發(fā)布時(shí)間：2018-07-27 12:51

【摘要】：隨著裝備制造水平的提高,室內(nèi)模擬加載系統(tǒng)在設(shè)備性能測(cè)試實(shí)驗(yàn)中得到了廣泛的應(yīng)用,因此室內(nèi)模擬加載裝置在機(jī)電液系統(tǒng)中如何準(zhǔn)確模擬實(shí)際工況是當(dāng)前研究熱點(diǎn)。室內(nèi)模擬加載系統(tǒng)性能與負(fù)載裝置特性緊密相關(guān),負(fù)載裝置性能影響模擬載荷的精確度,使用不同加載裝置模擬液壓設(shè)備在實(shí)際工況下所承受的載荷譜并進(jìn)行相關(guān)實(shí)(試)驗(yàn)方法研究是焦點(diǎn)問(wèn)題。本文將電磁比例溢流閥和磁粉制動(dòng)器兩種加載元件運(yùn)用到泵控馬達(dá)液壓系統(tǒng)中,對(duì)加載元件模擬加載性能研究。對(duì)比兩種加載元件分別加載時(shí)系統(tǒng)的靜態(tài)響應(yīng)特性和動(dòng)態(tài)響應(yīng)特性:在加載方式、適用范圍、負(fù)載特性等方面進(jìn)行綜合比較,為在實(shí)驗(yàn)室條件下選擇合適的加載元件提供參考依據(jù)。本文完成的主要研究工作如下:(1)通過(guò)MATLAB(SIMULINK)軟件搭建主要液壓元件模型,并根據(jù)電磁比例溢流閥和磁粉制動(dòng)器工作原理搭建兩種加載元件數(shù)學(xué)模型。仿真研究?jī)煞N不同加載元件在相同負(fù)載工況條件下的工作機(jī)理,研究各關(guān)鍵因素對(duì)加載性能特點(diǎn)的影響機(jī)制原理;(2)對(duì)變轉(zhuǎn)速泵控馬達(dá)系統(tǒng)利用上位工控機(jī)完成了軟件設(shè)計(jì),利用電磁比例溢流閥和磁粉制動(dòng)器加載元件對(duì)系統(tǒng)壓力在相同工況條件下開(kāi)環(huán)加載:通過(guò)系統(tǒng)壓力測(cè)試,分析兩種加載元件的加載控制電壓死區(qū)大小、最大滯后誤差大小、靈敏度等靜態(tài)特性;(3)在泵控馬達(dá)系統(tǒng)中利用PID控制調(diào)節(jié)原理完成系統(tǒng)壓力閉環(huán)加載,通過(guò)對(duì)比分析得出:兩種加載元件進(jìn)行壓力閉環(huán)加載時(shí)均能消除壓力開(kāi)環(huán)加載時(shí)出現(xiàn)的穩(wěn)態(tài)誤差現(xiàn)象。利用兩種加載元件實(shí)現(xiàn)系統(tǒng)壓力開(kāi)環(huán)加載和閉環(huán)加載時(shí)能夠分析比較兩種加載元件加載時(shí)響應(yīng)快速性、準(zhǔn)確性、穩(wěn)定性。(4)利用兩種加載元件進(jìn)行系統(tǒng)壓力加載時(shí),通過(guò)在馬達(dá)軸上添加三種不同規(guī)格慣量盤(pán)改變負(fù)載慣量并在相同工況下采集、分析比較馬達(dá)轉(zhuǎn)速,研究不同加載元件模擬加載時(shí)負(fù)載轉(zhuǎn)動(dòng)慣量大小對(duì)馬達(dá)轉(zhuǎn)速波動(dòng)影響。
[Abstract]:With the improvement of equipment manufacturing level, indoor simulated loading system has been widely used in equipment performance test, so how to accurately simulate the actual working conditions of indoor analog loading device in electromechanical and hydraulic system is a hot research topic at present. The performance of the indoor analog loading system is closely related to the characteristics of the load device, and the performance of the load device affects the accuracy of the simulated load. Using different loading devices to simulate the load spectrum of hydraulic equipment under actual working conditions and to study the relevant real (trial) test methods are the focus issues. In this paper, the electromagnetic proportional relief valve and magnetic powder brake are applied to the hydraulic system of pump controlled motor, and the simulated loading performance of the loading elements is studied. The static response characteristics and dynamic response characteristics of the two loading elements are compared: loading mode, applicable range, load characteristic and so on. It provides a reference for selecting suitable loading elements under laboratory conditions. The main work of this paper is as follows: (1) the main hydraulic component model is built by MATLAB (SIMULINK) software, and two kinds of loading element mathematical models are built according to the working principle of electromagnetic proportional relief valve and magnetic powder brake. The working mechanism of two kinds of different loading components under the same load condition is studied by simulation, and the influence mechanism of each key factor on the loading characteristics is studied. (2) the software design of the pump motor system with variable speed is completed by using the upper industrial control computer. The electromagnetic proportional relief valve and magnetic powder brake are used to load the pressure of the system under the same operating conditions. Through the pressure test of the system, the size of the dead-zone voltage and the maximum lag error of the two loading elements are analyzed. Sensitivity and other static characteristics. (3) the pressure closed-loop loading of the system is completed by using the PID control regulation principle in the pump control motor system. Through comparison and analysis, it is concluded that the steady-state error of pressure open-loop loading can be eliminated when two kinds of loading elements are loaded in closed loop. When two kinds of loading elements are used to realize the pressure open-loop loading and closed-loop loading, the response speed, accuracy and stability of the two loading elements can be analyzed and compared. (4) when the two loading elements are used for the pressure loading of the system, By adding three kinds of inertia plates with different specifications to the motor shaft to change the load inertia and collect it under the same working condition, the motor rotational speed was analyzed and compared, and the effect of load moment of inertia on the motor speed fluctuation was studied.
【學(xué)位授予單位】：長(zhǎng)安大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TH137

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本文編號(hào)：2147890