Abstract

The purpose of this thesis is to develop an intelligent aircraft window system for visual comfort control based on electrochromic windows that can change the transparency depending on passenger’s needs and visual comfort. In the current window system, window transparency is controlled manually. The system developed in this thesis is an automatic system. Under this development, a mock-up is set up to mimic a section of cabin with an electrochromic window along with a simulated sunlight source and several light sensors. To measure visual comfort, the daylight glare index (DGI) is adopted. Based on DGI, a fuzzy logic classifier is developed to evaluate visual comfort/discomfort. This is followed by developing a fuzzy logic controller that can automatically adjust the window transparency based on the measured DGI level and the rate of change of DGI. DGI set point for different individuals, the effect of illuminance and color temperature are also discussed

Highlights

  • 4.1 Fuzzy Logic Introduction As discussed in preceding chapters, the measurement used for discomfort measure is DGIN, The DGIN values can be used to form the membership functions in fuzzy logic and the output of the fuzzy logic can adjust the transparency of the window for control

  • Due to the limitation of the light source, they were only allowed to adjust color temperature from 2000 K to 6535 K

  • This work started with the literature review of various work that were done by scholars that were related to visual comfort

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Summary

Introduction

1.1 BackgroundTravelling by air is one of the most common ways to quickly get to the destinations of both long and short distances. With an already astounding 3.8 billion air travelers in 2016, it is expected that the number of air travel will be double by 2035 [1] For such a large market that the aircraft industry foresees, a large number of low-cost airlines emerge to incite competition that becomes fiercer than ever. As discussed in preceding chapters, the measurement used for discomfort measure is DGIN, The DGIN values can be used to form the membership functions in fuzzy logic and the output of the fuzzy logic can adjust the transparency of the window for control. We use this logic to adjust the roll angle of Venetian blinds (Figure 4.1), and the same logic behind adjusting the transparency of a smart window can be used

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