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Monitoring method for satellite integrity based on assistance of dynamical model

A dynamic model and integrity monitoring technology, which is applied in the field of fault diagnosis and integrated navigation, can solve problems such as availability limitation, communication interference, and high cost of external monitoring methods, and achieve strong autonomy, low use cost, and improved monitoring performance. Effect

Inactive Publication Date: 2016-07-13
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

[0004] The technical problems to be solved by the present invention are: the integrity of the satellite navigation system is insufficient during use, the cost of the external monitoring method is relatively high, and the communication has been interfered or there is an area not covered by the signal; the receiver is autonomous in the internal monitoring method. The availability of integrity monitoring methods is limited by the number of visible satellites

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  • Monitoring method for satellite integrity based on assistance of dynamical model
  • Monitoring method for satellite integrity based on assistance of dynamical model
  • Monitoring method for satellite integrity based on assistance of dynamical model

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Embodiment Construction

[0016] The invention will be further described in detail below in conjunction with the drawings.

[0017] The structural block diagram of the method of the present invention is as follows figure 1 As shown, a satellite integrity monitoring method based on the assistance of dynamic model is established by establishing a dynamic model of a moving carrier, and comprehensively using other navigation sensors on board, adopting a multi-model filtering framework and a multi-solution separation method to achieve inertia / The optimal fusion of dynamic model / satellite navigation system information and the fault detection and isolation of the satellite navigation system ensure the integrity of the satellite navigation system and improve the accuracy and reliability of the integrated navigation system. The specific steps are as follows:

[0018] The first step: firstly establish the dynamic model of the carrier. The dynamic model of the carrier contains a series of nonlinear, coupled, ordinary...

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Abstract

The invention discloses a monitoring method for satellite integrity based on assistance of a dynamical model, belonging to the technical field of integrated navigation and fault diagnosis. According to the monitoring method provided by the invention, the dynamical model of a motion carrier is utilized to be combined with the other carried navigation sensors, for realizing the monitoring for the autonomous integrity of a user terminal of a satellite navigation system. According to the monitoring method provided by the invention, a multi-model filtering frame is adopted for realizing the fusion and state estimation for information of an inertia / dynamical model / satellite navigation system; a multi-solution separation method is adopted for realizing the detection and separation for satellite fault; no external equipment is required; the integrity monitoring capacity of satellite navigation system can be promoted; the navigation precision and reliability of the carrier can be ensured; the monitoring method has the characteristics of low cost, strong autonomy, and the like.

Description

Technical field [0001] The invention relates to a satellite integrity monitoring method assisted by a dynamic model, which belongs to the field of integrated navigation and fault diagnosis. Background technique [0002] The satellite navigation system has all-weather high-precision speed measurement, timing and positioning capabilities. It has been widely used to solve the positioning and navigation problems of air, land and sea vehicles. It has become a major navigation device. However, due to satellite ephemeris, Due to the influence of factors such as star clock error, ionospheric and tropospheric delay, multipath and receiver thermal noise, the positioning error of satellite navigation systems may exceed the range allowed by performance requirements, and the carrier may have blind vision problems when the error exceeds the limit. That is, the problem of positioning integrity. [0003] At present, integrity monitoring is mainly used to ensure the integrity of the satellite navi...

Claims

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Application Information

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IPC IPC(8): G01C25/00
CPCG01C25/005
Inventor 柳敏赖际舟吕品陈文静
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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