类HTV-2横侧向稳定性研究

针对HTV-2类飞行器存在的横侧向稳定性差的问题，通过风洞试验、模态分析和参数敏感性分析方法研究了类HTV-2飞行器的横侧向稳定性。研究结果表明：与偏航方向相比，滚转静、动稳定性都更弱，表现为：攻角小于10°滚转方向是静不稳定的；在滚转动态试验中，振动曲线随时间不是呈现收敛趋势，而是出现明显非线性多频谱周期性特征。通过在模型前体布置顺气流纵向绊线促使流动对称转捩的方法，增加了滚转曲线的线性和横侧向稳定性。横侧向模态和参数敏感性分析表明，滚转模态随时间缓慢发散，系统对偏航静稳定性等参数比较敏感。

Study on Lateral Directional Stability of HTV-2 Like Configuration

Wind tunnel tests, stability modal analysis and aerodynamic parameter sensibility analysis are conducted to study the lateral directional stability of HTV-2 like configuration. Wind tunnel test results show that: Compared with yaw stability, the roll is weaker in static and dynamic stability. The roll is  static unstable even in small angles; The roll test curve presents obvious non linearity, multi spectrum, periodic characteristics. Subsequent research adopts longitudinal trips to generate symmetry transition at the fore body of the model. As a result, the lateral stability of the vehicle is apparently improved. Stability modal analysis and sensibility analysis of vehicle stability to aerodynamic parameter carried out in this paper show the roll mode will divergent gradually with time and this system is sensitive to lateral aerodynamic parameters such as derivative of the yaw moment with respect to the angle of slip.