Time-lag underwater ultra-high-speed navigation body stability analysis method

The invention belongs to the field of non-linear hydrodynamic force, and particularly relates to a time-lag underwater ultra-high-speed navigation body stability analysis method, comprising the following steps: 1, acquiring a sliding force simplified model; 2, obtaining a longitudinal motion time lag simplified model according to the sliding force simplified model; and 3, judging the stability ofthe time delay system according to the longitudinal motion time delay simplified model. According to the time-lag underwater ultra-high-speed navigation body stability analysis method, a main reference calculation model can be provided for the stability problem of the time-lag ultra-high-speed navigation body, and the tail sliding force is simplified in the model, and finally the simplified modelof the longitudinal movement of the navigation body with the time-lag effect is obtained. 本发明属于非线性水动力领域，具体涉及时滞水下超高速航行体稳定性分析方法。该方法包括以下步骤：步骤1：获取滑行力简化模型；步骤2：根据滑行力简化模型，得到纵向运动时滞简化模型；步骤3：根据纵向运动时滞简化模型，判定时滞系统的稳定性。本发明提供的时滞水下超高速航行体稳定性分析