本文選題：電控機(jī)械式自動(dòng)變速器(AMT)　切入點(diǎn)：起步控制　出處：《吉林大學(xué)》2016年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：電控機(jī)械式自動(dòng)變速器(Automated Manual Transmission,簡(jiǎn)稱(chēng)AMT)是在手動(dòng)機(jī)械變速器的基礎(chǔ)上安裝自動(dòng)執(zhí)行機(jī)構(gòu)和電控單元,實(shí)現(xiàn)離合器和換擋操作自動(dòng)化的一類(lèi)自動(dòng)變速器。由于AMT保留了手動(dòng)變速器基本的變速器結(jié)構(gòu),與其他類(lèi)型的自動(dòng)變速器相比,其具有結(jié)構(gòu)簡(jiǎn)單、易加工、成本低、傳動(dòng)效率高等優(yōu)勢(shì),符合我國(guó)汽車(chē)行業(yè)發(fā)展需求,被廣泛應(yīng)用到商用車(chē)和微型轎車(chē)。起步控制是AMT控制問(wèn)題的重點(diǎn)與難點(diǎn)。由于干式離合器的存在,AMT的起步控制很難同時(shí)滿(mǎn)足平穩(wěn)起步減小沖擊度和快速起步減小離合器滑摩功的要求,這也制約著AMT的應(yīng)用推廣。另外,車(chē)輛本身的參數(shù)和行駛工況,例如離合器摩擦片的摩擦系數(shù)、車(chē)重、路面狀況、道路坡度等都是隨時(shí)變化的,這也給AMT起步控制帶來(lái)很大困難。為了解決這些AMT起步控制難題,本文提出了帶有模型誤差估計(jì)的優(yōu)化控制策略,該控制策略利用基于線性二次型優(yōu)化控制(Linear Quadratic Regulator,簡(jiǎn)稱(chēng)LQR)的算法對(duì)起步過(guò)程中的發(fā)動(dòng)機(jī)轉(zhuǎn)速、離合器輸入輸出轉(zhuǎn)速差、傳動(dòng)系的沖擊進(jìn)行優(yōu)化,保證車(chē)輛快速平穩(wěn)起步,同時(shí),該算法設(shè)計(jì)了模型誤差估計(jì)器對(duì)車(chē)輛參數(shù)和工況變化帶來(lái)的控制模型誤差進(jìn)行估計(jì),該估計(jì)值反饋給控制模型使車(chē)輛在參數(shù)和工況改變的情況下依然可以順利完成起步。針對(duì)該起步控制策略的研究,本文做了以下方面的工作:1、對(duì)AMT的基本知識(shí)、發(fā)展情況進(jìn)行了學(xué)習(xí),著重研究了應(yīng)用在AMT起步的控制算法。分析了干式離合器的結(jié)構(gòu)、工作原理和AMT起步控制的評(píng)價(jià)指標(biāo),在此基礎(chǔ)上對(duì)常用的AMT起步控制策略進(jìn)行了分析。2、通過(guò)對(duì)AMT工作原理、起步過(guò)程和控制算法的分析,確定了本文研究的主要內(nèi)容:考慮模型誤差估計(jì)的AMT起步優(yōu)化控制策略,并進(jìn)行了控制算法的理論設(shè)計(jì)。3、利用專(zhuān)業(yè)軟件AMESim和AMTLAB/Simulink分別搭建了整車(chē)仿真模型和AMT起步控制算法模型,通過(guò)AMESim-Simulink聯(lián)合仿真的方式對(duì)算法進(jìn)行了驗(yàn)證,同時(shí)也對(duì)不帶有模型誤差估計(jì)的起步優(yōu)化控制算法進(jìn)行仿真,與本算法的仿真結(jié)果進(jìn)行比較。4、利用d SPACE工具搭建了實(shí)車(chē)試驗(yàn)環(huán)境,對(duì)算法進(jìn)行了實(shí)車(chē)測(cè)試,測(cè)試結(jié)果表明該算法不僅可以滿(mǎn)足不同起步意圖的起步過(guò)程,而且可以在車(chē)輛參數(shù)和工況發(fā)生變化時(shí)順利完成起步,并且起步過(guò)程滿(mǎn)足快速性平順性等評(píng)價(jià)要求,證明了算法的實(shí)用價(jià)值。
[Abstract]:Automatic mechanical transmission (Automated Manual Transmission, referred to as AMT) is the installation of automatic actuator and electronic control unit based on manual mechanical transmission, realize a kind of automatic transmission clutch and shift operation automation. Because the AMT retains the basic manual transmission gearbox structure, compared with other types of automatic transmission and it has the advantages of simple structure, easy processing, low cost, high transmission efficiency, in line with the development needs of the automotive industry in China, has been widely applied to commercial vehicles and mini cars. Starting control is AMT control key and difficult problem. Because the dry clutch, the starting control of AMT is difficult to meet the smooth start to reduce the friction work of clutch requirements and reduce the impact of fast, it also restricts the popularization and application of AMT. In addition, the parameters of the vehicle itself and driving conditions, such as friction clutch The coefficient of friction, friction plate weight, road conditions, road slope are subject to change, it also gives AMT starting control very difficult. In order to solve these problems AMT starting control, optimal control strategy is proposed in this paper with model error estimation, linear quadratic optimal control of two based on the control strategy and (Linear Quadratic Regulator, referred to as LQR) algorithm to the process of starting the engine speed, the clutch input and output speed difference, the impact of transmission system optimization, ensure the vehicle fast smooth start, at the same time, the algorithm design of the control model of model error estimator of vehicle parameters and conditions are estimated, the estimated value of feedback to control the vehicle model in changing the parameters and conditions of the case can still be successfully started. According to the research of the control strategy of the start, this paper made the following work 1, basic knowledge of AMT, the development of the study focuses on the control algorithm used in AMT started. Analysis of the structure of dry clutch, AMT working principle and starting control of the evaluation index, based on the commonly used AMT starting control strategy of.2, the working principle of the AMT the starting process, analysis and control algorithm, and determine the main contents of this paper: the AMT starting control strategy optimization model error estimation is considered, and the theoretical design of.3 control algorithm, using professional software AMESim and AMTLAB/ Simulink respectively to build a simulation model of vehicle starting control algorithm and AMT model by AMESim-Simulink joint simulation mode the correctness of the algorithm, but also to start with optimal control algorithm simulation model error estimation, and simulation results of this algorithm were compared by using D SPA.4. CE tools to build a real vehicle test environment, the algorithm for vehicle test, the test results show that this algorithm can not only meet the starting process of different starting intention, but also in the vehicle parameters and the working condition is changed smoothly starting and starting process to meet the fast ride comfort evaluation requirements, proves the practicality of the proposed algorithm.

【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】：2016
【分類(lèi)號(hào)】：U463.212

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