This paper deals with the design and
implementation of the hot-gas temperature control system in
heat-calibration wind tunnel. According to the control
requirements for gas temperature of the heat-calibration wind
tunnel, a fuel supply system based on variable frequency control
technology and proportional throttle valve is designed.
In order to improve the level of automation of the control system, a
computer control system which consists of PLC and industrial
personal computer is designed. On this basis, the dynamic
characteristics of the system are analyzed, and the mathematical
model of the system is established. Addressing the
characteristics of the system, a DMC-PID cascade control law is
used to achieve a precise control of the gas temperature of the
heat-calibration wind tunnel.