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针对FADS系统引气管路压力传递存在的延迟误差,采用波动方程理论根据变管径引气管路的物理模型建立了压力传递的数学建模,对由不同直径、长度的管路串联而成的变管径引气管路压力传递延迟特性进行了仿真分析,获得了不同直径、长度的仿真分析结果。最后,提出了基于卡尔曼滤波器的变管径管路压力传递延迟补偿算法。计算机模拟试验的结果表明,引气管路压力延迟补偿算法可减小引气管路压力传递延迟时间、有效补偿压力传递延迟误差。
Aiming at the delay error of the pressure transmission in the bleed air line of FADS system, the mathematical model of pressure transfer is established according to the physical model of the variable diameter bleed air line by using the wave equation theory. For the pipeline with different diameter and length, The pressure propagation delay characteristics of the pipe diameter of the gas pipeline were simulated and the simulation results of different diameters and lengths were obtained. Finally, the Kalman filter is proposed to compensate the pressure drop of the variable-diameter pipeline. Computer simulation results show that the air line pressure delay compensation algorithm can reduce the pressure transmission delay time of the bleed air line and effectively compensate the pressure transmission delay error.