斜盘式轴向柱塞泵的单片机控制研究

发布时间：2018-12-16 12:16

【摘要】：随着机电控制技术的发展和计算机应用的不断普及，数字流体元件作为一种机电一体化产品，有着越来越广泛的应用前景，它的突出优点在于能够克服传统模拟控制元件所固有的缺点，如重复误差及滞环误差大、抗干扰能力差等，并能在自动化、节能、编程控制、灵活性方面表现出其适应性及生命力，对新型数字变量轴向柱塞泵的研究就是在此条件下产生的。从未来发展的趋势看，数字系统将会成为液压控制系统的主流。目前，数字式轴向柱塞变量泵还存在着许多问题。因此，，本课题在前人的基础上，对其进行改进，提出利用单片机AT89S52控制步进电机驱动的数字式轴向柱塞变量泵。它以市场化为前提，以成本低廉的单片机为控制核心，大大降低了研究成本，便于以后中小企业的生产和推广。本文综述了国内外有关数字元件的研究和发展状况；介绍了斜盘式轴向柱塞泵单片机控制的工作原理；采用单片机直接驱动步进电机的方法；建立了斜盘式轴向柱塞泵的单片机控制系统的数学模型，并对其进行特性分析。在MATLAB下进行了动态仿真，取得了满意的结果，从理论上证实了斜盘式轴向柱塞泵的单片机控制系统工作原理是可行的。本课题的主要内容包括：设计了以AT89S52单片机为核心的硬件电路，主要包括步进电机的驱动电路、A/D转换电路、键盘显示电路、看门狗电路等；本课题所设计的变量调节机构采用结构简单、应用方便的双边滑阀作为执行机构，大大简化了变量机构的结构，提高了数字泵的性能，从而使得在一个普通模拟的轴向柱塞泵上，加装上变量机构和单片机系统，就能得到一个精确控制的数字式轴向柱塞泵变量泵。因此，本课题所设计的变量调节机构具有结构简单、控制精度高、成本低廉等特点，可以满足市场化的需求。
[Abstract]:With the development of electromechanical control technology and the popularization of computer application, digital fluid components, as a kind of mechatronics product, have more and more extensive application prospects. Its outstanding advantage lies in its ability to overcome the inherent shortcomings of traditional analog control elements, such as large repetition error and hysteresis error, poor anti-interference ability, etc., and can be used in automation, energy saving, programming control, etc. Flexibility shows its adaptability and vitality. The research of new digital variable axial piston pump is produced under this condition. From the trend of future development, digital system will become the mainstream of hydraulic control system. At present, there are still many problems in digital axial piston variable pump. Therefore, on the basis of the previous research, this paper proposes a digital axial plunger variable pump driven by stepping motor by using AT89S52 of single chip computer. It takes the market as the premise and the low cost single chip microcomputer as the control core, which greatly reduces the research cost and facilitates the production and promotion of small and medium-sized enterprises in the future. This paper summarizes the research and development of digital components at home and abroad, introduces the working principle of single-chip microcomputer control of oblique disc axial piston pump, and introduces the method of using single-chip microcomputer to drive stepping motor directly. The mathematical model of single-chip microcomputer control system of inclined disc axial piston pump is established and its characteristic is analyzed. The dynamic simulation is carried out under MATLAB, and the satisfactory results are obtained. The working principle of the single-chip microcomputer control system of the inclined disc axial piston pump is proved to be feasible theoretically. The main contents of this thesis are as follows: the hardware circuit based on AT89S52 single chip microcomputer is designed, which includes the driving circuit of step motor, the conversion circuit of Ar / D, the circuit of keyboard display, the circuit of watchdog and so on. The variable adjusting mechanism designed in this paper adopts simple structure and convenient two-sided slide valve as actuating mechanism, which greatly simplifies the structure of variable mechanism and improves the performance of digital pump. Thus, a precisely controlled digital axial piston pump can be obtained by adding a variable mechanism and a single chip microcomputer system to a common analog axial piston pump. Therefore, the variable regulation mechanism designed in this paper has the characteristics of simple structure, high control precision and low cost, which can meet the needs of market economy.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH322

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