Minimizing energy consumption of lighting system using fractional-order extremum seeking control

In this paper, a lighting control algorithm is proposed to minimize energy usage despite environmental variations. A hardware-in-the-loop prototype of a minimum energy cognitive lighting control is developed. A fractional-order extremum seeking controller (ESC) with switching surfaces is employed to minimize energy usage, when a PID law is applied to maintain a desired light level. The principle and stability of the proposed minimum energy cognitive lighting control scheme are analyzed mathematically. The hardware-in-the-loop experimental results are presented to demonstrate the practicality and effectiveness of the proposed cognitive lighting control scheme.