CN109163868A - A kind of rigidity testing system and method for cantilever beam class elastic element - Google Patents
A kind of rigidity testing system and method for cantilever beam class elastic element Download PDFInfo
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- CN109163868A CN109163868A CN201811206701.5A CN201811206701A CN109163868A CN 109163868 A CN109163868 A CN 109163868A CN 201811206701 A CN201811206701 A CN 201811206701A CN 109163868 A CN109163868 A CN 109163868A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
- G01M5/0058—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems of elongated objects, e.g. pipes, masts, towers or railways
Abstract
The invention discloses the rigidity testing systems and method of a kind of cantilever beam class elastic element.The system includes: clamping device, force loading device, measuring device and computer, clamping device includes electronic index dial, pneumatic pinch tooling, electronic index dial and pneumatic clamping tool will be fixed vertically by test specimen, force loading device and measuring device are mounted in vertical lift device, force loading device includes linear motor and thimble, measuring device includes force snesor and distance measuring sensor, the output end of linear motor rigidly installs force snesor, the thimble coaxial with linear motor output shaft is installed on force snesor, the axis of thimble is vertical with by the axis of test specimen, the deformation of distance measuring sensor measurement force snesor, force sensor measuring is by the stress of test specimen, the stress value by test specimen that computer is measured according to measuring device, the displacement of linear motor and the deflection of force snesor are determined to by the rigidity of test specimen.The present invention has the advantage that measurement consistency is high, precision is high and manual labor's intensity is small.
Description
Technical field
The present invention relates to detection technique fields, a kind of rigidity testing system more particularly to cantilever beam class elastic element and
Method.
Background technique
Electrohydraulic servo valve be it is a kind of be widely used in space flight, aviation, navigational field electro-hydraulic converting element, wherein feeding back
Bar and bourdon tube are the critical elements of electrohydraulic servo valve, and performance directly affects electrohydraulic servo valve dynamic and static state performance.Therefore, it detects
Feedback rod, the rigidity value of bourdon tube and its consistency are to guarantee the important means of electro-hydraulic servo valve performance.
The detection method of existing rigidity value mainly has Manual hoisting counterweight method, capacitor gauge head displacement method, single armed force two
Point mensuration and CCD optical location move method.In the method for Manual hoisting counterweight, entire measurement process is surveyed by manually realizing
Amount method human factor is affected, and measures for a long time, and personnel's naked eyes are easy fatigue, causes measurement data to be distorted, Bu Nengman
Sufficient parts measurement data consistency requirement；Capacitor gauge head displacement method finds the initial position of precision element first, then makes to lead
Rail moves a distance, measures deformation quantity under the interaction of feedback rod and dynamometer spring, calculates rigidity further according to formula
Value, the accuracy of this method increase, but the capacitive displacement transducer used in experiment is more demanding to ambient enviroment,
Practical application is relatively difficult；Single armed exerts a force Two-Pointed Method based on two-point measurement principle, calculates rigidity according to Stiffness tester formula
Value, can effectively eliminate influence of the extraneous factors such as parallel resistance stain foil force sensor temperature drift, creep to measurement accuracy, mention
High measurement accuracy, and the step of reducing force snesor zeroing, the step of simplifying measurement, but the mechanical part of this method
Design is complicated, inconvenience operation；CCD optical location moves method and acquires image with CCD and then make further of computer to image
Processing, but CCD image blur can not focus, and measurement accuracy is poor, and to lack flexibility, cost high for rigidity instrument.
Summary of the invention
The object of the present invention is to provide the rigidity testing systems and method of a kind of cantilever beam class elastic element, have measurement one
The advantage that cause property is high, precision is high and manual labor's intensity is small.
