直流變換器的魯棒控制算法
發(fā)布時(shí)間：2018-11-02 08:51
【摘要】：DC-DC開(kāi)關(guān)變換器控制問(wèn)題的研究是當(dāng)前功率電子學(xué)研究的主要方向之一，通過(guò)對(duì)它的控制來(lái)改善變換器的輸出電能質(zhì)量。相比于傳統(tǒng)的PWM控制，找到一種更有效控制方法來(lái)提高變換器的動(dòng)態(tài)性能和穩(wěn)態(tài)性能指標(biāo)，是當(dāng)前形勢(shì)所需。 本文致力于研究Hē控制和無(wú)源控制等魯棒控制方法應(yīng)用于DC-DC開(kāi)關(guān)變換器的理論與技術(shù)。針對(duì)系統(tǒng)的干擾抑制問(wèn)題和魯棒鎮(zhèn)定問(wèn)題，通過(guò)建立變換器的確定模型和不確定模型，研究解決上述問(wèn)題的魯棒控制算法。具體內(nèi)容如下： 1．考慮電路輸入端和輸出端擾動(dòng)以及外部噪聲的影響，建立直流變換器的增廣狀態(tài)空間平均模型。應(yīng)用Hē控制理論推導(dǎo)控制器算法來(lái)抑制干擾，以保證系統(tǒng)的魯棒穩(wěn)定性和動(dòng)態(tài)響應(yīng)性能。以boost變換器為例說(shuō)明Hē控制器的計(jì)算過(guò)程，時(shí)域和頻域的仿真結(jié)果表明該算法得到的控制器對(duì)干擾抑制的有效性。 2.基于直流變換器的切換線性模型，提出了一種通過(guò)調(diào)節(jié)輸入電壓來(lái)穩(wěn)定輸出的魯棒控制算法。通過(guò)建立直流變換器的擴(kuò)張切換線性模型，應(yīng)用線性矩陣不等式(LMI)性質(zhì)和Hē控制理論，給出了該線性切換系統(tǒng)的Hē控制器存在的充分條件和設(shè)計(jì)方法的LMI形式。所得控制器使直流變換器閉環(huán)系統(tǒng)在任意切換策略下漸近穩(wěn)定且具有Hē性能界。Buck和boost變換器的仿真結(jié)果顯示了該控制器能有效抑制輸出端干擾，魯棒穩(wěn)定性好；可用任意常數(shù)占空比切換變換器系統(tǒng)，在參數(shù)擾動(dòng)時(shí)自動(dòng)調(diào)節(jié)輸入電壓實(shí)現(xiàn)輸出電壓穩(wěn)定在期望值上。 3.以buck直流變換器為研究對(duì)象，推導(dǎo)了非線性魯棒控制算法以達(dá)到減小干擾影響的目的。首先在buck變換器非線性模型的基礎(chǔ)上，建立具有擾動(dòng)的系統(tǒng)誤差模型。然后根據(jù)無(wú)源性控制理論，得到Hē控制器及其參數(shù)約束條件，并理論分析了閉環(huán)控制系統(tǒng)的穩(wěn)定性。最后對(duì)buck變換器元件參數(shù)擾動(dòng)的情況進(jìn)行數(shù)值模擬和電路仿真來(lái)驗(yàn)證該控制算法的正確性和有效性。 4.考慮buck變換器中的多個(gè)參數(shù)存在不確定的情況，通過(guò)一階泰勒近似的方法建立buck變換器的參數(shù)不確定模型，應(yīng)用LMI和Hē控制理論，研究其輸出反饋Hē控制算法。給出該不確定buck系統(tǒng)的輸出反饋Hē控制器存在的充分條件和計(jì)算方法，所得控制器使得buck變換器閉環(huán)系統(tǒng)在多個(gè)參數(shù)小范圍變化的情況下漸近穩(wěn)定且對(duì)外部噪聲的抑制具有最大Hē魯棒性能界。 5.為提高直流變換器對(duì)干擾及不確定因素的魯棒性，提出了一種基于LMI的魯棒PID控制算法。PID參數(shù)應(yīng)用區(qū)域極點(diǎn)配置的方法來(lái)整定。將PID控制和Hē控制相結(jié)合，以LMI形式給出Hē PID控制器的可解性條件。所得的控制器使得閉環(huán)系統(tǒng)滿足：閉環(huán)極點(diǎn)分布在指定區(qū)域內(nèi)以獲得期望的動(dòng)態(tài)特性；對(duì)外部噪聲的抑制具有最大Hē魯棒性能界。此外，該控制算法也可應(yīng)用于參數(shù)不確定的多胞型直流變換器系統(tǒng)。 6.應(yīng)用非線性系統(tǒng)無(wú)源化方法研究了Buck變換器的控制策略�；贐uck變換器的非線性誤差模型，，通過(guò)坐標(biāo)變換得到與之反饋等價(jià)的系統(tǒng)。根據(jù)無(wú)源理論，對(duì)反饋等價(jià)系統(tǒng)施加適當(dāng)反饋使之無(wú)源化，給出了閉環(huán)系統(tǒng)無(wú)源性證明，并構(gòu)造Lyapunov函數(shù)保證閉環(huán)系統(tǒng)的漸近穩(wěn)定性，進(jìn)而得到Buck變換器的無(wú)源反饋控制律。設(shè)計(jì)了該無(wú)源控制器的Pspice仿真電路，仿真結(jié)果表明該無(wú)源控制的Buck變換器輸出的穩(wěn)定性可以得到有效控制，對(duì)負(fù)載擾動(dòng)和輸入電壓擾動(dòng)的魯棒性好，且調(diào)整控制律中的可調(diào)系數(shù)可以改善系統(tǒng)的動(dòng)態(tài)響應(yīng)。
[Abstract]:The research of DC-DC switching converter control is one of the main directions of the current power electronics research, and the output power quality of the converter is improved by its control. Compared with the traditional PWM control, a more effective control method is found to improve the dynamic performance and steady-state performance of the converter, which is the current situation. This paper is devoted to the research of robust control methods such as H-phase control and non-source control, which are applied to the theory of DC-DC switching converters. Aiming at the problem of interference suppression of the system and the problem of rod stabilization, the robust control for solving the above problems is studied by establishing the determining model and uncertain model of the converter. Algorithm. Details 1. Considering the influence of the circuit input terminal and the output end disturbance and the external noise, the augmented state of the DC converter is established. An interval-averaged model is derived by using the H-phase control theory to deduce the controller algorithm to suppress the interference, so as to ensure the stability and stability of the bar of the system. In this paper, the calculation process, time-domain and frequency-domain simulation results of H-phase controller are illustrated by boost converter. Simulation results show that the controller can suppress the interference. 