Daylight-adaptive lighting control using light sensor calibration prior-information

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37 Citations (Scopus)

Abstract

We consider a daylight-adaptive lighting control system to adapt dimming levels of artificial light sources with changing daylight, under illumination constraints specified at the horizontal workspace plane of an occupant. We propose a control method for achieving a minimum illuminance at the workspace plane using illuminance measurements at light sensors situated at the ceiling, and additional prior-information from sensor calibration. The proposed method results in a linear programming optimization problem with inequality constraints. Using simulations with photometric data, we compare our sub-optimum solution with the solution where knowledge of the illuminance mapping from the light sensors to workspace illuminance values is available, and with a reference method that is based on satisfying illuminance constraints specified at the light sensors.

Original languageEnglish
Pages (from-to)105-114
Number of pages10
JournalEnergy and Buildings
Volume73
DOIs
Publication statusPublished - 1 Apr 2014

Keywords

  • Convex optimization
  • Daylight-adaptive lighting control
  • Energy-efficient lighting systems
  • Light sensor calibration

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