A detection system and method for projectile roll angle based on geomagnetism and solar angle

Abstract

The invention discloses a missile body rolling angle detection system and method based on geomagnetism and sunlight angle. The system comprises four photosensitive tubes, a geomagnetic measurement module, a GPS module and a controller, wherein the geomagnetic measurement module, the GPS module and the controller are arranged in a missile body in sequence from top to bottom; the geomagnetic measurement module is located at the top of the bullet of the missile body, and the four photosensitive tubes are uniformly embedded in the outer wall of the missile body in the circumferential direction; and the output end of geomagnetic measurement module, the output end of the GPS module and the output ends of the four photosensitive tubes are connected with the input end of the controller. Accordingto the system and the method, the detection of missile body rolling angles can be realized without using a gyroscope and an accelerometer; and the structure is simple, and the cost is low.

Description

technical field [0001] The invention relates to a system and a method for detecting the roll angle of a projectile, in particular to a system and a method for detecting the roll angle of a projectile based on geomagnetism and sunlight angle. Background technique [0002] The fixed-wing double-rotor projectile that can complete the guidance task has been the research hotspot of guided projectiles in recent years. This type of projectile is equipped with a control system on the traditional rifled gun or mortar to enable it to have navigation capabilities, and it is better than other guided projectiles in the same application. Ammo costs less. This type of shell has no power device, and the launch acceleration exceeds 10000g. [0003] The roll angle detection of the fixed-wing double-rotating projectile is the basis of projectile navigation and trajectory control. Roll angle detection is generally measured using a combination of gyroscopes and accelerometers. However, due to...

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Problems solved by technology

However, due to the ultra-high acceleration of the projectile, the mems gyroscope and accelerometer will be damaged during the launch process, and the fiber optic gyroscope is too expensive, and the cost of the accelerometer resistant to high acceleration is also very expensive, which violates the fixed-wing dual-rotation The original intention of bomb design

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