针对"在台架试验中用于带转航空发动机的空气起动系统在起动时存在一定常阶跃扰动,造成空气起动机带转航空发动机至点火转速时间过长,导致起动失败,而常规PID反馈控制无法消除扰动"的问题,提出了前馈补偿的方法.首先通过系统辨识方法获得对象及扰动的传递函数,设计了基丁两者模型的动态前馈补偿控制器,并与PID反馈控制器组成了复合控制器.实际使用结果表明,前馈-反馈复合控制器使空气起动机进口压力上升时间减小了6 s,极大提高了系统的抗扰动特性,保证了发动机的顺利起动.%Aiming at the air starting system for starting aero engine had a steady step disturbance in the test, it caused the aero engine to arrive the ignition rotational speed time to grow, thereby the aero engine started failure, but the general PID feedback controller could not eliminate the disturbance, a method was presented to feedforward compensation. First, the transfer function of the object and disturbance was obtained by the means of system identify. Then, according to their model, a dynamic feedforward compensation controller was designed, it and PID feedback controller composed the composite controller. The actual use result indicate that the feedforward-feedback composite controller makes the rising time of the inlet pressure to decrease 6 s, it greatly improves the system features to resist disturbances, and ensures the engine starting smoothly.
展开▼
