透过NGAD的可控性评估准则研究

doi:10.7527/S1000-6893.2024.30083

Abstract

Abstract:

In recent years， the United States has rapidly promoted the development of the “Next Generation Air Dominance” （NGAD） program， in order to adapt to future high-end information warfare and seize air supremacy. Judging from the exposed conceptual map， various NGAD solutions adopt the wing-body fusion design， canceling the traditional flat tail and vertical tail to pursue the ultimate stealth performance， which however brings severe challenges to the longitudinal and yaw flight control of the aircraft. In this paper， the controllability problems of center of gravity focus matching， yaw static instability， and yaw control efficiency are discussed based on the NGAD layout， and the controllability evaluation criteria such as relaxing the design boundary of the maximum head bow， the limiting ability of the ultimate angle of attack， and the yaw doubling time are proposed， which can provide design support for the overall layout of aircraft with this layout.

Key words: Next Generation Air Dominance (NGAD), relaxed static stability, doubling time, high angle of attack, yaw controllability

CLC Number:

V249.1

Chenggang TAO, Chuanjian LIN, Yujia TIE, Shuna FAN, Tianjiao LIANG. Controllability evaluation criteria research based on NGAD[J]. Acta Aeronautica et Astronautica Sinica, 2024, 45(17): 530083-530083.

Figures/Tables 12

Fig.1

Fig.2

Fig.3

Table 1

Limitation of angle of attack residual

纵向参数^［16］	$I y$ /（kg·m²）	S/m²	c/m
纵向参数^［16］	150 000	62	8
起限迎角值/（°）	8
起限迎角处俯仰力矩系数	-0.1
起始俯仰速率/（（°）·s^-1）	10	20	30
期望斜率	0.059 1	0.014 5	0.000 1
期望穿越迎角/（°）	9.6	14.2	15.7
实际穿越迎角/（°）	14.6

Table 1

Fig.4

Fig.5

Table 2

Fig.6

Fig.7

Table 3

Allowable system delay estimation at different doubling time

参数	数值
$K s y s$	0.5	2	4	8
$T 2$ /s	1.414	0.707	0.5	0.353
$K b c k$	3	4	6	10
可接受系统延时/ms	280	260	160	140
临界稳定延时/ms	460	430	330	240

Table 3

Fig.8

Fig.9

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飞机状态点（马赫数，高度/km）	侧滑角倍幅时间/s
飞机状态点（马赫数，高度/km）	理论	仿真
0.2，100	1.9	2.1
0.9，100	0.76	0.73
1.6，10 500	0.59	0.64
1.6，9 000	0.5	0.52

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Controllability evaluation criteria research based on NGAD

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