CN111390632A - Feedback regulation flutter suppression device based on giant magnetostrictive material - Google Patents
Feedback regulation flutter suppression device based on giant magnetostrictive material Download PDFInfo
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- CN111390632A CN111390632A CN202010257261.7A CN202010257261A CN111390632A CN 111390632 A CN111390632 A CN 111390632A CN 202010257261 A CN202010257261 A CN 202010257261A CN 111390632 A CN111390632 A CN 111390632A
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- China
- Prior art keywords
- giant magnetostrictive
- dsp microprocessor
- rod
- magnetostrictive rod
- flutter
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- 239000000463 material Substances 0.000 title claims abstract description 28
- 230000001629 suppression Effects 0.000 title claims abstract description 25
- 230000009123 feedback regulation Effects 0.000 title claims abstract description 21
- 239000012782 phase change material Substances 0.000 claims abstract description 15
- 238000006073 displacement reaction Methods 0.000 claims description 18
- 230000005284 excitation Effects 0.000 claims description 8
- 239000010408 film Substances 0.000 claims description 6
- RSIJVJUOQBWMIM-UHFFFAOYSA-L sodium sulfate decahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[O-]S([O-])(=O)=O RSIJVJUOQBWMIM-UHFFFAOYSA-L 0.000 claims description 6
- 239000010409 thin film Substances 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 2
- 230000003750 conditioning effect Effects 0.000 claims 1
- 230000002441 reversible effect Effects 0.000 abstract description 6
- 230000008859 change Effects 0.000 abstract description 2
- 238000005520 cutting process Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000002401 inhibitory effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000008204 material by function Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000009125 negative feedback regulation Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/0032—Arrangements for preventing or isolating vibrations in parts of the machine
- B23Q11/0039—Arrangements for preventing or isolating vibrations in parts of the machine by changing the natural frequency of the system or by continuously changing the frequency of the force which causes the vibration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
- H02N2/06—Drive circuits; Control arrangements or methods
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention provides a feedback regulation flutter suppression device based on a giant magnetostrictive material, which comprises: the phase change material phase change device comprises a DSP microprocessor, a giant magnetostrictive rod and a Hall sensor, wherein the giant magnetostrictive rod is arranged in an inner sleeve, the inner sleeve is embedded in an outer sleeve, and the phase change material is arranged in a space formed by the outer wall of the inner sleeve and the inner wall of the outer sleeve; the upper end of the giant magnetostrictive rod is in contact connection with one end of the upper permanent magnet, the lower end of the giant magnetostrictive rod is in contact connection with one end of the lower permanent magnet, and the other end of the upper permanent magnet props against the cutter through the front end of the output rod; the exciting coil is wound on the outer wall of the outer sleeve, and the Hall sensor is arranged in the inner sleeve and used for detecting the magnetic field intensity formed by the exciting coil; the DSP microprocessor is used for controlling the exciting coil to reversely output a flutter signal according to the magnetic field intensity, so that the giant magnetostrictive rod can inhibit the vibration of the cutter. Therefore, the strength of the reverse flutter signal can be adjusted in a closed loop feedback mode, and effective suppression of tool flutter is achieved.
Description
Technical Field
The invention relates to the technical field of electrical control, in particular to a feedback regulation flutter suppression device based on a giant magnetostrictive material.
Background
With the development of new functional material technology, various functional materials are applied to the field of mechanical vibration.
The traditional damper device for inhibiting the cutting machining vibration mostly adopts piezoelectric ceramics, and the damper device made of the traditional materials generally has the defects of long response time, complex structure, low output power, low precision and the like, so that a plurality of working functions of the damper device are influenced to a certain extent. The existing vibration suppression device developed based on the giant magnetostrictive material is poor in elimination effect, complex in structure and free of a feedback regulation control system, an upper computer connected with the device cannot recognize whether flutter is effectively suppressed, the roughness of a workpiece can be measured only by manual observation, and the device is low in safety and low in efficiency.
Disclosure of Invention
In view of the defects in the prior art, the invention aims to provide a feedback regulation flutter suppression device based on a giant magnetostrictive material.
