CN1291175C - Magnetorheological fluid damp type dynamic vibration absorber and method of mounting thereof - Google Patents
Magnetorheological fluid damp type dynamic vibration absorber and method of mounting thereof Download PDFInfo
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- CN1291175C CN1291175C CN 02131043 CN02131043A CN1291175C CN 1291175 C CN1291175 C CN 1291175C CN 02131043 CN02131043 CN 02131043 CN 02131043 A CN02131043 A CN 02131043A CN 1291175 C CN1291175 C CN 1291175C
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- vibration absorber
- type dynamic
- dynamic vibration
- linear motor
- magnetic rheological
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Abstract
The present invention relates to a magnetic rheological fluid damping type dynamic vibration absorber comprising a linear motor with a linear guide rail, a supporting frame, a magnetic rheological fluid damper and a metal spring. The installation method comprises the following steps: 1. the vibration frequency range of a damped object is measured according to requirements; 2. the minimum of a main quality displacement variance is determined, established and used as an objective function based on a neural network technique; 3. the installation position, the quality and the change ranges of the damping coefficient and the rigidity coefficient of the damper are determined in a numerical simulation method; 4. the installation of the magnetic rheological fluid damping type dynamic vibration absorber is finished by the parameters. The magnetic rheological fluid damping type dynamic vibration absorber has the advantages that the magnetic rheological fluid damping type dynamic vibration absorber changes the frequencies of inertia force and control force on an object which needs to be damped by utilizing the magnitude of the linear motion speed and the movement distance of a direct current motor, and the damping coefficient is changed by the magnetic rheological fluid damper; thereby, conditions which can be operated simply are provided for vibrated active control, and active dampers have good non-linear damping performance.
Description
(1) technical field:
The present invention relates to a kind of vibration damping equipment that is applied on building structure and the machinery, particularly a kind of magnetorheological fluid damp type dynamic vibration absorber.
(2) background technique:
According to traditional Vibration Absorption Designing thought, the damping of common vibration insulating system is unsuitable excessive.If singly be from resonance control viewpoint, wish the damping value of increase system, reach and reduce the resonance transmissibility, with restriction resonance amplitude.If but from simple vibration damping angle, the increase of damping value can reduce effectiveness in vibration suppression.In the common design method, a kind of is to make the resonant frequency of system avoid energizing frequency as far as possible, to obtain the favorable damping design effect; Another kind is when the energizing frequency broad, the resonant frequency of system can not be avoided energizing frequency or when being difficult to avoid, can only suitably increase the damping value of system, makes vibration insulating system both have reasonable effectiveness in vibration suppression, take into account resonance control again, amplification makes it to have certain control ability to resonance.No matter this obviously practice is that resonance control or dither are isolated, and all can not reach the optimal design effect.Be to adapt to the optiumum control requirement of stochastic vibration, the Bandwidth of vibration damping, low frequency performance are good, make the equal can regulate of parameter such as control force frequency and damping, just become the task of top priority with the active damping dynamic shock absorber that can realize " optimal tuning ".
(3) summary of the invention:
The objective of the invention is to design a kind of magnetorheological fluid damp type dynamic vibration absorber, it can adapt to the optiumum control requirement of stochastic vibration, making the equal can regulate of parameter such as control force frequency and damping, is a kind of active damping dynamic shock-absorbing device that can realize " optimal tuning ".
Technological scheme of the present invention: a kind of magnetorheological fluid damp type dynamic vibration absorber, it is characterized in that it is by the linear motor that contains linear rail, bearing support, magnetic rheological liquid damper and metal spring constitute, said bearing support is one to comprise that base plate and sidewall are the support of " recessed " type, the linear rail level of linear motor is installed on the sidewall at bearing support two ends, 2n magnetic rheological liquid damper is installed in respectively between bearing support one sidewall and linear motor and linear motor and another bearing support one sidewall, n is 1-4,2n metal spring also is installed in respectively between bearing support one sidewall and linear motor and linear motor and another bearing support one sidewall and is parallel with the linear rail of linear motor, and n also is 1-4.
Above-mentioned said magnetic rheological liquid damper can adopt the electromagnetic type damper to substitute.
Above-mentioned said linear motor can adopt electric rotating machine mate gear speed reducer and screw mechanism to substitute.
Above-mentioned said linear motor can adopt electric rotating machine mate gear speed reducer and pinion and rack to substitute.
