摘要：AbstractThe turbine outlet temperature is one of the key performance parameters that affect the usage life of variable cycle engine (VCE). As a potential way to extend the usage life, the lowest turbine outlet temperature performance seeking control is widely applied by adjusting all possible control variables. In this paper, grey wolf optimizer (GWO) is utilized to obtain the optimal control variables sequences, which ensures a lower turbine outlet temperature with unchanged thrust. Besides, all kinds of mechanical and operating limits are also considered under several typical working conditions for VCE. According to the optimized sequences, the lowest turbine outlet temperature closed-loop control mode is constructed based on active disturbance rejection control (ADRC) to realize the multivariable control of the VCE. Moreover, a smooth mode transition is designed from the traditional operational mode to the lowest turbine outlet temperature mode under the typical working conditions. Simulation results illustrate the effectiveness of the multivariable optimization and smooth switching control for the VCE, for the turbine outlet temperature is reduced by 6.08% and 7.08% respectively without and with engine degradation.