The invention provides a feedback regulation flutter suppression device based on a giant magnetostrictive material, which comprises: the sensor comprises a DSP (Digital Signal Processing) microprocessor, a giant magnetostrictive rod, an exciting coil, an inner sleeve, an outer sleeve, a phase-change material and a Hall sensor, wherein the giant magnetostrictive rod is arranged in the inner sleeve, the inner sleeve is embedded in the outer sleeve, and the phase-change material is arranged in a space formed by the outer wall of the inner sleeve and the inner wall of the outer sleeve; the upper end of the giant magnetostrictive rod is in contact connection with one end of the upper permanent magnet, the lower end of the giant magnetostrictive rod is in contact connection with one end of the lower permanent magnet, and the other end of the upper permanent magnet abuts against the cutter through the front end of the output rod; the excitation coil is wound on the outer wall of the outer sleeve and is electrically connected with the DSP microprocessor; the Hall sensor is arranged in the inner sleeve and used for detecting the magnetic field intensity formed by the exciting coil and feeding the magnetic field intensity back to the DSP microprocessor; the DSP microprocessor is used for controlling the exciting coil to reversely output a flutter signal according to the magnetic field intensity, so that the ultra-magnetostrictive rod can inhibit the vibration of the cutter.
Optionally, the system further comprises an upper computer in communication connection with the DSP microprocessor, and the DSP microprocessor feeds back vibration suppression conditions to the tool to the upper computer; and the upper computer sends a corresponding control instruction to the DSP microprocessor according to the vibration suppression condition.
Optionally, the method further comprises: the thin film pressure sensor is positioned below the giant magnetostrictive rod; the film pressure sensor is connected with the lower permanent magnet and used for detecting the stress borne by the giant magnetostrictive rod and feeding back the stress borne by the giant magnetostrictive rod to the DSP microprocessor, so that the DSP microprocessor adjusts the magnetic field intensity formed by the exciting coil according to the stress.
Optionally, the method further comprises: the gasket is arranged on the upper end face of the outer sleeve; the displacement sensor is arranged between the gasket and the output rod and used for detecting the displacement of the giant magnetostrictive rod and feeding the displacement back to the DSP microprocessor, so that the DSP microprocessor can adjust the magnetic field intensity formed by the exciting coil according to the displacement.
Optionally, the phase change material is sodium sulfate decahydrate.
Optionally, the method further comprises: the disc spring is sleeved on the output rod, the lower end face of the upper end cover is fixedly connected with the upper end face of the lower shell through threads, the linear bearing is fixedly connected with the upper end face of the upper end cover through threads, the lower shell surrounds the outer sleeve, and the upper shell surrounds the output rod and the upper end cover; the upper shell and the lower shell are fixedly connected through matched threads.
Compared with the prior art, the invention has the following beneficial effects:
according to the feedback regulation and inhibition flutter device based on the giant magnetostrictive material, the DSP microprocessor controls the reverse flutter signal output by the excitation coil on the periphery of the giant magnetostrictive rod according to the magnetic field intensity fed back by the sensor, so that the strength of the reverse flutter signal can be adjusted in a closed loop feedback mode, and the effective inhibition of tool flutter is realized. The whole process does not need manual intervention, and the control precision is high.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic control flow diagram of the feedback regulation for suppressing flutter based on giant magnetostrictive material provided by the present invention;
FIG. 2 is a schematic cross-sectional structural diagram of a feedback regulation flutter suppression device based on a giant magnetostrictive material provided by the invention;
fig. 3 is a schematic structural diagram of the feedback regulation flutter suppression device based on the giant magnetostrictive material provided by the invention.
