Lighting Control in Intelligent Buildings by Using Multivariable Neoural Network
|關鍵字:||類神經;燈光控制;多變量;neural network;lighting control;multivariable|
Since the price of gas and utilities has increased in recent years, people have become more environmentally conscious. For example, many families have started to use LED lights and buy energy efficient products. This study provides two methods for setting up these control systems for intelligent buildings. In addition, intelligent buildings have also become more advanced to help save energy. This study analyzes the distribution of illumination in both an individual working place and a whole room with Tracepro software. Illumination provided by the outdoor light is a disturbance; as a result, the controller would adjust by turning off some unnecessary lamps. The two methods used are Best Choice control and back propagation learning neural network control methods. Each is used to control the nine lamps in our experiment room; moreover, the back propagation learning neural network control method can be also applied to other rooms with different number of lamps and different positions of measurement points. Controllers in this study are all constructed by a Matlab software and a Simulink software in computers and the multivariable control system contains ten inputs and nine outputs. These two control methods let us save energy efficiently. With one measurement point, the Best Choice control method can save about 21.4% of daily lighting energy use. In the same situation, the back propagation learning neural network control method can save about 42.0% of daily lighting energy use. Moreover, with two measurement points, the back propagation learning neural network control method can save about 26.6% of daily lighting energy use. After changing the traditional T5 fluorescent luminaires to LED luminaires in the experiment room, the back propagation learning neural network control method can save about 14.0% of daily lighting energy use at two measurement points. Furthermore, without control, T5 fluorescent luminaires consume about 5.712 Kw-h per day; LED luminaires consume about 4.160 Kw-h per day. However, with control, T5 fluorescent luminaires consume about 4.192 Kw-h per day; LED luminaires consume about 3.593 Kw-h per day.