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Benefits and challenges of controlling a LED AFS (adaptive front-lighting system) using fuzzy logic

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Abstract

The vehicular illumination system has undergone considerable technological advances in recent decades such as the use of a Light Emitting Diode (LED) Adaptive Front-lighting System (AFS), which represents an industry breakthrough in lighting technology and is rapidly becoming one of the most important innovative technologies around the world in the lighting community. This paper presents AFS control alternatives using fuzzy logic (types 1 and 2) to determine its operating parameters taking into consideration the road conditions in the state of São Paulo (Brazil). Fuzzy logic is a well-known extension of the conventional (Boolean) logic that enables the treatment of uncertainty present in the information through the definition of intermediary membership values between the “completely true” and the “completely false”. This technique or modeling strategy is particularly important when a multi-parameter decision must be taken or the decisions are based on the human knowledge. The results show the potential of the methodology proposed and its suitability for light control providing safer nighttime driving.

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Abbreviations

a 0, a 1 :

output model parameters

Δ :

deviation of type-1 interval fuzzy set

σ :

standard deviation of type-1 Gaussian fuzzy set

y :

current to LEDs (mA)

V :

velocity of the vehicle velocity (km/h)

R :

radius of the curve (m)

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Authors and Affiliations

  1. Ford Motor Company, Av. do Taboao 899, Sao Bernardo do Campo, Sao Paulo, 09655-900, Brazil

    L. Lukacs & M. Dassanayake

  2. SENAI/CIMATEC, Av. Orlando Gomes 1845, Salvador, Bahia, 41.650-010, Brazil

    R. Magalhaes

  3. Universidade Federal da Bahia, Bahia, 40.210-630, Brazil

    C. Fontes, M. Embirucu & I. M. Pepe

Authors
  1. L. Lukacs
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  2. M. Dassanayake
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  3. R. Magalhaes
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  4. C. Fontes
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Correspondence to L. Lukacs.

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Lukacs, L., Dassanayake, M., Magalhaes, R. et al. Benefits and challenges of controlling a LED AFS (adaptive front-lighting system) using fuzzy logic. Int.J Automot. Technol. 12, 579–588 (2011). https://doi.org/10.1007/s12239-011-0068-y

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