CN109283075A - The wind electricity blade fatigue test exciting device and test method of servo motor driving - Google Patents
The wind electricity blade fatigue test exciting device and test method of servo motor driving Download PDFInfo
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- CN109283075A CN109283075A CN201811317121.3A CN201811317121A CN109283075A CN 109283075 A CN109283075 A CN 109283075A CN 201811317121 A CN201811317121 A CN 201811317121A CN 109283075 A CN109283075 A CN 109283075A
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 29
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- 230000008859 change Effects 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 238000006073 displacement reaction Methods 0.000 claims description 39
- 239000003921 oil Substances 0.000 claims description 21
- 238000005461 lubrication Methods 0.000 claims description 15
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- 238000002474 experimental method Methods 0.000 claims description 4
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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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
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Abstract
The present invention relates to the wind electricity blade fatigue test exciting devices and test method of a kind of driving of servo motor, the device does the simple harmonic oscillation of sinusoidal rule by Serve Motor Control centre frame, and the exciting force for driving its vibration sinusoidally changed is generated on blade.Make straight reciprocating motion using servo motor driving clump weight and generate reaction force, enables blade along waving direction or edgewise direction vibration；Its excited frequency can change at any time, and guarantee system is in resonance state always to complete the fatigue test of wind electricity blade.The fatigue test for the short period completing wind electricity blade can be achieved in the present invention, improves test efficiency, reduces cost.
Description
Technical field
The invention discloses the wind electricity blade fatigue test exciting devices and test method of a kind of driving of servo motor, belong to
Field of wind power equipment.
Background technique
Wind electricity blade is mostly using high-intensitive, high-modulus resin base fiber reinforced composite material.Fatigue behaviour is surveyed
Examination has become composite material wind-power blade design, manufactures, an important content of interest in operational process.
From the point of view of research both at home and abroad at present and application situation, the side of being mainly the following is tested in wind electricity blade fatigue test
Formula: the double hammer exciting load coupled vibration characteristics of strap of wind electricity blade and two axis of wind electricity blade of experimental study, hydraulic actuator driving are tired
The wind-powered electricity generation that labor loading system design and research, the system research of pendulum resonance type wind electricity blade fatigue loading, eccentric massblock drive
The wind electricity blade fatigue test exciting that blade fatigue test, the wind electricity blade fatigue test of electric cylinder driving and servo motor drive
Device design.
But the above wind electricity blade fatigue experimental device installation not enough facilitates, higher cost, and tests power and efficiency not
Foot, measurement result is not accurate enough, and adaptability is not good enough.
Summary of the invention
The present invention discloses a kind of wind electricity blade fatigue test exciting device of servo motor driving, it is therefore intended that makes up old-fashioned
Pendulum resonance fatigue experimental test equipment test power and efficiency on deficiency, realize low cost, high efficiency complete blade
Fatigue test improves the precision and accuracy of test.
In order to achieve the goal above, the technical solution adopted by the present invention are as follows:
A kind of wind electricity blade fatigue test exciting device of servo motor driving, waves direction for carrying out to wind electricity blade
With the composite fatigue load test of edgewise direction, comprising:
Wind electricity blade fixture is sleeved on the wind electricity blade section section, including offer profiling hole cramping body and
The frame being sleeved on outside the cramping body, the cramping body have structure symmetrical above and below, and the frame includes:
The upper mounting surface and lower mounting surface extended along the x axis, be respectively equipped on the upper mounting surface and lower mounting surface with
The mounting hole that exciting unit is connected and fixed when experiment, is symmetrically installed a set of exciting unit on upper mounting surface and lower mounting surface, uses
To drive wind electricity blade to realize blade tangential vibrations；
The left side mounting surface and right side mounting surface extended along the y axis, on the left side mounting surface and right side mounting surface point
The mounting hole that She You not be connected and fixed with exciting unit when experiment, is symmetrically installed one on left side mounting surface and right side mounting surface
Exciting unit is covered, to drive wind electricity blade to realize blade towards vibration；
The exciting unit includes:
Rack is enclosed by four rod pieces and is had rectangular enclosure, and the upper end of rack is provided with straight-line displacement driving machine
