【摘要】：隨著機電控制技術(shù)的發(fā)展和計算機應用的不斷普及，數(shù)字流體元件作為一種機電一體化產(chǎn)品，有著越來越廣泛的應用前景，它的突出優(yōu)點在于能夠克服傳統(tǒng)模擬控制元件所固有的缺點，如重復誤差及滯環(huán)誤差大、抗干擾能力差等，并能在自動化、節(jié)能、編程控制、靈活性方面表現(xiàn)出其適應性及生命力，對新型數(shù)字變量軸向柱塞泵的研究就是在此條件下產(chǎn)生的。從未來發(fā)展的趨勢看，數(shù)字系統(tǒng)將會成為液壓控制系統(tǒng)的主流。 目前，數(shù)字式軸向柱塞變量泵還存在著許多問題。因此，，本課題在前人的基礎(chǔ)上，對其進行改進，提出利用單片機AT89S52控制步進電機驅(qū)動的數(shù)字式軸向柱塞變量泵。它以市場化為前提，以成本低廉的單片機為控制核心，大大降低了研究成本，便于以后中小企業(yè)的生產(chǎn)和推廣。 本文綜述了國內(nèi)外有關(guān)數(shù)字元件的研究和發(fā)展狀況；介紹了斜盤式軸向柱塞泵單片機控制的工作原理；采用單片機直接驅(qū)動步進電機的方法；建立了斜盤式軸向柱塞泵的單片機控制系統(tǒng)的數(shù)學模型，并對其進行特性分析。在MATLAB下進行了動態(tài)仿真，取得了滿意的結(jié)果，從理論上證實了斜盤式軸向柱塞泵的單片機控制系統(tǒng)工作原理是可行的。 本課題的主要內(nèi)容包括：設(shè)計了以AT89S52單片機為核心的硬件電路，主要包括步進電機的驅(qū)動電路、A/D轉(zhuǎn)換電路、鍵盤顯示電路、看門狗電路等；本課題所設(shè)計的變量調(diào)節(jié)機構(gòu)采用結(jié)構(gòu)簡單、應用方便的雙邊滑閥作為執(zhí)行機構(gòu)，大大簡化了變量機構(gòu)的結(jié)構(gòu)，提高了數(shù)字泵的性能，從而使得在一個普通模擬的軸向柱塞泵上，加裝上變量機構(gòu)和單片機系統(tǒng)，就能得到一個精確控制的數(shù)字式軸向柱塞泵變量泵。 因此，本課題所設(shè)計的變量調(diào)節(jié)機構(gòu)具有結(jié)構(gòu)簡單、控制精度高、成本低廉等特點，可以滿足市場化的需求。
[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.
【學位授予單位】：蘭州理工大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH322

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