改善乘坐品质纵向增稳器返馈系数的选择

 根据驾驶员位置处法向加速度反应近似为零的条件,选择了算例飞机的纵向增稳器返馈系数。按文献2、3],估算了乘坐品质的改善情况,且分析了飞机和增稳器组合的动态特性。结果表明:当飞机和增稳器组合的操纵期望参数（CAP）值接近9.81/ι_x时,可满足乘坐品质要求。同时,增稳器的工作范围在平尾总偏角的10％以内。如果平尾的面积相对机翼面积较大,例如,则在分析飞机和增稳器组合的动态特性时,必须考虑升降舵偏转引起的升力项。

SELECTION OF SAS' LONGITUDINAL FEEDBACK COEFFICIENTS TO IMPROVE RIDING QUALITIES

The longitudinal feedback coefficients of a stability augmentation system （SAS） for a sample aircraft were selected in the light of the condition that the normal acceleration response at the pilot's position approximated to zero. With the aid of references 2] and 3] the improvement in riding qualities of the airfrarne/SAS system due to the selected coefficients were evaluated. The dynamic characteristics of the airframe/SAS system were also analyzed.The results demonstrate that the riding qualities are desirable when the control anticipative parameter of the airframe/SAS, system approaches to 9.81/lx, and the operating range of the SAS is limited to the elevator displacement less than 10% of the max.displacement.It is necessary to take into account the lift due to the elevator deflection in the analysis of the dynamic characteristics of the airframe/SAS system, if the tail area is large enough in comparison with the wing area such as 0.2.