Halogen daylight control system based on CMAC controller

Abstract

The paper describes the design, the implementation and the tuning of a CMAC (Cerebellar Model Articulation Controller) based controller used in an automatic daylight control system. After the tuning of the controller is presented the behavior of the automatic lighting control system (ALCS) based on the CMAC controller when the illuminance on working plane is disturbed by an additional illuminance produced by a supplementary electric light source (a halogen desk lamp). The ALCS attempt to maintain constant the illuminance at the desired level on working plane even the perturbation signal is present. The applied structure of control needs the inverse model of the process. For this purpose it was used an experimental model of process, a look up table (LUT) of measured data at the input and the output of process. The transformation given by the LUT is not single-valued, so this inverse model obtained by using the LUT is a gross approximation of the real inverse model of process. Even if the inverse model of process is not the best solution it can achieve the desired performances for the ALCS.