【作者】 杨小乐；

【导师】 张元良；

【作者基本信息】 大连理工大学 ， 精密仪器与机械， 2009， 硕士

【摘要】 电液控制作为液压控制的一个新分支,因为其本身的特点正得到越来越广泛的应用。电液控制系统的发展对电液控制技术提出了更高的要求,这必将促进电液控制技术的发展。本文在教研室多年电液控制经验的基础上,提出开发通用型电液系统数字控制器。通过对电液控制技术的研究,了解电液系统的一般构成,结合多个具体实例,本文提出数字式电液控制器概念,以ARM微处理器为硬件核心,采用多种智能控制算法解决电液系统闭环控制问题。数字控制器以PHILIPS公司的32位ARM7微处理器LPC2292为硬件核心,配有高速AD、DA转换器。硬件设计注重通用性,具有多种输入、输出通道,可以采集和输出多种、多个模拟量信号和数字量信。具有多种通信接口,可以实现近距离监控或者远距离操控。人机交互通道丰富,具有报警、状态指示、参数显示等功能。采用光电隔离、独立电源、屏蔽外壳等措施保证控制器具有良好的稳定性、可靠性。软件设计采用UC/OS-Ⅱ嵌入式操作系统,内部集成多种智能控制算法,保证电液系统闭环控制取得良好的效果。开发模拟试验系统,可以模拟电液系统现场的各种信号和闭环回路,实现实验室调试。采用Visual Basic开发上位机软件,配合控制器完成参数修改、保存,绘制实时监控曲线,控制硬件等功能。控制器解决了电液系统多样性难题,客服模拟控制的缺点。研发出模糊自整定PID算法,它成功解决了闭环控制过程中设定信号不断变化的难题。经过多次现场调试,目前控制器已经成功应用于国内多家企业的轮胎耐久性试验机和密炼机两种电液系统,在这两种系统中成功取代进口国外模拟控制器,并且控制效果好于国外模拟控制器。更多还原

【Abstract】 Electro-hydraulic control which is a new branch of hydraulic control is being increasingly widely used because of its own characters. The development of electro-hydraulic control system makes higher requirements to electro-hydraulic control technology that will certainly promote development of electro-hydraulic control technology. This paper proposes to research general electro-hydraulic digital controller on the basis of staff room’ many years of electro-hydraulic control experience.This paper proposes the concept of digital controller, through combining with a number of specific examples and researching electro-hydraulic system composition and its control technology. Controller uses ARM microprocessor as hardware core and uses many intelligent control algorithms to solve the problem of closed-loop control of electro-hydraulic system.Digital controller uses PHILIPS Company’s 32-bit ARM7 microprocessor LPC2292 as hardware core, with high speed AD and DA converters. Hardware design focus on generality, with rich input and output channels, it can capture and output various and multiple analog signals and digital signals. With multiple communication interfaces, it can achieve close range or remote control. It can achieve alarm, status indication, parameters display with many human-computer interaction Channels. With photoelectric isolation and independent power supply and shielding shell and other measures controller has good stability and reliability. Software uses embedded operating system UC/OS-Ⅱ, internal integrates multiple intelligent algorithms to ensure that closed-loop control can have good result. Developing simulation test box to simulate on-field electro-hydraulic system signals and closed-loop system, it can achieve lab debug. Controller uses Visual Basic to develop host computer software which combines with controller to complete parameters modification and saving, real-time control curve drawing and hardware control.Controller has solved diversity problem and analog control defect, developed fuzzy self adjust PID algorithm which successfully solves problem of setting signal constantly changes during close-loop control process. With many times on field debug controller has been successfully applied in both tire endurance of testing machine and internal mixer electro-hydraulic systems, replaced import analog controller with better control effect.更多还原