2. Based on the switching linear model of the DC converter, a method for stabilizing the input voltage by adjusting the input voltage is proposed. Based on the linear matrix inequality (LMI) property and H-function control theory, the sufficient conditions and design of the H-function controller of the linear switching system are given. The obtained controller makes the closed loop system of DC converter stable under any switching strategy. and the simulation results of Buck and boost converters show that the controller can effectively suppress the interference of the output end, the stability of the rod is good, the converter system can be switched with any constant duty ratio, The nonlinear robust control algorithm is derived by using buck DC converter as the research object. The purpose of reducing the interference is achieved. First, on the basis of buck converter non-linear model, it is established Then, based on the theory of non-source control, the H-function controller and its parameter constraints are obtained, and the theoretical analysis is carried out. The stability of closed-loop control system is discussed. Finally, numerical simulation and numerical simulation are carried out on the parameter perturbation of buck converter element to verify the control The correctness and effectiveness of the algorithm are given. 4. Considering the uncertain situation of multiple parameters in buck converter, the parameter uncertainty model of buck converter is established by a step Taylor approximation method, and the theory and the H-mode control theory are applied. In this paper, a sufficient condition and a calculation method of the output feedback H-function controller of the buck converter are given. The obtained controller makes the buck converter closed-loop system asymptotic stable and external noise under the condition of small range of parameters. In order to improve the robustness of the DC converter to the interference and uncertain factors, a new method is proposed. A PID Control Algorithm of Rubar Based on Hash Algorithm and PI The D parameter is set by the method of pole configuration of the region. PID control and H-mode control are combined to shape the shape. The controller makes the closed-loop system satisfied: the closed-loop pole is distributed in the designated area to obtain the desired dynamic characteristic; In addition, the control algorithm can also be applied to the suppression of noise. Multi-cell DC converter system with uncertain parameters. 6. Application of nonlinear systems The control strategy of Buck converter is studied without source method. Based on the nonlinear error of Buck converter On the basis of the non-source theory, the feedback equivalent system applies the appropriate feedback to make it non-source, gives the non-source proof of closed-loop system, and constructs Lyapunov function to ensure the asymptotic stability of closed-loop system. Furthermore, the source-free feedback control law of Buck converter is obtained. The Pspice simulation circuit of the non-source controller is designed. The simulation results show that the stability of the output of the non-source controlled Buck converter can be effectively controlled, the robustness of the load disturbance and the input voltage disturbance is good,
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM46
本文編號(hào)：2305533
[Abstract]:The research of DC-DC switching converter control is one of the main directions of the current power electronics research, and the output power quality of the converter is improved by its control. Compared with the traditional PWM control, a more effective control method is found to improve the dynamic performance and steady-state performance of the converter, which is the current situation. This paper is devoted to the research of robust control methods such as H-phase control and non-source control, which are applied to the theory of DC-DC switching converters. Aiming at the problem of interference suppression of the system and the problem of rod stabilization, the robust control for solving the above problems is studied by establishing the determining model and uncertain model of the converter. Algorithm. Details 1. Considering the influence of the circuit input terminal and the output end disturbance and the external noise, the augmented state of the DC converter is established. An interval-averaged model is derived by using the H-phase control theory to deduce the controller algorithm to suppress the interference, so as to ensure the stability and stability of the bar of the system. In this paper, the calculation process, time-domain and frequency-domain simulation results of H-phase controller are illustrated by boost converter. Simulation results show that the controller can suppress the interference. 