To achieve the above object, the present invention provides following schemes:
A kind of rigidity testing system of cantilever beam class elastic element, the test macro include: clamping device, power load dress
It sets, measuring device and computer, the clamping device include electronic index dial, pneumatic pinch tooling and vertical lift device, institute
Stating electronic index dial and pneumatic clamping tool will be fixed vertically by test specimen, and the force loading device and the measuring device are mounted on
In the vertical lift device, the force loading device includes linear motor and thimble, and the measuring device includes force snesor
And distance measuring sensor, the output end of the linear motor rigidly install the force snesor, be equipped on the force snesor with
The coaxial thimble of the linear motor output shaft, the axis of the thimble is vertical with by the axis of test specimen, and the ranging passes
Sensor measures the deflection of force snesor, and the force sensor measuring is by the stress of test specimen, and the computer is according to the measurement
The deflection by the stress value of test specimen, the displacement of linear motor and force snesor of device measurement is true to being carried out by the rigidity of test specimen
It is fixed.
Optionally, the linear motor has position loop system, closes for the displacement to the linear motor
Ring control, and by the displacement real-time Transmission of linear motor to computer.
Optionally, the order of magnitude of the displacement minimum resolution of the linear motor closed-loop control system is than by the maximum of test specimen
Small two orders of magnitude of the order of magnitude of deflection.
Optionally, the distance measuring sensor is laser micrometering quantity sensor, for measuring the deflection of force snesor.
Optionally, the test macro further includes cross bar, and the cross bar is mounted in the vertical lift device, the power
Loading device and measuring device installation are on the cross bar.
Optionally, vertical baffle is provided on the cross bar, the laser micrometering quantity sensor measures the vertical baffle
Distance change obtain the deflection of force snesor, the computer obtains according to the variable quantity of the displacement of the vertical baffle
The deflection of force snesor is calculated by the displacement of test specimen, according to by the position of test specimen in conjunction with the output displacement of linear motor
The relationship obtained by the stress value of test specimen by the power of test specimen and deformation that shifting amount and force snesor measure.
Optionally, the test macro further includes CCD camera, and the CCD camera is for observing thimble and by test specimen
Whether it is aligned.
The present invention also provides a kind of stiffness test method of cantilever beam class elastic element, the method is applied to the present invention
The rigidity testing system of the cantilever beam class elastic element of offer, which comprises
It will be stepped up by test specimen using clamping device；
Thimble is aligned with by test specimen；
Force loading device applies the loading force that continuously enlarges to by test specimen；
Measuring device measures change in displacement force snesor deformation quantity obtained from, straight of baffle corresponding to each loading force
Line motor output displacement and stress by test specimen；
The deformation quantity for the displacement and force snesor that computer is exported according to linear motor is calculated by the deflection of test specimen；
Computer is obtained according to by the deflection of test specimen and by the Force Calculation of test specimen by the stiffness characteristics of test specimen.
Optionally, the method also includes:
Computer using the method that is combined with least-squares linear regression of modeling to collected displacement data and by
Force data is handled.
Optionally, the method also includes: part is tested by the electronic indexing disc spins, to realize to by test specimen circumference
The load of the power of upper all directions and rigidity test.
The specific embodiment provided according to the present invention, the invention discloses following technical effects: the present invention passes through electronic point
Scale and pneumatic pinch tooling, power load vertical lift device composition by test specimen automatic clamping device, realize circumferencial direction
The power of different angle loads, and meets the requirement that different length is measured by test specimen；Using with high-resolution straight-line electric seat in the plane
The power load and its measuring device for setting closed-loop system, realize the measurement to applied force；By carrying Laser Measuring micro-displacement sensor
Deformation of elastic element and its device for accurately measuring, measure force snesor elastic deformation due to caused by stress, accurately
To by the relationship of test specimen power, displacement；Computer control acquisition and Measurement and Data Processing system complete by test specimen automatic clamping device,
Power load and its measuring device driving and control and the measurement of electronic index dial angle feed-back, load linear motor position closed loop
System position measurement, the output of Laser Measuring micrometering quantity sensor measurement etc., and result is output in computer and is handled, it obtains
To by the rigidity value and stiffness curve of test specimen；Measurement observation device based on CCD uses the CCD with certain amplification factor to take the photograph
Camera, observation sensor front end thimble with by the contact situation of test specimen, convenient for being observed when testing.Cantilever beam provided in the present invention
The rigidity testing system and method for class elastic element, can reduce the labor intensity of operating personnel, and from source reduce it is artificial because
Error caused by element, to improve the consistency and precision of measurement.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the test macro schematic diagram of cantilever beam of embodiment of the present invention class elastic element rigidity；
Fig. 2 is the test macro operational flowchart of cantilever beam of embodiment of the present invention class elastic element rigidity；
Fig. 3 is device for testing stiffness of embodiment of the present invention software implementation process figure；
Fig. 4 is modeling of the embodiment of the present invention and least square combined data processing method flow chart；
Fig. 5 is stiffness measurement of embodiment of the present invention matched curve figure.
