CN112413044A - Ultralow frequency inertial type actuator - Google Patents
Ultralow frequency inertial type actuator Download PDFInfo
- Publication number
- CN112413044A CN112413044A CN202011297351.5A CN202011297351A CN112413044A CN 112413044 A CN112413044 A CN 112413044A CN 202011297351 A CN202011297351 A CN 202011297351A CN 112413044 A CN112413044 A CN 112413044A
- Authority
- CN
- China
- Prior art keywords
- annular
- armature
- type actuator
- wall
- inertial type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/03—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using magnetic or electromagnetic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/06—Magnetic or electromagnetic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F2228/00—Functional characteristics, e.g. variability, frequency-dependence
- F16F2228/06—Stiffness
- F16F2228/063—Negative stiffness
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Mechanical Engineering (AREA)
- Reciprocating, Oscillating Or Vibrating Motors (AREA)
Abstract
The invention discloses an ultralow-frequency inertial actuator which comprises a rotor assembly and a stator assembly, wherein the rotor assembly comprises an armature and an annular permanent magnet, the annular permanent magnet is arranged on the outer wall of the armature, the stator assembly comprises an end cover, a coil, a shell and a base, the coil is arranged on the inner wall of the shell, the end cover and the base are respectively connected with the top and the bottom of the shell, the ultralow-frequency inertial actuator also comprises a passive supporting element, the passive supporting element comprises an annular spring piece and a spiral spring, the annular spring piece and the spiral spring are arranged between the shell and the armature, the annular spring piece and the spiral spring are horizontally and parallelly arranged, and the spiral spring is always in a pre-compression state. The invention adopts the negative stiffness technology, reduces the dynamic stiffness of the system on the premise of not influencing the static stiffness of the system, thereby leading the inertial type actuator to have high static stiffness and low dynamic stiffness simultaneously and finally realizing stable ultralow frequency inertial force output.
Description
Technical Field
The invention relates to the field of active vibration reduction, in particular to an ultralow-frequency inertial type actuator.
Background
Due to the inherent defect that parameters are not adjustable in a passive vibration reduction mode, the vibration active control technology gets more and more attention in the field of low-frequency vibration reduction. As an important part in the vibration active control system, the actuator is used for converting an output signal of the power amplifier into force output, and the quality of the output performance of the actuator directly influences the vibration reduction effect of the system.
Among various types of actuators, the inertial type actuator has been widely used due to advantages such as a simple structure, good environmental adaptability, stable operation, and good output linearity. When alternating current is conducted in a coil of the inertial type actuator, alternating acting force can be generated between the coil and the permanent magnet, the permanent magnet and the mass block reciprocate, the resultant force of Lorentz force and spring force borne by the coil is equal to the inertial force of the reciprocating mass block, and therefore the output force of the inertial type actuator is equal to the inertial force of the moving mass block. Since the inertial actuator has the highest output force in a frequency band around the system natural frequency, the system natural frequency is often adjusted to a desired frequency in practical applications, and the maximum control force output effect is achieved with the minimum energy consumption.
In the field of active vibration control, actuators are used to manage low frequency line spectrum vibrations, and in some cases the required output frequency is low, so the system natural frequency of inertial actuators needs to be designed very low. The lower natural frequency means less supporting rigidity, which has a great influence on the stability of the actuator in practical application, and in some cases, the static instability phenomenon of the actuator mover even occurs. For the reasons, the existing inertial type actuator product is difficult to realize ultralow frequency actuating power output.
Disclosure of Invention
The invention aims to provide an ultralow-frequency inertial type actuator, which solves the problem that the existing inertial type actuator cannot effectively output ultralow-frequency actuating power when treating low-frequency line spectrum vibration.
The invention is realized by the following technical scheme:
the utility model provides an ultralow frequency inertial type actuator, includes active cell subassembly and stator module, the active cell subassembly includes armature and annular permanent magnet, the annular permanent magnet is installed on the armature outer wall, stator module includes end cover, coil, casing and base, the coil is installed on shells inner wall, end cover and base are connected with the top and the bottom of casing respectively, still include passive support element, passive support element includes annular spring leaf and coil spring, and annular spring leaf and coil spring install between casing and armature, annular spring leaf and coil spring level and parallel arrangement, coil spring is in the precompression state all the time.
The annular permanent magnet, the armature and the coil form an active actuating mechanism to generate inertia force; the spring piece provides positive rigidity support for supporting the inertial mass and providing static rigidity; the horizontal spiral spring is always in a pre-compression state and used for providing negative stiffness, offsetting positive stiffness of the system and reducing the overall dynamic stiffness of the inertia actuating system. By reasonably adjusting the positive and negative stiffness of the system, the natural frequency of the inertia actuating system can approach zero infinitely, and the purpose of outputting ultralow-frequency inertia actuating power is further realized.
