CN107339352B - A kind of electromagnetism Electromechanical Coupling Circuit tuning bump leveller - Google Patents
A kind of electromagnetism Electromechanical Coupling Circuit tuning bump leveller Download PDFInfo
- Publication number
- CN107339352B CN107339352B CN201710721345.XA CN201710721345A CN107339352B CN 107339352 B CN107339352 B CN 107339352B CN 201710721345 A CN201710721345 A CN 201710721345A CN 107339352 B CN107339352 B CN 107339352B
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- coil
- mover
- circuit
- digital
- bump leveller
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Classifications
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- 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
- F16F6/00—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid
-
- 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
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
- F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted
Abstract
A kind of electromagnetism Electromechanical Coupling Circuit tuning bump leveller uses faraday's principle of Electromagnetic generation, mover magnetic field, which is cut, by coil converts electric energy for the kinetic energy of vibration, then coil is connected to load circuit, the impedance operator by adjusting load circuit makes circuital current change.Since current-carrying coil can generate Ampere force in magnetic field, different electric currents can generate different size of Ampere force, can also generate different feedback effects to former mechanical system, to cause original machine tool system stiffness and the different of damping to change by electromechanical Coupling.The adjusting of impedance operator can then be realized by digital circuit.Relative to traditional mechanical adjusting, this adjusting in the way of electromagnetic coupling is more rapid and simple, and required control system is also opposite simple and stable, is more conducive to integrated, micromation and low energy consumption the realization of adjustable bump leveller.
Description
Technical field
The invention belongs to mechanical vibration control fields, and in particular to a kind of electromagnetism Electromechanical Coupling Circuit tuning bump leveller.
Background technique
During machine operation, excessive vibration can cause structure and machine badly damaged.In some cases, it vibrates
Inhibition it is especially important, such as the vibration problem in aerospace task.Due to being hindered under weightless and vacuum environment in aerospace
Buddhist nun's very little, can also be with last very long even if small vibration.On the other hand with the promotion of modern life quality, people are to week
The requirement in collarette border is higher and higher, and the control of mechanical oscillation also no longer only contents just to mechanical mechanism design standard, also needs
Sufficiently to meet the needs of people are to engineering goods comfort.
Dynamic vibration absorber is to be invented by Frahm for 1909, it have principle it is simple, it is economical, conveniently, inhibitory effect it is significant
The advantages of, it has a wide range of applications in various vibration control fields.But it also has a very important disadvantage, dynamic vibration absorber
Operating frequency range is very narrow, when the frequency phase-difference of the intrinsic frequency of bump leveller and foundation structure vibration is larger, at this time not only not
It can inhibit the vibration on basis, or even can also play the role of vibration amplification.For this purpose, every field all attempts to inhale traditional power
Vibration device improves, and general there are two types of modes to realize: adjusting bump leveller is intrinsic and adjusts bump leveller damping.By changing absorbing
The rigidity and quality of device can achieve the purpose for changing its intrinsic frequency, using the control method of half active, in certain work
In range, the intrinsic frequency of bump leveller can be made to match always with fundamental vibration frequency, reach optimal inhibitory effect.Separately
A kind of method is to increase the damping of bump leveller, and dynamic vibration absorber its operating frequency range after addition damping will be far longer than without hindrance
Buddhist nun's situation.Certainly the mode of this addition damping can also sacrifice certain vibration control effect, therefore the increase damped is also not
It is the bigger the better, there are an optimal values.
For the adjusting of quality rigidity generally use change mechanical structure, adjust centroid position, increase non-individual body prestressing force,
It adds the modes such as additional active force to realize, these modes are required to the adjusting of mechanical system, and required energy is larger, adjust
Required control system is also relatively complicated, and design and operation cost is all very high.And damp often at the beginning of design just
Through what is designed, it is difficult to realize adjusts again during the work time.These factors make adjustable dynamic vibration absorber application and
Development is restricted.Therefore the tuning manner of only easier economy could make this adjustable bump leveller really obtain
It is widely popularized and applies.
Summary of the invention
The present invention is that a kind of electromagnetism Electromechanical Coupling Circuit tunes bump leveller, it is characterised in that: the electromagnetism mechanical-electric coupling
Circuit tuning bump leveller includes mechanical part and digital circuits section；Mechanical part is made of mover and stator, passes through both ends
Linear bearing is fixed on centre pilot；Stationary part is made of shell and coil, coil be located at mover and side casings it
Between；Digital processing circuit includes A/D module, digital process controller and D/A module, and coil is connected with digital circuit.