Structure, the driving end of the straight-line displacement driving mechanism is sequentially connected with the linear movement part being arranged in rectangular enclosure, described
Straight moving part point includes centre frame, is symmetrically arranged with two centre frame lids on separate rack two sides on centre frame, two symmetrical
Frame, which covers, is equipped with clump weight；
The side side that centre frame is in contact with rack is equipped with along the straight of the linear movement part moving direction arrangement
Line guideway；
The straight-line displacement driving mechanism includes: servo motor, square bearing block, ball-screw and spring, wherein servo
Motor is mounted on the rack, and drives ball screw turns by shaft coupling, the feed screw nut on ball-screw is fixed with centre frame
Connection, square bearing block are mounted on the rack, by internal bearing that ball-screw is axially fixed；
The frame upper end is equipped with the connecting hole that connect with upper spring seat, on the bottom of the centre frame lid and clump weight
It is equipped with the connecting hole for lower spring cup connection, the spring is connected between upper spring seat and lower spring cup；
Lead screw rear support is mounted on bottom of the frame, the support with the axis co-axial of ball-screw is equipped in lead screw rear support
Hole, the bottom end of the ball-screw are fitted into the supported hole；
First displacement detecting sensor, for monitoring the upper and lower limit position of line slideway auxiliary top shoe, and will test
One displacement signal is sent to slave computer；
Second displacement detection sensor, for detecting the amplitude of blade, and the second displacement signal that will test is sent to down
Position machine；
Lead screw overrun alarm is connect with the slave computer signal；
Servo motor fault alarm is connect with the slave computer signal；
Screw rod lubrication mechanism, including oil pump, oil liquid reversal valve and fuel reserve tank, wherein oil pump from fuel reserve tank for taking out
Lubricating oil is taken, slave computer activates oil liquid reversal valve whether fuel-displaced according to the lubrication time interval of setting；
The slave computer realizes data communication by data line and host computer.
The upper buffering rubber of the side's of preventing bearing block Yu centre frame rigid collision is installed between the centre frame and square bearing block
Rubber mat；The frame lower is equipped with the lower buffer rubber gasket of anti-centre frame and rigidity of frame collision.
First displacement detecting sensor is optical displacement sensor, including two, two photo-electric displacement sensings
Device is separately mounted to the upper/lower terminal of the line slideway auxiliary；
The second displacement detection sensor is laser type displacement sensor, is installed on immediately below blade, passes through laser light
Thus beam vertical irradiation detects the amplitude of blade in blade bottom surface.
The centre frame, which is covered, to be connect by working plate with clump weight, and the clump weight is by small clump weight, middle clump weight, big
Counter weight group is at the working plate is equipped with the clump weight mounting groove for installing clump weight of different sizes.
The frame is made of H profile steel, and the side of the H profile steel is fixedly connected with cramping body, and the other side is equipped on described
Mounting surface and lower mounting surface；The both ends of H profile steel are respectively equipped with the left side mounting surface and right side mounting surface.
The line slideway auxiliary includes linear guide, sliding block and sliding block mounting plate, wherein the linear guide is mounted on
The side adjacent with centre frame in rack, sliding block are mounted on sliding block mounting plate, and sliding block mounting plate is mounted on centre frame.
The present invention further discloses a kind of wind electricity blade fatigue test exciting dress based on servo motor driving
The test method set, comprising the following steps:
The rack of device is mounted on wind electricity blade fixture by the first step, and wind electricity blade fixture is fixed on blade, thus
The orderly installation of realization device and blade, pedestal；
Second step installs activation system, and Serve Motor Control centre frame does the simple harmonic oscillation of sinusoidal rule, in blade
It is upper to generate the exciting force for driving its vibration sinusoidally changed, make linear reciprocation fortune using servo motor driving mass block
It is dynamic and generate reaction force, enable blade along towards or tangential vibrations；
At the same time, the first displacement detecting sensor, for monitoring the upper and lower limit position of line slideway auxiliary top shoe, and
The first displacement signal that will test is sent to slave computer；The amplitude of second displacement detection sensor examinations blade, and will inspection
The second displacement signal of survey is sent to slave computer；
Lead screw overrun alarm is connect with the slave computer signal；
Servo motor fault alarm is connect with the slave computer signal；
Slave computer activates oil liquid commutation valve timing fuel-displaced according to the lubrication time interval of setting, and oil pump is extracted from fuel reserve tank
Lubricating oil is to the ball screw assembly, timed lubrication；
The slave computer realizes data communication by data line and host computer.
