- 學位論文
升-降壓型LED驅動電路之T-S模糊控制器設計
T-S Fuzzy Controller Design for Buck-Boost LED Driver
摘要
本論文之目的為對未知排列組合的LED負載設計一個模糊控制調光驅動器。以往的驅動控制器設計只注重在效率上的提升，必須知道LED負載的組成；故本論文將利用DC/DC升-降壓電路做為驅動電路，以T-S模糊理論來設計升-降壓型電源轉換器的控制器，其優點為收斂速度快及高穩定度，且不需知道LED之組成。 在本論文中，首先運用狀態空間平均法建立切換式轉換器非線性系統的動態方程式，接著導入T-S模糊模式設計積分型模糊控制器做輸出調整，使系統中輸出穩態誤差等於零，最後以Lyapunov函數做系統穩定性分析，並利用線性矩陣不等式技術設計控制器的控制增益。為了驗證所提出的控制方法，採用數位訊號處理卡（DSP 卡）實現所發展之控制器，並測試不同之LED模組切換及電源變動之響應。
並列摘要
The purpose of this thesis is to design a T-S fuzzy dimming controller for an unknown arranged LED array. In the past, the LED driving controller design only focuses on efficiency improvement, so that we should know the composition of the LED array, i.e., the application is limited. To solve this problem, we will use the DC/DC Buck-Boost circuit as a driver circuit and apply T-S fuzzy theory to design the controller of buck-boost converter. The advantage of this approach is fast convergence and high stability. The control gains are obtained by solving a set of LMIs. In order to verify the validity of the proposed control method, we apply digital signal processing card (DSP card) to implement the controller. Finally, we end up with close-loop system simulations.