The installation method of above-mentioned magnetorheological fluid damp type dynamic vibration absorber, it is characterized in that it is made up of following steps: (1) measures the vibration frequency range of vibration damping object as required; (2) determine to set up with principal mass displacement variance minimum as objective function based on nerual network technique; (3) utilize numerical value emulation method to determine the mounting point of vibration damper and the excursion of quality and damping constant and stiffness coefficient; (4) utilize above-mentioned parameter to finish the installation magnetorheological fluid damp type dynamic vibration absorber.
Above-mentioned said nerual network technique can be input variable with mounting point, quality, damping constant and the stiffness coefficient of magnetorheological fluid damp type dynamic vibration absorber, as objective function, determined that the input variable of the best is made function software by the displacement variance minimum of vibration damping object.
Above-mentioned said installation method adopts mounting point, quality and is obtained to control the method for the vibration of multistage mode with a spot of magnetorheological fluid damp type dynamic vibration absorber by the displacement variance parameter of vibration damping object in installation.
Working procedure of the present invention and working principle are: bearing support firmly is installed on the object that needs vibration damping, and the linear motor, metal spring, magnetic rheological liquid damper and the relevant controlling device that are had associated mass by bearing support constitute active damper.Utilize the movement velocity and the displacement distance size of direct current motor to change inertial force (stiffness term) and control force frequency; Because the size of electric current becomes non-linear relation with damping, utilize the variation of electric current [strength in the electromagnetic coil can change damping constant easily, thereby for the ACTIVE CONTROL of vibration provides simple condition, make dynamic shock absorber have good nonlinear vibration reduction performance, keep best " together with shaking " state of a control always.Need carry out the object of vibration control because the installation of dynamic shock absorber can make the dynamic characteristic of its structure change; The frequency spectrum that is subjected to the structural response of arbitrary excitation to have continuous distributed is comprising various frequency components.In view of the above, at the vibration system under the different random vibration, setting up with principal mass displacement variance based on nerual network technique is the objective function of minimum, try to achieve the mounting point of vibration damper and the excursion of quality, damping constant and stiffness coefficient by numerical simulation, make vibration damper obtain best effectiveness in vibration suppression.
Superiority of the present invention is: 1, the present invention is needing on the object of vibration damping, utilizes the point-to-point speed of direct current motor and displacement distance size to change inertial force (stiffness term) and control force frequency; 2, the present invention utilizes the size of current in the magnetic flow liquid to become the characteristics of non-linear relation to adopt magnetic rheological liquid damper with damping, change damping constant easily, thereby, make active damper have good nonlinear vibration reduction performance for the ACTIVE CONTROL of vibration provides simple condition; 3, at the vibration system under the stochastic vibration, set up with principal mass displacement variance minimum as objective function based on neural net method, determine the mounting point of vibration damper and the excursion of quality and damping constant and stiffness coefficient by the numerical simulation method, make bump leveller obtain best shock attenuation result; 4, design is ingenious, simple in structure, and flexible operation has the excellent development prospect in the vibration damping field.
(4) description of drawings:
Accompanying drawing 1 is the user mode structural representation of the related a kind of magnetorheological fluid damp type dynamic vibration absorber of the present invention.
Accompanying drawing 2 is the structure for amplifying schematic representation of the related a kind of magnetorheological fluid damp type dynamic vibration absorber of the present invention.
Accompanying drawing 3 is that the A of Fig. 2 is to schematic representation.
Accompanying drawing 4 is the user mode effect contrast figure of the related a kind of magnetorheological fluid damp type dynamic vibration absorber of the present invention (Fig. 4-a is before bump leveller uses, and Fig. 4-b is that bump leveller uses the back).
Wherein: 1 is linear motor, and 1a is a linear rail, and 2 is bearing support, and 3 is building, and 4 is metal spring, and 5 is magnetic rheological liquid damper.
(5) embodiment:
Embodiment: a kind of magnetorheological fluid damp type dynamic vibration absorber (seeing Fig. 1-3), it is characterized in that it is by the linear motor 1 that contains linear rail, bearing support 2, magnetic rheological liquid damper 5 and metal spring 4 constitute, said bearing support 2 is one to comprise that base plate and sidewall are the support of " recessed " type, the linear rail 1a level of linear motor 1 is installed on the sidewall at bearing support 2 two ends, 2 magnetic rheological liquid dampers 5 are installed in respectively between bearing support 2 one sidewalls and linear motor 1 and linear motor 1 and another bearing support 2 one sidewalls, and 4 metal springs 4 also are installed in respectively between bearing support 2 one sidewalls and linear motor 1 and linear motor 1 and another bearing support 2 one sidewalls and are parallel with the linear rail 1a of linear motor 1.
