CN106776276B - A kind of nuclear leve I&C system transmission function dynamic characteristic test method - Google Patents
A kind of nuclear leve I&C system transmission function dynamic characteristic test method Download PDFInfo
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/36—Preventing errors by testing or debugging software
- G06F11/3668—Software testing
- G06F11/3672—Test management
- G06F11/3688—Test management for test execution, e.g. scheduling of test suites
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/36—Preventing errors by testing or debugging software
- G06F11/3664—Environments for testing or debugging software
Abstract
The invention discloses a kind of nuclear leve I&C system transmission function dynamic characteristic test methods, comprising the following steps: step 1: test environment, connection signal generator, I&C system and wave tracer are built in design；Step 2: signal generator input step signal to I&C system exports analog signals after I&C system operation, by wave tracer acquisition input, signal output waveform, and forms Wave data file；Step 3: wave data processing, calculation of transfer function parameter are carried out according to output waveform data file；Step 4: the waveform trend of the output signal of each algorithm step response output steady-state value, calculated load transfer function coefficient and algorithm step response output steady-state value is recorded according to wave data processing result；Step 5: output valve, the waveform trend of output signal, the load transfer function coefficient comprehensive judgement correctness tested and calculated after being stablized according to step response.The small executory cost of integrated testability workload of the present invention is low.
Description
Technical field
The present invention relates to nuclear power industry safety level instrument control platform test technical field more particularly to a kind of nuclear leve I&C system passes
Delivery function algorithm function dynamic characteristic test method.
Background technique
Nuclear leve I&C system, for realize its input signal data handle, will use first-order lag algorithm transmission function LAG,
First-order lead hysteresis algorithm transmission function LLAG, differential algorithm transmission function DIFFER transmission function algorithm, current country's outer core
Grade I&C system manufacturer tests for these transmission function algorithm functions of I&C system, mainly includes following two method:
1) code dynamic is tested, using white-box testing method, including two ways: code emulation test, software stub are surveyed
Examination.Code emulation test is, by step (period) operation " algorithm ", to pass through confirmation each cycle " algorithm " output in simulated environment
Value determines the correctness of " algorithm " operation；Software stub test is modification " algorithm " code, and (insertion is disconnected for pitching pile in " algorithm "
Point), " algorithm " is run on real hardware board, the correct of " algorithm " operation is determined by " algorithm " output valve when confirmation breakpoint
Property.
2) Static output is tested, and using Black-box Testing method, acquires instrument control ssystem transfer function algorithm function by oscillograph
The output of energy passes through the correctness that confirmation stable state output valve determines transmission function algorithm function.
And in non-core industry, MATLAB tool can be used, letter is transmitted based on inputoutput data waveform identification control system
Number parameter, the specific method is as follows:
Using " system identification tool " System Identification Toolbox of MATLAB software, system is being determined
Inputoutput data after, design certain identifiability principle (transmission function order, zero pole point form still damp form, sampling
Time), MATLAB can be identified load transfer function coefficient.
Above-mentioned test method has the following deficiencies:
1. code dynamic is tested, emulation ring is used when the verifying of controller each cycle operation result may be implemented, but verifying
The mode of border or software stub, cannot directly react dynamic characteristic when true operation, and when time parameter is big, execution cycle
When number is more, test job amount is big, and testing cost is high.
2. Static output is tested, the stable state output of transmission function algorithm function can be only tested, dynamic characteristic cannot be tested.
3. doing load transfer function coefficient identification using non-core industry, the dynamic characteristic of transmission function algorithm function can be verified,
But " system identification tool " tool of MATLAB software need to be used, in nuclear safe level statutory standard IEC
In 60880-2006, software of the clear stipulaties for verification and validation need to be assessed, be evaluated, and confirm its reliability, general
Way is to carry out Choosing Type Analysis, verifying evaluation, and for " system identification tool " tool of MATLAB,
The algorithm used is complicated, and it is at high cost to carry out verifying evaluation.
