本文關(guān)鍵詞：電液比例伺服綜合實驗臺閥控液壓馬達動、靜態(tài)特性研究　出處：《沈陽工業(yè)大學》2011年碩士論文　論文類型：學位論文

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【摘要】：實驗臺設(shè)備是大學在理工類學科教學過程中不可缺少的基本設(shè)備,試驗臺設(shè)備的功能和作用對教學的效果和學生對理論知識的掌握程度產(chǎn)生很大影響。電液伺服比例綜合實驗是我校自主研發(fā)并調(diào)試安裝的一臺大型實驗設(shè)備,在教學過程中,學生能夠在該實驗臺上進行電液比例控制技術(shù)課和自動控制原理課所涉及的多種實驗,是對理論教學的很好補充。 該閥控液壓馬達系統(tǒng)采用閉環(huán)控制的方式,以比例換向閥作為控制元件,以液壓馬達為輸出元件,以編碼器以及多種傳感器作為反饋元件,實現(xiàn)了對馬達軸轉(zhuǎn)角的閉環(huán)控制。建立了閥控液壓馬達轉(zhuǎn)角的閉環(huán)控制系統(tǒng)的線性數(shù)學模型,應用MATLAB/SIMULINK計算機仿真軟件對系統(tǒng)進行了仿真研究,計算出相關(guān)的靜態(tài)特性指標(如穩(wěn)態(tài)誤差),分析系統(tǒng)的穩(wěn)定性；在典型階躍信號作用下,計算出各種動態(tài)特性指標(如上升時間、超調(diào)量、震蕩次數(shù)等)。在調(diào)節(jié)系統(tǒng)的參數(shù),改變系統(tǒng)固有頻率和阻尼比的條件下,得出不同的仿真結(jié)果,并將對仿真結(jié)果進行了對比分析,以得到較為合理的控制參數(shù)。該試驗臺除了可以進行常規(guī)的動態(tài)響應特性、頻率特性、穩(wěn)定性分析、誤差分析等實驗之外,還可以利用此試驗臺進行關(guān)于控制算法及控制策略的研究。 在該試驗臺的液壓系統(tǒng)中,采用比例換向閥控制液壓馬達的方式,結(jié)構(gòu)簡單,而且與計算機測控技術(shù)結(jié)合,充分發(fā)揮其優(yōu)勢。這樣,在節(jié)省成本的前提下,實現(xiàn)了復雜而多樣的控制功能。該實驗臺的成功研制會給同類相關(guān)產(chǎn)品的開發(fā)和創(chuàng)新帶來啟示和參考,為各種試驗臺的設(shè)計提供了新的思路。
[Abstract]:Laboratory equipment is an indispensable basic equipment in the teaching process of science and technology. The function and function of the test-bed equipment have great influence on the teaching effect and the students' mastery of theoretical knowledge. The electro-hydraulic servo proportion comprehensive experiment is a large experimental equipment independently developed and debugged in our school. In the course of teaching, students can carry out many kinds of experiments in the course of electro-hydraulic proportional control technology and automatic control principle, which is a good supplement to the teaching of theory. The valve controlled hydraulic motor system adopts the closed loop control mode. The proportional reversing valve is used as the control element, the hydraulic motor as the output element, the encoder and a variety of sensors as the feedback elements. The closed-loop control of motor shaft angle is realized, and the linear mathematical model of the closed-loop control system of valve controlled hydraulic motor rotation angle is established. The MATLAB/SIMULINK computer simulation software is used to simulate the system, and the static characteristic index (such as steady-state error) is calculated, and the stability of the system is analyzed. Under the action of the typical step signal, various dynamic characteristic indexes (such as rise time, overshoot, oscillation times, etc.) are calculated under the condition of adjusting the parameters of the system and changing the natural frequency and damping ratio of the system. Different simulation results are obtained and the simulation results are compared and analyzed in order to obtain more reasonable control parameters. Besides the conventional dynamic response characteristics frequency characteristics and stability analysis can be carried out on the test bed. In addition to error analysis and other experiments, it can be used to study the control algorithm and control strategy. In the hydraulic system of the test bed, the proportional directional valve is used to control the hydraulic motor, the structure is simple, and combined with the computer measurement and control technology, the advantages of the hydraulic motor can be brought into full play. Thus, the cost can be saved. The successful development of the test bench will bring inspiration and reference to the development and innovation of similar related products, and provide a new way of thinking for the design of various kinds of test bed.
【學位授予單位】：沈陽工業(yè)大學
【學位級別】：碩士
【學位授予年份】：2011
【分類號】：TH137.5

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