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Minimum cut set analysis method-based power system reliability analysis method for more-electric aircraft

A technology of electric power system and multi-electric aircraft, applied in the direction of electric digital data processing, special data processing applications, instruments, etc., can solve the problems of system information hiding, road set matrix can not reflect the order of energy flow well, etc.

Inactive Publication Date: 2017-02-08
TIANJIN UNIV
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Problems solved by technology

[0007] However, there is still room for improvement in several aspects of this idea: on the one hand, depth-first search is used in the road set calculation process, which causes the road set matrix to fail to reflect the order of energy flow well, causing too much system information to be hidden; On the other hand, there is no in-depth exploration of the reliability changes of components in different time dimensions

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  • Minimum cut set analysis method-based power system reliability analysis method for more-electric aircraft
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  • Minimum cut set analysis method-based power system reliability analysis method for more-electric aircraft

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Embodiment Construction

[0050] The present invention will be described below with reference to the accompanying drawings and embodiments.

[0051] The specific indicators of reliability analysis are mainly reflected in the probability that the aircraft will not fail in unit time. From the knowledge of probability theory, it can be known that the sum of the failure rate and the probability of reliable operation (referred to as the reliability rate) is 1.

[0052] The mathematical principle and deletion method of using the adjacency matrix to obtain the path matrix in the graph theory mainly involved in the patent are introduced as follows

[0053] Use the adjacency matrix to find the mathematical principle of the path matrix:

[0054] Node network N=(V), where V={v 1 , v 2 , v 3 ......, v n} is the node set. An arc can be represented by two nodes, with the direction from the previous node to the next node.

[0055] Adjacency Matrix A 1 =[a 1 ij ], which describes the topology information in ...

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Abstract

The invention relates to a minimum cut set analysis method-based power system reliability analysis method for a more-electric aircraft. The method comprises the steps of making a topological structure diagram equivalent to a network node diagram; calculating a minimum path set from a source node to a specified node by adopting an adjacent matrix method; calculating a minimum cut set of fault occurrence; performing non-cross processing on the minimum cut set by adopting a ''delete and leave'' method; and converting an actual fault rate of a part into an equivalent fault rate of a node or an arc, and further calculating equivalent reliability. According to the method, weak points in an aircraft energy flowing process can be definitely displayed, improved suggestions are provided for aircraft energy usage schemes, and pointed schemes are provided for aircraft overhaul in different running time segments.

Description

technical field [0001] The invention relates to the fields of aerospace, power system safety analysis, graph theory analysis and the like. It can be widely used in reliability analysis of power systems with poor self-healing ability, such as airplanes in flight, ships in flight, and electric vehicles in high-speed motion. The invention is also suitable for analyzing the reliability of the independent operation of the micro-grid system. Background technique [0002] The multi-electric aircraft replaces the original hydraulic, pneumatic and mechanical drive systems with as many electrical systems as possible, trying to make the secondary energy of the aircraft use as much electrical energy as possible. The power system plays a leading role in the multi-electric aircraft, and its reliable and stable operation is related to the normal operation of the entire aircraft system. Aircraft safety accidents caused by the failure of the aircraft power system occur frequently, which ma...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/20
Inventor 车延博赵远程
Owner TIANJIN UNIV
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