1, electronic index dial；2, workbench；3, pneumatic pinch tooling；4, by test specimen；5, vertical baffle；6, force snesor；
7, distance measuring sensor；8, vertical lift device；9, linear actuator；10, straightline controller；11, computer
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The object of the present invention is to provide the rigidity testing systems and method of a kind of cantilever beam class elastic element, have measurement one
The advantage that cause property is high, precision is high and manual labor's intensity is small.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Fig. 1 is the test macro schematic diagram of cantilever beam of embodiment of the present invention class elastic element rigidity, as shown in Figure 1, this hair
The test macro of the cantilever beam class elastic element rigidity of bright offer includes: clamping device, force loading device, measuring device and calculating
Machine, the clamping device include electronic index dial 1, pneumatic pinch tooling 3 and vertical lift device 8, electronic 1 He of index dial
Pneumatic pinch tooling 3 will be fixed vertically by test specimen 4, and the force loading device and the measuring device are mounted on the vertical lift
On device 4, the force loading device includes linear motor and thimble, and the measuring device includes force snesor 6 and ranging sensing
Device 7, the output end of the linear motor are rigidly installed the force snesor 6, are equipped with and the straight line on the force snesor 6
The coaxial thimble of motor output shaft, the axis of the thimble is vertical with by the axis of test specimen 3, and the distance measuring sensor 7 is surveyed
It measures one's own ability the deflection of sensor 6, by the stress of test specimen 3, the computer 11 is filled according to the measurement for the measurement of force snesor 6
Set being determined by the stress value of test specimen 3 and displacement to by the rigidity of test specimen 3 for measurement.The distance measuring sensor 7 is laser
Micrometering quantity sensor.The test macro further includes cross bar, and the cross bar is mounted in the vertical lift device 8, the power
Loading device and measuring device installation are on the cross bar.Vertical baffle 5, the laser micrometering are provided on the cross bar
Quantity sensor measures the displacement variable of the vertical baffle 5 to obtain the deflection of force snesor 6,11 basis of computer
The displacement variable of the vertical baffle 5 obtains the deflection of force snesor 6 in turn, and according to the change of linear motor output displacement
Change is calculated by the deflection of test specimen 3, according to the stress by test specimen measured by the deflection of test specimen 3 and force snesor 6
Value obtains the relationship by the power of test specimen 3 and deflection.The test macro further includes linear motor closed-loop control subsystem, is used for
Closed-loop control is carried out to the displacement of the linear motor.The displacement minimum resolution of the linear motor closed-loop control subsystem
It should be less than by a certain percentage of the maximum deformation quantity of test specimen 3.The test macro further includes CCD camera, the CCD camera
Whether it is aligned for observing thimble with by test specimen 3.
Wherein, 1) by test specimen clamping device
It is mainly made of electronic index dial and pneumatic pinch tooling, power load vertical lift device by test specimen clamping device.
By computer software, realize that remote boot server stepper motor is automatically continuously loaded to by test specimen, and have centainly
Load resolution ratio.Wherein: electronic index dial and pneumatic pinch tooling are responsible for by the loading of test specimen and clamping, and according to by test specimen
Measurement request realizes by 360 degree of test specimen measurement demand at any angle, satisfaction by the stiffness measurement of test specimen circumference all directions and
Circumference all directions rigidity consistency detection；Power loads the load of vertical lift device drive and its measuring device and flexible deformation essence
True measuring device combination is moved along vertical guide rail, is precisely aligned by the point of application of test specimen, to meet different length by test specimen
The requirement of measurement, to guarantee the accuracy of the cantilever beam arm of force.