Summary of the invention
For disadvantage mentioned above, the present invention provides a kind of nuclear leve I&C system transmission function dynamic characteristic test method, shapes
At based on control system step response output waveform greatest gradient tangent line and key point coordinate, the side of calculation of transfer function parameter
Method, for verifying nuclear safe level I&C system transmission function calculation function dynamic characteristic
To achieve the goals above, technical solution provided by the invention includes:
A kind of nuclear leve I&C system transmission function dynamic characteristic test method, comprising the following steps:
Step 1: test environment, connection signal generator, I&C system and wave tracer are built in design；
Step 2: signal generator input step signal to I&C system, after I&C system operation, output analog quantity letter
Number, by wave tracer acquisition input, signal output waveform, and form Wave data file；
Step 3: wave data processing, calculation of transfer function parameter are carried out according to output waveform data file；
Step 4: each algorithm step response is recorded according to wave data processing result and exports steady-state value, calculated transmitting
The waveform trend of the output signal of function parameter and algorithm step response output steady-state value；
Step 5: output valve, the waveform trend of output signal, the transmitting letter tested and calculated after being stablized according to step response
Number parametric synthesis determines correctness.
Further, in the step 2, the wave tracer sampling period is less than the 1/3 of the I&C system execution cycle,
And it can be divided exactly by execution cycle.
Further, the wave data processing of the step 3, calculation of transfer function parameter include following method: according to output
Wave data file, key point coordinate value in automatic identification LAG waveform, the greatest gradient tangent line for drawing LLAG, DIFFER waveform,
Calculation of transfer function parameter.
Further, the wave data processing method of the step 3 is as follows:
A) to LAG algorithm:
It identifies zero point, is greater than the point of 0.1%F.S. in signal output waveform data with next value variation, as zero point；
63.2% value of ascensional range is calculated, determines key point coordinate as ordinate；According to key point abscissa, determine that transmission function is joined
Number；
B) to LLAG algorithm:
It identifies zero point, is greater than the point of 0.1%F.S. in signal output waveform data with next value variation, as zero point；
Search highest point；Greatest gradient tangent line expression formula is derived, behind highest point, in all sampled points, finds out execution cycle time interval
Maximum two points of ordinate deviation are exactly greatest gradient tangent line with the two point lines, according to the coordinate value of coordinate (a1, b1)
With the coordinate value of coordinate (a2, b2), tangent line expression formula is derived:
The intersection point for finding out tangent line and y=b and axis of ordinates puts coordinate calculating parameter T1, T2 according to the two:
C) to DIFFER algorithm:
It identifies zero point, is greater than the point of 0.1%F.S. in signal output waveform data with next value variation, as zero point；
Search highest point；Greatest gradient tangent line expression formula is derived, behind highest point, in all sampled points, finds out execution cycle time interval
Maximum two points of large deviations are exactly greatest gradient tangent line with the two point lines, according to the coordinate value and seat of coordinate (a1, b1)
The coordinate value for marking (a2, b2), shifts tangent line expression formula onto:
The intersection point for finding out tangent line and axis of abscissas determines load transfer function coefficient according to the abscissa of intersection point:
Further, steady-state value determination method in the step 4 are as follows: compare collected steady-state value and theoretical steady-state value, partially
Difference is less than 0.1%F.S.；Waveform trend determination method are as follows: judge the consistency of collected waveform and theoretical waveform.
Beneficial effects of the present invention are as follows:
1. can be with the test method of black box, the dynamic verified when instrument control ssystem transfer function algorithm function is really run is special
Property, test result is intuitive, can effectively improve user to the confidence of I&C system.
2. testing procedure is few, testing tool, test method are simple, and integrated testability workload is small, and test execution is at low cost.
3. carrying out test data analysis using self-developed program, from developing, programmed algorithm is succinct, function-specific.To opening certainly
Hair program carries out verifying evaluation, and method is simple, at low cost.
