Research On The Application Of Direct Lateral Force

The main works of this thesis are research of the direct lateral force's application, on the exoatmosphere kinetic-kill vehicle and on the inner-atmosphere airdefence missile. The main works and achievements are described:(1) The application of direct lateral force on the exoatmosphere kinetic-kill vehicle.At first, the collectivity project of the exoatmosphere kinetic-kill vehicle is specified, the motive model of the exoatmosphere kinetic-kill vehicle and target are constructed, and the thrust performance of trajectory-control engine and attitude-control engine are presented. According to the method of implementing the guidance law and the need of seeker, the control laws of trajectory and attitude control are designed. The terminal guidance procedure is simulated, and the results validated the capability of the exoatmosphere kinetic-kill vehicle to hit the target directly.(2) The application of direct lateral force on the inner-atmosphere airdefence missile.a. Aimed to solve problem of airdefence missile end control invalidation, a new idea of building direct lateral force control in terminal trajectory is presented, and the optimal action position, mode and range are analyzed. At the same time, the example of applying the direct lateral force-ERINT-1 (America)- is analyzed and compared.b. From analyzing the side, lobe, the angular velocity of sight line of autoloading seeker, and the response delay of missile, the main reasons of airdefence missile end control invalidation are made sure. According to the state of seeker before it work failed, the signal of end controlling is built.c. Based on a lot of referenced documents and tunnel experiment data, the phenomenon of lateral jet interception are analyzed, and the diagrams of the interaction factor 'Kcn' is presented. Following, the airdefence Missile model, trajectory model including attitude-control direct lateral force are constructed.d. In the end of this thesis, on the basis of the mathematical model, three segments of trajectory: the vertical turn, the PN guidance and the direct lateral force control in terminal trajectory are simulated. The results show that with the direct lateral force control reduces in terminal trajectory, the miss-distance is reduced and the precision is improved.