The design process of the passive support element (mainly comprising the spring piece and the spiral spring) comprises the following steps: firstly, calculating the axial mechanical characteristics of the spring piece by adopting finite element software, determining a spring piece rigidity characteristic curve, and selecting a proper spring piece size according to the vibration reduction requirement; secondly, fitting a spring piece rigidity characteristic curve by adopting a least square method to determine the approximate linear rigidity of the system; and finally, performing stress analysis on the horizontal pre-compressed spiral spring, determining the negative stiffness required to be provided by the horizontal pre-compressed spring system according to the fitted approximate linear stiffness of the spring piece, and reversely deducing the stiffness value and the pre-compression amount of the horizontal spiral spring based on the negative stiffness value to determine the design size of the horizontal spiral spring.
In summary, the invention simultaneously arranges the annular spring piece and the spiral spring, the spring piece provides positive stiffness support to provide static stiffness, the spiral spring is used for providing negative stiffness to offset the positive stiffness of the system, and a negative stiffness technology is introduced to reduce the dynamic stiffness of the system on the premise of not influencing the static stiffness of the system, so that the inertial type actuator simultaneously has high static stiffness and low dynamic stiffness, and finally realizes stable ultralow-frequency inertial force output. Therefore, the invention solves the problem that the existing inertial type actuator can not effectively output ultralow frequency actuating power when treating low frequency line spectrum vibration.
Further, an annular spring piece is provided outside the coil spring.
Furthermore, the inner side end and the outer side end of the annular spring piece are respectively connected with the outer wall of the armature and the inner wall of the shell through screws.
Furthermore, a first annular groove used for installing an annular spring piece is formed in the outer wall of the armature, and a second annular groove used for installing the annular spring piece is formed in the inner wall of the shell.
Further, the outer wall of the armature is provided with a first ring clamping groove for mounting the spiral spring, and the inner wall of the shell is provided with a second ring clamping groove for mounting the spiral spring.
Further, the coil is provided with 2 groups, 2 groups of coils respectively correspond to the upper end and the lower end of the annular permanent magnet, and an air gap is formed between the annular permanent magnet and the coil.
Further, the end cap and the base are respectively connected with the top and the bottom of the shell through screws.
Further, the inner wall of the shell is provided with an annular groove for mounting the coil.
Furthermore, the annular permanent magnet and the shell are both made of high-magnetic-permeability materials.
Further, the armature is of a split structure.
The installation of the annular permanent magnet is convenient.
Compared with the prior art, the invention has the following advantages and beneficial effects:
compared with the existing inertial type actuator, the inertial type actuator has the advantages that the negative stiffness technology is integrated into the passive support design of the inertial type actuator, the spring piece keeps the advantage of high static support stability of an inertial type actuating system of the traditional actuator, the newly introduced negative stiffness technology greatly reduces the dynamic stiffness of the system, and the problem that the traditional inertial type actuator cannot output stable ultralow-frequency inertial force is solved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic view of the construction of an ultralow frequency inertial type actuator according to the present invention;
fig. 2 is a two-dimensional axial symmetry diagram of the electromagnetic actuating mechanism.
Reference numbers and corresponding part names in the drawings:
1-end cover, 2-coil, 3-armature, 4-base, 5-annular spring piece, 6-shell, 7-annular permanent magnet and 8-spiral spring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1:
as shown in fig. 1 and 2, an ultra-low frequency inertial type actuator includes a mover assembly and a stator assembly, the mover assembly includes an armature 3 and a ring-shaped permanent magnet 7, the ring-shaped permanent magnet 7 is mounted on an outer wall of the armature 3, the stator assembly includes end caps 1 and 2 sets of coils 2, a housing 6 and a base 4, the coils 2 are mounted on an inner wall of the housing 6, and in actual application, the coils 2 can be mounted in an auxiliary supporting manner by using coil formers, the coils 2 of the 2 sets correspond to upper and lower ends of the ring-shaped permanent magnet 7, an air gap is formed between the ring-shaped permanent magnet 7 and the coils 2, the armature 3 and the housing 6 are made of high-permeability materials, and can be made of electrical pure iron, the end caps 1 and the base 4 are connected to top and bottom of the housing 6, the end caps 1 are used for protecting an internal structure of, Annular permanent magnet 7 provides the inertial mass of actuator, armature 3, annular permanent magnet 7 and the coaxial setting of casing 6 still include passive support element, passive support element includes annular spring piece 5 and coil spring 8, and annular spring piece 5 and coil spring 8 are installed between casing 6 and armature 3, annular spring piece 5 and coil spring 8 level and parallel arrangement, coil spring 8 is in the precompression state all the time.
