Читать книгу Damaging Effects of Weapons and Ammunition - Igor A. Balagansky - Страница 30

Shots are dependent. The value of nW₁ = 5 ⋅ 0.2 = 1. So, we can use the formula (I.26). Let's put the calculated values from the previous example into the formula

The dependence of the shots always leads to a reduced probability of damaging the target compared to the case of independent shots. This effect is more pronounced with more shots fired and a bigger correlation ratio μ. With a small number of shots (n = 2–4) and relatively small correlation ratio values (μ < 0.5), the correction for the dependence of shots is small and the probability of damaging the target can be calculated as in the case of independent shots. If there are a large number of shots and their correlation is significant, correction for the dependence of shots should be taken into account.

An extremely important issue in efficiency theory is to establish a rational relationship between the group error of firing (E_x0, E_y0) and individual or technical dispersion (B_d, B_s). The optimal characteristics of the individual dispersion must be commensurate with the characteristics of the aiming error (E_x0 ≅ В_d); (E_y0 ≅ В_s). Unfortunately, this is not always the case in existing weapon systems; in particular, for artillery weapon systems and small‐caliber unguided aircraft missiles, the group error of firing often far exceeds the individual dispersion.

The optimal ratio between individual and group firing errors can be achieved either by increasing the aiming accuracy or by increasing the individual dispersion of the ammunition. In the practical case of a firing situation, the effectiveness of the firing was increased by up to five times when the technical dispersion was increased to its optimum value without increasing the aiming accuracy.

Another way to increase the effectiveness of the dependent shots, which is widely used for ground artillery, is to shoot with an artificial dispersion of the shots, which is achieved by shooting one target at several aiming positions.