CN109100211A - The feed back control system and control method of test component space sidewise restraint load - Google Patents
The feed back control system and control method of test component space sidewise restraint load Download PDFInfo
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- CN109100211A CN109100211A CN201810854043.4A CN201810854043A CN109100211A CN 109100211 A CN109100211 A CN 109100211A CN 201810854043 A CN201810854043 A CN 201810854043A CN 109100211 A CN109100211 A CN 109100211A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B11/00—Automatic controllers
- G05B11/01—Automatic controllers electric
- G05B11/36—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential
- G05B11/42—Automatic controllers electric with provision for obtaining particular characteristics, e.g. proportional, integral, differential for obtaining a characteristic which is both proportional and time-dependent, e.g. P.I., P.I.D.
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Abstract
The feed back control system and control method of a kind of test component space sidewise restraint load, wherein feed back control system includes loading device and restraint device；Loading device has one group, and longitudinal side of test component is arranged in；The node of each loading device and test component is correspondingly arranged, to apply the load of main loading direction to node；Restraint device has one group, and the lateral side of test component, the lateral displacement to restraint joint is arranged in；In the opposite side of each restraint device, it is arranged with the first displacement measuring device；First displacement measuring device is displaced to measure the practical sidewise restraint of corresponding position on test component；One group of second displacement measuring device is disposed in the opposite side of every group of loading device；Practical main loading direction displacement of the second displacement measuring device to measure corresponding node on test component.The present invention solves the lower technical problem of accuracy and confidence that the boundary condition that component in traditional experiment constrains is difficult to accurate reproduction and test result.
Description
Technical field
Experimental Mechanics field of the present invention, and in particular to sidewise restraint adds in space for a kind of test component of civil engineering structure
Deformation component feedback under carrying.
Background technique
It is huge that building structure is typically due to figure, to be limited to the constraint of economic and experimental enviroment, it is difficult to carry out full size knot
Structure test.Position is studied in key position or stress complex set in the currently used general selecting structure of test method.This
The structural elements that sample is chosen carries out mechanical property research and inevitably needs to restore the true stress in component boundary, namely
It is the boundary condition reproduction of component.However be limited to technical conditions, usually only to freedom degree sensitive in the freedom degree of component boundary into
Row node constraint, but due to component in the structure with overall structure movement, motion process and mode it is complicated and changeable and examination
Displacement and the corner variation for testing middle constrained freedom degree are related with structure mass motion, therefore the conclusion obtained in this way and structure are true
Real force-bearing situation is had any different.
Summary of the invention
The invention proposes the deformation component feed back control systems and control method of a kind of space sidewise restraint load, to solve
Boundary condition is difficult to the technical problem accurately reproduced and the accuracy of test result is lower in certainly traditional test method.
Technical solution of the present invention is as follows.
A kind of deformation component feed back control system of space sidewise restraint load, include loading device, restraint device and
Displacement measuring device；Longitudinal side of test component is arranged in the loading device at least one group；Wherein, every group of load dress
Vertically parallel interval arrangement is set, and the node location of each loading device and test component is correspondingly arranged；The load dress
The free end set is connected horizontally on test component, to apply lateral load to node；The restraint device has one group, setting
In the lateral side of test component；Wherein, the free end of restraint device is connected horizontally on test component, to restraint joint
Length travel；Institute's displacement measurement device has one group, and the opposite side of restraint device is arranged in, to measure longitudinal position of test component
It moves.
Preferably, the test component is reinforced concrete frame structure component or is steel structure member.
Preferably, the outside of the loading device and restraint device is equipped with counter force wall；The fixing end of the loading device with
Counter force wall connection, the free end of loading device and test component bolt consolidate；The fixing end and counter force wall of the restraint device connect
It connects, the free end of restraint device and test component bolt consolidate；Reaction frame, displacement measurement are equipped on the outside of institute's displacement measurement device
The fixing end of device is fixedly connected with reaction frame；The free end of displacement measuring device and test component are articulated and connected.
Preferably, the loading device, restraint device and displacement measuring device three are connected with computer, the computer
The practical sidewise restraint displacement of load information and displacement measuring device acquisition to the loading device receivedDivided
Analysis judgement.
A kind of control method of the deformation component feed back control system of space sidewise restraint load, includes the following steps.
