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为抑制控制器硬件电路不确定性因素和控制中的内外干扰对涡扇发动机高压转子转速控制的影响,设计了线性自抗扰控制器。线性自抗扰控制器由跟踪微分器、扩张状态观测器和误差反馈控制器三部分组成,跟踪微分器负责安排转速指令过渡过程;扩张状态观测器充分利用转速变化的量测信息,可对转速控制信号的内外部干扰进行观测;误差反馈控制器设计时采用了频域校正方法设计控制器,在补偿扩张状态观测器预估干扰的同时,实现发动机的转速控制。最后对某型涡扇发动机控制系统的仿真结果表明,以上自抗扰控制器具有强鲁棒性和抗干扰性能。
In order to restrain the influence of the uncertainties of the hardware circuit of the controller and the internal and external disturbances in the control on the speed control of turbofan engine rotor, a linear ADRC controller is designed. The linear ADRC controller is composed of tracking differentiator, dilatational state observer and error feedback controller. The tracking differentiator is responsible for arranging the speed instruction transition process. The dilatational state observer makes full use of the measurement information of speed variation, The internal and external disturbance of the control signal is observed. The error feedback controller is designed with frequency-domain correction method to design the controller. While compensating the predicted disturbance of the extended state observer, the speed control of the engine is realized. Finally, the simulation results of a turbofan engine control system show that the above ADRC controller has strong robustness and anti-interference performance.