It is characterized by: the mover is made of three blocks of armature and two blocks of magnet, two blocks of magnet are respectively at two armature
Between, wherein being topmost fixedly mounted with bottom two blocks of armature, there are two linear bearings；The upper and lower side armature part of mover with
The end housing up and down of stator passes through compressed spring shrink assembly.
It is characterized by: the linear bearing selects linear linear bearing, guide rod slipper is rectangular, control mover
Around the freedom degree of center rotating.
It is characterized by: the stator includes bump leveller shell and coil, lower plate is provided with threaded mounting hole, passes through lower plate
On mounting hole be threadedly coupled the device be mounted on vibrational structure；In the fixation such as location guide spring base and shell；Side
Face shell selects the good material of magnetic property.
It is characterized by: the coil is fixed on close to the position of mover magnet, it is surround with circular multilayer；It is not interfering
Mover reduces the gap between coil and mover in the case where vibrating.
It is characterized by: it includes AD, digital process controller, DA three parts that the digital circuit, which is, the circuit and line
Circle string
Connection forms closed loop, and when coil-induced electric current flows through the circuit, A/D module is translated into digital signal, passes through number
After the PID control processing of word signal processing controller, it is output to DA return circuit.
It is characterized by: the final effect of the digital process controller is equivalent to series resistance and capacitor, equivalent electricity
The size of resistance R and equivalent capacity C should meet:
The impedance operator of the digital circuit of adjusting should meet following equation:
Wherein k is the total equivalent stiffness of spring, and c is mechanical damping suffered when mover vibrates, and ω is structure to be controlled vibration
Dynamic circular frequency, L are the electrodynamic capacity of coil, and B is magnetic field strength locating for coil, and l is the effective length of coil, and μ is to be controlled
Structure equivalent mass processed and mover mass ratio.
The invention has the benefit that
1. a kind of electromagnetism Electromechanical Coupling Circuit of the present invention tunes bump leveller, pass through the circuit portion sub-control of mechanical-electric coupling
System frequency processed solves to have dress with this so that device be made to reach absorbing under the different Typical Vibration frequencies of environment
Set the single problem with regulative mode complexity of working frequency；
2. a kind of electromagnetism Electromechanical Coupling Circuit of the present invention tunes bump leveller, realized by the adjusting of circuit characteristic
The variation of intrinsic frequency, regulative mode is more intelligent, economical, simple relative to mechanical adjustment and stablizes, and is also beneficial to be adjusted
The integrated and micromation of bump leveller.
3. a kind of electromagnetism Electromechanical Coupling Circuit of the present invention tunes bump leveller, the adjusting of circuit characteristic is using number electricity
Road is adjusted, and adjusts continuity and precision is higher, and control is got up also more convenient, the control system energy consumption entirely adjusted also pole
It is low.
Detailed description of the invention
Fig. 1 is mechanical structure portion cross-sectional view of the present invention；
Fig. 2 is circuit part digital processing schematic diagram of the present invention；
Fig. 3 is that the present invention simplifies electromechanical Coupling Model schematic diagram.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawing:
A kind of electromagnetism Electromechanical Coupling Circuit tuning bump leveller, is specifically divided into two parts, a part is machinery as shown in Figure 1
Structure division, another part are circuit parts as shown in Figure 2.The mover of mechanical structure portion is by magnet 6 and 7 groups of armature
At, be fixed on centre pilot 10 by the linear bearing 2 at both ends, it can be achieved that up and down direction it is free to slide, mover up and down
End is respectively by 1 shrink assembly of compressed spring.Stationary part is made of shell and coil, upper 3, lower 9 plates be for location guide
Equal positions, side casings 4 can be matched with mover field circuit, the magnetic field strength that enhancing passes through coil.When the mechanical part
After being mounted on vibrational structure, mover vibrates therewith, 5 cutting magnetic induction line of coil and generate induced current.Coil is connected to number
In word circuit 12, by control algolithm change digital circuit output so that coil where equivalent circuit equivalent resistance and wait
It is adjustable to imitate capacitor.Since the size of current in coil is influenced by circuit impedance and different Ampere forces is produced, this peace
Training power can feed back mechanical system again, change the intrinsic frequency and damping of former mover vibration, when digital process controller allows always
When the intrinsic frequency of mover vibration and damping are in the opposite relatively figure of merit, so that it may achieve the purpose that bump leveller tunes.
Preferably, linear bearing selects linear linear bearing, guide rod slipper be it is rectangular, control mover around center rotating
Freedom degree.
Preferably, side casings select the good material of magnetic property, to reinforce passing through the magnetic field strength of coil magnetic loop.
