CN-122017890-A - Navigation management method and device based on deception perception

CN122017890ACN 122017890 ACN122017890 ACN 122017890ACN-122017890-A

Abstract

The embodiment of the specification discloses a navigation management method based on deception perception, which comprises the steps of obtaining information of interest, wherein the information of interest comprises signal power, attitude and direction of GNSS satellites, calculating deception offset vectors according to the information of interest, mapping the deception offset vectors into eccentric quantities distributed by non-central chi-square, calculating detection statistics, calculating miss probability according to the detection statistics, forming probability quality functions according to space direction statistics of detected deception signals, calculating space entropy according to the probability quality functions, calculating integrity weight loss according to the space entropy, calculating position error expectation, obtaining overrun probability according to the position error expectation, determining minimum protection level meeting constraint according to the integrity weight loss, the miss probability and the overrun probability, and determining navigation processing strategies according to the minimum protection level meeting constraint.

Inventors

Gong boyuan
Hu Piying
Guo jiuyuan
ZHANG ZIWU

Assignees

中国商用飞机有限责任公司北京民用飞机技术研究中心
中国商用飞机有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260212

Claims (10)

1. A navigation management method based on spoofing awareness, the method comprising: Acquiring information of interest, wherein the information of interest comprises signal power, attitude and direction of a GNSS satellite; calculating a spoofing offset vector according to the information of interest, and mapping the spoofing offset vector into eccentric amounts distributed by non-central chi-square; Calculating detection statistics, and calculating the missing detection probability according to the detection statistics; Counting the detected deception signals according to a space direction to form a probability quality function, calculating a space entropy according to the probability quality function, and calculating integrity weight loss according to the space entropy; calculating a position error expectation, and obtaining an overrun probability according to the position error expectation; and determining a minimum protection level meeting the constraint according to the integrity weight loss, the omission ratio and the overrun probability, and determining a navigation processing strategy according to the minimum protection level meeting the constraint.
2. The method of claim 1, wherein determining a minimum protection level that satisfies a constraint based on the integrity weight loss, the miss probability, and the overrun probability comprises: and inputting the integrity weight loss, the missing detection probability and the overrun probability into an effective integrity loss upper limit model, and solving the minimum protection level meeting the constraint.
3. The method of claim 1, wherein solving for a minimum protection level that satisfies a constraint comprises: and solving a minimum protection level meeting the constraint by the effective integrity loss upper limit calculation model under a preset integrity risk upper limit.
4. A method according to any one of claims 1 to 3, wherein determining a navigation processing strategy from the minimum protection level that satisfies a constraint comprises: and if the minimum protection level meeting the constraint does not exceed the threshold value, maintaining the current navigation solution.
5. A method according to any one of claims 1 to 3, wherein determining a navigation processing strategy from the minimum protection level that satisfies a constraint comprises: and if the minimum protection level meeting the constraint exceeds a threshold value, performing navigation warning.
6. The method of claim 5, wherein performing a navigational alert comprises: and outputting alarm information to the flight management system.
7. The method of claim 1, wherein the method further comprises: and judging whether a deception signal is received according to the detection statistic.
8. The method of claim 1, wherein the GNSS satellite signal power, GNSS satellite attitude and GNSS satellite direction are obtained from a GNSS receiver, an inertial measurement unit, a multi-antenna array, respectively.
9. The method of claim 1, wherein the spoof offset vector is calculated by a pre-constructed spoof offset vector model; And/or the number of the groups of groups, The detection statistic is calculated through a pre-constructed detection statistic model.
10. A fraud awareness based navigation management device, the device comprising: The data acquisition unit is used for acquiring the information of interest, wherein the information of interest comprises the signal power, the gesture and the direction of the GNSS satellite; The fusion calculation unit is used for calculating a deception offset vector according to the information of interest, and mapping the deception offset vector into eccentric quantity distributed in a non-central chi-square manner; Calculating detection statistics, and calculating the missing detection probability according to the detection statistics; Counting the detected deception signals according to a space direction to form a probability quality function, calculating a space entropy according to the probability quality function, and calculating integrity weight loss according to the space entropy; calculating a position error expectation, and obtaining an overrun probability according to the position error expectation; And the integrity decision and alarm output unit is used for determining the minimum protection level meeting the constraint according to the integrity weight loss, the omission factor and the overrun factor, and determining the navigation processing strategy according to the minimum protection level meeting the constraint.

