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Motion platform attitude sensing method based on synergy-source direction of arrival (DOA) information

A technology of motion platform and attitude perception, applied in the field of navigation, can solve the problems that affect popularization and application, complex system, large volume, etc., and achieve the effects of cost reduction, large dynamic range, and consistent measurement performance

Active Publication Date: 2013-03-20
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

The disadvantages of this type of method are large volume, low precision, complex system, and slow speed, which affect the popularization and application of this technology.

Method used

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  • Motion platform attitude sensing method based on synergy-source direction of arrival (DOA) information
  • Motion platform attitude sensing method based on synergy-source direction of arrival (DOA) information
  • Motion platform attitude sensing method based on synergy-source direction of arrival (DOA) information

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Embodiment Construction

[0021] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:

[0022] The posture perception method of a moving platform based on cooperative source wave arrival information of the present invention specifically includes the following steps: Step 1, using a receiver fixedly arranged on the moving platform to receive signals transmitted by N different navigation signal sources, and estimate Get the direction of arrival of each navigation signal source in the coordinate system of the moving platform, N is an integer greater than or equal to 2.

[0023] In this step, use the full electromagnetic vector sensor, three orthogonal electric dipoles or three orthogonal magnetic ring pole antennas as receivers to receive navigation signals at a single receiving point; according to the specific communication methods of each signal source, use code division Or frequency division method to distinguish multiple signal sources, a...

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Abstract

The invention discloses a motion platform attitude sensing method based on synergy-source DOA information and belongs to the technical field of navigation. According to the method, a fully electromagnetic vector sensor, three orthogonal electric dipoles and three orthogonal magnetic ring dipole antennas are used for receiving navigation signals at single receiving points, and DOAs of signals (polar and nonpolar) are estimated; different signal sources are distinguished according to code division or frequency division; and an attitude reference is provided for the motion platform through two crossed DOA vector structure coordinate systems, and therefore the motion platform has the attitude reference to complete attitude sensing of itself. When a plurality of satellite signal sources exist, attitude parameters are adjusted finely, and the attitude parameter with the smallest weighted sum of error spherical variances in each DOA is found out, so that a plurality of platform attitude matrixes of the DOA information are mixed. According to the method, only the single receiving points are needed on the motion platform to achieve the attitude sensing, and attitude navigators and heading navigators can be substituted.

Description

technical field [0001] The invention relates to a motion platform posture perception method, in particular to a motion platform posture perception method based on collaborative source wave arrival information, and belongs to the field of navigation technology. Background technique [0002] The attitude information of the motion platform is mostly obtained from the fusion of other information by the inertial navigation sensor. At present, the attitude information system of the motion platform is complex in structure, large in mass and volume, consumes energy, and has a high failure rate. However, the measurement accuracy of the developing miniature inertial navigation attitude information system is not high. [0003] In some aerospace applications, there are special requirements for attitude navigation, such as fast measurement speed, high precision, small volume, mass, and energy consumption, resistance to large acceleration, radiation, extreme temperature, and vibration. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/53
Inventor 陈广东王学孟张凯何敏
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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