Detailed description of the invention
Fig. 1 is LAG transmission function, step response waveform；
Fig. 2 is LLAG transmission function, step response waveform；
Fig. 3 is DIFFER transmission function, step response waveform；
Fig. 4 is test environment structure chart of the invention.
Specific embodiment
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings and examples, how to apply to the present invention whereby
Technological means solves technical problem, and the realization process for reaching technical effect can fully understand and implement.It needs to illustrate
, these specific descriptions only allow those of ordinary skill in the art to be more easier, clearly understand the present invention, rather than to this hair
Bright limited explanation；And if conflict is not constituted, each spy in each embodiment and each embodiment in the present invention
Sign can be combined with each other, and it is within the scope of the present invention to be formed by technical solution.
Below by the drawings and specific embodiments, technical solution of the present invention is described in detail:
LAG: first-order lag algorithm, transmission function.
LLAG: first-order lead hysteresis algorithm, transmission function.
LLAG: first-order lead hysteresis algorithm, transmission function.
Mathematical theory basis of the invention is as follows: being rung according to the step of tri- kinds of transmission function algorithms of LAG, LLAG, DIFFER
Output waveform is answered, load transfer function coefficient can be calculated by key point and greatest gradient tangent line.For LAG transmission function, rank
The response wave shape that jumps is as shown in Figure 1.When rising to rise total amplitude 63.2% on the output, the rise time is equal to parameter T.
For LLAG transmission function, step response waveform is as shown in Figure 2.Behind its output to highest point, waveform is most
The abscissa value of the intersection point of big slope tangent line and y=b straight line, is equal to parameter T1；Greatest gradient tangent line and axis of ordinates intersection point, etc.
In b*T2/T1.
For DIFFER transmission function, step response waveform is as shown in Figure 3.Behind its output to highest point, waveform
The intersection point of greatest gradient tangent line and axis of abscissas is equal to parameter T.
Test method of the invention exports steady-state value (output valve after stablizing), output by transmission function algorithm step response
Waveform trend, the load transfer function coefficient tested and calculated, it is common to determine instrument control ssystem transfer function calculation function correctness.
As shown in figure 4, instrument used in test includes the signal generator with I&C system communication (for generating simulation
Measure step signal), wave tracer (for collecting and recording input/output signal waveform, the model RA2300 used here,
Formation Wave data file is CSV format).
Step signal is sent to I&C system input terminal using signal generator, and step signal is through I&C system transmission function
It is exported after operation, by wave tracer acquisition and recording I&C system signal output waveform, and forms the transmission of Wave data file
To I&C system, output waveform data includes two column: time coordinate, output signal sampled value.
Use a kind of VB (Visual Basic, modularization programming language developed by Microsoft) exploitation Wave data
Manage program, I&C system according to output waveform data file, key point coordinate value in automatic identification LAG waveform, draw LLAG,
The greatest gradient tangent line of DIFFER waveform, calculation of transfer function parameter.
Record each transmission function algorithm step response output steady-state value, the load transfer function coefficient tested and calculated and output
The waveform trend of signal, whole decision algorithm function accuracy.
The specific method is as follows:
The present invention applies in nuclear safe level digitlization instrument control platform FirmSys system testing, for verifying FirmSys
I&C system transmission function algorithm function dynamic characteristic.
It is 15ms that FirmSys I&C system execution cycle is arranged in test, and to three kinds of transmission functions, parameter setting is as follows:
LAG parameter T=1s
LLAG parameter T1=4s, T2=30s
DIFFER parameter T=4s
A kind of nuclear leve I&C system transmission function dynamic characteristic test method, comprising the following steps:
Step 1: test environment is built in design, as shown in figure 4, test environment includes sequentially connected signal generator, instrument
Control system and wave tracer.
