斜切尾翼弹引信外弹道计转数定距原理可行性

Fin-stabilized Projectile Revolution Counting for Determining Distance

针对引信计时定距方法精度受弹丸初速影响大的问题,提出斜切尾翼弹引信外弹道计转数定距方法。该方法对初速变化造成的定距误差可忽略不计,弹丸无需膛口测速。数值计算结果表明,弹重和射角变化对计转数定距精度影响很小,但尾翼斜切角变化的影响较大。尽可能加大尾翼斜切角可提高计转数定距精度,并降低尾翼斜切角制造误差对定距精度的影响。低转速弹丸计转数定距原则上只适用于杀伤威力较大的中大口径弹丸。

Aiming at the problem that the ranging and timing precision are quite influenced by initial velocity of projectile while the fuze uses the method of determining distance by counting time,a method of determining distance by counting revolution for fuze of fin-stabilized projectile with beveled fin in exterior ballistic trajectory was proposed.The error of determining distance caused by the variation of velocity could be ignored by using this method,and the initial velocity of projectile need not be measured.The results of numerical calculation indicated that variations of the mass of projectile and firing angle have very small effects on precision of determining distance by counting revolution,but the effect of the angle variation of beveled fin was larger.By increasing the angle of beveled fin as large as possible could improve the precision of determining distance by counting revolution and lower the effect of manufacturing error of the angle of beveled fin on the precision of determining distance.Determining distance by counting revolution of low rotation speed projectiles could only be applied to？medium？and？large？caliber projectiles which the lethality was relatively large in principle.