The excited frequency of the servo motor can change at any time, and guarantee system is in resonance state always.
The utility model has the advantages that
The present invention drives center bearing bracket to make straight reciprocating motion and generate and be used to blade by the positive and negative rotation of servo motor
Property power (or being considered mass block to the reaction force of blade holder), enable blade along towards or rotation direction vibration.Servo electricity
Machine control mass block does the simple harmonic oscillation of sinusoidal rule, generates on blade and drives sinusoidally changing for its vibration sharp
Vibration power.Its excited frequency can change at any time, and guarantee system is in resonance state always.
Compared with old-fashioned pendulum resonance fatigue experimental test equipment, the invention has the following advantages that
The first, the wind electricity blade fatigue test exciting device of the servo motor driving of the invention used, due to servo motor
Accuracy and programmability, can simplify mechanical structure, reduce equipment cost；The present invention can make system be constantly in resonance
State improves test efficiency to reduce the blade fatigue test period.
The second, the present invention is equipped with using ball-screw and on the side side that centre frame is in contact with rack along institute
State the line slideway auxiliary of linear movement part moving direction arrangement；Ball-screw and structure stress are main to prop up mainly on guide rail
Support force is provided by guide rail and sliding block, and ball-screw does not stress completely, therefore ball-screw will not generate bending deformation or destruction；
In addition, frame of the present invention is made of H profile steel, rigidity is high, and straightness is good, the straightness after guide rail installation is effectively guaranteed.
Timed lubrication screw devices are increased in third, the present invention, prevent lead screw long-time high speed rotation from not lubricating and embracing
Extremely.
4th, the present invention increases revolving support in the bottom of ball-screw, and cabinet is avoided to stop transporting in lead screw bottom stress
It is dynamic.
5th, the present invention will be changed to be pressurized with the force way of spring from tension, substantially prolong the service life of spring.
Detailed description of the invention
Fig. 1 is the main view of exciting unit of the present invention；
Wherein, 1 is servo motor；2 be shaft coupling；3 be oil pump；4 be square bearing block；5 be upper buffer rubber gasket；6 be rolling
Ballscrew；7 be feed screw nut；8 be upper spring support plate；9 be spring；10 be line slideway auxiliary；11 be clump weight；12 are
Heart frame；13 be lead screw rear support；14 be spring shaft；15 be lower buffer rubber gasket；16 be limit switch；17 be lower spring supporting
Plate；18 be rack；
Fig. 2 is the top view of Fig. 1；
Wherein, 19 be working plate；Frame lid centered on 20；21 be sliding block；22 be linear guide；23 be sliding block mounting plate；
Fig. 3 is the perspective view of exciting unit of the present invention；
Fig. 4 is mounting structure schematic diagram of the apparatus of the present invention when carrying out fatigue test；
Fig. 5 is blade of the present invention along towards device installation site figure when vibrating；
Fig. 6 is device installation site figure when blade of the present invention tangentially vibrates.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, with reference to the accompanying drawing 1 and embodiment pair
The present invention is described in further detail.
In embodiment, for ease of description, the description of each component relative positional relationship is the cloth according to Figure of description 1
Figure mode is described, such as: the positional relationship of up, down, left, right, before and after is the Butut side according to Figure of description 1
Always it determines.
A kind of wind electricity blade fatigue test exciting device of present invention servo motor driving, including support system and be mounted on
Power drive system, detecting and controlling system and safe-guard system in support system；
As shown in FIG. 1 to 3, the support system include rack 18, centre frame 12, centre frame lid 20, working plate 19,
Lead screw rear support 13, line slideway auxiliary 10.
Clump weight 11 is mounted on working plate 19, and clump weight 11 divides for large, medium and small three kinds of different sizes, as needed, choosing
Different combining forms is selected, different weight mass is constituted, meets requirement；
Working plate 19 is mounted on centre frame lid 20, and main purpose is and to have assisted counterweight for installing clump weight 10
Effect；
Centre frame lid 20 is mounted on centre frame 12, has sufficiently large area and weight, so as to installment work plate 16, and
Auxiliary plays counterweight；
Sliding block 21 in line slideway auxiliary 10 is mounted on sliding block mounting plate 23, and sliding block mounting plate 23 is mounted on centre frame 12
On.
