CN102205308B - Force-controlled electromagnetic permanent magnetic composite excitation vibration platform - Google Patents

Force-controlled electromagnetic permanent magnetic composite excitation vibration platform Download PDF

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Publication number
CN102205308B
CN102205308B CN 201110030610 CN201110030610A CN102205308B CN 102205308 B CN102205308 B CN 102205308B CN 201110030610 CN201110030610 CN 201110030610 CN 201110030610 A CN201110030610 A CN 201110030610A CN 102205308 B CN102205308 B CN 102205308B
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magnetic energy
permanent magnet
vibration platform
power control
excited vibration
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CN102205308A (en
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杨斌堂
孟光
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Shanghai Jiaotong University
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Shanghai Jiaotong University
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Abstract

The invention discloses a force-controlled electromagnetic permanent magnetic composite excitation vibration platform in the technical field of electromagnetic drivers. The force-controlled electromagnetic permanent magnetic composite excitation vibration platform comprises a shell, electromagnetic coils, magnetic energy bodies and a carrying mechanism, wherein the two magnetic energy bodies are respectively arranged inside the shell in a manner of a horizontal rotating shaft and are in mutual contact, the two electromagnetic coils are respectively arranged inside the shell and positioned at two sides of the magnetic energy bodies, and the carrying mechanism is movably arranged on the top of the shell and is in contact with one magnetic energy body. The force-controlled electromagnetic permanent magnetic composite excitation vibration platform is a wide-band large-load and large-displacement vibration device or equipment which has the advantages of simple structure, high reliability and drive efficiency, no moving coil and lead following dragging hidden dangers, accuracy and controllability of amplitude and capability of realizing frequency of below 5Hz, i.e. from quasi-static to high frequency, and is driven by direct displacement generated by the electrically-excited rigid magnetic energy bodies.