Preferably, the gap between coil and mover is reduced in the case where not interfering mover to vibrate.
Preferably, it is threadedly coupled by the mounting hole 8 in lower plate and the device is mounted on vibrational structure.
The present invention is that a kind of electromagnetism Electromechanical Coupling Circuit tunes bump leveller, for purpose, the technical solution for implementing the present invention
It is clearer with advantage, technical solution of the present invention is further described in more detail below.In the accompanying drawings, identical from beginning to end
Or similar label indicates same or similar element or element with the same or similar functions.Based on the implementation in the present invention
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The scope of protection of the invention.
A kind of electromagnetism Electromechanical Coupling Circuit of the present invention tunes bump leveller, can be reduced to oscillator-spring-damper system
System can achieve optimal vibration suppression effect when the intrinsic frequency of bump leveller is consistent with the vibration frequency of vibration of foundation structure
Fruit.It is difficult to reach completely the same when frequency is adjusted, can be reduced by adjusting the damping of the invention due to frequency little deviation
And the influence generated.Bump leveller, the either adjusting of frequency are tuned also for inventing a kind of electromagnetism Electromechanical Coupling Circuit
The adjusting for being damping is realized by the adjusting of circuit characteristic where coil.Illustrate its Principles of Regulation and tool in conjunction with Fig. 3
Body implementation method:
Mover gross mass is m, and the global stiffness of compressed spring is k, and the mechanical damping of mover vibration is c, and mover is by permanent magnetic
Iron and armature composition, so can have constant magnetic field around mover, coil is in magnetic field, and when mover vibration, magnetic field is sent out
Raw displacement, it is opposite, coil cutting magnetic induction line and generate induced current.Coil is connected in series with digital circuit simultaneously, passes through control
After the control processing of device, it is equivalent to be connected with a variable resistance R and variable condenser C.It is fixed according to newtonian motion second
The mechanical-electric coupling differential governing equation of the available entire mechanically and electrically road system of the Kirchhoff's current law (KCL) of rule and circuit:
Wherein x is the displacement that mover vibration deviates equipoise, and unit m, B are magnetic field strength provided by mover,
Unit is tesla, and I is the alternating current in circuit, and unit is ampere, and l is the effective length of coil, and unit is rice, and F is outer
The size of exciting force, unit are newton, and ω is the circular frequency of external excitation, and unit is 1/ second, and letter top a little represents the physics
Measure time differential.
The equivalent stiffness and equivalent damping of the system are obtained by Laplace transform to formula (1) are as follows:
When adjusting R and C, equivalent stiffness and equivalent damping size will change, so thatEqual to external excitation
Frequencies omega can be so that the effectiveness in vibration suppression of dynamic vibration absorber be optimal, but this perfect adjusting shape in the realistic case
State is difficult to realize or dynamic excitation frequency is not invariable, so changing to reduce bump leveller to frequency
Susceptibility, need for bump leveller increase damp.Increasing the best size damped isSo according to (2), (3)
The impedance operator of formula, the digital circuit adjusted should meet following equation:
Digital processing circuit of the present invention includes A/D module, digital processing unit and D/A module, and AD is by the simulation of electric current
Signal is converted into digital signal, and digital processing unit carries out the signal to include the operation such as amplitude gain adjusting, phase adjusted, output
Signal exports return circuit after passing through DA, to realize the adjusting to the impedance operator of coil circuit.
Mover quality, spring rate, magnetic field strength, the size of coil effective length and size of the present invention are all can
Become, specific size, it should for a kind of application of the tuning bump leveller of electromagnetism Electromechanical Coupling Circuit described in the invention
To consider and optimize, it is to be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can be with
Various deformations or amendments are made within the scope of the claims, this is not affected the essence of the present invention.
