本文關(guān)鍵詞：重載靜動(dòng)態(tài)電液測(cè)力建模與實(shí)驗(yàn)研究　出處：《燕山大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 電液測(cè)力 重載 測(cè)量精度 摩擦泄漏 標(biāo)定

【摘要】：電液測(cè)力系統(tǒng)可用于感知重載大量程力的信息,在重載測(cè)力領(lǐng)域具有重要的應(yīng)用價(jià)值。本文為提高電液測(cè)力系統(tǒng)的測(cè)量精度,對(duì)其系統(tǒng)中核心執(zhí)行元件液壓缸的摩擦與泄漏模型進(jìn)行了研究與分析,基于有限元軟件進(jìn)行了仿真驗(yàn)證,最后搭建了電液測(cè)力實(shí)驗(yàn)系統(tǒng),開(kāi)展了系統(tǒng)的實(shí)驗(yàn)研究。主要內(nèi)容如下:首先,基于彈塑性變形理論對(duì)電液測(cè)力系統(tǒng)中執(zhí)行元件液壓缸的摩擦進(jìn)行了分析,得到了接觸摩擦模型;基于流體動(dòng)力學(xué)理論對(duì)液壓缸的泄漏切向力進(jìn)行分析,得到泄漏切向力模型;分析了基于Lu Gre摩擦模型的液壓缸等效摩擦力表述方法,并進(jìn)行了參數(shù)辨識(shí)及數(shù)值算例分析。其次,用有限元軟件Ansys對(duì)液壓缸密封圈與缸內(nèi)壁的接觸摩擦力進(jìn)行了仿真,用Fluent對(duì)液壓缸內(nèi)泄漏的流場(chǎng)分布進(jìn)行了仿真,用Matlab/Simulink對(duì)Lu Gre摩擦的動(dòng)態(tài)響應(yīng)進(jìn)行了仿真分析,分別驗(yàn)證了理論建模分析的正確性。最后,搭建電液測(cè)力實(shí)驗(yàn)系統(tǒng),將電液測(cè)力實(shí)驗(yàn)狀態(tài)分為主動(dòng)靜態(tài)測(cè)力、被動(dòng)靜態(tài)測(cè)力、主動(dòng)動(dòng)態(tài)測(cè)力及與被動(dòng)動(dòng)態(tài)測(cè)力等四種狀態(tài),從油液推力與負(fù)載的關(guān)系及油液推力與負(fù)載的差值與油液壓力的關(guān)系兩種角度探究基于電液系統(tǒng)的油液壓力求得其負(fù)載的方法,進(jìn)而得到對(duì)應(yīng)的測(cè)量精度。對(duì)于前者,用基于最小二乘的線(xiàn)性擬合法探究了油液推力與負(fù)載的關(guān)系;對(duì)于后者,將摩擦泄漏總阻力與Lu Gre摩擦模型分別等效為差值進(jìn)行補(bǔ)償處理與分析,分別得到對(duì)應(yīng)的測(cè)量精度。
[Abstract]:The electro-hydraulic force measurement system can be used to perceive the information of heavy load of heavy load, and it has important application value in the field of heavy load measurement. In order to improve the measurement accuracy of electro-hydraulic force measuring system, the system core executive friction element of hydraulic cylinder is studied and analyzed with the leakage model, based on the finite element software simulation, finally build electro-hydraulic force measurement system, experiment system. The main contents are as follows: firstly, the theory of elastic-plastic deformation of friction force measuring system of electro-hydraulic actuator hydraulic cylinders are analyzed based on the contact friction model; fluid dynamics theory of leakage of hydraulic cylinder were analyzed based on the cutting force, tangential force obtained leakage model; analyzed the expression method of Lu Gre the friction model of hydraulic cylinder based on equivalent friction, and the parameter identification and numerical analysis. Secondly, contact friction force between the sealing ring and the cylinder wall of the hydraulic cylinder with finite element software Ansys simulated the flow field distribution of leakage on the hydraulic cylinder with Fluent is simulated with Matlab/Simulink Lu Gre on dynamic friction response were simulated and analyzed respectively to verify the correctness of theoretical modeling analysis. Finally, build electro-hydraulic force measurement system, the electro-hydraulic force measuring experiment state is divided into active and passive static force static force, dynamic force and active and passive dynamic force of four kinds of state relations from the oil and the relationship between the thrust and the load of oil and oil thrust difference and hydraulic load the two point of view to explore the oil pressure of the electro-hydraulic system is obtained based on the method of load, and then obtain the corresponding measurement accuracy. For the former, the relationship between oil thrust and load is investigated based on the linear fitting method based on least squares. For the latter, the total resistance of friction leakage and the Lu Gre friction model are equivalent to the difference respectively, and the corresponding measurement accuracy is obtained respectively.
【學(xué)位授予單位】：燕山大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TP212;TH137

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