CN109813358A - A kind of Transducer-fault Detecting Method based on the diagnosis of redundancy coupled signal - Google Patents
A kind of Transducer-fault Detecting Method based on the diagnosis of redundancy coupled signal Download PDFInfo
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- CN109813358A CN109813358A CN201910001620.XA CN201910001620A CN109813358A CN 109813358 A CN109813358 A CN 109813358A CN 201910001620 A CN201910001620 A CN 201910001620A CN 109813358 A CN109813358 A CN 109813358A
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Abstract
The invention discloses a kind of Transducer-fault Detecting Methods based on the diagnosis of redundancy coupled signal, include the following steps: 1, establish the mathematical model between fault-tolerant matrix, measurement value sensor and output vector；2, the initialization assignment of each parameter and matrix；3, judgement may problematic sensor；4, the sensor that confirmation is broken down.The inventive structure is simple, and flexibility is high, and low cost can fast implement the fault detection of sensor.
Description
Technical field
The invention belongs to observation and control technology field, in particular to a kind of sensor fault inspection based on the diagnosis of redundancy coupled signal
Survey method.
Background technique
Transient fault is to lead to the major failure form of systematic failures, and transient fault is restored to be the important of guarantee system safety
Means, when system jam, the intervention of redundant configuration component can undertake the work of trouble unit, reduce the event of system
Downtime increases the reliability of system, therefore carries out redundant component configuration sometimes for the physical quantity of required detection.For
The redundant component of configuration, such as two (kinds) or multiple (kind) sensors, the reliability of each sensor self performance also need in advance
Realize effectively detection.
In each field such as communication, software, machinery, electronics, all there is signal coupling phenomenon, some force snesors, outputs
Signal is related with each power/moment components, it is therefore necessary to and signal to be detected could be obtained by carrying out decoupling to each road output signal, this
Increase the difficulty that the sensor that breaks down is detected in engineer application.
Therefore the fault detection method of sensor can be fast implemented with important by redundancy coupled signal by designing one kind
Meaning.
Summary of the invention
Goal of the invention: in view of the foregoing drawbacks, it is simple that the present invention provides a kind of structure, and flexibility is high, and low cost can be quick
Middle and small scale redundancy coupled signal is handled, realizes the sensor event based on the diagnosis of redundancy coupled signal of the fault detection of sensor
Hinder detection method.
Technical solution: the present invention proposes a kind of Transducer-fault Detecting Method based on the diagnosis of redundancy coupled signal, including
Following steps:
(1) mathematical model between fault-tolerant matrix, measurement value sensor and output vector is established；
(2) initialization assignment is carried out to each parameter and matrix；
(3) judgement is carried out to each sensor and selects possible problematic sensor；
(4) sensor that confirmation is broken down.
Further, the mathematical modulo in the step (1) between the fault-tolerant matrix of building, measurement value sensor and output vector
Specific step is as follows for type:
Ax=b
Wherein, fault-tolerant matrix A is that the m × n being arranged according to engineering practical experience ties up input matrix；Measurement value sensor x is
The dimensional vector of n × 1 of the practical composition that gets parms of multiple or multiple sensors, each or every kind of sensor read a ginseng every time
Number；B is the dimension output column vector of m × 1；M is the number of probes of input, and n is the sensor signal measured value of input.
Further, each parameter and matrix that initialization assignment is carried out in the step (2) include fault-tolerant matrix A, sensing
Device measured value x and fault-tolerant threshold value δ.
Further, judgement is carried out to each sensor in the step (3) and selects possible problematic sensor
Specific step is as follows:
(3.1) compare the size relation between the fault-tolerant threshold value δ of the fixation of each element and setting in output vector b；
(3.2) corresponding possible problematic sensor number is found out.
Further, the fault-tolerant threshold value of the fixation of each element and setting in output vector b is compared in the step (3.1)
Specific step is as follows for size relation between δ: when the row element of output column vector b is less than the fault-tolerant threshold value δ of fixation of setting
When assign the output column vector b row element value be 0；If element is greater than the fault-tolerant threshold value δ of fixation of setting in column vector b, do not do
Processing.
Further, corresponding possible problematic sensor number is found out in the step (3.2), and specific step is as follows:
The row matrix that the non-zero element of output vector corresponds to fault-tolerant matrix A is found, the corresponding non-zero element value of the row is possible problematic
Sensor number.
