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Magnetic survey microsatellite attitude determination method based on simplified self-adaptive filter

An adaptive filtering and micro-satellite technology, which can be used in measuring devices, measuring angles, mapping and navigation, etc., and can solve the problems of low orbit determination accuracy and long time consumption.

Inactive Publication Date: 2010-10-06
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0004] However, in view of the variability of the geomagnetic field, the limitation of the accuracy of the magnetometer itself, and the performance limitation of the onboard computer, the orbit determination accuracy of satellite autonomous navigation using a single magnetometer is generally low and takes a long time

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  • Magnetic survey microsatellite attitude determination method based on simplified self-adaptive filter
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  • Magnetic survey microsatellite attitude determination method based on simplified self-adaptive filter

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Embodiment Construction

[0046] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:

[0047] In the present invention, the magnetometer is used as a basic attitude device to provide long-term low-precision attitude information; when the energy source on the satellite is in short supply or in a certain unsafe state, the magnetometer provides basic information to maintain the life of the satellite.

[0048] 1. Orbit calculation of magnetic micro-satellites

[0049]Microsatellites use GPS as the sole source of orbit information, providing high-precision orbit information throughout the day. The output frequency of GPS is 1Hz. Since the attitude output frequency is as high as 10Hz, or when the GPS is not available due to insufficient visible stars, it is necessary to predict the orbit information, and the J2 perturbation item is considered in the prediction to ensure sufficient accuracy; because the GPS output position and velocity Information, for th...

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Abstract

The invention discloses a magnetic survey microsatellite attitude determination method based on a simplified self-adaptive filter, comprising the following steps of: firstly, establishing a satellite attitude motion model; secondly, improving a magnetometer measurement model; thirdly, measuring the self-adaptive correction of a noise model; and fourthly, calculating the filter. The invention simplifies the calculation on a filter grain array on the basis of analyzing and improving the magnetometer measurement model. Under the condition of not obviously influencing precision, the invention remarkably lowers the calculation amount; mathematical simulation indicates that the algorithm is effective; and a three axis magnetometer attitude scheme can meet the requirement for moderate attitude precision. The invention has favorable engineering significance and application potential.

Description

technical field [0001] The invention relates to a method for determining the attitude of a magnetic micro-satellite, in particular to a method for determining the attitude of a magnetic micro-satellite based on simplified adaptive filtering. Background technique [0002] Micro-satellite technology is a hot spot in current international space technology research. Microsatellites have unique advantages such as flexible launch, low cost, high functional density, and short development cycle. Developed countries are at the forefront of this technology field, and both civilian and military fields benefit from it. The geomagnetic field is a special natural resource in the medium and low orbit environment. The three-axis magnetometer has the advantages of small size, light weight, low cost, reliable performance, and no field of view limitation, and can provide all-weather, real-time continuous autonomous The navigation information and the magnetic torque device that interacts with ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C1/00G01C21/00
Inventor 华冰郁丰程月华熊智康国华
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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