Linear guide 22 in line slideway auxiliary 10 is mounted in rack 18.
Centre frame 12, centre frame lid, working plate, clump weight composition mechanism movable part, rack is fixed part.Work as cunning
When block and guide rail relative motion, the frictional force of movable part and fixed part is force of rolling friction, to reduce drag losses；
Centre frame lid, working plate, clump weight configure two groups, the two sides of frame central are arranged symmetrically in, to increase moving portion
The weight divided；
Lower buffer rubber gasket 15 is mounted on frame lower, collides to prevent centre frame and rigidity of frame.
The power drive system includes servo motor 1, shaft coupling 2, square bearing block 4, upper buffer rubber gasket 5, ball
Lead screw 7, spring 9 and upper spring support plate 8, lower spring-support plate 17.Servo motor 1 is mounted on the rack, and passes through shaft coupling band
Servo motor rotary motion, is changed into the movement of feed screw nut by dynamic ball screw turns；
Feed screw nut 7 links together with centre frame, and moves under the drive of ball-screw 6 together；
Square bearing block 4 is mounted on the rack, will not be with ball wire by internal bearing by 6 axial restraint of ball-screw
The rotation of thick stick 6 and generate axial movement；
On upper 5 side's of being mounted on bearing block 4 of buffer rubber gasket, to prevent square shaft to hold seat 4 and centre frame rigid collision；
Upper spring support plate 8 passes through rack, and lower spring-support plate 17 passes through centre frame lid 20, working plate 19, clump weight 11；
Spring 9 is hung on upper spring support plate 8 and lower spring-support plate 17, and is symmetrically installed two groups, so that stress is flat
Weighing apparatus, and reduce influence of the gravity to system.
Lead screw rear support 13 is mounted on frame lower, and the bottom end of ball-screw 6 is fitted into the hole of lead screw rear support 13, keeps
6 bottom end of ball-screw does not generate swing, to improve the kinematic accuracy of system；
Detecting and controlling system includes the first displacement detecting sensor, for monitoring the upper and lower of ball-screw upper leading screw nut
Extreme position, and the first displacement signal that will test is sent to slave computer；
Second displacement detection sensor, for detecting the amplitude of blade, and the second displacement signal that will test is sent to down
Position machine；
Lead screw overrun alarm is connect with the slave computer signal；
Servo motor fault alarm is connect with the slave computer signal；
Screw rod lubrication mechanism, including oil pump, oil liquid reversal valve and fuel reserve tank, wherein oil pump from fuel reserve tank for taking out
Lubricating oil is taken, slave computer activates oil liquid reversal valve whether fuel-displaced according to the lubrication time interval of setting；
In the present invention, slave computer is 51 single-chip microcontrollers, and 51 single-chip microcontroller mainly includes with 64KB addressing space, 4KB journey
Sequence storage unit, RAM (256 bytes)；2 timers, 2 middle fractures, 1 UARST serial ports, external crystal-controlled oscillation 12M, machine week
Phase 1M, the program instruction period 1 more than the machine cycle that is, the debugging of 1S internal program instruction execution is less than 1M, 5V power supply, and I/O port removes
P0 is needed outside outer connecting resistance, other all to directly drive level output.
The maximum stream flow of grease pump is 6L/ hours, and flow is adjustable, lubrication pressure 0.1bar, is suitble to oil viscosity 20-
150cST., the horizontal installation dimension in two holes are 100 millimeters.
The slave computer realizes data communication by data line and host computer.
Line slideway auxiliary is mounted on the intermediate symmetry line of rack or is mounted on the side of rack.
As shown in figure 4, device need to be mounted on blade when carrying out fatigue test, when installation, the rack of device is installed
In blade holder, blade holder is fixed on blade, thus the orderly installation of realization device and blade, pedestal, such as Fig. 4.
