| Trajectory correction projectile as a kind of precise strike ammunition was put forward and developed rapidly during 1980's. Compared with shrapnel, mortar projectile, rocket projectile and other conventional ammunition, the new projectile with trajectory correction can shoot straight, and has higher campaign consumption ratio. The trajectory correction projectile is one of the main direction for modern ammunition developing.CCD is a part of the trajectory correction projectile based on image recognition which can seek, lock and attack the target automatically. The CCD image definition would be influenced by projectile rotation, which also can influence the identify precision of the seeker. Thus, decreasing the influence of projectile rotation on CCD image quality is necessary.Projectile-mounted stabilized platform for rotation is a closed loop servo system connected with CCD. Drived by motor, CCD can roll as fast as the projectile in the opposite direction, keep stationary relative to the target, and reach the aim of decreasing eddy. In order to carry out the project above, the roll attitude of the flying body must be calculated first, because the rotation angle is one of the most important parameters to the control system.The research on key techniques of the projectile-mounted rotation stabilized platform in this paper bases on of rocket projectile. A means of roll attitude arithmetic is put forward, using geomagnetism detection. Hardware design for projectile roll attitude detective system has been given. The validity of this prototype was validated by experiment. Mathematical model of stabilized platform system has been described and control system simulation has been done. SCM has been regarded as control center, and the control program is compiled in C language. The feedback control is realized by coder which is used for measuring angle.Feasibility of this stabilized platform system is validated by experiment on prototype, which can be used as a base for engineering application. |
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