Universal lighting control of unknown connected light emitting diode arrays via a T–S fuzzy model‐based approach

Abstract

This study presents a universal lighting driver for unknown connected light emitting diode (LED) arrays by using a single-ended primary inductor converter (SEPIC) DC/DC converter and a T-S fuzzy model-based current controller. Driving and lighting an LED array with unknown series and parallel connection is a significant research for universal adaptable applications. To this end, the input voltage of the LED array is up/down adjusted by the SEPIC DC/DC converter, whereas exact LED lighting current control is realised by the proposed T-S fuzzy parallel distributed integral compensation control method. For easier implementation, a linear-simplified fuzzy observer is introduced under output feedback. Asymptotic convergence is guaranteed by strict stability analysis and linear matrix inequality gain design. Moreover, the fuzzy lighting current controller does not require the electrical model and arrangement of the LED array. In addition, even if we take uncertainty, disturbance and rapidly changing reference current into consideration, the high robustness and transient response performance are still assured via robust gain design. Finally, the satisfactory performance is shown from experimental results.

Digital Fuzzy Current Controlled Light-Emitting Diode Driver with Power Factor Correction

“…Moreover, there exists uncertainty due to source variations and load changes. Fuzzy logic control (FLC) is advantageous in this regard because it can accommodate parameter variations in the system and can therefore incorporate modeling uncertainty, neglected components, and nonlinearities [22][23][24]. Knowledge-based FLC attempts to code human knowledge, experience, and acumen to be able to make informed choices about the performance of the system.…”

Field programmable gate array implementation of a single‐input fuzzy proportional–integral–derivative controller for DC–DC buck converters

“…Recently, several methods have been proposed in the literature to alleviate the deficiency of the classical PID controller for power converters [7][8][9][10][11][12][13], among which fuzzy logic as a type of non-linear control technique has been utilised for DC-DC converter and other applications [14][15][16][17][18][19][20][21]. Unfortunately, the dynamic performances of the fuzzy logic controlled power converters are far from satisfactory.…”