In the figure:
1-cutting tool
2-Upper casing
3-output rod
4-shim
5-outer sleeve
6-phase change material
7-exciting coil
8-inner sleeve
9-giant magnetostrictive rod
10-film pressure sensor
11-lower permanent magnet
12-lower end cap
13-screw
14-Hall sensor
15-lower casing
16-upper permanent magnet
17-displacement sensor
18-disc spring
19-Upper end cap
20-linear bearing
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
FIG. 1 is a schematic control flow diagram of the feedback regulation for suppressing flutter based on giant magnetostrictive material provided by the present invention;
fig. 2 is a schematic cross-sectional structural diagram of a feedback regulation flutter suppression device based on a giant magnetostrictive material provided by the invention. Referring to fig. 1 and 2, the present invention utilizes a DSP microprocessor-based control program to perform error compensation according to flutter displacement feedback information, adjust the magnetic field strength generated by the excitation coil 7, extend or shorten the super magnetostrictive rod 9, change the reverse flutter signal displacement value output from the cutter 1, and detect the cutter flutter displacement, the strength of the magnetic field, and the pressure of the super magnetostrictive rod during cutting through the displacement sensor 17, the hall sensor 14, and the film sensor 10. The sensor feeds back information to the DSP microprocessor through the conversion circuit to be compared with a given value, and calculates an output compensation value through a DSP microprocessor program, so that the purpose of reciprocating cycle comparison is achieved, and a closed-loop control loop is realized. The invention also utilizes a judgment program in the DSP microprocessor to judge whether the chatter vibration is successfully inhibited and feed information back to the upper computer, and an instruction for inhibiting the chatter vibration failure is fed back to the upper computer, the upper computer outputs an instruction for cutting and machining interruption to the DSP microprocessor according to the instruction, and a closed-loop control system based on the microprocessor finishes the operation. If the flutter suppression is successful, the upper computer outputs a cutting instruction to continue machining, and a second closed-loop control loop is formed.
Fig. 3 is a schematic structural diagram of the feedback regulation flutter suppression device based on the giant magnetostrictive material provided by the invention. Referring to fig. 2 and 3, the giant magnetostrictive material-based feedback regulation flutter suppression device in the present invention may include a tool 1, an upper housing 2, an output rod 3, a spacer 4, an outer sleeve 5, a phase change material 6, an excitation coil 7, an inner sleeve 8, a giant magnetostrictive rod 9, a thin film sensor 10, a lower permanent magnet 11, a lower end cover 12, a screw 13, a hall sensor 14, a lower housing 15, an upper permanent magnet 16, a displacement sensor 17, a disc spring 18, an upper end cover 19, and a linear bearing 20.
Illustratively, the invention adopts a giant magnetostrictive rod material with the diameter of 6mm and the length of 100mm, and the excitation coil 7, the Hall inductor 14 and the outer sleeve 5 are arranged outside the giant magnetostrictive rod material, and the length of the excitation coil is greater than that of the giant magnetostrictive rod 9, so as to ensure that the magnetic field of the giant magnetostrictive rod 9 is uniform and stable. And the external part of the giant magnetostrictive rod 9 is the sodium sulfate decahydrate phase-change material 6. The excitation coil 7 and the hall sensor 14 are in a completely isolated dry environment. The super magnetostrictive rod 9 is in contact with a thin film pressure sensor 10, and the thin film pressure sensor 10 is in contact with a lower permanent magnet 11. The other end of the upper permanent magnet 16 is in contact with the output rod 3. All the components are arranged in the upper shell 2 and the lower shell 15, the upper permanent magnet 16 and the lower permanent magnet 11 are arranged at the upper end and the lower end of the giant magnetostrictive rod 9, and the inner sleeve 8 and the outer sleeve 5 are arranged at the outer side. Wherein, a heat insulation layer of sodium sulfate decahydrate phase change material 6 is arranged between the inner sleeve 8 and the outer sleeve 5. The disc spring 18 is arranged on the output rod 3, the pre-pressure of the giant magnetostrictive rod 9 is adjusted through the linear bearing 20, and the magnitude of the pre-pressure is detected through the film pressure sensor 10. The cutter 1 is arranged in the upper shell 2, and the bottom of the cutter 1 is connected with an output rod 3. The upper shell 2 is connected with the lower shell 15, the upper end cover 19 is connected with the linear bearing 20, and the upper end cover 19 is connected with the lower shell 15 through threads.
