Research on acceleration control schedule for turbofan engine based on equal relative rotational acceleration reverse method

Existing design methods for acceleration control schedules focus only on acceleration time, neglecting significant overshoot and fluctuation in thrust at the end of acceleration, which can adversely affect actual flight. To achieve better actual flight effects, this study aims to develop an improved acceleration control schedule that simultaneously minimizes acceleration time while controlling end-of-acceleration disturbances. Toward this goal, the Equal Relative Rotational Acceleration Reverse Method (EARM) is proposed. Initially, the Dynamic Steady Reverse Model (DSRM) is established to achieve dynamic performance simulation of the target rotational acceleration and speed. Then, the Search Enhancement Strategies-Chaotic Particle Swarm Optimization (SES-CPSO) algorithm is introduced to tackle the complex optimization problems associated with the DSRM. Based on the above two, by coordinately planning the dual rotor acceleration process, an optimization of multiple control variables is conducted to obtain a multivariable control schedule. Simulation results show that under the condition of H = 0 km, Ma = 0, compared with the schedule designed by the Transient-state Reverse Method (TRM), acceleration time is reduced from 3.86 seconds to 3.71 seconds, a reduction of 4.04%, and thrust overshoot is reduced from 2.76% to 0.665%, a reduction of 75.91%. It is concluded that the proposed method can effectively reduce the fluctuation and overshoot of rotational speeds and thrust at the end of acceleration while minimizing the acceleration time.