A Projectile Roll Angle Estimation Method Based on Sun Azimuth

A technology of roll angle and sun altitude angle, which is used in measuring devices, measuring angles, surveying and navigation, etc., and can solve the problems of not giving attitude calculation methods and lack of introduction of calculation models.

Active Publication Date: 2019-01-18
JINLING INST OF TECH
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Problems solved by technology

[0004] At present, in the foreign shooting range flight tests introduced in the existing literature, the sun image indicator sensor is often used to provide angular position and angular velocity as reference information, but the solution model is rarely introduced, and the shell flight test is carried out based on the principle of solar azimuth angle , but does not give the method of attitude calculation

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  • A Projectile Roll Angle Estimation Method Based on Sun Azimuth
  • A Projectile Roll Angle Estimation Method Based on Sun Azimuth
  • A Projectile Roll Angle Estimation Method Based on Sun Azimuth

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[0052]In order to deepen the understanding of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, which are only used to explain the present invention and do not limit the protection scope of the present invention.

[0053] The sun orientation sensitive module is mainly composed of optical slits, photosensitive devices, comparators and other devices and circuit modules. By designing the shape of the light slit and the placement position and angle of the photosensitive device, the viewing angle of sunlight measurement can be controlled. The projectile rotates around its axis in the air, and the photosensitive device measures the light to output a continuous level signal, but there is a significant level difference between the direct sunlight and the non-direct sunlight on the photosensitive device. Use the level difference to set the threshold of the comparator, and then use the ou...

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Abstract

The invention belongs to the technical field of bullet roll angle measurement, and concretely relates to a sun direction-based bullet roll angle estimating method. After a sun direction-based bullet roll angle estimating principle is provided, a view field center angle variable sunshine visual model is established, and an optical measurement application method and design steps comprising optical measurement parameter design, optical measurement time window acquiring, roll angle estimation and roll angle estimation error analysis are provided according to the shooting direction of a practical shooting range and the test time, and whole trajectory flight test shows that the sun direction-based bullet roll angle estimating method is feasible. The above research result provides an effective solving method for references.

Description

technical field [0001] The invention belongs to the technical field of projectile roll angle measurement, in particular to a projectile roll angle estimation method based on sun azimuth. Background technique [0002] The measurement of projectile roll angle is one of the key technologies of ballistic correction projectile. At present, there are many methods for measuring the attitude angle of projectiles, including satellites, gyroscopes, accelerometers, magnetic detection, and solar azimuth angles. However, there have always been many difficulties in measuring the roll angle of high-spin projectiles. The rotational speed is as high as 150-300r / s, and the launch overload is as high as 8000-18000g. The inertial sensor cannot meet the requirements of large range, high overload resistance and proper accuracy. Due to the limitation of the projectile volume, domestic scholars are still studying the single-antenna satellite attitude angle measurement method. In order to overcome...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C1/00
CPCG01C1/00
Inventor 吴有龙曹鹏杨忠孙罡
Owner JINLING INST OF TECH
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