A kind of test method of the wind electricity blade fatigue test exciting device based on servo motor driving of the present invention, packet
Include following steps:
The rack of device is mounted on wind electricity blade fixture by the first step, and wind electricity blade fixture is fixed on blade, thus
The orderly installation of realization device and blade, pedestal；
Second step installs activation system, and Serve Motor Control centre frame does the simple harmonic oscillation of sinusoidal rule, in blade
It is upper to generate the exciting force for driving its vibration sinusoidally changed, make linear reciprocation fortune using servo motor driving mass block
It is dynamic and generate reaction force, enable blade along towards or tangential vibrations；
At the same time, the first displacement detecting sensor, for monitoring the upper and lower limit position of line slideway auxiliary top shoe, and
The first displacement signal that will test is sent to slave computer；The amplitude of second displacement detection sensor examinations blade, and will inspection
The second displacement signal of survey is sent to slave computer；
Lead screw overrun alarm is connect with the slave computer signal；
Servo motor fault alarm is connect with the slave computer signal；
Slave computer activates oil liquid commutation valve timing fuel-displaced according to the lubrication time interval of setting, and oil pump is extracted from fuel reserve tank
Lubricating oil is to the ball screw assembly, timed lubrication；
The slave computer realizes data communication by data line and host computer.
The excited frequency of the servo motor can change at any time, and guarantee system is in resonance state always.
So as to complete the fatigue test for wind electricity blade in a short time, improves efficiency, reduce cost.
Blade along towards or device installation site when tangential vibrations it is also different, when blade is along towards vibration, the dress
The installation site set such as Fig. 5；
When blade tangentially vibrates, the installation site of the device such as Fig. 6.
Claims (8)
1. a kind of wind electricity blade fatigue test exciting device of servo motor driving, for wind electricity blade wave direction and
The composite fatigue load test of edgewise direction characterized by comprising
Wind electricity blade fixture is sleeved on the wind electricity blade section section, cramping body and suit including offering profiling hole
Frame outside the cramping body, the cramping body have structure symmetrical above and below, and the frame includes:
The upper mounting surface and lower mounting surface extended along the x axis, is respectively equipped on the upper mounting surface and lower mounting surface and exciting
The mounting hole that unit is connected and fixed when experiment, is symmetrically installed a set of exciting unit on upper mounting surface and lower mounting surface, to band
Dynamic wind electricity blade realizes blade tangential vibrations；
The left side mounting surface and right side mounting surface extended along the y axis is set respectively on the left side mounting surface and right side mounting surface
There is a mounting hole being connected and fixed with exciting unit, when experiment, is symmetrically installed and a set of swashs on left side mounting surface and right side mounting surface
Shake unit, to drive wind electricity blade to realize blade towards vibration；
The exciting unit includes:
Rack is enclosed by four rod pieces and is had rectangular enclosure, and the upper end of rack is provided with straight-line displacement driving mechanism, institute
The driving end for stating straight-line displacement driving mechanism and the linear movement part being arranged in rectangular enclosure are sequentially connected, and the straight line moves
Dynamic part includes centre frame, is symmetrically arranged with two centre frame lids on separate rack two sides on centre frame, two symmetrical framves cover
Clump weight is installed；
The side side that centre frame is in contact with rack is equipped with leads along the straight line that the linear movement part moving direction is arranged
Rail pair；
The straight-line displacement driving mechanism includes: servo motor, square bearing block, ball-screw and spring, wherein servo motor
It being mounted on the rack, ball screw turns is driven by shaft coupling, the feed screw nut on ball-screw is fixedly connected with centre frame,
Square bearing block is mounted on the rack, by internal bearing that ball-screw is axially fixed；
The frame upper end is equipped with the connecting hole connecting with upper spring seat, is all provided on the bottom of the centre frame lid and clump weight
There is the connecting hole for lower spring cup connection, the spring is connected between upper spring seat and lower spring cup；
Lead screw rear support is mounted on bottom of the frame, the supported hole with the axis co-axial of ball-screw, institute is equipped in lead screw rear support
The bottom end for stating ball-screw is fitted into the supported hole；
First displacement detecting sensor, for monitoring the upper and lower limit position of line slideway auxiliary top shoe, and first for will test
Shifting signal is sent to slave computer；
Second displacement detection sensor, for detecting the amplitude of blade, and the second displacement signal that will test is sent to slave computer；
Lead screw overrun alarm is connect with the slave computer signal；
Servo motor fault alarm is connect with the slave computer signal；
Screw rod lubrication mechanism, including oil pump, oil liquid reversal valve and fuel reserve tank, wherein oil pump is used to extract profit from fuel reserve tank
Whether lubricating oil, slave computer activate oil liquid reversal valve fuel-displaced according to the lubrication time interval of setting；
The slave computer realizes data communication by data line and host computer.
