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论述了法向过载信号反馈在放宽静稳定性大型客机自动驾驶仪增稳控制中的作用。在自动驾驶仪纵向内回路控制律中引入法向过载信号,构成了国际先进客机的C*控制律构型;反馈系统的输出信号,选用LQR设计方法同时闭合客机纵向的内回路和姿态、油门回路,形成了输出跟踪器,并设计了性能指标与反馈参数。以B707为例,建立了其着陆进近阶段的非线性模型,配平并线性化,用获得的控制律进行数字仿真验证。结果表明,内回路增稳效果良好,C*响应曲线在最佳响应区,姿态响应和速度保持都达到了满意的效果。
The effect of normal overload signal feedback on the relaxation of the stability control of large-capacity passenger aircraft autopilot is discussed. The introduction of the normal overload signal in the autopilot longitudinal loop control law constitutes the C * control law configuration of the international advanced passenger aircraft. The output signal of the feedback system uses the LQR design method to simultaneously close the longitudinal internal loop and attitude of the passenger aircraft, Loop, formed the output tracker, and designed the performance indicators and feedback parameters. Taking B707 as an example, a nonlinear model of landing approach is established. The model is linearized and linearized and verified by numerical simulation with the obtained control law. The results show that the internal loop stabilizes well and the C * response curve achieves satisfactory results in the best response area, attitude response and speed retention.