The invention mainly detects vibration displacement signals through a control system with feedback regulation and feeds back the vibration displacement signals to a DSP microprocessor, the DSP microprocessor controls an exciting coil to reversely output a flutter signal to a cutter connected with the front end of the device to achieve the effect of inhibiting vibration, and the DSP microprocessor judges whether the program judges the inhibition success or not and feeds back information to an upper computer. Because the vibration is generated quickly, the damage is large, the amplitude is small but the frequency is high in the actual cutting process, and meanwhile, the flutter suppression effect also needs to be detected. There is therefore a need for a fast two-loop real-time feedback control loop to handle cutting chatter.
In the embodiment, the upper computer is connected with the DSP microprocessor, so that the compensation value can be calculated by a better and faster running program to control the exciting coil to output a reverse vibration signal to the cutter, and the reverse vibration signal is fed back to an effect instruction for inhibiting flutter of the upper computer, the flutter inhibiting effect is detected, the quality of a workpiece does not need to be manually detected, and the process of manually detecting the quality of the workpiece is reduced.
In this embodiment, displacement sensor through the installation, the film pressure sensor of giant magnetostriction stick lower extreme, the internal hall sensor of inner skleeve structure can be with the displacement volume, the pressure that detect giant magnetostriction stick to and three kinds of different information of magnetic induction intensity. And feeding the three kinds of information back to the DSP processor to realize negative feedback regulation function.
In the embodiment, the phase-change material is sodium sulfate decahydrate, and the phase-change material ensures that the temperature of the giant magnetostrictive rod material is unchanged by absorbing or radiating heat in the phase-change process, so that the material performance of the giant magnetostrictive rod is improved. This embodiment is through adopting the temperature of sodium sulfate decahydrate phase change material control giant magnetostriction stick to optimize the inner structure of device, reduced the manufacturing degree of difficulty and cost, make the device miniaturized, on the lathe of the installation of being convenient for of lightweight.
In the embodiment, the giant magnetostrictive rod is connected with the upper permanent magnet and the lower permanent magnet, so that a bias magnetic field is formed by using the permanent magnets without adopting a bias coil, the material performance of the giant magnetostrictive rod is improved, the internal structure of the device is optimized, and the space utilization rate is improved.
In this embodiment, the linear bearing and the upper end cap are connected by threads to form a pre-pressure mechanism with the disc spring, so that the pre-pressure of the giant magnetostrictive rod can be adjusted.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (6)
1. A feedback regulation flutter suppression device based on a giant magnetostrictive material is characterized by comprising: the device comprises a DSP microprocessor, a giant magnetostrictive rod, an exciting coil, an inner sleeve, an outer sleeve, a phase-change material and a Hall sensor, wherein the giant magnetostrictive rod is arranged in the inner sleeve, the inner sleeve is embedded in the outer sleeve, and the phase-change material is arranged in a space formed by the outer wall of the inner sleeve and the inner wall of the outer sleeve; the upper end of the giant magnetostrictive rod is in contact connection with one end of the upper permanent magnet, the lower end of the giant magnetostrictive rod is in contact connection with one end of the lower permanent magnet, and the other end of the upper permanent magnet abuts against the cutter through the front end of the output rod; the excitation coil is wound on the outer wall of the outer sleeve and is electrically connected with the DSP microprocessor; the Hall sensor is arranged in the inner sleeve and used for detecting the magnetic field intensity formed by the exciting coil and feeding the magnetic field intensity back to the DSP microprocessor; the DSP microprocessor is used for controlling the exciting coil to reversely output a flutter signal according to the magnetic field intensity, so that the ultra-magnetostrictive rod can inhibit the vibration of the cutter.
2. The giant magnetostrictive material-based feedback regulation flutter suppression device according to claim 1, further comprising an upper computer in communication connection with the DSP microprocessor, wherein the DSP microprocessor feeds back a vibration suppression situation for a cutter to the upper computer; and the upper computer sends a corresponding control instruction to the DSP microprocessor according to the vibration suppression condition.