2. Based on the switching linear model of the DC converter, a method for stabilizing the input voltage by adjusting the input voltage is proposed. Based on the linear matrix inequality (LMI) property and H-function control theory, the sufficient conditions and design of the H-function controller of the linear switching system are given. The obtained controller makes the closed loop system of DC converter stable under any switching strategy. and the simulation results of Buck and boost converters show that the controller can effectively suppress the interference of the output end, the stability of the rod is good, the converter system can be switched with any constant duty ratio, The nonlinear robust control algorithm is derived by using buck DC converter as the research object. The purpose of reducing the interference is achieved. First, on the basis of buck converter non-linear model, it is established Then, based on the theory of non-source control, the H-function controller and its parameter constraints are obtained, and the theoretical analysis is carried out. The stability of closed-loop control system is discussed. Finally, numerical simulation and numerical simulation are carried out on the parameter perturbation of buck converter element to verify the control The correctness and effectiveness of the algorithm are given. 4. Considering the uncertain situation of multiple parameters in buck converter, the parameter uncertainty model of buck converter is established by a step Taylor approximation method, and the theory and the H-mode control theory are applied. In this paper, a sufficient condition and a calculation method of the output feedback H-function controller of the buck converter are given. The obtained controller makes the buck converter closed-loop system asymptotic stable and external noise under the condition of small range of parameters. In order to improve the robustness of the DC converter to the interference and uncertain factors, a new method is proposed. A PID Control Algorithm of Rubar Based on Hash Algorithm and PI The D parameter is set by the method of pole configuration of the region. PID control and H-mode control are combined to shape the shape. The controller makes the closed-loop system satisfied: the closed-loop pole is distributed in the designated area to obtain the desired dynamic characteristic; In addition, the control algorithm can also be applied to the suppression of noise. Multi-cell DC converter system with uncertain parameters. 6. Application of nonlinear systems The control strategy of Buck converter is studied without source method. Based on the nonlinear error of Buck converter On the basis of the non-source theory, the feedback equivalent system applies the appropriate feedback to make it non-source, gives the non-source proof of closed-loop system, and constructs Lyapunov function to ensure the asymptotic stability of closed-loop system. Furthermore, the source-free feedback control law of Buck converter is obtained. The Pspice simulation circuit of the non-source controller is designed. The simulation results show that the stability of the output of the non-source controlled Buck converter can be effectively controlled, the robustness of the load disturbance and the input voltage disturbance is good,
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM46
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 馬寧波;王春平;李波;;系統(tǒng)動(dòng)態(tài)性能指標(biāo)間的聯(lián)系及閉環(huán)零、極點(diǎn)和動(dòng)態(tài)性能之間的關(guān)系[J];四川兵工學(xué)報(bào);2008年06期
2 陳連玉;;交流伺服系統(tǒng)H_∞魯棒控制混合靈敏度指標(biāo)優(yōu)化算法[J];江蘇技術(shù)師范學(xué)院學(xué)報(bào)(自然科學(xué)版);2008年01期
3 吳磊濤,楊兆華,胥布工;DC/DC開(kāi)關(guān)變換器的無(wú)源控制方法[J];電工技術(shù)學(xué)報(bào);2004年04期
4 胡宗波,張波,鄧衛(wèi)華,胡少甫;PWM DC-DC變換器混雜動(dòng)態(tài)系統(tǒng)的能控性和能觀性[J];電工技術(shù)學(xué)報(bào);2005年02期
5 孫文安,趙軍;一類不確定線性切換系統(tǒng)的二次魯棒穩(wěn)定性[J];電機(jī)與控制學(xué)報(bào);2005年03期
6 景麗,高立群;線性周期性切換系統(tǒng)的鎮(zhèn)定及魯棒鎮(zhèn)定研究[J];電機(jī)與控制學(xué)報(bào);2005年03期
7 吳忠強(qiáng);王志君;;DC/DC變換器的一種無(wú)源化控制方案[J];電機(jī)與控制學(xué)報(bào);2008年02期
8 樊麗穎;武俊峰;劉宏亮;王世剛;;不確定系統(tǒng)的變采樣控制[J];電機(jī)與控制學(xué)報(bào);2011年11期
9 張雪霽;張波;王學(xué)梅;;大功率晶閘管并聯(lián)的物理級(jí)均流研究[J];電力電子;2010年03期
10 王鳳巖;許建平;;DC/DC開(kāi)關(guān)電源控制方法小信號(hào)模型比較[J];電力電子技術(shù);2007年01期
相關(guān)博士學(xué)位論文 前2條
1 李思臻;高頻開(kāi)關(guān)電源的高效集成單周期控制策略研究[D];華中科技大學(xué);2010年
2 樂(lè)江源;基于微分幾何理論電力電子變換器非線性復(fù)合控制研究[D];華南理工大學(xué);2011年
本文編號(hào)：2305533
本文鏈接：http://www.wukwdryxk.cn/kejilunwen/dianlilw/2305533.html
最近更新
教材專著
