关键词: 定距空炸引信, 正交试验, 导程, 内弹道

Abstract: In order to meet the needs of modern urban combat and terminal air defense precision damage, and to further improve the ranging accuracy of airburst munitions, the study employs a modified prime ballistic equation to analyze the influence mechanism and factors affecting ranging accuracy by counting the number of projectile revolutions. An orthogonal test is used to simulate nine factors and levels within the ballistic model, revealing that variations in lead caused by rifling manufacturing tolerances, rifling type, and wear are critical yet overlooked factors in existing ranging algorithms. To address the impact of lead on ranging accuracy, the study proposes an innovative equivalent lead calculation method. This method defines the equivalent lead as the ratio of projectile velocity to rotational speed, calculated using an internal ballistic model. Importantly, the model incorporates the effects of rifling type and wear. Simulations of the internal ballistic model demonstrate that the equivalent lead differs from the theoretical lead by an average of approximately 3%. Furthermore, the accuracy of the equivalent lead is validated through simulations of the ranging algorithm, showing a significant improvement in precision. Specifically, at a fixed distance of 1000 m, the use of equivalent lead to determine the number of loading revolutions results in an average increase in ranging accuracy of 32.9 m.

Key words: ranging airburst fuze, lead, orthogonal experiment, internal ballistic