An efficient closed loop control system to follow, capture and redirect daylight

Abstract

Generally, one of the key requirements of modern buildings, besides an appropriate heating and ventilation, is to offer and maintain a suitable lighting. In this contribution, a description of a system capturing and re-directing sunlight into open spaces inside the building without affecting the inside temperature (isotherm) is given. The system mainly consists of three principal components: a mirror capturing the light of the sun and reflecting it inside the building via a prism system, a printed circuit board with two photovoltaic sensors for positioning the mirror, and finally, a motor rotating the printed circuit board and mirror. A closed-loop control system to track the movement of the sun is proposed. The results show good tracking behavior

Optimization Controller for Mechatronic Sun Tracking System to Improve Performance

“…The common task of all three methods is identifying and trailing the position of the sun between sunrise and sunset periods. The closed-loop control method uses feedback sensors such as LDRs, photodiodes, light-intensity sensors, reference cells, and a signal processing circuit [11][12][13]. The duty of the signal processing circuit is to compare the sensor's output signal with the desired signal condition producing an error signal.…”

“…The whole sentence "The proposed control strategy differs from the others, that is; used open-loop [2,7,11], closedloop [5,[12][13][14], and hybrid [24,25] control strategies are the following. " is revised as "The proposed control strategy that is used differs from open-loop [2,7,11], closed-loop [5,[12][13][14], and hybrid [24,25] control strategies as stated below.…”

“…is revised as "The proposed control strategy that is used differs from open-loop [2,7,11], closed-loop [5,[12][13][14], and hybrid [24,25] control strategies as stated below. The systems that use open-loop control strategy have time based error.…”