A Method for Recognition of Fuzzy Groups in Analog Circuits

A technology for simulating circuits and identifying methods, applied in the directions of analog circuit testing, electronic circuit testing, etc., can solve the problem of not getting rid of transfer function dependencies, etc., and achieve the effect of simple implementation methods

Inactive Publication Date: 2017-05-17
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The calculation of the symbolic analysis method is much easier than the transfer function, but the coefficient of the complex frequency s in the denominator of the test equation must be equal to 1, and still cannot get rid of the dependence on the transfer function

Method used

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  • A Method for Recognition of Fuzzy Groups in Analog Circuits
  • A Method for Recognition of Fuzzy Groups in Analog Circuits
  • A Method for Recognition of Fuzzy Groups in Analog Circuits

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Embodiment

[0072] In order to illustrate the implementation process and effects of the present invention, an actual circuit is taken as an example for simulation verification. Image 6 It is the schematic diagram of the analog circuit in the embodiment. like Image 6 As shown, the analog circuit in this embodiment is a band-pass filter circuit, and the measuring point t is the node between the element R1 and the elements R2 and C1. Firstly, the fault-free simulation of the circuit is carried out, and the fault-free voltage of the measuring point t is obtained as Two fault simulations are performed for each fault source in turn. Then, according to the no-fault voltage and fault voltage, the characteristic parameters of the circle equation corresponding to each fault source are obtained. Taking the first fault source resistance R1 as an example, its normal resistance value is 20kΩ. In the fault simulation of this embodiment, the resistance values ​​of the two fault simulations are resp...

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Abstract

The invention discloses a fuzzy group recognition method for an analog circuit. The general characteristic of the fault voltage of an analog circuit element is deduced theoretically: the real part and the imaginary part satisfy the circle equation. According to the characteristic, a fuzzy group recognition method is proposed: for each fault source, First perform no-fault simulation to obtain the no-fault voltage value of the measuring point, then perform simulation under two fault conditions to obtain two fault voltage values, solve the circle equations according to the three voltage values ​​to obtain the circle characteristic parameters, and compare the corresponding The circle feature parameters of , and the fault sources with the same three parameters are classified into a fuzzy group. The invention does not need a transfer function, its realization method is simple, and the recognition result of the fuzzy group has nothing to do with the test method, and the accuracy is the same as that of the transfer function and the symbol analysis method.

Description

technical field [0001] The invention belongs to the technical field of fault diagnosis of analog circuits, and more specifically relates to a method for identifying fuzzy groups of analog circuits. Background technique [0002] A fuzzy group is defined as a set of components for which there is no unique solution to the test equations for the analog circuit under test. In layman's terms, this group of components can produce the same output. Determining the fuzzy group information of analog circuits is the primary task of analog circuit testability design and fault diagnosis. Fuzzy group information is determined by the characteristics of the analog circuit under test and has nothing to do with the test method. At present, there are mainly two methods for fuzzy group identification. One is to determine the information of the fuzzy group by performing QR decomposition on the test equation group (transfer function of different measuring points). This type of method is affect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/316
Inventor 杨成林田书林刘震龙兵周秀云
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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