Time-varying random system event trigger fault detection method based on coordinate transformation

A technology of event triggering and fault detection, which is applied in the general control system, control/regulation system, test/monitoring control system, etc., and can solve the problems of system fault impact and fault detection not considered

Pending Publication Date: 2020-05-08
AIR FORCE UNIV PLA
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Problems solved by technology

[0005] To sum up, the existing problems in the existing technology are: the application of coordinate transformation in the existing technology for fault diagnosis detection is vulnerable to system faults, and has not been considered for time-triggered fault detection

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  • Time-varying random system event trigger fault detection method based on coordinate transformation
  • Time-varying random system event trigger fault detection method based on coordinate transformation
  • Time-varying random system event trigger fault detection method based on coordinate transformation

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Embodiment Construction

[0029] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0030] Aiming at the problems existing in the prior art, the present invention provides a time-varying random system event-triggered fault detection method based on coordinate transformation. The present invention will be described in detail below with reference to the accompanying drawings.

[0031] Such as figure 1 As shown, the time-varying random system event-triggered fault detection method based on coordinate transformation provided by the embodiment of the present invention includes the following steps:

[0032] S101: Using a coordinate transformation method to remove superimposed unknown interference from one of th...

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Abstract

The invention belongs to the technical field of event trigger fault detection, and discloses a time-varying random system event trigger fault detection method based on coordinate transformation, and the method comprises the steps that: superposed unknown interference is removed from one subsystem by employing a coordinate transformation method; for each subsystem, an optimal event trigger filter is constructed by utilizing an unbiased and minimum variance optimal criterion; when any system breaks down, a residual error will exceed a preset threshold value, current measurement information willbe immediately sent to a remote filter, and a diagnosis decision triggered by an event does not need to be input. According to the invention, a coordinate transformation method is utilized to realizethe characteristic that the fault detection residual error is only sensitive to system faults and has robustness to additive unknown interference; a considered system can be converted into two subsystems, and interference is removed from one subsystem; and further the optimal gain of each filter is derived, and the optimal gain is applied to an optimization criterion of unbiased and minimum mean square estimation errors.

Description

technical field [0001] The invention belongs to the technical field of event-triggered fault detection, in particular to a time-varying random system event-triggered fault detection method based on coordinate transformation. Background technique [0002] At present, the closest existing technology is: (1) comparative diagnosis method, which is widely used at present, first collects and stores data on various information of various process parameters, such information includes vibration amplitude, frequency, phase, rotational speed , displacement, mode, temperature, pressure and flow, etc. Then establish a database of corresponding information, and at the same time make graphs such as trend analysis. Save a variety of information about the normal operating state of the machine and equipment. When the equipment fails, compare the current data with the data in the normal operating state, and then combine the information characteristics of the fault performance and use the diag...

Claims

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Application Information

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IPC IPC(8): G05B23/02
CPCG05B23/0243G05B2219/24065
Inventor 和柳
Owner AIR FORCE UNIV PLA
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