Satellite fault diagnosing method based on AdaBoost algorithm

A satellite fault and diagnosis method technology, which is applied in computing, computer parts, special data processing applications, etc., can solve problems such as weak fault diagnosis ability, achieve the effect of increasing attention, enhancing diagnosis ability, and improving classification accuracy

Active Publication Date: 2015-01-07
HARBIN INST OF TECH
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Problems solved by technology

[0026] The purpose of the invention is to propose a satellite fault diagnosis method based on the AdaBoost algorithm, to solve the problem that the fault diagnosis method of the existing naive Bayesian system is weak to the fault state diagnosis ability of the number

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  • Satellite fault diagnosing method based on AdaBoost algorithm
  • Satellite fault diagnosing method based on AdaBoost algorithm
  • Satellite fault diagnosing method based on AdaBoost algorithm

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specific Embodiment approach 1

[0058] Specific embodiment one: a kind of satellite fault diagnosis method based on AdaBoost algorithm described in the present embodiment comprises the following steps: Step 1, data initialization: the information that satellite is provided is carried out statistics, constructs every kind of fault type and every different type The corresponding matrix of the occurrence times of the event features is used to establish the fault diagnosis model;

[0059] The data relationship between the status and event characteristics of the satellite and the status and fault type is shown in formula (1),

[0060]

[0061] In the formula, E i ——the characteristics of the i-th type of event, i=1,2,...N;

[0062] K - the total number of satellite states;

[0063] C j ——the jth state of the satellite, j=1,2,...K;

[0064] e ij ——the number of occurrences of the i-th event-type state monitoring data in the j-th state;

[0065] At this point, each sample in the training set is given the s...

specific Embodiment approach 2

[0083] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the specific process of assigning the same weight to each sample in the training set described in step 1 is:

[0084] Assign the same weight w to all samples in the training set, such as formula (3),

[0085] w ( i ) = 1 N - - - ( 3 )

[0086] In the formula, N - the number of state samples in the training set;

[0087] w (i) ——the weight of the i-th state sample, i=1,2...,N. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0088] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the specific process of updating the weights of the training set described in step 3 is: in order to measure the classification accuracy of the weighted training set by the weak classifier, Calculate the parameter β, such as formula (4), and then use the parameter β to adjust the weight, such as formula (5),

[0089] β = e 1 - e - - - ( 4 )

[0090] w ′ ( i ) = w ( i ) ( β ) 1 - I ...

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Abstract

The invention discloses a satellite fault diagnosing method based on an AdaBoost algorithm and belongs to the technical field of satellite fault diagnosis. The satellite fault diagnosing method based on the AdaBoost algorithm is aimed to solve the problem that the fault diagnosing method of an existing Naive Bayes system is weak to diagnose a little of fault states. The satellite fault diagnosing method based on the AdaBoost algorithm reasonably uses the integrated AdaBoost algorithm for the existing Naive Bayes fault diagnosing system and includes that changing the weight of a sample after each training, to be specific, changing the value of an event type characteristic of a misclassified sample, and improving the concern extent of the fault diagnosing system for the characteristic; building a new correspondence matrix between the state and the event characteristic, training a classifier again, and integrating the trained classifier into a new fault diagnosing classifier. The satellite fault diagnosing method based on the AdaBoost algorithm is suitable for the satellite fault diagnosing field.

Description

technical field [0001] The invention relates to a satellite fault diagnosis method, mainly relates to a satellite fault diagnosis method based on an AdaBoost algorithm, and belongs to the technical field of satellite fault diagnosis. Background technique [0002] With the continuous advancement of today's aerospace technology, human technological activities in space are increasing day by day. In recent years, the number of satellites in orbit in my country has increased significantly, and they are widely used in fields such as meteorological monitoring, image acquisition, and military reconnaissance. However, the expansion of satellite functions makes it more complex, and the on-orbit accident rate increases significantly. Therefore, in the face of a large and complex satellite system with huge investment, its reliability and safety are particularly important. Judging the working status and failure symptoms of the satellite, or performing rapid fault isolation and position...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00G06K9/66
Inventor 彭宇刘大同贺思捷庞景月彭喜元
Owner HARBIN INST OF TECH
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