本文關(guān)鍵詞：液壓機(jī)械無(wú)級(jí)變速器的段內(nèi)控制策略研究　出處：《吉林大學(xué)》2011年碩士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： HMCVT 功率循環(huán) 效率 鍵合圖 控制仿真

【摘要】：工程車(chē)輛具有工況復(fù)雜,作業(yè)對(duì)象多變等特點(diǎn),經(jīng)常在變載荷情況下工作。這不僅要求車(chē)輛具有較高可靠性和適應(yīng)能力,同時(shí)也大大增加了操作難度。另外,隨著能源危機(jī)、環(huán)境污染等問(wèn)題日益嚴(yán)重,工程機(jī)械行業(yè)也面臨著嚴(yán)峻的節(jié)能減排義務(wù)和責(zé)任。因此,實(shí)現(xiàn)無(wú)級(jí)變速對(duì)于提高工程車(chē)輛的動(dòng)力性和經(jīng)濟(jì)性、減輕駕駛員勞動(dòng)強(qiáng)度都有重要的意義。 液壓機(jī)械無(wú)級(jí)變速器(Hydro-Mechanical Continuously Variable Transmission,簡(jiǎn)稱(chēng)HMCVT)液壓機(jī)械無(wú)級(jí)傳動(dòng)綜合了液壓傳動(dòng)的無(wú)級(jí)、柔性的特點(diǎn)和機(jī)械傳動(dòng)效率高的特點(diǎn),在大功率拖拉機(jī)、工程車(chē)輛、坦克等許多領(lǐng)域有著良好的應(yīng)用前景。 本文對(duì)液壓機(jī)械無(wú)級(jí)變速器的原理組成進(jìn)行了分析,研究了液壓機(jī)械無(wú)級(jí)變速器的速度特性、轉(zhuǎn)矩特性、效率特性,為效率的分析和仿真模型的建立打下理論基礎(chǔ)。文章采用解析法和鍵合圖動(dòng)態(tài)分析法對(duì)HMCVT的輸入、輸出功率和液壓系統(tǒng)傳遞的功率的大小和方向進(jìn)行了分析,證明HMCVT在每一段中都存在功率循環(huán),并分別用兩種方法對(duì)液壓系統(tǒng)的效率和HMCVT的效率進(jìn)行了分析,相互驗(yàn)證。 對(duì)等比式液壓機(jī)械無(wú)級(jí)變速器與ZL50裝載機(jī)的匹配性進(jìn)行了驗(yàn)證,分析了車(chē)輛的動(dòng)力性。建立了發(fā)動(dòng)機(jī)的穩(wěn)態(tài)和動(dòng)態(tài)數(shù)學(xué)模型。并根據(jù)以上分析,制定出以發(fā)動(dòng)機(jī)最佳動(dòng)力性和液壓機(jī)械無(wú)級(jí)變速器工作在高效區(qū)為控制目標(biāo)的段內(nèi)控制策略。 應(yīng)用MATIAB/M-File、MATIAB/Simulink和RecurDyn動(dòng)力學(xué)仿真模型建立ZL50裝載機(jī)的整車(chē)仿真模型,其中包括發(fā)動(dòng)機(jī)模型、HMCVT模型、控制器、車(chē)輛和負(fù)載模塊等。使用仿真模型進(jìn)行控制仿真,證實(shí)了該控制方法可以使發(fā)動(dòng)機(jī)穩(wěn)定在目標(biāo)工作點(diǎn),且使HMCVT工作在高效區(qū),達(dá)到了控制目的。
[Abstract]:The engineering vehicle has the characteristics of complex working condition , changeable operation object and the like , and is often operated under the condition of variable load , which not only requires the vehicle to have higher reliability and adaptability , but also greatly increases the operation difficulty . Hydro - mechanical stepless transmission ( HMCVT ) hydraulic mechanical stepless transmission integrates the stepless , flexible characteristics of hydraulic transmission and the high efficiency of mechanical transmission , and has good application prospect in many fields , such as high - power tractor , engineering vehicle , tank and so on . In this paper , the principle components of hydraulic machinery stepless speed changer are analyzed , the speed characteristic , torque characteristic and efficiency characteristic of hydraulic machinery stepless speed changer are analyzed , and the theoretical foundation is laid for the analysis of efficiency and the establishment of simulation model . The analysis of the input , output power and power transmitted by hydraulic system is carried out by means of analytical method and bond graph dynamic analysis method . The efficiency of the hydraulic system and the efficiency of the HMCVT are analyzed by two methods , and the efficiency of the hydraulic system and the efficiency of the HMCVT are analyzed . The matching between equal - ratio hydraulic mechanical stepless speed changer and ZL50 loader is verified , and the dynamic characteristics of the vehicle are analyzed . The steady state and dynamic mathematical models of the engine are established . According to the above analysis , the control strategy for controlling the optimal power of the engine and the continuously variable transmission of the hydraulic machinery in the high - efficiency zone as the control target is worked out . The simulation model of ZL50 loader is established by using the simulation model of the dynamic simulation model , which includes the engine model , the HMCVT model , the controller , the vehicle , the load module , etc . The simulation model is used to control the simulation , and the control method can be used to stabilize the engine at the target working point , and the HMCVT can be operated in the high - efficiency area , and the control purpose is achieved .

【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2011
【分類(lèi)號(hào)】：TH132.46

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前3條

1 張旭燕;油液特性對(duì)液壓機(jī)械無(wú)級(jí)傳動(dòng)換段性能的影響研究[D];燕山大學(xué);2012年

2 賀會(huì)超;液壓機(jī)械無(wú)級(jí)變速技術(shù)在玉米收獲機(jī)中的應(yīng)用研究[D];吉林大學(xué);2013年

3 古存;液壓機(jī)械復(fù)合無(wú)級(jí)傳動(dòng)控制器研制[D];燕山大學(xué);2013年

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本文編號(hào)：1399194