Step 1: arranging loading device in longitudinal side of test component, while being filled in the opposite side layout constraints of test component
It sets and displacement measuring device；Wherein, loading device, restraint device and displacement measuring device are arranged in the sensitive stress of test component
At point.
Step 2: to setting the corresponding lateral constrained displacement of target at each sensitive stress point of test component
Step 3: determining control parameter K in proportional plus integral control algorithmp、Ki；Wherein, KpIt is scale parameter, KiIt is integral ginseng
Number, and select the loading velocity control parameter of loading device.
Step 4: being loaded using loading device, while corresponding to sensitive receptor 1 using displacement measuring device acquisition test component
Practical sidewise restraint displacement at force
Step 5: practical sidewise restraint displacement at the sensitive stress point of comparative test componentWith target sidewise restraint
DisplacementAnalyze the error between practical sidewise restraint displacement and the lateral constrained displacement of target
Step 6: whenGreater than prescribed requirement error when, obtain displacement correction order, and by the displacement correction order
Loading device is fed back to, loading device is modified the numerical value of load after receiving displacement correction order, then proceedes to add
It carries.
Step 7: the process of step 4 to step 6 is repeated, untilLess than the error of prescribed requirement, boundary amendment is completed.
Preferably, the sensitive stress point in step 1 is frame joint or is primary and secondary beam nodes or is bean column node.
Preferably, the calculation formula of proportional plus integral control algorithm is in step 3Wherein, Δ t is the displacement meter sampling interval,For displacement correction order.
Preferably, in step 4, loading device exports load information to computer, and simultaneous displacement measuring device will acquire
Test component practical sidewise restraint displacementIt exports to computer, is analyzed and determined by computer；
Step 6: whenGreater than prescribed requirement error when, obtain displacement correction order method particularly includes: using calculate
Machine program pre-set control algorithm, to formulaIt is calculated, show that displacement correction is ordered
It enables
Preferably, in step 6 whenLess than prescribed requirement error when, complete boundary amendment, operation stop.
Compared with prior art the invention has the characteristics that and beneficial effect.
1, the method for the present invention is that the constraint freedom degree to test component carries out control load, by the opposite side of restraint device
It arranges that displacement measuring device carries out error monitoring, using feedback, loading device is adjusted by algorithm and is loaded, is protected
The card constraint high-precision simulation real border condition of freedom degree.
2, the control method in the present invention arranges displacement measuring device monitoring test structure in the sensitive stress point of test component
Part constraint direction change in displacement is analyzed its error, is made by the sampled result and expected displacement comparison of external displacement measuring device
It is adjusted, is revised the boundary with the order that program pre-set control algorithm completes sidewise restraint device, displacement measuring device and loading device
Condition reaches the accurate simulation effect of component restrained boundary；It solves boundary condition in traditional experiment to be difficult to accurately reproduce situation, mention
The confidence level of high test result.
3, the load control of the control method of the invention space sidewise restraint of structure suitable for civil engineering test, should
Method can carry out high-precision Bit andits control to sidewise restraint node, correct test component lateral displacement in time, guarantee test is pressed
The simulation of boundary condition and the application of load are completed according to default purpose.
Detailed description of the invention
Fig. 1 is the front view of deformation component feed back control system in the present invention.
Fig. 2 is the top view of deformation component feed back control system in the present invention.
Fig. 3 is the side view of deformation component feed back control system in the present invention.
Appended drawing reference: 1- loading device, 2- restraint device, 3- displacement measuring device, 4- test component, 4.1- are vertical
Column, 4.2- Vierendeel girder, 5- counter force wall, 6- reaction frame.
Specific embodiment
As shown in Figure 1-3, the deformation component feed back control system of this space sidewise restraint load, includes loading device
1, restraint device 2 and displacement measuring device 3；The loading device 1 has one group, and the left side of test component 4 is arranged in；Wherein, often
Group loading device 1 vertically arrange by parallel interval, and each loading device 1 and the node location of test component 4 are correspondingly arranged；
The free end of the loading device 1 is connected horizontally on test component 4, to apply lateral load to node；It is described about to get one's things ready
2 at least one groups are set, the lateral side of test component 4 is set；Wherein, every group of restraint device 2 vertically arrange by parallel interval,
And it is corresponding with loading device 1；The free end of the restraint device 2 is connected horizontally on test component 4, to the vertical of restraint joint
To displacement；3 at least one group of institute's displacement measurement device, is arranged in the opposite side of restraint device 2, to measure test component 4
Length travel, and length travel is fed back into restraint device 2.