Further, specific step is as follows for the sensor that confirmation is broken down in the step (4):
(4.1) row matrix that possible problematic sensor corresponds to fault-tolerant matrix A is found out；
(4.2) these correspondence rows for taking out output vector, reconfigure column vector；
(4.3) judge whether possible problematic sensor breaks down, and finally determine the sensor of existing failure.
Further, the sensor of existing failure is finally determined in the step (4.3), and specific step is as follows: if step
(4.2) the column vector full rank constructed in, the problematic sensor of possibility break down the simultaneously final output failure really
Sensor number, otherwise the problematic sensor of possibility be not present failure do not export the sensor number then.
The present invention by adopting the above technical scheme, has the advantages that
A kind of Transducer-fault Detecting Method based on the diagnosis of redundancy coupled signal of the present invention is a kind of and utilizes computer
The data collection and transmission of hardware resource itself and Development of Software Platform, structure is simple, and flexibility is high, low cost, energy
Enough quickly processing middle and small scale redundancy coupled signals, realize the fault detection of sensor.
Detailed description of the invention
Fig. 1 is flow chart of the invention.
Specific embodiment
Combined with specific embodiments below, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate the present invention
Rather than limit the scope of the invention, after the present invention has been read, those skilled in the art are to various equivalences of the invention
The modification of form falls within the application range as defined in the appended claims.
The embodiment of the present invention includes following steps as shown in Figure 1::
Step 1: the mathematical model between fault-tolerant matrix, measurement value sensor and output vector is established；
Mathematical relationship between fault-tolerant matrix, measurement value sensor and output vector meets:
Ax=b (1)
Wherein, fault-tolerant matrix A is that the m × n being arranged according to engineering practical experience ties up input matrix；Measurement value sensor x is
The dimensional vector of n × 1 of the practical composition that gets parms of multiple or multiple sensors, each or every kind of sensor read a ginseng every time
Number；B is the dimension output column vector of m × 1；M is the number of probes of input, and n is the sensor signal measured value of input.To any 1
≤ k≤m, ak1x1+ak2x2++aknxn=bkFormula (1) linear correlation need to be met, then parameter must meet in the fault-tolerant matrix A being arranged
ak1 2+ak2 2++akn 2≠0。
Step 2: the initialization assignment of each parameter and matrix；
Fault-tolerant matrix A, measurement value sensor x and fault-tolerant threshold value δ are respectively as follows:
X=[7 4312 2]T (3)
δ=0.2 (4)
There is coupled relation each other in No. 1 sensor, No. 3 sensors and No. 5 sensors known to formula (2) and formula (3), and 2
There is coupled relation each other in number sensor, No. 4 sensors and No. 6 sensors.
Step 3: judgement may problematic sensor；
Fault-tolerant matrix A is tieed up by the m × n set and the dimensional vector of n × 1 x can get the column vector b of m × 1, column vector b is each
Row element is compared with the fault-tolerant threshold value δ of the fixation of setting respectively, if the column vector b row element is less than the fault-tolerant threshold of fixation of setting
Value δ, assigning the column vector b row element value is 0；If element is greater than the fault-tolerant threshold value δ of fixation of setting in column vector b, without place
Reason.
It calculates and obtains shown in column vector b such as formula (5):
B=[1 010 0]T (5)
Due to fault-tolerant threshold value δ=0.2, there is no the nonzero values for being less than fixed fault-tolerant threshold value, therefore to the column vector b calculated
It does not deal with.
The corresponding possible problematic sensor number, that is, fault-tolerant matrix A of each row nonzero element of column vector b corresponds to the row coefficient
It is not 0 serial number.Be the first row and the third line known to formula (5) by the column vector b for being more than fault-tolerant threshold value δ, from formula (2) can pivot column to
Measuring the corresponding possible problematic sensor number of b the first row is No. 1 and No. 5；Column vector b the third line correspondence known to formula (2) can
The problematic sensor number of energy is No. 1 and No. 3.
Step 4: confirm the sensor of failure.
