Approach in development and implementation of automatic control system in a smart building

Abstract

The research shows an approach to develop and implement a control system in an observed building. For this purpose, two approaches with simulation results are presented. The first approach is theoretical in nature, with derived equations of a mathematical model. These models are presented in the program ©MATLAB Simulink with the results of temperature change simulations. The second experimental approach is the implementation of a real remote-control system developed with the ©Siemens TIA Portal software tool. It is based on derived system components from the mathematical model. The user interfaces of the system were created using the ©WinCC program. All this was done using the example of a family house with three residential units. The system was developed with the purpose of reducing the needs of thermal energy compared to the existing system. By measuring the heat energy needs, it was found that the new remote-control system reduces the heat energy needs by 12.4 % within one calendar year compared to the existing control system. The reason for this is the implementation of several operating modes in the system: night operation mode, working operation mode and rest operation mode. The system is implemented in such a way that the user can monitor and control the air temperature in the observed room from anywhere and at any time by using a cell phone, computer and Internet connection. It is possible that all housing units in the observed facility are controlled separately. The electric valves of the radiators are controlled by proportional–integral–derivative (PID) controllers. During the automatic adjustment of the PID controller parameters, the values were calculated: proportionality gain constant K = 1.26214 and gain constant of the integration part KI = 7.01238.