In the present embodiment, the test component 4 is reinforced concrete frame structure component, includes column 4.1 and connection
Vierendeel girder 4.2 between adjacent columns 4.1；The left side of the test component 4 and rear side are equipped with counter force wall 5；The load
Device 1 is connected horizontally between the counter force wall and column 4.1 in left side, and each loading device 1 is corresponding with beam-column connection
Setting；Wherein, the fixing end of loading device 1 and 5 bolt of counter force wall consolidate, and the free end of loading device 1 and 4.1 bolt of column are solid
Knot；The restraint device 2 is connected horizontally between the counter force wall and column 4.1 of rear side, the group number and column 4.1 of restraint device 2
Radical be adapted, and each restraint device 2 is correspondingly arranged with beam-column connection；Wherein, the fixing end of restraint device 2 with
5 bolt of counter force wall consolidation, the free end of restraint device 2 and 4.1 bolt of column consolidate；It is equipped on front side of institute's displacement measurement device 3
Reaction frame 6, each displacement measuring device 3 are arranged in the opposite side of each restraint device 2；Wherein, the fixing end of displacement measuring device 3
It is consolidated with 6 bolt of reaction frame, the free end of displacement measuring device 3 and column 4.1 are articulated and connected.
Certainly in other embodiments, the test component 4 can also be steel structure member；The loading device 1 is at least
It is disposed with one group, longitudinal side of test component 4 is set；Wherein, every group of loading device 1 vertically arrange by parallel interval, and
And the node location of each loading device 1 and test component 4 is correspondingly arranged.
In the present embodiment, the loading device 1, restraint device 2 and 3 three of displacement measuring device are connected with computer,
The practical sidewise restraint of acquisition is displaced by loading device 1 by load information, displacement measuring device 3It exports to computer,
The computer is displaced the practical sidewise restraint of load information and displacement measuring device 3 acquisition of the loading device 1 receivedIt is analyzed and determined, then analysis result is fed back into loading device 1.
The control method of the deformation component feed back control system of this space sidewise restraint load, on test component 4
Typical stress point and constraint direction carry out displacement monitoring, and Acquisition Error information is analyzed by control algolithm, obtain load control life
It enables, corrects the displacement and counter-force of component constraint direction, guarantee that boundary condition meets expection；This method comprises the following steps.
Step 1: arranging loading device 1 in the left side of test component 4, while being filled in the rear side layout constraints of test component 4
It sets 2, arrange displacement measuring device 3 in the front side of test component 4；Wherein, loading device 1, restraint device 2 and displacement measuring device
3 are arranged in the frame joint of test component 4 or are primary and secondary beam nodes or are bean column node.
Step 2: corresponding in every step loading procedure to being set at each sensitive stress point of test component 4 in a computer
The lateral constrained displacement of targetWherein, subscript m is obligatory point number, and subscript i is load step number, is hereafter got the bid
It infuses identical.
Step 3: determining control parameter K in proportional plus integral control algorithmp、Ki；Wherein, KpIt is scale parameter, KiIt is integral ginseng
Number；While guaranteeing that loading control stablizes, selection is suitable for the loading velocity control parameter of this loading device 1；Control parameter
KpAnd KiDetermination method it is more, here using gradually amplification test method be determined.
Step 4: being loaded using loading device 1, while quick using the acquisition correspondence of test component 4 of displacement measuring device 3
Experience the practical sidewise restraint displacement at forceLoading device 1 exports load information to computer, simultaneous displacement
The practical sidewise restraint of the test component 4 of acquisition is displaced by measuring device 3It exports to computer, is carried out by computer
It analyzes and determines.
Step 5: practical sidewise restraint displacement at the sensitive stress point of comparative test component 4Laterally about with target
Beam displacementAnalyze the error between practical sidewise restraint displacement and the lateral constrained displacement of targetWherein,It is the loading error that m-th of obligatory point corresponds to current i-th step.