The corresponding possible problematic sensor number of column vector b the first row is No. 1 and No. 5, is known and No. 1 biography by formula (2)
The relevant row matrix of sensor is the first row and the third line, they are expert at the column vector constituted known to formula (5)By
Row matrix relevant to No. 5 sensors known to formula (2) is the first row and fifth line, knows that they are expert at by formula (5) and constitutes
Column vector
The corresponding possible problematic sensor number of column vector b the third line is No. 1 and No. 3, is known and No. 1 biography by formula (2)
The relevant row matrix of sensor is the first row and the third line, they are expert at the column vector constituted known to formula (5)By
Row matrix relevant to No. 3 sensors known to formula (2) is the third line and fifth line, knows that they are expert at by formula (5) and constitutes
Column vector
Because of the column vector full rank that row matrix relevant to No. 1 sensor is constituted, therefore there are failures for No. 1 sensor.
Claims (8)
1. a kind of Transducer-fault Detecting Method based on the diagnosis of redundancy coupled signal, which comprises the steps of:
(1) mathematical model between fault-tolerant matrix, measurement value sensor and output vector is established；
(2) initialization assignment is carried out to each parameter and matrix；
(3) judgement is carried out to each sensor and selects possible problematic sensor；
(4) sensor that confirmation is broken down.
2. a kind of Transducer-fault Detecting Method based on the diagnosis of redundancy coupled signal according to claim 1, feature
It is, the specific steps of the mathematical model in the step (1) between the fault-tolerant matrix of building, measurement value sensor and output vector
It is as follows:
Ax=b
Wherein, fault-tolerant matrix A is that the m × n being arranged according to engineering practical experience ties up input matrix；Measurement value sensor x is multiple
Or the dimensional vector of n × 1 of the practical composition that gets parms of multiple sensors, each or every kind of sensor read a parameter every time；b
Output column vector is tieed up for m × 1；M is the number of probes of input, and n is the sensor signal measured value of input.
3. a kind of Transducer-fault Detecting Method based on the diagnosis of redundancy coupled signal according to claim 1 or 2, special
Sign is, each parameter and matrix that initialization assignment is carried out in the step (2) include fault-tolerant matrix A, measurement value sensor x with
And fault-tolerant threshold value δ.
4. a kind of Transducer-fault Detecting Method based on the diagnosis of redundancy coupled signal according to claim 3, feature
Be, in the step (3) to each sensor carry out judgement select may problematic sensor specific step is as follows:
(3.1) compare the size relation between the fault-tolerant threshold value δ of the fixation of each element and setting in output vector b；
(3.2) corresponding possible problematic sensor number is found out.
5. a kind of Transducer-fault Detecting Method based on the diagnosis of redundancy coupled signal according to claim 4, feature
It is, the size in the step (3.1) in relatively output vector b between the fault-tolerant threshold value δ of the fixation of each element and setting
Specific step is as follows for relationship: assigning output column as the fault-tolerant threshold value δ of the fixation that the row element for exporting column vector b is less than setting
The vector b row element value is 0；If element is greater than the fault-tolerant threshold value δ of fixation of setting in column vector b, it is not processed.
6. a kind of Transducer-fault Detecting Method based on the diagnosis of redundancy coupled signal according to claim 5, feature
It is, corresponding possible problematic sensor number is found out in the step (3.2), and specific step is as follows: finding output vector
Non-zero element corresponds to the row matrix of fault-tolerant matrix A, and the corresponding non-zero element value of the row is possible problematic sensor number.
7. a kind of Transducer-fault Detecting Method based on the diagnosis of redundancy coupled signal according to claim 3, feature
It is, specific step is as follows for the sensor that confirmation is broken down in the step (4):
(4.1) row matrix that possible problematic sensor corresponds to fault-tolerant matrix A is found out；
(4.2) these correspondence rows for taking out output vector, reconfigure column vector；
(4.3) judge whether possible problematic sensor breaks down, and finally determine the sensor of existing failure.
8. a kind of Transducer-fault Detecting Method based on the diagnosis of redundancy coupled signal according to claim 7, feature
It is, the sensor of existing failure is finally determined in the step (4.3), and specific step is as follows: if construction in step (4.2)
Column vector full rank, the problematic sensor of the possibility breaks down really and the sensor of the final output failure is compiled
Number, otherwise the problematic sensor of the possibility does not export the sensor number then there is no failure.
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| CN111397653A (en) * | 2020-04-01 | 2020-07-10 | 中煤科工集团重庆研究院有限公司 | Fault diagnosis system and method for sensor for coal mine |
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