Control system design for radiator thermal characteristics experiment system

The radiator thermal characteristics experiment system is used to test the thermal output of radiator, convector and similar equipments in air-cooled or water-cooled chamber. This paper introduces the designed control system for a water-cooled radiator thermal characteristics experiment system and the hardware of control system. The control strategies of hot-water temperature in heating system and the air temperature in cooling system are analyzed. The control system for heating system combines fuzzy control with feedforward control and cascade control to satisfy the different testing work conditions and higher stability requirements. The cascade control system for cooling system is presented. On basis of traditional cascade control system, the setpoint response controller is designed in terms of the robust control H2 optimal performance specification. According to the system operation requirement for disturbance rejection, a closed-loop for rejecting disturbance signals is configured and the disturbance observer in inner loop is figured out by proposing the desired closed-loop complementary function. Finally, some test experiments are done to show the validity of the designed control system.