本文關(guān)鍵詞：多電飛機(jī)功率電傳作動(dòng)器研究　出處：《南京航空航天大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 電靜液作動(dòng)器 滑模變結(jié)構(gòu)控制 多電飛機(jī) 無刷直流電機(jī) 功率電傳

【摘要】：近年以來,在飛機(jī)設(shè)計(jì)領(lǐng)域,多電飛機(jī)(More Electric Aircraft,MEA)的研究受到了世界各國科研人員越來越多的重視。功率電傳作動(dòng)技術(shù)(Power by Wire,PBW)作為MEA的核心技術(shù),成為現(xiàn)今飛機(jī)傳動(dòng)領(lǐng)域的研究熱點(diǎn)。電靜液作動(dòng)器(Electro-Hydrostatic Actuator,EHA)是PWB的重要實(shí)現(xiàn)形式,本文對(duì)其工作原理和控制方法進(jìn)行了研究并且分別建立EHA的線性化模型和非線性模型。本文首先建立了EHA的線性化數(shù)學(xué)模型。EHA的線性化數(shù)學(xué)模型包含了電機(jī)模型,液壓泵模型,液壓缸模型和負(fù)載模型。在推導(dǎo)出了EHA系統(tǒng)的傳遞函數(shù)的基礎(chǔ)上,利用MATLAB/Simulink進(jìn)行了模型設(shè)計(jì)和仿真實(shí)驗(yàn),控制方案采用了經(jīng)典PID控制。無刷直流電機(jī)(Brushless DC Motor,BLDCM)在EHA系統(tǒng)實(shí)現(xiàn)了電能到機(jī)械能的轉(zhuǎn)換,也是EHA的動(dòng)力輸入來源。本文對(duì)無刷直流電機(jī)進(jìn)行了精細(xì)建模,設(shè)計(jì)了電流滯環(huán)和轉(zhuǎn)速閉環(huán)控制的雙閉環(huán)調(diào)速方案。為了避免數(shù)學(xué)模型不能涵蓋模型的液壓元件的部分非線性因素的影響,使用MATLAB/Simulink液壓工具箱與機(jī)械工具箱等進(jìn)行物理建模和仿真實(shí)驗(yàn)�？紤]到EHA工作時(shí)系統(tǒng)的非線性摩擦力的影響,建立了EHA的非線性模型,并且根據(jù)計(jì)算機(jī)控制的需要,對(duì)模型進(jìn)行了離散化處理。然后,將連續(xù)系統(tǒng)中的滑模變結(jié)構(gòu)控制(Sliding Mode Control,SMC)理論應(yīng)用到離散型系統(tǒng)中,設(shè)計(jì)了滑模面和控制器,進(jìn)行了仿真實(shí)驗(yàn)。通過與傳統(tǒng)的線性模型的仿真結(jié)果進(jìn)行了對(duì)比,表明了滑模變結(jié)構(gòu)控制方法更適合于EHA系統(tǒng)的控制。通過對(duì)EHA的結(jié)構(gòu)和工作原理研究,本文建立了EHA的多種狀態(tài)下的數(shù)學(xué)模型,實(shí)現(xiàn)了滑模變結(jié)構(gòu)控制方法在EHA控制領(lǐng)域的應(yīng)用。解決了EHA系統(tǒng)響應(yīng)時(shí)間過長,工作頻寬較窄的問題。
[Abstract]:In recent years, in the field of aircraft design, the research of More Electric Aircraft (MEA) has been paid more and more attention by researchers all over the world. Power by Wire (PBW), as the core technology of MEA, has become a hot research topic in the field of aircraft transmission. Electro-Hydrostatic Actuator (EHA) is an important realization form of PWB. In this paper, its working principle and control method are studied, and EHA's linearization model and nonlinear model are established respectively. In this paper, the linearized mathematical model of EHA is first set up. The linear mathematical model of EHA includes the motor model, the hydraulic pump model, the hydraulic cylinder model and the load model. On the basis of the derivation of the transfer function of the EHA system, the model design and simulation experiment are carried out with MATLAB/Simulink, and the control scheme adopts the classical PID control. Brushless DC Motor (BLDCM) realizes the conversion of electrical energy to mechanical energy in EHA system, and is also the source of dynamic input of EHA. This paper makes a fine modeling of Brushless DC motor, and designs a double closed loop speed control scheme of current hysteresis loop and speed closed loop control. In order to avoid that mathematical models can not cover the influence of some nonlinear factors of the hydraulic components of the model, physical modeling and simulation experiments are carried out by using MATLAB/Simulink hydraulic toolbox and mechanical toolbox. Considering the influence of nonlinear friction of EHA system, a nonlinear model of EHA is established, and the model is discretized according to the need of computer control. Then, the Sliding Mode Control (SMC) theory is applied to the discrete system, and the sliding surface and controller are designed, and the simulation experiments are carried out. The comparison of the simulation results with the traditional linear model shows that the sliding mode variable structure control method is more suitable for the control of the EHA system. By studying the structure and working principle of EHA, a mathematical model of EHA under various conditions is established, and the application of sliding mode variable structure control in the field of EHA control is realized. It solves the problem that the response time of EHA system is too long and the working frequency is narrow.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：V242

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