Parametric Study on Lateral–Directional Stability of Hypersonic Waverider

Lateral–directional stability is a critical issue for the design of any kind aircraft. For hypersonic waverider, nonaxisymmetric, flat, and slender geometric feature makes it susceptible to problem lateral–directional instability. Therefore, influence on static dynamic waverider studied so as enable designer consider this in preliminary aircraft stage. A series power-law waveriders generated at given space leading-edge parameters. Then, variation derivatives with parameter obtained by use surrogate model. It found that increasing dihedral angle lower surface can improve both lateral directional total waverider. Furthermore, instability mechanisms are analyzed detail based approximate formulas derived from linearized small-disturbance equations motion. Especially, concept Dutch-roll derivative proposed, which plays an important part damping Dutch roll. Finally, also modes, including roll, spiral,