The remarkable characteristic of lighting system based on digital addressable lighting interface is panorama supervised which results from feedback control. This paper proposes the three-state feedback mechanism and the relative system consists of master units, slave units and a graphical user interface (GUI) for inputting parameters and supervising the detail of system. Slave units include standard slave units and feedback slave units which have AT90PWM2 controller. Built upon this system, the three-state feedback mechanism takes the feedback comprising the states of controller unit, implementation unit and controlled object unit according to the requirement of lighting protocol. Experimental results will be provided to verify the effectiveness of the proposed system.
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Zhong et al. (2009) studied this question.
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