针对某型火箭弹高原使用时弹道失稳现象,文中根据飞行试验实测结果与理论计算对比,分析了火箭弹静、动稳定性影响因子,研究指出了卷弧翼的马格努斯效应是影响火箭弹高原飞行失稳的主要原因,并提出了火箭弹的直尾翼改型设计方案。计算结果表明,改型设计的直尾翼的马格努斯效应比卷弧翼降低80%左右,经试验验证,直尾翼火箭弹满足高原飞行稳定性需求。

In view of trajectory instability occurs to a typical rocket used on plateau, by comparison of theory calculation with the result of actual test, the influence factors of rocket static stability and dynamic instability were analyzed, the Magnus effect of wraparound fins was considered as the trajectory instability, and the straight fins of the rocket was designed in this paper. According to the result, Magnus effect of the straight fins is reduced 80% compared with the wraparound fins. By plateau testing, the rocket with straight fins could be used in high altitude areas.