Global integration design method of acceleration and deceleration control schedule for variable cycle engine

Variable Cycle Engine (VCE) serves as the core system in achieving future advanced fighters with cross-generational performance and mission versatility. However, the resultant complex configuration and strong coupling of control parameters present significant challenges in designing acceleration and deceleration control schedules. To thoroughly explore the performance potential of engine, a global integration design method for acceleration and deceleration control schedule based on inner and outer loop optimization is proposed. The outer loop optimization module employs Integrated Surrogate-Assisted Co-Differential Evolutionary (ISACDE) algorithm to optimize the variable geometry adjustment laws based on B-spline curve, and the inner loop optimization module adopts the fixed-state method to design the open-loop fuel–air ratio control schedules, which are aimed at minimizing the acceleration and deceleration time under multiple constraints. Simulation results demonstrate that the proposed global integration design method not only furthest shortens the acceleration and deceleration time, but also effectively safeguards the engine from overlimit.