Step 6: whenGreater than prescribed requirement error when, computer use computer program pre-set control algorithm, to public affairs
Formula It is calculated, obtains displacement correction orderAnd by the displacement
Amendment order feeds back to loading device 1, restraint device 2 and displacement measuring device 3；Restraint device 2 receives displacement correction order
Afterwards, constraint reaction is modified, after displacement measuring device 3 receives displacement correction order, the displacement of constraint direction is carried out
Amendment；Loading device 1 is modified the numerical value of load after receiving displacement correction order, then proceedes to load.
Step 7: while loading device 1 loads component, each restraint device 2 and displacement measuring device about at end node
3 execute each self-correction orderAcquisition Error information simultaneously calculates the amendment order loaded next time；Repeat step 4
To the process of step 6, untilLess than the error of prescribed requirement, boundary amendment is completed；The modified standard in boundary is completed by testing
Person voluntarily formulates, and can beLess than 1mm, it is also possible toLess than 0.1mm.
In the present embodiment, loading device 1, restraint device 2 and displacement measuring device 3 in step 1 can also be arranged in it
He by experimenter according to the certain structure nodes or position for testing demand setting himself.
The lateral constrained displacement of target in the present embodiment, in step 2It is that experimenter wants the position for allowing test specimen to realize
It moves, how to determine then by experimenter according to its test objective self-setting.
In the present embodiment, in step 6 whenLess than prescribed requirement error when, complete boundary amendment, operation stop.
Content described in this specification embodiment is only enumerating to the way of realization of inventive concept, protection of the invention
Range should not be construed as being limited to the specific forms stated in the embodiments, and protection scope of the present invention covers those skilled in the art
Member according to the present invention design it is conceivable that equivalent technologies mean.
Claims (9)
1. a kind of feed back control system of test component space sidewise restraint load, it is characterised in that: include loading device (1)
With restraint device (2)；The loading device (1) has one group, is arranged in longitudinal side of test component (4)；Wherein, every group of load
Device (1) vertically arrange by parallel interval, and each loading device (1) and the node of test component (4) are correspondingly arranged；It is described
The free end of loading device (1) is connected horizontally on test component (4), to apply the load of main loading direction to node；Institute
Stating restraint device (2) has one group, is arranged in the lateral side of test component (4)；The free end level of the restraint device (2) connects
It connects on test component (4), the lateral displacement to restraint joint；On test component (4), it is located at each restraint device (2)
Opposite side, be arranged with the first displacement measuring device (3)；First displacement measuring device (3) is to measure test component (4)
The practical sidewise restraint of upper corresponding position is displacedPair on test component (4), positioned at every group of loading device (1)
Side, transversely parallel interval is disposed with one group of second displacement measuring device (5)；The second displacement measuring device (5) to
Measure the practical main loading direction displacement of corresponding node on test component (4)
2. a kind of feed back control system of sidewise restraint load in test component space according to claim 1, feature exist
In: the test component (4) is reinforced concrete frame structure component or is steel structure member.
3. a kind of feed back control system of sidewise restraint load in test component space according to claim 1, feature exist
In: the outside of the loading device (1) and restraint device (2) is equipped with counter force wall (6)；The fixing end of the loading device (1) with
Counter force wall (6) connection, the free end of loading device (1) and test component (4) bolt consolidate；The fixation of the restraint device (2)
End is connect with counter force wall (6), and the free end of restraint device (2) and test component (4) bolt consolidate；The first displacement measurement dress
It sets and is equipped with the first reaction frame (7) on the outside of (3)；The fixing end of first displacement measuring device (3) and the first reaction frame (7) are fixed
Connection, the free end and test component (4) of the first displacement measuring device (3) are articulated and connected；The second displacement measuring device (5)
Outside is equipped with the second reaction frame (8)；The fixing end of the second displacement measuring device (5) is fixedly connected with the second reaction frame (8),
The free end and test component (4) of second displacement measuring device (5) are articulated and connected.
4. a kind of feed back control system of sidewise restraint load in test component space according to claim 1, feature exist
In: the loading device (1), restraint device (2), the first displacement measuring device (3) and second displacement measuring device (5) four are equal
It is connected with computer；Computer acquires load information, the first displacement measuring device (3) of the loading device (1) received
Practical sidewise restraint displacementWith the practical main loading direction displacement of second displacement measuring device (5) acquisitionInto
Row analyzes and determines.
