Question

Scenario: A general heating system control loop is shown in Figure 5. The following discussions can use the scenario in Figure 5 asya background profile. Error signal - Room Comparison low voltage Valve motor Desired Device Heating value →+ Controller > Actuator Process (set point) Temperature Sensor Sensor Feedback path HVAC HEATING SYSTEM CONTROL LOOP DIAGRAM Figure 5 Task 5.1 (5.1) Explain the importance of a control system in a heating system. What do you expect the general response of a control process?

Answer 1

hore wecan and within electronic control systery and carrils i feedback control is more commonly used than open-loop of feed forward controle closed loop systems many advantages over open-loop system. The primary advantage of a closped-loop feedback control system is its ability to reduce system's sensitivity to external disturbances for example opening of the dayer doon, giving the system a more robust control as any changes in the feedback signes will result in compensation by the conpoller a importance of control system in heating systems to be define the main characteristics of closed-loop control as being (1) To reduce enoux by automatically adjusting the systems imput. (3) To impore stability of an unstable system. (8) To increase or reduce the systenip sensitivity. (4) To enhance robustness against external disturbances to the pween, (s) To produce a reliable and repeatable performance, closed loop systery representation Forward paty output mont oe Gror summing Print H feed back path

Where is, represents the open loop gains of the confoller or systers and is the forward path. And lockH represents the gain of the sensor, transduar or mearmement system in the feedback system. output from the system is output = ax error output = GX (mput - 4x output) wxmput output of G H ontput imput TIGH ontput output mput ItGH The above equation for the transfer function of a closed loop system,