2. the wind electricity blade fatigue test exciting device of servo motor driving according to claim 1, which is characterized in that institute
State the upper buffer rubber gasket that the side's of preventing bearing block Yu centre frame rigid collision are equipped between centre frame and square bearing block；The machine
Frame lower part is equipped with the lower buffer rubber gasket of anti-centre frame and rigidity of frame collision.
3. the wind electricity blade fatigue test exciting device of servo motor driving according to claim 1, which is characterized in that institute
The first displacement detecting sensor is stated as optical displacement sensor, including two, two optical displacement sensors are installed respectively
In the upper/lower terminal of the line slideway auxiliary；
The second displacement detection sensor is laser type displacement sensor, is installed on immediately below blade, is hung down by laser beam
It directly is irradiated in blade bottom surface, thus detects the amplitude of blade.
4. the wind electricity blade fatigue test exciting device of servo motor driving according to claim 1, which is characterized in that institute
It states centre frame and covers and connect by working plate with clump weight, the clump weight is by small clump weight, middle clump weight, big counter weight group
At the working plate is equipped with the clump weight mounting groove for installing clump weight of different sizes.
5. the wind electricity blade fatigue test exciting device of servo motor driving according to claim 1, which is characterized in that institute
It states frame to be made of H profile steel, the side of the H profile steel is fixedly connected with cramping body, and the other side is equipped with the upper mounting surface under
Mounting surface；The both ends of H profile steel are respectively equipped with the left side mounting surface and right side mounting surface.
6. the wind electricity blade fatigue test exciting device of servo motor driving according to claim 1, which is characterized in that institute
Stating line slideway auxiliary includes linear guide, sliding block and sliding block mounting plate, wherein the linear guide is mounted on the rack in
The adjacent side of heart frame, sliding block are mounted on sliding block mounting plate, and sliding block mounting plate is mounted on centre frame.
7. a kind of test method of the wind electricity blade fatigue test exciting device based on the driving of servo motor described in claim 1,
Characterized by comprising the following steps:
The rack of device is mounted on wind electricity blade fixture by the first step, and wind electricity blade fixture is fixed on blade, to realize
The orderly installation of device and blade, pedestal；
Second step installs activation system, and Serve Motor Control centre frame does the simple harmonic oscillation of sinusoidal rule, produces on blade
The exciting force of raw driving its vibration sinusoidally changed, make straight reciprocating motion using servo motor driving mass block and
Generate reaction force, enable blade along towards or tangential vibrations；
At the same time, the first displacement detecting sensor, for monitoring the upper and lower limit position of line slideway auxiliary top shoe, and will inspection
The first displacement signal surveyed is sent to slave computer；The amplitude of second displacement detection sensor examinations blade, and will test
Second displacement signal is sent to slave computer；
Lead screw overrun alarm is connect with the slave computer signal；
Servo motor fault alarm is connect with the slave computer signal；
Slave computer activates oil liquid commutation valve timing fuel-displaced according to the lubrication time interval of setting, and oil pump extracts lubrication from fuel reserve tank
Oil is to the ball screw assembly, timed lubrication；
The slave computer realizes data communication by data line and host computer.
8. the wind electricity blade fatigue test exciting according to claim 7 based on the driving of servo motor described in claim 1
The test method of device, which is characterized in that the excited frequency of the servo motor can change at any time, and guarantee system is in always
Resonance state.
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| CN201811317121.3A CN109283075A (en) | 2018-11-07 | 2018-11-07 | The wind electricity blade fatigue test exciting device and test method of servo motor driving |
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| CN201811317121.3A CN109283075A (en) | 2018-11-07 | 2018-11-07 | The wind electricity blade fatigue test exciting device and test method of servo motor driving |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110296729A (en) * | 2019-07-01 | 2019-10-01 | 哈尔滨理工大学 | A kind of dynamic reliability detection device of trough type photoelectric sensor |
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| CN110567695A (en) * | 2019-09-02 | 2019-12-13 | 洛阳双瑞风电叶片有限公司 | Auxiliary device for reducing wind power blade waving direction fatigue test air resistance |
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