5. the feed back control system of the load of test component space sidewise restraint described in a kind of any one of claim 1-4
Control method, which comprises the steps of:
Step 1: arrangement loading device (1), restraint device (2), the first displacement measuring device (3) and second displacement measuring device
(5)；
Step 2: distance L of the record the first displacement measuring device (3) from fixing end to hinged end1, and record second displacement measurement dress
Set the distance L of (5) fixing end to hinged end2；
Step 3: change in displacement expected from the sidewise restraint of setting test component (4), i.e., target is lateral in every step loading procedure
Constrained displacement
Step 4: determining control parameter K in proportional plus integral control algorithmpAnd Ki, and select the load speed of this loading device (1)
Spend control parameter；Wherein, KpIt is scale parameter, KiIt is integral parameter；
Step 5: test component (4) being loaded using loading device (1)；It is adopted simultaneously using the first displacement measuring device (3)
Collect the practical sidewise restraint displacement of test component (4) each obligatory pointIt is acquired and is tried using second displacement measuring device (5)
Test the practical main loading direction displacement of component (4) each obligatory point
Step 6: practical sidewise restraint displacement at the sensitive stress point of comparative test component (4)Practical main loading direction
DisplacementWith mark sidewise restraint displacementAnalyze existing error When being that m-th of obligatory point corresponds to the load of current i-th step
Lateral displacement actual deviation；
Step 7: whenGreater than prescribed requirement error when, obtain displacement correction orderAnd the displacement correction is ordered
It enablesIt feeds back to loading device (1), loading device (1) is receiving displacement correction orderAfterwards, to load
Numerical value is modified, and then proceedes to load；Wherein,For m-th of obligatory point correspond to the load of current i-th step when position
Move amendment order；
Step 8: the process of step 5 to step 7 is repeated, untilLess than the error of prescribed requirement, boundary amendment is completed.
6. the control method of the feed back control system of test component space according to claim 5 sidewise restraint load,
Be characterized in that: loading device described in step 1 (1) is arranged in longitudinal side of test component (4)；The second displacement measurement dress
Set the opposite side that (5) are arranged in loading device (1)；The restraint device (2) is arranged in the lateral side of test component (4)；It is described
The opposite side of first displacement measuring device (3) restraint device (2)；Wherein, loading device (1), (2) first displacement measurement of restraint device
Device (3) and second displacement measuring device (5) are arranged at the sensitive stress point of test component (4)；Wherein, sensitive stress point
It for primary and secondary beam nodes or is bean column node.
7. the control method of the feed back control system of test component space according to claim 5 sidewise restraint load,
It is characterized in that: K in step 4pAnd KiIt is determined using gradually amplification test method.
8. the control method of the feed back control system of test component space according to claim 7 sidewise restraint load,
It is characterized in that: load information, practical sidewise restraint displacement in step 5It is displaced with practical main loading direction
Then equal synchronism output is analyzed and determined to computer by computer；In step 7 whenGreater than the error of prescribed requirement
When, the adjustment of restraint device (2) displacement command is completed using proportional plus integral control algorithm, specifically: it is default using computer program
Proportional plus integral control algorithm, to formulaIt is calculated, obtains displacement correction
OrderWherein, Δ t is the displacement meter sampling interval.
9. the control method of the feed back control system of test component space according to claim 5 sidewise restraint load,
It is characterized in that, in step 7 whenLess than prescribed requirement error when, complete boundary amendment, operation stop.
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| CN201810854043.4A CN109100211B (en) | 2018-07-30 | 2018-07-30 | Control method of feedback control device for space lateral constraint loading of test component |
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| CN201810854043.4A CN109100211B (en) | 2018-07-30 | 2018-07-30 | Control method of feedback control device for space lateral constraint loading of test component |
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| JPS6122230A (en) * | 1984-07-10 | 1986-01-30 | Shimadzu Corp | Preventing device of overload of material tester |
| CN105092223A (en) * | 2015-06-19 | 2015-11-25 | 重庆大学 | Integral stabilization test loading system of steel beam with lateral constriction under effect of single point loading |
| CN106996900A (en) * | 2017-05-16 | 2017-08-01 | 华北理工大学 | Axial push-pull experimental rig and its test method under effect of contraction |
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