Research On A Trajectory Correction And Control Method

It is a problem that based on the conventional development on a kind of intelligent for some kind of "one-dimensional correction". When the deviation is greater than direction, you can "firing in the distance, take into that place" with a damping device, so as to achieve the purpose of the point spread. This paper focuses on a type of large diameter to the one dimensional trajectory correction projectile.At present the most popular about one dimensional correction mechanism class five kinds:iris damper, paddle type damper, D type damper, three petal type damper, and flexible fabric umbrella damper. Three petal type damping apparatus has simple structure design, drive reliable and suitable for mass production, at the sane time, damping rings into place after can get larger radial expansion area, the range has a strong ability of modified; For correction projectile rotating type, fixed spread is use of centrifugal force to drive; For non rotating type correction projectile, the correction institutions opening is use of energy storage to drive energy. Therefore, this paper study three petal type damper as a type of large diameter one-dimensional correction projectile correction mechanism."The projectile with correct of one dimensional " is a kind of ammunition with semi intelligent and is based on the development of conventional ammunition. Its characteristic is that the range of trajectory is more far than the direction of trajectory, so it correct the trajectory only range, and don’t contain the direction. If the drag brake is the main part of correction mechanism, the principle with correct trajectory is that "the aiming point is more far than the target point".In front of the fire, to evaluate the extended range for one dimensional trajectory correction projection according to the correction ability of correct projectile,the index of intensity, the average range, target range and so on, then determine the aiming point. The distance can adjustment by the velocity and angle of shooting. In the process of the projectile flying in the air, measure the spatial orientation by the navigation technology. According to this data from the navigation, can calculate the drop-point of the trajectory If the drop-point beyond the target, we can modify it, otherwise needn’t modify it.This paper set about from conventional ammunition air characteristics,studied the working principle of the correction mechanism of drag brake, also studies the air characteristic of drag brake, then built mathematical model of the one-dimensional correct projectile. Before the shooting, need clear the control process of correction trajectory, also need to know its preparation. The research of extended range is the primary task in a one-dimensional correction, we can find the shot point after calculate the extended range. When the projectile flying out of the muzzle, the projectile can be positioned at the navigation technology for "GPS+BDS". The date need be processed because the data from the navigation may not equal to the real date. In the paper, the date will be processed by the Kalman filter. Then calculate the drop-point. It will direct impact on the projectile correction results that when to free the drag brake. It is easy to calculate by genetic algorithm.The end of the paper, for a certain type of large diameter with one-dimension ballistic to simulation by Navigation signal simulator with GNS-8220, receive the navigation signal by Navigation receiver. At last, will be the data of Navigation receiver to compare the real data. The results showed it is feasible to simulation the ballistic trajectory by Navigation signal simulator with GNS-8220 and receive the position and speed information about ballistic trajectory by Navigation receiver. These theoretical can be become the foundation on shoot at out-station.