Study On Anti-tank Intelligent Mine Aerodynamic Characteristics And Flight Stability

Anti-tank intelligent mine is a new type of intelligent armor weapon system used to attack top armour of the tank. It can automatically warn, detect, identify and track the target, then carry out attacks at the right time to exert the biggest damage. Aerodynamic characteristic of anti-tank intelligent mine means aerodynamic and moment imposed on the anti-tank intelligent mine in the process of scanning the target. Aerodynamic calculation and flight stability is prerequisite to complete the overall aerodynamic design and research the motion law of intelligent mine. Research in this paper provides theoretical basis for use and development of the intelligent mine from basic principle and performance analysis, eventually improving the overall performance of the intelligent mine.Based on the rigid body dynamics principle, this paper proposes a design of anti-tank intelligent mine launcher. This structure can shoot at predetermined firing angle and ensure that the anti-tank intelligent mine scans the target steadily in the air.Then we use finite element analysis software FLUENT to calculate the aerodynamic force and moment in both the two conditions of mine body doesn’t rotate and mine body rotates. Results show that the value of the drag coefficient is larger for the case of mine body without rotation, which is advantageous to the intelligent mine scan steadily. Drag coefficient increases with the increase of the absolute value of angle of attack. And the drag coefficients of positive and negative angle of attack are symmetrical about 0 degree angle of attack. Intelligent mine’s flow field under different angle of attack changes a lot is the main cause of instability in its flight. For the model of mine body has rotation angular velocity of 35 r s, calculation results show that under the same Mach number, drag coefficient of the mine body with rotation is larger than that without rotation. And drag coefficient has not increased much with the increase of absolute value of attack angle.Finally, this paper analyzes stability of the scanning motion and establishes flight dynamics model of single scanner intelligent mine. We discuss how initial conditions affect the stability of intelligent mine by the help of MATLAB. Results show that the increase in rotation angular velocity can expand the scope of scanning on the premise of scanning motion is stable. Increased pitch angle, pitch angular velocity, yaw angle and yaw angular velocity initial value will lead to scanning optical axis’ tilt increase, and intelligent mine is more and more unstable. This paper provides a reference for optimization of scanning trace of intelligent mine to some extent.