Switching control of thrust regulation and inlet unstart protection for scramjet engine based on strategy of integral initial values resetting

A new switching control strategy has been developed to deal with the multi-objective control problem of scramjet engine, which caused by its many safety restrictions during the ascent process. This switching control method is based on the strategy of integral initial values resetting. Firstly, in this paper, the model of each control loop and sub-controller was given on the basis of previous studies. Then the switching criteria and bumpless switching scheme were described separately and the influence of the key parameters of the switching criteria on the control process was discussed using the hardware-in-the-loop simulation. Finally, the validity of switching control was verified on the ground experiment facility. The results showed that it is useful to introduce the switching control based on the strategy of integral initial values resetting to scramjet engine.