A Fast Correction Method for Inertial Navigation Errors Used in Airborne Communication in Motion

A technology of communication and error in motion, applied in the field of navigation, can solve the problems of low data rate and poor precision of MEMS inertial navigation, etc., to achieve the effect of ensuring control accuracy, reducing attitude drift, and ensuring long-term navigation accuracy

Active Publication Date: 2018-02-06
BEIJING INST OF AEROSPACE CONTROL DEVICES
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Problems solved by technology

[0004] The technical problem solved by the present invention is: to overcome the deficiencies in the prior art, and to provide a method for correcting MEMS inertial navigation errors in motion with airborne inertial navigation information, taking into account the respective differences between MEMS inertial navigation and airborne inertial navigation. The advantage of learning from each other's strengths, it better solves the problem of low data rate of airborne inertial navigation and poor accuracy of MEMS inertial navigation, can quickly estimate the zero bias of MEMS gyroscope, and correct the attitude error of MEMS inertial navigation, so that the energy of MEMS inertial navigation can be long Time to meet the airborne mobile communication control requirements, more suitable for precise control of antenna pointing

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  • A Fast Correction Method for Inertial Navigation Errors Used in Airborne Communication in Motion
  • A Fast Correction Method for Inertial Navigation Errors Used in Airborne Communication in Motion
  • A Fast Correction Method for Inertial Navigation Errors Used in Airborne Communication in Motion

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Embodiment Construction

[0019] like figure 1 Shown is the flowchart of the method of the present invention. The method of the invention uses the precise navigation information of the airborne inertial navigation to correct the navigation error of the MEMS inertial navigation.

[0020] The main steps of the inventive method are as follows:

[0021] (1) When the airborne inertial navigation information is valid, obtain the navigation information of the airborne inertial navigation, including the azimuth ψ of the carrier p , pitch angle θ p , roll angle γ p , according to the azimuth ψ p , pitch angle θ p , roll angle γ p Get the attitude matrix of the airborne inertial navigation Attitude Quaternion Q 0 .

[0022] The effective time of the navigation information of the airborne inertial navigation here refers to the time when the transmission of a frame of navigation attitude data transmitted from the airborne bus to the communication system in motion is completed.

[0023] How to get from t...

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Abstract

The invention discloses a rapid inertial navigation error correction method for onboard satellite communication in motion. The rapid inertial navigation error correction method is a method for correcting MEMS inertial navigation information of antennas for onboard satellite communication in motion by virtue of onboard high-precision navigation information. Onboard high-precision navigation data is broadcasted by an onboard bus, is relatively high in precision but is long in time interval, so that the onboard high-precision navigation data cannot meet control requirements of the antennas for the satellite communication in motion. MEMS inertial navigation data is relatively high in velocity and but is relatively low in precision, so that the MEMS inertial navigation data cannot meet control requirements of the satellite communication in motion. According to the method, MEMS inertial navigation errors are corrected at regular intervals by virtue of the onboard inertial navigation information, so that the requirements of the satellite communication in motion on the control precision and the time interval of attitude data can be simultaneously met, and meanwhile, the rapid calibration of the gyro zero position in the MEMS inertial navigation is realized.

Description

technical field [0001] The invention belongs to the field of navigation and relates to a method for correcting inertial navigation errors of airborne communication in motion. Background technique [0002] The mobile communication application of geosynchronous satellites is commonly known as "Mobile Communication", which is an application with strong demand and rapid development in the field of satellite communication. In addition to the advantages of wide satellite communication coverage, no terrain and geographical restrictions, and stable and reliable transmission lines, "Mobile Communication" has truly realized the purpose of broadband and mobile communication. [0003] The aircraft is equipped with an airborne inertial navigation system and a mobile communication system, and the mobile communication system itself includes a MEMS inertial navigation system for antenna pointing control. For the two types of inertial navigation, the airborne inertial navigation has high ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/16
CPCG01C21/16
Inventor 门吉卓于清波赵书伦
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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