【摘要】：本論文是針對長安大學(xué)現(xiàn)有的電液比例壓力流量控制系統(tǒng)試驗(yàn)臺的二次開發(fā),在現(xiàn)有的實(shí)驗(yàn)設(shè)備下,我們已經(jīng)搭建好了電液比例泵控馬達(dá)系統(tǒng)和電液比例閥控馬達(dá)系統(tǒng),但是如何能夠在實(shí)驗(yàn)室條件下給馬達(dá)加載,并且能夠?qū)λ虞d荷進(jìn)行很好地控制,卻沒有做過專門的研究。本論文就根據(jù)實(shí)際的需要,設(shè)計和搭建了電液比例加載系統(tǒng)。 首先確定了加載的方式：利用比例溢流閥和比例節(jié)流閥通過改變二次元件出口壓力大小最終實(shí)現(xiàn)對馬達(dá)的加載。然后,利用液壓試驗(yàn)臺現(xiàn)有的元件,設(shè)計和搭建了電液比例溢流閥加載系統(tǒng)和電液比例節(jié)流閥加載系統(tǒng),并對加載系統(tǒng)的核心元件—比例閥的結(jié)構(gòu)和工作原理做了詳細(xì)的分析。隨后又對這兩個系統(tǒng)的加載原理和適用的情況做了分析。 針對所設(shè)計的比例加載系統(tǒng),建立了它們的數(shù)學(xué)模型,然后分析得出系統(tǒng)的動態(tài)品質(zhì)和穩(wěn)態(tài)特性還不能滿足實(shí)際加載的需要,于是提出了模糊PID控制策略。利用現(xiàn)有實(shí)驗(yàn)資料,并通過MATLAB軟件繪制出了比例加載系統(tǒng)的電壓—扭矩關(guān)系曲線,然后,利用simulink軟件對系統(tǒng)進(jìn)行動態(tài)仿真,通過分析仿真結(jié)果,得出模糊PID控制作為電液比例加載系統(tǒng)的控制方法是良好的。
[Abstract]:This paper is aimed at the secondary development of the current electro-hydraulic proportional pressure flow control system test-bed in Chang'an University. Under the existing experimental equipment, we have built the electro-hydraulic proportional pump control motor system and the electro-hydraulic proportional valve control motor system. However, how to load the motor in laboratory and how to control the load well have not been studied. In this paper, the electro-hydraulic proportional loading system is designed and built according to the actual needs. First, the loading mode is determined: the motor is finally loaded by changing the outlet pressure of the secondary components by using the proportional relief valve and the proportional throttle valve. Then, the loading system of electro-hydraulic proportional relief valve and the loading system of electro-hydraulic proportional throttle valve are designed and built by using the existing components of the hydraulic test-bed. The structure and working principle of the core component of the loading system, the proportional valve, are analyzed in detail. Then the loading principle and application of the two systems are analyzed. In view of the designed proportional loading system, their mathematical models are established. Then the dynamic quality and steady-state characteristics of the system can not meet the demand of actual loading, so a fuzzy PID control strategy is put forward. The voltage-torque curve of the proportional loading system is drawn by using the available experimental data and MATLAB software. Then, the dynamic simulation of the system is carried out by using simulink software, and the simulation results are analyzed. It is concluded that fuzzy PID control is a good control method for electro-hydraulic proportional loading system.
【學(xué)位授予單位】：長安大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2011
【分類號】：TH137.9

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本文編號：2463825