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Liquid hydrogen adding system fault diagnosis and real-time alarm method

A filling system and fault diagnosis technology, applied in general control systems, control/adjustment systems, test/monitoring control systems, etc., can solve problems such as incomplete analysis, difficulty in describing faults, and failure to dynamically update fault databases in real time. Good logical relationship and efficient calculation effect

Inactive Publication Date: 2016-11-09
CHONGQING UNIV
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Problems solved by technology

[0004] The current fault diagnosis and real-time alarm methods have the characteristics of incomplete analysis, inability to dynamically update the fault database in real time, difficulty in describing the impact of faults on the system, and poor real-time performance.

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  • Liquid hydrogen adding system fault diagnosis and real-time alarm method
  • Liquid hydrogen adding system fault diagnosis and real-time alarm method

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Embodiment Construction

[0034] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0035] The preferred implementation examples of the present invention will be described in detail below in conjunction with the accompanying drawings; it should be understood that the preferred implementation examples are only for illustrating the present invention, rather than limiting the protection scope of the present invention.

[0036] figure 1 is the dynamic weighted fault tree analysis result of the liquid hydrogen filling system, where: ω m-n Indicates the nth fault at the mth layer of the fault tree, x i Indicates the i-th fault, X i Indicates the fault classification mode of the system; figure 2 It is the calculation process of the system risk rate based on the dynamic risk analysis method. Such as figure 1 and figure 2 As shown, the liquid hydrogen filling system fault diagnosis and real-time alarm method provided by thi...

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Abstract

The invention discloses a liquid hydrogen adding system fault diagnosis and real-time alarm method comprising the following steps of: S1, analyzing the fault mode of the liquid hydrogen adding system; S2, acquiring the probability density function of each fault by means of statistical analysis of historical data; S3, acquiring the fault incidence rate of the whole system by using a dynamic weighting fault tree; S4, describing a system accident generation and danger propagation process by using a risk analysis method; S5, acquiring a loss function of the system in combination with casualties, property loss, and social influence caused by accidents; and S6, evaluating the running performance of the system by using a danger index and achieving a dynamic system alarm. The method achieves real-time dynamic description of the liquid hydrogen adding system by using the dynamic weighting fault tree, fast acquires the real-time fault incidence rate of the system, achieves accident generation and danger propagation dynamic description by using the risk analysis technology, evaluates the running performance of the system in real time, achieves dynamic system alarm, and further gives system overhaul time.

Description

technical field [0001] The invention relates to the fields of failure mode analysis, risk analysis and real-time alarm, in particular to a method for fault diagnosis and real-time alarm of a liquid hydrogen filling system. Background technique [0002] With the rapid development of space applications such as manned spaceflight, large-scale communication satellites, and deep space exploration, the requirements for the performance and safety of liquid hydrogen filling systems are also increasing. Research on fault diagnosis and real-time alarm methods for liquid hydrogen filling systems Gaining importance. As an important ground equipment to ensure rocket fuel supply, the liquid hydrogen filling system mainly includes a liquid system and a gas system. The main function is to deliver propellant to the combustion chamber according to the required flow and pressure. It is the power source of the entire test bench and its position is extremely important. Due to the limitation of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02
CPCG05B23/0218
Inventor 柴毅张可毛永芳冯莉杨志敏
Owner CHONGQING UNIV
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