Research on Improving Vertical Target Dispersion of Light Vehicle-Mounted Anti-aircraft Gun Based on Firing Line Stabilization

Light vehicle-mounted anti-aircraft gun has been the important constitute part in air defense system because of high mobility, rapid response and flexible configuration. However, the firing efficiency is greatly reduced due to the disturbance caused by the drastic change of vehicle attitude during continuous firing. To overcome this problem, a technique for improving the vertical target dispersion (VTD) based on firing line stabilization is systematically studied. Taking a light vehicle-mounted anti-aircraft gun for instance, a dynamical model of a vehicle-mounted gun is firstly constructed, by which the vehicle attitude during continuous firing is simulated and validated, and the modified dynamics model is employed to investigate the vehicle attitude change characteristics. Secondly, the structural disturbance is reduced as much as possible by optimizing the structure of the auxiliary frame, decreasing the assembly clearance between chassis and turret, and adjusting the transmission empty return. Finally, the feedforward compensation prediction of the servo control is combined, the firing line is stabilized rapidly by the improved feed-forward control strategy. The result of the 200-m VTD is controlled within the range of 1.6 mil × 1.6 mil which meets the design requirement, and the improvement efficiency is more than 20%, it indicates that the proposed technology is reliable and effective, and is significantly referable for developing newly light vehicle-mounted anti-aircraft gun.