Description

Navigation management method and device based on deception perception Technical Field The application relates to the field of global satellite navigation system signal safety and integrity protection, in particular to a navigation management method and device based on deception perception. Background GNSS systems are widely applied to the fields of aviation, navigation, land navigation and the like, but GNSS signals are easy to attack by deception signals, and the navigation safety is seriously affected. Most current GNSS protection level computing schemes still employ a fixed protection level under fraud conditions or are based solely on geometric/noise models, without dynamically coupling the fraud strength (i.e., non-centrality of measurement offset) to the protection level, resulting in a difficult to effectively control risk of integrity failure. In addition, in the prior art, the deception detection is mostly performed by calculating the dual-antenna carrier phase difference value, such as CN117075150a, a dual-antenna carrier phase deception detection method based on DBSCAN clustering algorithm, and CN113031021a, a satellite navigation directional device deception interference detection method based on carrier mutual difference, and the deception signal detection is not associated with the GNSS protection level. And these prior art schemes are only suitable for spoofing signal detection, do not dynamically couple the detection results with the GNSS protection level, and even if signal anomalies are detected, lack an inverse solution mechanism that systematically maps the detection statistic results to position tolerance (PL), resulting in alarm and navigation decision-making disjoints. Disclosure of Invention The embodiment of the specification provides a navigation management method and device based on deception perception, which are used for solving the technical problems of realizing real-time evaluation calculation of navigation safety limit and navigation management under the condition that deception signal attack exists during the operation of a aviation. In order to solve the technical problems, the embodiment of the specification provides the following technical scheme: the embodiment of the specification provides a navigation management method based on spoofing perception, which comprises the following steps: Acquiring information of interest, wherein the information of interest comprises signal power, attitude and direction of a GNSS satellite; calculating a spoofing offset vector according to the information of interest, and mapping the spoofing offset vector into eccentric amounts distributed by non-central chi-square; Calculating detection statistics, and calculating the missing detection probability according to the detection statistics; Counting the detected deception signals according to a space direction to form a probability quality function, calculating a space entropy according to the probability quality function, and calculating integrity weight loss according to the space entropy; calculating a position error expectation, and obtaining an overrun probability according to the position error expectation; and determining a minimum protection level meeting the constraint according to the integrity weight loss, the omission ratio and the overrun probability, and determining a navigation processing strategy according to the minimum protection level meeting the constraint. Preferably, determining the minimum protection level satisfying the constraint according to the integrity weight loss, the miss probability and the overrun probability comprises: and inputting the integrity weight loss, the missing detection probability and the overrun probability into an effective integrity loss upper limit model, and solving the minimum protection level meeting the constraint. Preferably, solving the minimum protection level that satisfies the constraint includes: and solving a minimum protection level meeting the constraint by the effective integrity loss upper limit calculation model under a preset integrity risk upper limit. Preferably, determining the navigation processing strategy according to the minimum protection level satisfying the constraint comprises: and if the minimum protection level meeting the constraint does not exceed the threshold value, maintaining the current navigation solution. Preferably, determining the navigation processing strategy according to the minimum protection level satisfying the constraint comprises: and if the minimum protection level meeting the constraint exceeds a threshold value, performing navigation warning. Preferably, the navigation warning includes: and outputting alarm information to the flight management system. Preferably, the method further comprises: and judging whether a deception signal is received according to the detection statistic. Preferably, the GNSS satellite signal power, GNSS satellite attitude and GNSS satellite direction are obtained f