Claims (1)
1. a kind of electromagnetism Electromechanical Coupling Circuit tunes bump leveller, it is characterised in that: the electromagnetism Electromechanical Coupling Circuit, which tunes, inhales
The device that shakes includes mechanical part and digital circuits section；Mechanical part is made of mover and stator, the linear axis that mover passes through both ends
It holds and is fixed on centre pilot；Stationary part is made of shell and coil, and coil is between mover and side casings；Number
Circuit includes A/D module, digital process controller and D/A module, and coil is connected with digital circuit；
The mover is made of three blocks of armature and two blocks of magnet, and two blocks of magnet are respectively between two armature, wherein topmost
There are two linear bearings with bottom two blocks of armature fixed installation；The upper and lower side armature part of mover and the end housing up and down of stator
Pass through compressed spring shrink assembly；
The linear bearing selects linear linear bearing, guide rod slipper be it is rectangular, control mover around center rotating from
By spending；
The stator includes bump leveller shell and coil, and lower plate is provided with threaded mounting hole, passes through the mounting hole spiral shell in lower plate
Stator is mounted on vibrational structure by line connection；Guide rod spring base is fixed on shell；Side casings select magnetic property good
Material；
The coil is fixed on close to the position of mover magnet, is surround with circular multilayer；The case where not interfering mover to vibrate
The lower gap reduced between coil and mover；
The digital circuit be include AD, digital process controller, DA three parts, which connects to form closed loop with coil,
When coil-induced electric current flows through the circuit, A/D module is translated into digital signal, is controlled by the PID of digital process controller
After system processing, it is output to DA return circuit；
The final effect of the digital process controller is equivalent to series resistance and capacitor, equivalent resistance R and equivalent capacity C's
Size should meet:
The impedance operator of the digital circuit of adjusting should meet following equation:
Wherein k is the total equivalent stiffness of spring, and c is mechanical damping suffered when mover vibrates, and ω is structural vibration to be controlled
Circular frequency, L are the electrodynamic capacity of coil, and B is magnetic field strength locating for coil, and l is the effective length of coil, and μ is knot to be controlled
Structure equivalent mass and mover mass ratio.
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| CN201710721345.XA CN107339352B (en) | 2017-08-21 | 2017-08-21 | A kind of electromagnetism Electromechanical Coupling Circuit tuning bump leveller |
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| CN201710721345.XA CN107339352B (en) | 2017-08-21 | 2017-08-21 | A kind of electromagnetism Electromechanical Coupling Circuit tuning bump leveller |
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| CN107339352B true CN107339352B (en) | 2019-08-06 |
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| CN107939901B (en) * | 2017-11-16 | 2019-06-14 | 上海工程技术大学 | A kind of magnetic rheology elastic body semi-active type dynamic vibration absorber and type selecting installation method |
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| CN108343694A (en) * | 2018-03-07 | 2018-07-31 | 武汉理工大学 | A kind of mixed type dynamic vibration absorber using bicyclic concatenation type permanent magnet |
| CN110985582A (en) * | 2019-12-31 | 2020-04-10 | 中科振声（苏州）电子科技有限公司 | Composite electromagnetic type dynamic vibration absorber |
| CN112460178B (en) * | 2020-11-25 | 2024-03-22 | 中国舰船研究设计中心 | Self-tuning low-power actuator, active control system and control method |
| CN112984039A (en) * | 2021-02-24 | 2021-06-18 | 武汉理工大学 | Axial system transverse vibration large-force-value inertial type electromagnetic active control device |
| CN113323989B (en) * | 2021-05-25 | 2022-08-30 | 中国农业大学 | Vibration reduction device for armrest frame of electric mini-tiller and automatic electromagnetic damping optimization method |
| CN113669404B (en) * | 2021-06-25 | 2022-10-21 | 上海工程技术大学 | Magnetorheological elastomer composite vibration absorber device with double-vibrator structure |
| CN114704589B (en) * | 2022-04-21 | 2023-03-24 | 山东大学 | Local resonance type phononic crystal vibration reduction device and equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1016983B (en) * | 1988-11-24 | 1992-06-10 | 清华大学 | Electromagnetic vibration damper with continuously-adjustable spring rigidity |
| JP2004360747A (en) * | 2003-06-03 | 2004-12-24 | Canon Inc | Spring constant variable type magnetic spring device |
| CN101526121B (en) * | 2009-04-17 | 2010-09-08 | 哈尔滨工程大学 | Redundant variable pitch structure semiactive vibration-isolating actuator |
| CN102410336B (en) * | 2011-11-07 | 2014-06-11 | 哈尔滨工程大学 | Coil external type semiactive vibration absorber in enclosed structure |
| CN103291828B (en) * | 2013-04-03 | 2016-01-27 | 哈尔滨工程大学 | Can to connect asymmetric tooth pitch electromagnetic type semi active vibration absorber |
| CN105511513B (en) * | 2015-11-24 | 2018-07-03 | 西安空间无线电技术研究所 | A kind of electromagnetic damping vibration control apparatus of satellite borne equipment |
| CN105909713B (en) * | 2016-05-12 | 2018-08-17 | 哈尔滨工程大学 | A kind of high linearity electromagnetic type semi active vibration absorber |
| CN106286666B (en) * | 2016-10-08 | 2019-06-04 | 中国船舶重工集团公司第七一九研究所 | Reluctance type electromagnetism active vibration absorber |
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