| Citation: | WANG Y L，FENG S，BU C，et al. Stability characteristics of hybrid wing-body aircraft based on virtual flight[J]. Journal of Beijing University of Aeronautics and Astronautics，2023，49（9）：2337-2344 （in Chinese）
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A three-degree-of-freedom wind tunnel virtual flight test system was created in an effort to address the possible stability issues of three-axis kinematic coupling and high angle-of-attack instability presented by the hybrid wing-body aircraft. Based on the dynamic similarity model, longitudinal and transverse open-loop virtual flight tests were carried out to study the stability characteristics of the aircraft. The research results show that there is a three-axis motion coupling phenomenon in both the longitudinal and directional open-loop manipulation of the hybrid wing-body aircraft. Longitudinal manipulation will cause the instability of the limit cycle at high angles of attack. The equilibrium position of oscillation is about 28°, the oscillation amplitude is about 2.56°, and the main oscillation frequency is 0.55 Hz. The aerodynamic force presents unsteady characteristics during the oscillation process; The lateral motion amplitude of the yaw manipulation is the largest, followed by yaw motion and pitch motion.
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