In the embodiment, magnetic lines of force generated by the annular permanent magnet 7 are distributed along the armature 3, the air gap, the coil 2 and the shell 6, when the coil 2 is introduced with stable alternating current, a lorentz force related to the magnitude of current is generated between the coil 2 and the armature 3 and is transmitted on the base 4 through the passive support system, and the output of inertial force is realized.
Example 2:
as shown in fig. 1 and 2, in the present embodiment, based on embodiment 1, the annular spring piece 5 is disposed outside the coil spring 8; the inner side end and the outer side end of the annular spring piece 5 are respectively connected with the outer wall of the armature 3 and the inner wall of the shell 6 through screws; a first annular groove for mounting the annular spring piece 5 is formed in the outer wall of the armature 3, and a second annular groove for mounting the annular spring piece 5 is formed in the inner wall of the shell 6; a first annular clamping groove for mounting the spiral spring 8 is formed in the outer wall of the armature 3, and a second annular clamping groove for mounting the spiral spring 8 is formed in the inner wall of the shell 6; the end cover 1 and the base 4 are respectively connected with the top and the bottom of the shell 6 through screws; the inner wall of the shell 6 is provided with an annular groove for mounting the coil 2; the armature 3 is of a separate structure.
In the embodiment, the detachable connection of each part can be realized, and the installation is convenient.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. An ultralow frequency inertial type actuator comprises a rotor component and a stator component, wherein the rotor component comprises an armature (3) and an annular permanent magnet (7), the annular permanent magnet (7) is arranged on the outer wall of the armature (3), the stator component comprises an end cover (1), a coil (2), a shell (6) and a base (4), the coil (2) is arranged on the inner wall of the shell (6), the end cover (1) and the base (4) are respectively connected with the top and the bottom of the shell (6), it is characterized by also comprising a passive support element, wherein the passive support element comprises an annular spring piece (5) and a spiral spring (8), the annular spring piece (5) and the spiral spring (8) are arranged between the shell (6) and the armature (3), the annular spring piece (5) and the spiral spring (8) are horizontally and parallelly arranged, and the spiral spring (8) is always in a pre-compression state.
2. The ultra low frequency inertial type actuator according to claim 1, wherein the annular spring plate (5) is disposed outside the coil spring (8).
3. The ultralow frequency inertial type actuator according to claim 1, wherein the inner end and the outer end of the annular spring plate (5) are connected to the outer wall of the armature (3) and the inner wall of the housing (6) by screws, respectively.
4. The ultra low frequency inertial type actuator according to claim 4, characterized in that the outer wall of the armature (3) is provided with a first annular groove for mounting the annular spring plate (5), and the inner wall of the housing (6) is provided with a second annular groove for mounting the annular spring plate (5).
5. The ultralow frequency inertial type actuator according to claim 1, wherein the outer wall of the armature (3) is provided with a first annular groove for mounting the coil spring (8), and the inner wall of the housing (6) is provided with a second annular groove for mounting the coil spring (8).
6. The ultra low frequency inertial type actuator according to claim 1, characterized in that the coils (2) are provided with 2 sets of coils (2), the 2 sets of coils (2) corresponding to the upper and lower ends of the annular permanent magnet (7), respectively, and an air gap is formed between the annular permanent magnet (7) and the coils (2).
7. The ultra low frequency inertial type actuator according to claim 1, characterized in that the end cap (1) and the base (4) are screwed to the top and bottom of the housing (6), respectively.
8. The ultra low frequency inertial type actuator according to claim 1, characterized in that the inner wall of the housing (6) is provided with an annular groove for mounting the coil (2).
9. The ultra low frequency inertial type actuator according to any one of claims 1 to 8, characterized in that the annular permanent magnet (7) and the housing (6) are made of high permeability material.
