基于N-dot的涡扇发动机加速控制器设计

Design of Acceleration Controller to a Turbofan Engine Using N-dot Method

针对双转子民用涡扇发动机,进行基于转子加速度的加速控制器设计研究。采用常规的PI控制器结构,针对结构中所需的转子加速度指令,给出了1种满足要求的设计方法,并将PI控制参数的求解过程转化为带约束的非线性优化问题,利用模式搜索算法求解。构建包含稳态控制器和加速控制器的涡扇发动机闭环控制回路,进行加速过程仿真测试。结果表明:所设计的加速控制器满足涡扇发动机加速过程的性能要求,对于工程设计与应用具有一定的参考价值。

Research on the design of acceleration controller using N-dot method is made for a two-spool civil turbofan engine. Based on the PI controUer, an N-dot design method which could fulfill the requirements was given, and a constrained nonlinear optimization problem was proposed to obtain the PI parameters using pattern search algorithm. Then a closed-loop of a turbofan engine control with setpoint controller and acceleration controller both was constructed for acceleration simulation. The results show that the acceleration controller works well in an acceleration process and is of value for engineering application.