Step 2: test execution, operation signal generator export step signal to system under test (SUT), respectively transmit through system under test (SUT)
Functional operation (calculating process: Stepped Impedance Resonators, respectively by tri- kinds of transmission function fortune of LAG, LLAG, DIFFER in system under test (SUT)
Calculate, generate step response) after, it is exported by 4-20mA current-mode analog quantity signal, is believed by wave tracer acquisition input, output
Number waveform, and form Wave data file.In order to subsequent greatest gradient tangent line, wave tracer can be drawn by Wave data
Sampling period is less than the 1/3 of system under test (SUT) execution cycle, and can be divided exactly by execution cycle.Waveform is arranged in the present embodiment to remember
Record instrument sampling period 5ms.Operation signal generator sends 4mA to 6mA skip signal to the input terminal of I&C system, uses wave
Shape recorder acquires the Wave data of the output signal after three kinds of algorithms respectively.
Step 3: wave data processing develops wave data processing program, to wave tracer using VB programming language
The CSV formatted data file of formation is analyzed and processed:
A) to LAG algorithm:
It identifies zero point, is greater than the point of 0.1%F.S. in signal output waveform data with next value variation, as zero point；
63.2% value of ascensional range is calculated, determines key point coordinate as ordinate；According to key point abscissa, determine that transmission function is joined
Number.To LAG algorithm step response output waveform data, calculating parameter T=1s.
B) to LLAG algorithm:
It identifies zero point, is greater than the point of 0.1%F.S. in signal output waveform data with next value variation, as zero point；
Search highest point；Greatest gradient tangent line expression formula is derived, behind highest point, in all sampled points, finds out execution cycle time interval
Maximum two points of ordinate deviation are exactly greatest gradient tangent line with the two point lines, according to the coordinate value of coordinate (a1, b1)
With the coordinate value of coordinate (a2, b2), tangent line expression formula is shifted onto:
The intersection point for finding out tangent line and y=b and axis of ordinates puts coordinate calculating parameter T1, T2 according to the two:
To LLAG algorithm step response output waveform data, calculating parameter T1=4s, T2=30.1s.
C) to DIFFER algorithm:
It identifies zero point, is greater than the point of 0.1%F.S. in signal output waveform data with next value variation, as zero point；
Search highest point；Greatest gradient tangent line expression formula is derived, behind highest point, in all sampled points, finds out execution cycle time interval
Maximum two points of large deviations are exactly greatest gradient tangent line with the two point lines, according to the coordinate value and seat of coordinate (a1, b1)
The coordinate value for marking (a2, b2), shifts tangent line expression formula onto:
The intersection point for finding out tangent line and axis of abscissas determines load transfer function coefficient according to the abscissa of intersection point:
To DIFFER algorithm step response output waveform data, calculating parameter T=4s.
Step 4: each algorithm step response output steady-state value and waveform trend are recorded, steady-state value is by reading waveform recording
The collected steady-state value of instrument, compares collected steady-state value and theoretical steady-state value, and deviation is less than 0.1%F.S.；Waveform trend by
Tester's subjective determination judges that the consistency of collected waveform and theoretical waveform, judgment criteria include waveform variation tendency
Whether consistent (whether having wave crest, final output whether stable), whether smooth impulse- free robustness.Record the output of LAG algorithm step response
Steady-state value=6.01V calculates steady-state current value=6.01mA, and record LLAG algorithm step response exports steady-state value=6.012V,
Steady-state current value=6.012mA is calculated, record DIFFER algorithm step response exports steady-state value=3.984V, calculates steady-state current
Value=3.984mA observes waveform trend.
Step 5: output valve (output steady-state value) after being stablized according to step response, tests and calculates output waveform trend
Whether the above-mentioned three of load transfer function coefficient comprehensive judgement is consistent, consistent to be correct and pass through, and is otherwise inaccuracy, does not pass through.
