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Method for optimizing and arranging sensors based on EI and step-by-step accumulation method

A step-by-step accumulation method, sensor technology, applied in instruments, special data processing applications, electrical digital data processing, etc., can solve the problems of low energy, information loss, and large amount of calculation at selected measuring points.

Inactive Publication Date: 2014-05-14
CHANGAN UNIV
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  • Application Information

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Problems solved by technology

The effective independent method does not take into account the inhomogeneity of the structural mass distribution, and there may be situations where the energy of the selected measuring point is low and the information is lost
However, when the sequence method has many measuring points to be selected, the amount of calculation is relatively large.

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  • Method for optimizing and arranging sensors based on EI and step-by-step accumulation method
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  • Method for optimizing and arranging sensors based on EI and step-by-step accumulation method

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Embodiment Construction

[0039] see figure 1 , the present invention is based on the sensor optimization layout method of EI and step-by-step accumulation method, comprises the following steps:

[0040] 1) Obtain the modal vector matrix of the structure through finite element calculations, determine the number of monitoring mode shapes, and determine the number of sensor arrangements;

[0041] 2) Use the EI method to optimize the modal vector matrix, select the initial measuring point to form the initial modal vector matrix; and obtain the remaining measuring point matrix to form a set of candidate added measuring points;

[0042] 3) Solve the confidence matrix MAC of the initial modal vector array, and find the maximum off-diagonal element max of the MAC matrix;

[0043] 4) Select a point from the set of candidate measurement points determined in step 2) to add to the initial measurement point, add the kth degree of freedom to the measurement degree of freedom, and find the 〖(MAC] of its modal vecto...

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Abstract

The invention discloses a method for optimizing and arranging sensors based on EI and step-by-step accumulation methods. The formulas provided by the method can be directly used for calculating optimization and arrangement position of sensors with different structure types and different calculated span bridges. The method is suitable for the technical field of bridge structure calculation analyzing. By means of the method, the maximum nondiagonal element of MAC is only one fiftieth of the EI method and one tenth of the step-by-step accumulation method, and the running time is relatively short. The method overcomes the defects of an existing optimization algorithm.

Description

technical field [0001] The invention belongs to the technical field of bridge structure calculation and analysis, and relates to a sensor optimization layout method, in particular to a sensor optimization layout method based on EI and step-by-step accumulation method. Background technique [0002] As the span and scale of bridge structures become larger and larger, health monitoring of bridge structures under operating conditions is a hot issue worthy of research. In a bridge health monitoring system, sensors are the "eyes" of the entire system. Through the sensor system, the bridge health monitoring system can monitor the structure in real time and send back data to lay the foundation for follow-up work. Sensor optimization layout is one of the key issues in designing a structural health monitoring system, and it is the first step in realizing a bridge health monitoring system, which has a crucial impact on data collection. The sensor system itself is a "contradiction". ...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 梁鹏王晓光李斌马旭明吴向男
Owner CHANGAN UNIV