Development of a hybrid-fuzzy air temperature controller for a supersonic combustion test facility

 Hydrogen gas is burned in air to raise and maintain the stagnation temperature of a supersonic combustion test facility to a desired setpoint. In order to reach the desired operating conditions for stagnation temperature, there are three phases to the hydrogen control; H₂ ignition at facility start-up, H₂ ramp-up while the facility is ramped-up, and H₂ iteration to achieve the desired temperature setpoint. Each phase incorporates a different type of control. Fuzzy logic is used to design a computer based supervisory controller that recognizes the different phases of operation and chooses the appropriate control method. Received: 28 November 1999/Accepted: 2 November 2000