制性能展开研究。在本文的第一章简述了液压提升机组成和作用,然后查阅并回顾了液压提升机的国内外发展历程,对液压提升机当前需进一步解决的问题进行总结,并论证了本文选题的必要性,提出其电液比例改造的意义,最后部分总结并展望研究的内容。第二章先详述了传统液压提升机液压系统的结构及工作原理,然后在此基础上对其进行电液比例系统的改造。其中包含主回路建模,主回路为泵控马达的容积调速回路;变量机构液压回路建模,引入独立负载口技术,对液压缸进行控制;制动回路建模,用调速阀替换原系统的节流阀,从而实现对制动油缸的制动速度进行精确调节;在此基础上,第四章基于AMESim软件建立液压提升机的驱动系统和制动系统的系统模型,并仿真分析其协同性工作的影响因素。第五章基于Matlab/SIMlink软件建立驱动系统的速度控制回路的控制图,利用PID及模糊PID对驱动系统进行建模,运行仿真,对比PID修正及模糊PID修正后的结果。
[Abstract]:A hydraulic hoist is a machine that uses a hydraulic motor to drive the lifting drum directly or through a transmission, thereby realizing the lifting of a heavy object or a person. Its basic working condition is the deceleration hoisting of the heavy object (lowering the hoist, the accelerating hoisting, the uniform speed hoisting, the normal braking and the emergency braking.) the hydraulic system of the hydraulic hoist is nonlinear, and the inertia is large. The main problems of hydraulic hoist need to be further improved: the synergy between the driving system and braking system of hydraulic hoist, the test of motion accuracy of hydraulic motor to the leveling accuracy of hydraulic hoist, That is, the control performance of the speed control system of hydraulic hoist, The ride comfort of hydraulic hoist is not good and the on-line fault detection system is missing or obsolete. This paper mainly focuses on the collaborative work between the driving system and braking system of hydraulic hoist and the control performance of hydraulic drive system. In the first chapter of this paper, the composition and function of hydraulic hoist are briefly described. Then, the development history of hydraulic hoist at home and abroad is reviewed, the problems that need to be solved further are summarized, and the necessity of selecting the topic in this paper is demonstrated, and the significance of its electro-hydraulic proportional transformation is put forward. In the second chapter, the structure and working principle of the hydraulic system of the traditional hydraulic hoist are described in detail, and then the electro-hydraulic proportional system is reformed on this basis, which includes the modeling of the main circuit. The main circuit is the volumetric speed regulating circuit of the pump control motor, the hydraulic circuit of variable mechanism is modeled, the independent load port technology is introduced to control the hydraulic cylinder, the brake circuit is modeled and the throttle valve of the original system is replaced with the speed regulating valve, On this basis, based on the AMESim software, the system model of the driving system and braking system of hydraulic hoist is established. In chapter 5, based on Matlab/SIMlink software, the control diagram of the speed control loop of the drive system is established, and the driving system is modeled by PID and fuzzy PID. The results of PID correction and fuzzy PID correction are compared.
【学位授予单位】：贵州大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TD633

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