10. The ultra low frequency inertial type actuator according to any one of claims 1 to 8, characterized in that the armature (3) is of a split structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011297351.5A CN112413044A (en) | 2020-11-18 | 2020-11-18 | Ultralow frequency inertial type actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011297351.5A CN112413044A (en) | 2020-11-18 | 2020-11-18 | Ultralow frequency inertial type actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112413044A true CN112413044A (en) | 2021-02-26 |
Family
ID=74773969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011297351.5A Pending CN112413044A (en) | 2020-11-18 | 2020-11-18 | Ultralow frequency inertial type actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112413044A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898693A (en) * | 2021-10-22 | 2022-01-07 | 合肥工业大学 | Vibration damping actuator |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106594169A (en) * | 2016-12-23 | 2017-04-26 | 苏州东菱智能减振降噪技术有限公司 | Quasi-zero rigidity inertia actuator |
| CN106641087A (en) * | 2015-11-04 | 2017-05-10 | 株洲时代新材料科技股份有限公司 | Electromagnetic type active vibration absorber |
| CN109737163A (en) * | 2019-02-25 | 2019-05-10 | 株洲时代新材料科技股份有限公司 | A kind of moving-coil type actuator for Active engine mount |
| KR102097941B1 (en) * | 2018-12-12 | 2020-04-07 | 한국과학기술원 | Vibration reduction device for sensor |
| CN111810757A (en) * | 2020-07-23 | 2020-10-23 | 中国核动力研究设计院 | Initiative gallows device suitable for pipeline damping |
| CN111828525A (en) * | 2020-07-23 | 2020-10-27 | 中国核动力研究设计院 | Novel electromagnetic vibration isolator with adjustable negative stiffness |
| CN111828524A (en) * | 2020-07-23 | 2020-10-27 | 中国核动力研究设计院 | Novel electromagnetic negative stiffness vibration isolator with high radial stability |
-
2020
- 2020-11-18 CN CN202011297351.5A patent/CN112413044A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106641087A (en) * | 2015-11-04 | 2017-05-10 | 株洲时代新材料科技股份有限公司 | Electromagnetic type active vibration absorber |
| CN106594169A (en) * | 2016-12-23 | 2017-04-26 | 苏州东菱智能减振降噪技术有限公司 | Quasi-zero rigidity inertia actuator |
| KR102097941B1 (en) * | 2018-12-12 | 2020-04-07 | 한국과학기술원 | Vibration reduction device for sensor |
| CN109737163A (en) * | 2019-02-25 | 2019-05-10 | 株洲时代新材料科技股份有限公司 | A kind of moving-coil type actuator for Active engine mount |
| CN111810757A (en) * | 2020-07-23 | 2020-10-23 | 中国核动力研究设计院 | Initiative gallows device suitable for pipeline damping |
| CN111828525A (en) * | 2020-07-23 | 2020-10-27 | 中国核动力研究设计院 | Novel electromagnetic vibration isolator with adjustable negative stiffness |
| CN111828524A (en) * | 2020-07-23 | 2020-10-27 | 中国核动力研究设计院 | Novel electromagnetic negative stiffness vibration isolator with high radial stability |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898693A (en) * | 2021-10-22 | 2022-01-07 | 合肥工业大学 | Vibration damping actuator |
| US11585404B1 (en) | 2021-10-22 | 2023-02-21 | Hefei University Of Technology | Vibration damping actuator |
| CN113898693B (en) * | 2021-10-22 | 2024-04-19 | 合肥工业大学 | Vibration damping actuator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109139760B (en) | Quasi-zero stiffness vibration isolator with positive stiffness and negative stiffness connected in parallel | |
| US4327257A (en) | Alignment device for electro-acoustical transducers | |
| CN1121809C (en) | Loudspeaker | |
| WO2021135069A1 (en) | Composite electromagnetic type dynamic vibration absorber | |
| US11758331B2 (en) | Balanced vibration system | |
| CN105485230B (en) | Electromagnetic semi-active vibration isolator achieving quasi-zero rigidity characteristic through asymmetric magnetic tooth structure | |
| CN110855118A (en) | Cylindrical voice coil motor magnetic gravity compensator, voice coil motor and voice coil motor assembly | |
| CN112696455B (en) | Quasi-zero stiffness electromagnetic vibration isolator suitable for ultralow frequency vibration reduction and isolation | |
| US10844927B2 (en) | Stiffness-adjustable electromagnetic spring | |
| US20210227331A1 (en) | Loudpseakers | |
| CN111828525B (en) | Novel electromagnetic vibration isolator with adjustable negative stiffness | |
| CN112413044A (en) | Ultralow frequency inertial type actuator | |
| CN218336396U (en) | Loudspeaker | |
| CN211209558U (en) | Cylindrical voice coil motor magnetic gravity compensator, voice coil motor and voice coil motor assembly | |
| CN102506989B (en) | Speed-type vibration sensor with adjustable magnetic circuit | |
| CN111102293A (en) | Active and passive magnetic-gas hybrid bearing | |
| CN101324255B (en) | Controllable type permanent magnetism magnetic suspension vibration damping spring with air damping cavity | |
| CN205350179U (en) | Adopt asymmetric magnetism tooth structure to realize half initiative isolator of electromagnetic type of zero accurate rigidity characteristic | |
| CN110439961B (en) | Reluctance type electromagnetic active and passive integrated composite vibration isolator | |
| CN211209895U (en) | Be applied to electrodynamic type transducer unit of in-ear earphone | |
| CN211371134U (en) | Reluctance type electromagnetic active and passive integrated composite vibration isolator | |
| CN113595354A (en) | Vibration energy source collecting device | |
| CN1230693A (en) | Vibration sensor | |
| CN218830615U (en) | Loudspeaker | |
| CN217216250U (en) | Actuator with adjustable natural frequency |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210226 |
|
| RJ01 | Rejection of invention patent application after publication |