2) power load and its measuring device
Power load and its measuring device, which use, has high-resolution linear motor position loop system, and in linear motor
Output end install additional force snesor, through force snesor and its front end thimble act on by test specimen implement load.Force snesor and
Its transmitter, which will act on, is converted to electric signal by the power on test specimen, the measurement for power.
The power of each measurement point in loading procedure is measured, makes tested elastic element first by auto-loading system first
It is fixed on a height, then, by computer software control linear actuator applied force on by test specimen, then will be surveyed
Result is measured by force snesor conditioning circuit and data collection system, transfers data to and carries out power measurement result in computer
Processing and storage.
In measurement scheme of the invention, the displacement minimum resolution of linear motor is less than by a certain of test specimen maximum deformation quantity
Percentage.By load linear motor continuous dislocation closed loop output, it is available by test specimen from 0 to maximum distortion displacement number
According to.
3) deformation of elastic element and its measuring device
The present invention by Laser Measuring micro-displacement sensor be mounted on load linear motor on, for measure force snesor due to by
Elastic deformation caused by power.By load linear motor closed-loop system obtain load relative displacement, force snesor institute's dynamometry with
And force snesor deformation measured by Laser Measuring micrometering quantity sensor, it can be accurately obtained by test specimen power, the relationship of displacement.By
In elastic element, deformation occurs under stress condition, causes the displacement measured that can have deviation, to solve this problem, draws
Vertical baffle is entered, has proposed force snesor and deform modified displacement detecting method, according to the displacement and power of vertical baffle
The deflection of sensor is calculated by the displacement of test specimen, eliminate due to force snesor deformation and elastic element by
It is caused by test specimen deformation measurement error that deformation occurs in the case of power, further improves by the accurate of test specimen stiffness measurement
Degree.
4) computer control acquisition and Measurement and Data Processing
The detection for realizing rigidity value, other than above-mentioned hardware system, it is also necessary to computer software supports,
It realizes the drive control to various pieces, carry out data acquisition, conditioning and processing to the result detected, computer software is realized
Function there are also output stiffness curves and rigidity value, and achieve, software interface is friendly, hommization, adapts to different model feedback
The detection of the elastic element rigidities such as bar, bourdon tube.
Computer control acquisition and Measurement and Data Processing system are the central hubs of stiffness measurement system, undertake and survey to rigidity
Measure the control of each component of device, the acquisition of measuring signal, data analysis and process function, be to realize accurate elastic element rigidity
The essential link of automatic measurement.Computer control acquisition and measurement data and processing part are responsible for: 1. electronic index dials,
Driving and the controls such as pneumatic pinch tooling, power load vertical lift device, load linear motor position loop system；2. being responsible for electricity
Dynamic index dial angle feed-back measurement, the measurement of load linear motor position loop system position, Laser Measuring micrometering quantity sensor it is defeated
Measurement etc. out, these measured values are transferred in computer by number bus or analog-to-digital conversion；3. pair acquisition force value data and
Displacement data carries out processing and operation, obtains by the rigidity value and stiffness curve of test specimen.
The method of computer digital animation is directly related to the precision of stiffness measurement, is less than to meet the repetitive error of measurement
± 1%, measurement accuracy requirement of the systematic measurement error no more than 1 μm, the present invention is using modeling and least-squares linear regression phase
In conjunction with the data processing method compensated to the deformation of force snesor.On-line intelligence calibration function is added simultaneously, realizes subject
Part deflection and the synchro measure of power further improve the precision measured by test specimen.
5) CCD camera observes device
Measurement observation device based on CCD camera uses the CCD camera with certain amplification factor, when convenient for test
Observe sensor front end thimble with by the contact situation of test specimen.In the present invention, there is certain amplification factor using the imaging of CCD
Principle, fixed-focus is in by test specimen and thimble contact point, reaching online observation by the deformation of test specimen and the point of application to agreeing to do a favour
The purpose of condition.
