微控制器
亮度
控制理论(社会学)
脉冲宽度调制
控制器(灌溉)
计算机科学
模糊逻辑
模糊控制系统
计算机硬件
工程类
电压
控制(管理)
人工智能
电气工程
物理
光学
农学
生物
标识
DOI:10.1109/iciea.2010.5515533
摘要
This paper presents the closed-loop control of high brightness LED lamps using microcontroller. Three types of controllers, proportional-integral (PI) controller, look-up table fuzzy logic controller and real-time calculation fuzzy logic controller are implemented for performance comparison. A photosensitive resistor senses the LED brightness and an 8-bit microcontroller converts brightness signal to numerical value and performs control algorithm. The algorithm is programmed in C language. Selected inputs for fuzzy control algorithm are the brightness error and the change of brightness error. Pulse width modulation (PWM) correction is the only output of the controller and PWM current source is used to drive the LED lamp. Experimental results show that the PI controller needs the least memory and run time, and the real-time calculation fuzzy logic controller requires the most memory and run time, among the designed controllers.
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