本文關(guān)鍵詞：基于傳統(tǒng)和二階滑模理論的功率變換器控制設(shè)計(jì)　出處：《江蘇大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： Buck變換器 滑�？刂� 擾動(dòng)觀測(cè)技術(shù) 有限時(shí)間穩(wěn)定 定頻控制

【摘要】：隨著社會(huì)的發(fā)展,電子設(shè)備的種類日趨多樣化,對(duì)電源的要求也日益提高。開關(guān)電源因具有效率高、能耗低、性能穩(wěn)定等優(yōu)點(diǎn),得到了廣泛的應(yīng)用。實(shí)現(xiàn)功率變換是開關(guān)電源的基礎(chǔ)。通過設(shè)計(jì)高效的控制方法,可以提高功率變換器的性能指標(biāo)。鑒于傳統(tǒng)線性PID控制器在大擾動(dòng)工況條件下的功率變換器中未能獲得令人滿意的控制效果。為了得到更好的控制效果,很多學(xué)者致力于研究新的控制方法。本文利用滑�？刂评碚�,先后設(shè)計(jì)了兩種非線性控制方法,并給出了理論可行性分析和上述控制方法的具體實(shí)現(xiàn)步驟,本文主要工作如下:(1)對(duì)功率變換器的研究方法和滑�？刂评碚摷捌湓诠β首儞Q器上應(yīng)用的研究現(xiàn)狀進(jìn)行了闡述,并明確本論文研究的主要研究內(nèi)容。(2)完成了功率變換器建模和軟硬件平臺(tái)設(shè)計(jì)。首先以Buck變換器為例,分析工作原理,并考慮系統(tǒng)擾動(dòng)因素,建立實(shí)際數(shù)學(xué)模型。然后設(shè)計(jì)Buck變換器的底層硬件電路板模塊,再將所設(shè)計(jì)的實(shí)際電路通過數(shù)據(jù)采集卡與LabVIEW軟件連接,通過LabVIEW編寫算法程序,實(shí)現(xiàn)閉環(huán)控制平臺(tái)的搭建。以PID控制算法為例,驗(yàn)證了軟硬件實(shí)驗(yàn)平臺(tái)的可行性。(3)設(shè)計(jì)了基于一階滑模與擾動(dòng)觀測(cè)的Buck變換器復(fù)合控制方法。首先,引入擾動(dòng)觀測(cè)技術(shù)觀測(cè)電壓偏差變化率中的擾動(dòng),設(shè)計(jì)包含補(bǔ)償量的滑模面,然后采用趨近律法對(duì)控制器進(jìn)行設(shè)計(jì)。考慮到一階滑模的抖振問題,采用準(zhǔn)滑動(dòng)模態(tài)方法改進(jìn)控制器,接著再次引入擾動(dòng)觀測(cè)技術(shù)來補(bǔ)償系統(tǒng)中的集總擾動(dòng),并通過仿真和實(shí)驗(yàn)驗(yàn)證該控制方法的有效性。(4)設(shè)計(jì)了基于二階滑模的Buck變換器控制方法。首先利用二階滑�？刂萍夹g(shù),設(shè)計(jì)非連續(xù)的二階滑�？刂破�,然后將實(shí)際控制器取為非連續(xù)控制器的積分,從而避免了控制器的抖振。理論上通過Lyapunov穩(wěn)定性定理證明所提方法的有限時(shí)間穩(wěn)定性。最后通過仿真和實(shí)驗(yàn)驗(yàn)證了該控制方法在保證魯棒性的同時(shí)也避免了滑模的抖振問題。(5)對(duì)本文的研究內(nèi)容進(jìn)行了總結(jié),指出了本文存在的缺陷和有待進(jìn)一步改善提高之處,并對(duì)未來的研究方向進(jìn)行展望。
[Abstract]:With the development of society, the kinds of electronic equipment is becoming more diverse, the power requirements are increasing. The switching power supply has the advantages of high efficiency, low energy consumption, stable performance and other advantages, has been widely used. The power converter is based switching power supply. The design of efficient control method, can improve the performance of power converter in view of the traditional linear PID controller in power converter to large disturbance conditions to obtain satisfactory control effect. In order to get better control performance, many scholars dedicated to the study of new control method. By using the sliding mode control theory, has designed two kinds of nonlinear control methods, and gives concrete realization step theory feasibility analysis and the control method, the main work is as follows: (1) the power converter research method and sliding mode control theory in power Change the state of the study on application are discussed, the main research contents and clear in this paper. (2) completed the design of the power converter modeling software and hardware platform. Based on the Buck converter as an example, analysis of the working principle, and considering the system disturbance factors, establish the model of the actual number of hardware circuit board bottom. Then the module design of Buck converter, and then the actual circuit design through the data acquisition card is connected with the LabVIEW software, the program is compiled by LabVIEW, to build a platform to achieve closed-loop control. The PID control algorithm as an example, to verify the feasibility of hardware and software experimental platform. (3) the design of the Buck converter control method observation and order based on sliding mode disturbance. Firstly, introducing disturbance observation technology observation voltage deviation change rate of the sliding surface design includes the compensation amount, and then the approach to controller design law. Taking into account the chattering problem of first-order sliding mode, quasi sliding mode method is used to improve the controller, and then re introduced the disturbance observation technology to compensate system lumped disturbance, and the validity of the control method is verified by simulation and experiment. (4) the design of the Buck converter two order sliding mode control method based on the first use. Two order sliding mode control technique, the design of two order sliding mode controller is continuous, then the actual controller for the non continuous integral controller, thereby avoiding the chattering of the controller. The theory of finite time stability proved by Lyapunov stability theorem of the proposed method. The simulation and experimental results verify the control method to ensure the robustness at the same time to avoid the chattering of the sliding mode. (5) the contents of this study are summarized, pointing out the shortcomings of this paper are to be further improved and improved, and the The research direction is prospected.

【學(xué)位授予單位】：江蘇大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TP273;TM46

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