In this paper an iterative, closed-loop light control scheme is proposed and evaluated by a white light emitting diode-based, daylight-responsive luminaire to follow the time-varying pattern of correlated colour temperature and illuminance of a daylight scene. The proposed control scheme functions primarily with the response signals of two RGB colour sensors, viz., a daylight sensor to monitor the daylight scene at the window plane and an internal light sensor to monitor the light scene created by the test white light emitting diode luminaire. The control scheme controls the lumen delivery of individual light emitting diode arrays of the test luminaire by adjusting the duty cycles to follow the instantaneous correlated colour temperature of daylight and at the same time to respond to the variation of window plane illuminance in the reverse pattern. Evaluation is conducted by laboratory testing and in situ testing. The maximum deviations in correlated colour temperature, illuminance and chromaticity from the required values under laboratory testing and in situ testing are found to be 25 K , 0 . 7 lx , 0 . 0032 and 84 K , 5 lx , 0 . 0032 , respectively, which establish the acceptable performance of the proposed iterative light control scheme.

中文翻译：

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对日光响应、迭代、闭环光控制方案的评估

在本文中，提出了一种迭代闭环光控制方案，并通过基于白光发光二极管的日光响应灯具进行评估，以遵循相关色温和日光场景照度的时变模式。所提出的控制方案主要利用两个 RGB 颜色传感器的响应信号起作用，即，一个日光传感器来监控窗户平面上的日光场景，以及一个内部光传感器来监控测试白光发光二极管灯具产生的光场景. 控制方案通过调整占空比来控制测试灯具的单个发光二极管阵列的流明传输，以跟随日光的瞬时相关色温，同时响应反向模式中窗口平面照度的变化。评估通过实验室测试和现场测试进行。发现相关色温、照度和色度与实验室测试和原位测试所需值的最大偏差为 25 K , 0 。7 lx , 0 . 0032 和 84 K , 5 lx , 0 . 0032 分别建立了所提出的迭代光控制方案的可接受性能。