Abstract
For a higher attack accuracy of projectiles, a novel mechanical and electronic video stabilization strategy is proposed for trajectory correction fuze. In this design, the complexity of sensors and actuators were reduced. To cope with complex combat environments, an infrared image sensor was used to provide video output. Following the introduction of the fuze’s workflow, the limitation of sensors for mechanical video stabilization on fuze was proposed. Particularly, the parameters of the infrared image sensor that strapdown with fuze were calculated. Then, the transformation relation between the projectile’s motion and the shaky video was investigated so that the electronic video stabilization method could be determined. Correspondingly, a novel method of dividing sub-blocks by adaptive global gray threshold was proposed for the image pre-processing. In addition, the gray projection algorithm was used to estimate the global motion vector by calculating the correlation between the curves of the adjacent frames. An example simulation and experiment were implemented to verify the effectiveness of this strategy. The results illustrated that the proposed algorithm significantly reduced the computational cost without affecting the accuracy of the motion estimation. This research provides theoretical and experimental basis for the intelligent application of sensor systems on fuze.
Highlights
Trajectory correction fuze is opening a low cost and high profit way to improve attack accuracy for various projectiles [1]
We proposed a novel mechanical and electronic stabilization strategy for trajectory correction fuze on mortar, where the infrared image sensor was designed to provide a stable video output according to target characteristics and mission requirement
To ensure the infrared image sensor always remains stationary with respect to the geodetic coordinate system, by the motor’s control, the mid and forward stationary with respect to the geodetic coordinate system, by the motor’s control, the mid and part of the fuze rotate relatively to the projectile at the same speed
Summary
Trajectory correction fuze is opening a low cost and high profit way to improve attack accuracy for various projectiles [1]. With increasingly complex operational backgrounds and missions, the guidance mode of trajectory correction fuze faces greater challenges In this case, the infrared image sensor is widely used because of its long detection distance, good anti-interference ability and strong concealment. Li [2,3,4] proposed a novel trajectory correction fuze based on an image sensor. Since mortars are often launched from a smooth bore gun, they have a certain amount of micro-spin to keep balance This causes a rotation of the field on the infrared image sensor. We proposed a novel mechanical and electronic stabilization strategy for trajectory correction fuze on mortar, where the infrared image sensor was designed to provide a stable video output according to target characteristics and mission requirement.
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