The operating process of the test macro of cantilever beam class elastic element rigidity provided by the invention is as shown in Fig. 2, based on this
The test macro that the cantilever beam class elastic element rigidity provided is provided, in test, as shown in figure 3, the software system of detection system
System mainly includes early-stage preparations link, automatic measurement link, data processing link.Firstly, measured piece is placed on workbench,
And clamped with air-actuated jaw, it selects the initial parameter of electronic index dial, be vertically moved up or down the elemental height of guide rail, and ensure thimble pair
Standard is by test specimen；Then clicking operation interface start measure button, start to load the rigidity of measured piece automatically, measuring force
Value and shift value complete force signal, the acquisition of displacement signal is read, calculated rigidity value and described point drawing, display output measured piece
Mean rigidity value and the obtained stiffness curve of processing；After being measured, click data save button protects measurement result
It deposits, and can be printed measurement result by external printer.Such as to continue to measure, only need to repeat aforesaid operations step i.e.
It can.
Carrying out processing to the data of measurement in detection system is essential link, and data processing is directly related to detection
The precision of system, this process needs a large amount of function model, and then is showed in a manner of linear regression model (LRM), minimum two
Multiplication is regression coefficient calculation method the most classical.It finds the optimal function of data by the quadratic sum of minimal error
Match, the flow chart of data processing is as shown in Figure 4.
If the volume of data point measured is (xi,yi) (i=1 ... .m), model the data processing in conjunction with linear regression
Step are as follows:
Step 1: establish model:
Linear regression function model are as follows: y=a0+a1x0+a2x1+…+anxn-1
Step 2: corresponding total least square adjustment Models (EIV model) and error expectation and variance are as follows:
Y+e=(B+Eβ)β
In formula, Y is the rank observation vector of m × 1, and e is the error vector of Y, and B is m × n level matrix number, EβFor the error moments of B
Battle array, β are the rank of n × 1 parameter to be estimated.vec(Eβ) it is by rectangular array vectorization, ImFor m rank unit matrix, InFor n rank unit matrix.
Step 3: total least square adjustment criterion is introduced after adjustment Models are unfolded and constructs objective function:
Objective function is solved, the coefficient value in model is acquired by iterative method.
Parametric solution is exactly the valuation a acquired in regression function model according to the principle of least square0,a1,a2,…,an, i.e.,
The measurement result curve of multiple parameter values can be obtained, as shown in Figure 5.
The present invention loads the automatic by test specimen of vertical lift device composition by electronic index dial and pneumatic pinch tooling, power
Clamping device, realizes the power load of circumferencial direction different angle, and meets the requirement that different length is measured by test specimen；Using tool
There are the power load and its measuring device of high-resolution linear motor position loop system, realizes the measurement to applied force；Pass through
The deformation of elastic element and its device for accurately measuring of Laser Measuring micro-displacement sensor are carried, measurement force snesor is drawn by stress
The elastic deformation risen, is accurately obtained by test specimen power, the relationship of deflection；Computer control acquisition and Measurement and Data Processing system
It completes to be surveyed by test specimen automatic clamping device, power load and its measuring device driving with control and electronic index dial angle feed-back
Amount, the measurement of load linear motor position loop system position, the output of Laser Measuring micrometering quantity sensor measurement etc., and result is defeated
It is handled, is obtained by the rigidity value and stiffness curve of test specimen into computer out；Measurement observation device based on CCD uses
CCD camera with certain amplification factor, observation sensor front end thimble with by the contact situation of test specimen, convenient for being seen when testing
It examines.The rigidity testing system and method for cantilever beam class elastic element provided in the present invention, can reduce the labour of operating personnel
Intensity, and error caused by human factor is reduced from source, to improve the consistency and precision of measurement.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (10)
1. a kind of rigidity testing system of cantilever beam class elastic element, which is characterized in that the test macro includes: clamping dress
It sets, force loading device, measuring device and computer, the clamping device includes electronic index dial, pneumatic pinch tooling and vertical
Lifting device, the electronic index dial and pneumatic clamping tool will be fixed vertically by test specimen, the force loading device and the survey
Amount device is mounted in the vertical lift device, and the force loading device includes linear motor and thimble, the measuring device
Including force snesor and distance measuring sensor, the output end of the linear motor rigidly installs the force snesor, the power sensing
The thimble coaxial with the linear motor output shaft is installed, the axis of the thimble hangs down with by the axis of test specimen on device
Directly, the deflection of the distance measuring sensor measurement force snesor, the force sensor measuring is by the stress of test specimen, the computer
According to the deflection by the stress value of test specimen, the displacement of linear motor and force snesor of measuring device measurement to by test specimen
Rigidity be determined.