Test record and comprehensive judgement are as follows:
Claims (4)
1. a kind of nuclear leve I&C system transmission function dynamic characteristic test method, which comprises the following steps:
Step 1: test environment, connection signal generator, I&C system and wave tracer are built in design；
Step 2: signal generator input step signal to I&C system exports analog signals after I&C system operation,
By wave tracer acquisition input, signal output waveform, and form Wave data file；
Step 3: wave data processing, calculation of transfer function parameter are carried out according to output waveform data file；Wherein, the meter
Calculating load transfer function coefficient includes: according to output waveform data file, and key point coordinate value in automatic identification LAG waveform is drawn
The greatest gradient tangent line of LLAG, DIFFER waveform, calculation of transfer function parameter；
Step 4: each algorithm step response is recorded according to wave data processing result and exports steady-state value, calculated transmission function
The waveform trend of the output signal of parameter and algorithm step response output steady-state value；
Step 5: output valve, the waveform trend of output signal, the transmission function tested and calculated are joined after being stablized according to step response
Number synthesis determines correctness.
2. nuclear leve I&C system transmission function dynamic characteristic test method as described in claim 1, which is characterized in that the step
In rapid two, the wave tracer sampling period is less than the 1/3 of the I&C system execution cycle, and can be divided exactly by execution cycle.
3. nuclear leve I&C system transmission function dynamic characteristic test method as described in claim 1, which is characterized in that the step
Rapid three wave data processing method is as follows:
A) to LAG algorithm:
It identifies zero point, is greater than the point of 0.1%F.S. in signal output waveform data with next value variation, as zero point；It calculates
63.2% value of ascensional range determines key point coordinate as ordinate；According to key point abscissa, load transfer function coefficient is determined；
B) to LLAG algorithm:
It identifies zero point, is greater than the point of 0.1%F.S. in signal output waveform data with next value variation, as zero point；It searches
Highest point；Greatest gradient tangent line expression formula is derived, behind highest point, in all sampled points, finds out that execution cycle time interval is vertical to sit
Maximum two points of deviation are marked, are exactly greatest gradient tangent line with the two point lines, according to the coordinate value and seat of coordinate (a1, b1)
The coordinate value of (a2, b2) is marked, tangent line expression formula is derived:
The intersection point for finding out tangent line and y=b and axis of ordinates puts coordinate calculating parameter T1, T2 according to the two:
C) to DIFFER algorithm:
It identifies zero point, is greater than the point of 0.1%F.S. in signal output waveform data with next value variation, as zero point；It searches
Highest point；Greatest gradient tangent line expression formula is derived, behind highest point, in all sampled points, is found out in execution cycle time interval partially
Maximum two points of difference are exactly greatest gradient tangent line with the two point lines, according to the coordinate value and coordinate of coordinate (a1, b1)
The coordinate value of (a2, b2) shifts tangent line expression formula onto:
The intersection point for finding out tangent line and axis of abscissas determines load transfer function coefficient according to the abscissa of intersection point:
4. nuclear leve I&C system transmission function dynamic characteristic test method as described in claim 1, which is characterized in that the step
Steady-state value determination method in rapid four are as follows: compare collected steady-state value and theoretical steady-state value, deviation is less than 0.1%F.S.；Waveform
Tendency judgement method are as follows: judge the consistency of collected waveform and theoretical waveform.
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| US20150294041A1 (en) * | 2013-07-11 | 2015-10-15 | The University Of North Carolina At Chapel Hill | Methods, systems, and computer readable media for simulating sound propagation using wave-ray coupling |
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| CN1509553A (en) * | 2001-04-19 | 2004-06-30 | 新加坡国立大学 | Method and apparatus for generating pulse using dynamic transfer function characteristics |
| CN103514087A (en) * | 2012-06-18 | 2014-01-15 | 中国电子科技集团公司第四十一研究所 | Measuring instrument software simulation verification system |
| CN103019223A (en) * | 2012-11-22 | 2013-04-03 | 北京广利核系统工程有限公司 | Method for automatically processing safety level DCS response time testing data in nuclear power station |
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