METHOD OF CONTROLLING THE AERIAL GLIDE BOMB AT WIND Russian patent published in 2019 - IPC F42B25/00 

FIELD: military equipment.

SUBSTANCE: method is based on measuring the flight speed of an aerial bomb using pressure and temperature sensors installed in the nose and side parts of the bomb. According to the information from these sensors, according to the laid-down algorithm, the flight of the bomb is controlled using electric rudders. When an aircraft (AC) reaches the striking distance target area of an aerial bomb (AB) with the help of the on-board systems measure the mutual position of the coordinates of the aircraft and the target (range L and height H). With the help of onboard sensors in AC, the ground speed V and the wind speed are measured. This information (distance to the target L and the speed of the aircraft in the direction of the target V, as well as wind speed) is continuously introduced into the computers that are part of the aiming and navigation complex of AC and AB. Based on the known algorithms, the required deviation of the rudders of the AB is continuously calculated and signals proportional to the deviation of the rudders are fed to the AB actuators. Position of the AB rudders is controlled by feedback sensors connected to the AB rudders. Direction of the bombing is chosen basing on the speed and direction of the wind. At the time of uncoupling AB from AC, the power supply to the rudders from AC stops. After the separation of the AB from the AC, the power supply on the AB is started and the rudders are controlled against it. After starting the current source on AB board, the AB calculator is started. Using the speed sensor installed in the nose of the bomb, the total pressure of the air flow in the direction of the bombs is continuously determined and the speed of the bombs v_i is calculated. Static air pressure in the area of the aerial bomb P_i is determined. For each flight time interval Δt, the vertical component v_yi of the bomb falling speed is determined using the relation v_yi=Δh_i/Δt, where Δh_i – height at which the aerial bomb fell for time Δt, which is determined by the ratio Δh_i=h_i-h_i+1=ln(P_i+1/P_i)R_cT_c/gM, where P_i – atmospheric pressure at height h_i, P_i+1 – atmospheric pressure at height h_i+1 (h_i>h_i+1), M – molar mass of air, g – acceleration of gravity, R_c – universal gas constant, T_c – average air temperature at altitudes h_i and h_i+1. Horizontal component of the bomb flight speed is determined using the ratio v_xi=(v_ik²-v_yi²)^1/2. Corrected value of the bomb speed is calculated using the ratio v_ik=kv_i, where k=v₀/v₁ (v₁ – the first value of the bomb speed after its release from the aircraft, measured by the nose speed sensor). With at least two gas flow sensors installed in the bombs on the left and right of the axis of the bomb, the total pressures of air flows P_pli and P_pri respectively on the left and right sides of the bomb are determined. Using the relations v_il=[2(P_pli-P_i)/ρ]^1/2 and v_ir=[2(P_pri-P_i)/ρ]^1/2, the lateral speeds of the bomb perpendicular to the axis of the bomb under the action of the wind are determined (left – v_il and right – v_ir), the maximum value is selected from them and the direction (right or left) of the offset of the bomb under the action of the wind is determined. Using the relation α_i=arcsin(v_il(ir)/v_xi), the angle α_i of rotation of the horizontal speed of the bomb v_xi under the action of the wind is determined. Using the relation v_xi^Φ=v_xicosα_i, the actual value of the horizontal component of the speed of the aerial bomb in the direction of the target v_xi^Φ is determined. Using the relation ΔS_i^Φ=v_xi^ΦΔt, the distance ΔS_i^Φ, traveled by a bomb to the target for a period of time Δt, is calculated. Continuously, control commands are sent to the electric actuators of the bombs from the calculator of the bomb, which allow the bombs to tilt and turn and to select the speeds v_yi and v_xi such that the bomb falls into the target at a distance S=Σⁿ_i=1 ΔS_i^Φ, where n=H/Δh.

EFFECT: invention can be used to build control systems for aerial bombs for various purposes.

1 cl, 3 dwg