| Citation: | YIN Bingxiong, GU Duoduo, CAI Wenzhe, et al. Mode switching control method based on multi-model switching predictive control for novel thrust vector control engine[J]. Journal of Aerospace Power, 2026, 41（4）：20240821 doi: 10.13224/j.cnki.jasp.20240821
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An engine architecture called a multi-companion engine was proposed to address the drawbacks of traditional thrust vector control engines, such as complex structures, heavyweight, and high cost. The engine consisted of a main engine and two companion engines, and the companion engine can introduce air from the compressor outlet of the main engine to form vector multi-thrust points. According to the number of thrust points, it was divided into 0-1-2 modes. However, switching between different modes inevitably led to sudden changes in the primary engine flow rate, resulting in speed fluctuations. In response to the difficulty of ensuring speed stability and poor speed control effect in the traditional control mode switching process, a multi-companion engine’s stable/dynamic component-level model was first established. The multi-model switching predictive controller was designed to convert significant dynamic responses into small-step control. Then, the mode switching controller was designed to switch between different modes of a multi-companion engine, reducing the fluctuation of the main engine speed during the multi-thrust point mode switching process. The simulation results showed that the established mathematical model of the multi-companion engine had a high degree of matching with actual test data. At the maximum ground speed operating point, the designed mode switching controller can effectively maintain the constant speed of the main engine during the switching process. In contrast, the ALQR controller and PID controller generated a speed fluctuation of 200 r/min, successfully verifying the effectiveness of the designed mode switching controller.
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