2. the rigidity testing system of cantilever beam class elastic element according to claim 1, which is characterized in that the straight-line electric
Machine has position loop system, carries out closed-loop control for the displacement to the linear motor, and by the displacement of linear motor
Real-time Transmission is to computer.
3. the rigidity testing system of cantilever beam class elastic element according to claim 2, which is characterized in that the straight-line electric
The order of magnitude of the displacement minimum resolution of machine closed-loop control system is than by small two quantity of the order of magnitude of the maximum deformation quantity of test specimen
Grade.
4. the rigidity testing system of cantilever beam class elastic element according to claim 1, which is characterized in that the ranging passes
Sensor is laser micrometering quantity sensor, for measuring the deflection of force snesor.
5. the rigidity testing system of cantilever beam class elastic element according to claim 1, which is characterized in that the test system
System further includes cross bar, and the cross bar is mounted in the vertical lift device, the force loading device and measuring device peace
Dress is on the cross bar.
6. the rigidity testing system of cantilever beam class elastic element according to claim 4 or 5, which is characterized in that the cross
Vertical baffle is provided on bar, the laser micrometering quantity sensor measures the distance change of the vertical baffle to obtain power sensing
The deflection of device, the computer obtain the deflection of force snesor according to the variable quantity of the displacement of the vertical baffle, in conjunction with
The output displacement of linear motor is calculated by the displacement of test specimen, according to what is measured by the displacement of test specimen and force snesor
The relationship by the power of test specimen and deformation is obtained by the stress value of test specimen.
7. the rigidity testing system of cantilever beam class elastic element according to claim 1, which is characterized in that the test system
System further includes CCD camera, and the CCD camera is for observing whether thimble is aligned with by test specimen.
8. a kind of stiffness test method of cantilever beam class elastic element, which is characterized in that the method is applied to such as claim
The rigidity testing system of the described in any item cantilever beam class elastic elements of 1-7, which comprises
It will be stepped up by test specimen using clamping device；
Thimble is aligned with by test specimen；
Force loading device applies the loading force that continuously enlarges to by test specimen；
Measuring device measures change in displacement the force snesor deformation quantity, straight-line electric obtained from of baffle corresponding to each loading force
Machine output displacement and stress by test specimen；
The deformation quantity for the displacement and force snesor that computer is exported according to linear motor is calculated by the deflection of test specimen；
Computer is obtained according to by the deflection of test specimen and by the Force Calculation of test specimen by the stiffness characteristics of test specimen.
9. the stiffness test method of cantilever beam class elastic element according to claim 8, which is characterized in that the method is also
Include:
Computer is using the method that modeling is combined with least-squares linear regression to collected displacement data and stress number
According to being handled.
10. the stiffness test method of cantilever beam class elastic element according to claim 8 or claim 9, which is characterized in that the side
Method further include: be tested part by the electronic indexing disc spins, to realize to by the load of the power of all directions on test specimen circumference and
Rigidity test.
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Cited By (5)
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| CN109916581A (en) * | 2019-03-27 | 2019-06-21 | 一汽-大众汽车有限公司 | A kind of portable stiffness measuring device and method |
| CN110553829A (en) * | 2019-09-23 | 2019-12-10 | 中国船舶重工集团公司第七0七研究所 | integral flexible joint rigidity measuring device and method |
| CN111307447A (en) * | 2019-11-29 | 2020-06-19 | 重庆大学 | Bending rigidity testing system for parallel shaft output speed reducer |
| CN112326162A (en) * | 2020-09-17 | 2021-02-05 | 北京航空航天大学 | Wing elastic deformation measuring method for airborne distributed POS |
| CN113970298A (en) * | 2021-10-25 | 2022-01-25 | 北京航空航天大学 | FBG-based large-scale aerospace flexible structure overall deformation detection method |
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