关键词: 下一代空中主宰（NGAD）, 放宽静稳定性, 倍幅时间, 大迎角, 航向可控性

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