Temperature and flow control system of water transfer laboratory model

U ovom radu je, u svrhu izrade regulacijskog sustava za razinu tekućine, proučena dokumentacija na temelju koje su određene željene performanse te je određen način komunikacije među komponentama. Nakon toga je uspostavljen matematički model na temelju kojeg su sintetizirani regulatori za upravljanje protokom u ventilu (unutarnja petlja regulacije) te regulator za upravljanje razinom tekućine (vanjska petlja regulacije). Sintetizirani regulatori su testirani te je na temelju dobivenih podataka donesen zaključak da regulator vanjske petlje ne daje zadovoljavajući odziv na poremećaj. Također je dan matematički model za upravljanje temperaturom spremnika, te se predlaže mijenjanje trenutnog grijača kojeg je moguće samo upaliti i ugasiti, s grijačem koji može primiti referentnu veličinu. Na temelju novog grijača mogla bi se implementirati PID regulacija koja ima znatno bolje performanse glede dostizanja zadane referentne veličine za razliku od trenutnog stanja u kojem se može koristiti samo ON- OFF regulacija.In this paper, for the purpose of creating a regulatory system for the liquid level, the documentation was studied on the basis of which the desired performance was determined and the method of communication between the components was determined. After that, a mathematical model was established on the basis of which regulators for controlling the flow in the valve (inner loop of regulation) and a regulator for managing the liquid level (outer loop of regulation) were synthesized. The synthesized regulators were tested and based on the obtained data it was concluded that the external loop regulator does not provide a satisfactory response to the disturbance. A mathematical model for managing the tank temperature is also given, and it is suggested to replace the current heater, which can only be turned on and off, with a heater that can accommodate a reference size. On the basis of the new heater, PID regulation could be implemented, which has significantly better performance in terms of reaching the set reference size, unlike the current state in which only ON-OFF regulation can be used