The installation method of above-mentioned magnetorheological fluid damp type dynamic vibration absorber is characterized in that it is made up of following steps:
(1) measures as required the vibration frequency range of vibration damping object, can adopt the vibration acceleration meter Record vibration frequency;
(2) determine to set up with principal mass square difference of displacement minimum as the target letter based on nerual network technique Number is with installation site, quality, damped coefficient and the stiffness coefficient of magnetorheological fluid damp type dynamic vibration absorber Be input variable, as object function, determined that best input becomes by the square difference of displacement minimum of vibration damping object Amount is made function software;
(3) utilize numerical value emulation method to determine installation site and quality and the damped coefficient and firm of shock absorber The excursion of degree coefficient is determined iterations and precision, determines that the installation site of shock absorber and quality reach The optimal values of damped coefficient and stiffness coefficient; Adopt installation site, quality and by the displacement of vibration damping object Variance parameter obtains with the vibration with a small amount of magnetorheological fluid damp type dynamic vibration absorber control multi-modes Method;
(4) utilize above-mentioned parameter to finish the installation magnetorheological fluid damp type dynamic vibration absorber.
Claims (4)
1, a kind of magnetorheological fluid damp type dynamic vibration absorber, it is characterized in that it is by the linear motor that contains linear rail, bearing support, magnetic rheological liquid damper and metal spring constitute, said bearing support is one to comprise that base plate and sidewall are the support of " recessed " type, the linear rail level of linear motor is installed on the sidewall at bearing support two ends, 2n magnetic rheological liquid damper is installed in respectively between bearing support one sidewall and linear motor and linear motor and another bearing support one sidewall, n is 1-4,2n metal spring also is installed in respectively between bearing support one sidewall and linear motor and linear motor and another bearing support one sidewall and is parallel with the linear rail of linear motor, and n also is 1-4.
2,, it is characterized in that said magnetic rheological liquid damper adopts the electromagnetic type damper to substitute according to the said a kind of magnetorheological fluid damp type dynamic vibration absorber of claim 1.
3,, it is characterized in that said linear motor adopts electric rotating machine mate gear speed reducer and screw mechanism to substitute according to the said a kind of magnetorheological fluid damp type dynamic vibration absorber of claim 1.
4,, it is characterized in that said linear motor adopts electric rotating machine mate gear speed reducer and pinion and rack to substitute according to the said a kind of magnetorheological fluid damp type dynamic vibration absorber of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02131043 CN1291175C (en) | 2002-09-26 | 2002-09-26 | Magnetorheological fluid damp type dynamic vibration absorber and method of mounting thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02131043 CN1291175C (en) | 2002-09-26 | 2002-09-26 | Magnetorheological fluid damp type dynamic vibration absorber and method of mounting thereof |
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| Publication Number | Publication Date |
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| CN1485554A CN1485554A (en) | 2004-03-31 |
| CN1291175C true CN1291175C (en) | 2006-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 02131043 Expired - Fee Related CN1291175C (en) | 2002-09-26 | 2002-09-26 | Magnetorheological fluid damp type dynamic vibration absorber and method of mounting thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101618547B (en) * | 2009-07-16 | 2011-04-06 | 重庆大学 | Robot anklebone damping device |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100441902C (en) * | 2005-12-06 | 2008-12-10 | 中国科学技术大学 | Mechanical frequency-shift type power shock absorber and control method |
| CN100346088C (en) * | 2006-05-08 | 2007-10-31 | 天津商学院 | Magnetorheological liquid damping type dynamic vibration absorber |
| DE102011008625A1 (en) * | 2011-01-14 | 2012-07-19 | Audi Ag | Spring and damper system, in particular for an assembly storage in a motor vehicle |
| CN103867634B (en) * | 2014-03-25 | 2015-09-09 | 长安大学 | A kind of controlling method of mutative damp dynamic vibration absorber |
| CN105965474B (en) * | 2016-03-25 | 2018-07-27 | 合肥工业大学 | Varistructure parameter Compliant Assembly vibration absorber |
| CN114658789B (en) * | 2022-03-18 | 2024-03-22 | 中车青岛四方机车车辆股份有限公司 | Control method, device and equipment of magneto-rheological damper and readable storage medium |
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2002
- 2002-09-26 CN CN 02131043 patent/CN1291175C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101618547B (en) * | 2009-07-16 | 2011-04-06 | 重庆大学 | Robot anklebone damping device |
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| CN1485554A (en) | 2004-03-31 |
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