3. The giant magnetostrictive material-based feedback regulation flutter suppression device according to claim 1, further comprising: the thin film pressure sensor is positioned below the giant magnetostrictive rod; the film pressure sensor is connected with the lower permanent magnet and used for detecting the stress borne by the giant magnetostrictive rod and feeding back the stress borne by the giant magnetostrictive rod to the DSP microprocessor, so that the DSP microprocessor adjusts the magnetic field intensity formed by the exciting coil according to the stress.
4. The giant magnetostrictive material-based feedback regulation flutter suppression device according to claim 1, further comprising: the gasket is arranged on the upper end face of the outer sleeve; the displacement sensor is arranged between the gasket and the output rod and used for detecting the displacement of the giant magnetostrictive rod and feeding the displacement back to the DSP microprocessor, so that the DSP microprocessor can adjust the magnetic field intensity formed by the exciting coil according to the displacement.
5. The giant magnetostrictive material-based feedback regulation flutter suppression device according to any one of claims 1-5, wherein the phase change material is sodium sulfate decahydrate.
6. The giant magnetostrictive material-based feedback conditioning flutter suppression device according to any one of claims 1-5, further comprising: the disc spring is sleeved on the output rod, the lower end face of the upper end cover is fixedly connected with the upper end face of the lower shell through threads, the linear bearing is fixedly connected with the upper end face of the upper end cover through threads, the lower shell surrounds the outer sleeve, and the upper shell surrounds the output rod and the upper end cover; the upper shell and the lower shell are fixedly connected through matched threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010257261.7A CN111390632A (en) | 2020-04-02 | 2020-04-02 | Feedback regulation flutter suppression device based on giant magnetostrictive material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010257261.7A CN111390632A (en) | 2020-04-02 | 2020-04-02 | Feedback regulation flutter suppression device based on giant magnetostrictive material |
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| Publication Number | Publication Date |
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| CN111390632A true CN111390632A (en) | 2020-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010257261.7A Pending CN111390632A (en) | 2020-04-02 | 2020-04-02 | Feedback regulation flutter suppression device based on giant magnetostrictive material |
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| Country | Link |
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| CN (1) | CN111390632A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4837516A (en) * | 1987-07-27 | 1989-06-06 | Kabushiki Kaisha Toshiba | Tuning device for nuclear magnetic resonance imaging apparatus and nuclear magnetic resonance imaging apparatus including the tuning device |
| CN1564452A (en) * | 2004-03-19 | 2005-01-12 | 浙江大学 | Phase change temp controlling super magneto strictive extension microshifting actuator |
| JP2007294535A (en) * | 2006-04-21 | 2007-11-08 | Tdk Corp | Magnetostrictive element |
| CN101337330A (en) * | 2008-08-01 | 2009-01-07 | 东南大学 | Compensation process capable of increasing machine precision of numerical-controlled lathe and magnetic striction compensation mechanism |
| CN104601038A (en) * | 2015-01-15 | 2015-05-06 | 上海应用技术学院 | Precise magnetostrictive actuator |
-
2020
- 2020-04-02 CN CN202010257261.7A patent/CN111390632A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4837516A (en) * | 1987-07-27 | 1989-06-06 | Kabushiki Kaisha Toshiba | Tuning device for nuclear magnetic resonance imaging apparatus and nuclear magnetic resonance imaging apparatus including the tuning device |
| CN1564452A (en) * | 2004-03-19 | 2005-01-12 | 浙江大学 | Phase change temp controlling super magneto strictive extension microshifting actuator |
| JP2007294535A (en) * | 2006-04-21 | 2007-11-08 | Tdk Corp | Magnetostrictive element |
| CN101337330A (en) * | 2008-08-01 | 2009-01-07 | 东南大学 | Compensation process capable of increasing machine precision of numerical-controlled lathe and magnetic striction compensation mechanism |
| CN104601038A (en) * | 2015-01-15 | 2015-05-06 | 上海应用技术学院 | Precise magnetostrictive actuator |
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Application publication date: 20200710 |