Description

The electromagnetic permanent magnet combined excited vibration platform of power control type
Technical field
What the present invention relates to is a kind of device of electromagnetic driver technical field, specifically the electromagnetic permanent magnet combined excited vibration platform of a kind of power control type.
Background technology
In the last few years, because the needs of vibration-testing under the work condition environment of space flight, aviation, navigational field aircraft or precision equipment, the demand of high-performance vibration test equipment was more and more urgent.At present vibratory equipment mainly contains hydraulic pressure, pneumatic, electromagnetism and mechanical vibration equipment several types.Wherein hydraulic pressure, pneumatic and mechanical vibratory equipment is because attainable driving frequency is low, drives the requirement how controlling unit can not be fit to the field vibration-testing performance such as space flight.Electromagnetic Drive is owing to adopting electromagnetic signal control, the realization that drives realizes by the electromagnetic energy effect, control is convenient, response is sensitive, is particularly suitable for realizing the realization of dither equipment, and therefore the most driving links of Electromagnetic Drive that adopt of present high-performance vibratory equipment realize.Such as the electromagnetic vibration generator system of Britain Ling company, its device drives principle of work is based on the voice coil motor drive principle, and drive coil drives a mover that is suspended in drive coil central authorities as stator by alternating electromagnetic force usually, produces vibration.Yet, also there is obvious defective in this class Electromagnetic Drive shaking table, mainly be because mover is in the suspension duty all the time, the following vibratory drive of 5Hz is difficult to realize, in the driving process since this suspension driving so that the moving rigidity in the driving process is not enough, its high-frequency drive displacement is less in addition, and the driving amplitude out of true drives energy consumption larger.
Find through the retrieval to prior art, China Patent No. ZL200820087256.0 applying date 2008-5-16, put down in writing a kind of " a kind of electromagnetic vibration generator system ", this technology comprises stage body, stage body comprises the first magnet, First Transition piece, center conducting magnetic column, the second transition block, the second magnet, is arranged with moving-coil on the conducting magnetic column of center; Also comprise sports platform and two frame shape air-float guide rails, sports platform is located in the air-float guide rail slidably; Also comprise drive motor, the screw mandrel that is attached thereto, screw mandrel is connected with a planker, and lead-in wire and tracheae all are connected with planker; Grating scale also is installed on the air-float guide rail, the communication block that also is provided with the grating reading head relative with grating scale on the sports platform and is connected with grating reading head, communication block is connected with a controller, and drive motor is connected with controller signals.This patent advantage has been to provide a kind of electromagnetic vibration generator system with complete peripherals, be synchronized with the movement by controller control motor-driven screw mandrel traction planker accompany movement platform, the additional force that makes draft tube and connect electrical lead does not affect the degree of distortion of the large stroke of shaking table and low frequency waveform.
But the prior art is the voice coil motor drive form by " being provided with moving-coil " to be realized, and demand motive motor, the screw mandrel that is attached thereto etc. drive transmission link.Like this, the vibratory equipment that drives based on moving-coil at first exists difficultly can't realize that maybe 5Hz is with interior low frequency driving, and parts and link that its driving relates to are many, also need motor and leading screw screw body to be synchronized with the movement by control traction planker accompany movement platform in the driving, and have draft tube and connect involving and the spinoff such as additional force of electrical lead, make whole platform can not realize directly driving efficiently and high reliability drives.
Summary of the invention
The present invention is directed to the prior art above shortcomings, provide a kind of power control type electromagnetic permanent magnet combined excited vibration platform, utilize the magnetic energy body of direction abnormity under electricity, magnetic pumping effect, to produce magnetic pole deflection and make the magnetic energy body of direction abnormity in the process that its length direction changes, produce the effect that the mechanism that is in contact with it is produced the direct promotion of rigidity, and produce the large effect that drives.This device realize by electric magnetization rigidity magnetic energy body produce a kind of simple in structure, the reliability of direct displacement drive and drive efficiency is high, without moving-coil and the servo-actuated hidden danger that involves of wire, amplitude is accurately controlled, can realize below 5Hz, i.e. wideband from the quasistatic to the high frequency, heavy load, large displacement vibration device or equipment.
The present invention is achieved by the following technical solutions, the present invention includes: housing, solenoid, magnetic energy body and loading mechanism, wherein: two magnetic energy bodies are setting up and down in enclosure interior and be in contact with one another in the horizontal rotating shaft mode respectively, solenoid is arranged at enclosure interior and over against the second magnetic energy body, loading mechanism is movably set in the top of housing and contacts with a magnetic energy body.
Described housing comprises: base, rotating shaft support framework, magnetic circuit internal frame body and fuselage outer frame body, wherein: the fuselage outer frame body is fixedly connected with base, and rotating shaft support framework and magnetic circuit internal frame body are fixedly installed on respectively in the fuselage outer frame body and are positioned at the inside and outside of solenoid.
Described magnetic energy body is by being movably set in enclosure interior and forming with loading mechanism and contacted the first magnetic energy body of the second magnetic energy body and the second magnetic energy body of being fixedly installed on enclosure interior below respectively, wherein: the first magnetic energy body is cylindrical structural, and the second magnetic energy body is the direction polymorphic structure.
Described first time is provided with the Flexible Reset body between magnetic energy body and the enclosure interior.
Described solenoid is one or more os, specifically is positioned at housing and is arranged at the outside of the second magnetic energy body.
Described loading mechanism comprises: the objective table that from top to bottom is fixedly connected sequentially, structure sensor, displacement output panel and the displacement output body of rod, wherein: the displacement output body of rod contacts with the magnetic energy body with housing flexible connection and its lower end.
Described loading mechanism is provided with the axis of guide, and this axis of guide specifically is positioned at the lower surface of displacement output panel and is flexibly connected with housing, realizes guiding.
Shaking table initialization state of the present invention, before not passing into the electric magnetization signal, by the effect of elasticity recovery body, the magnetic energy body is responded the constraint of elastic body pressure in the horizontal direction, and this moment, magnetic pole was on the horizontal direction.During work, solenoid is switched on, because the electromagnetic field direction is vertical with initial magnetic energy body pole orientation, when electromagnetic intensity is enough, magnetic pole deflection will occur in the magnetic energy body, along with the length direction of magnetic pole deflection magnetic energy body also changes to vertical direction from horizontal direction, the magnetic energy body is to vertical direction deflection, thereby when overcoming the elasticity recovery constraining force, head on and push the displacement output body of rod when countershaft holds rotation and move up, and then push the upper test specimen with placement of displacement output panel and the final driving objective table of structure sensor and its and move up.This distance that moves is directly proportional with electromagnetic intensity or impressed current intensity, can be by applying the corresponding control of electric current, maximum displacement be direction abnormity magnetic energy body center to the distance on summit, pole orientation upper end with to the direction upper end summit vertical with pole orientation apart from difference.After the displacement output body of rod is by jack-up, cut off electric current or apply inverse current, the magnetic energy body will be under the recovery pressure effect of elasticity recovery body so, or elasticity recovery body recovery pressure and oppositely the electromagnetic force force action issue and turn until horizontal level, the displacement output body of rod and then objective table can fall after rise with test block on it like this.Like this, apparatus of the present invention can be along with applying forward and reverse variable-current in the solenoid, the process that the test block realization on the objective table once pumps with add electric current or outage to solenoid.Based on this, repeat the switching electric current or pass into exchange current to coil, shaking table so of the present invention will be realized up and down reciprocatingly vibration processes.The amplitude of this vibration and vibration frequency all can be done corresponding control by the power and the frequency that apply current signal.
Shaking table of the present invention, between objective table and displacement output panel, be provided with the pressure structure sensor with enough strength of joint, when objective table push to test part lifting meeting pulled back, thrust and pulling force that displacement output panel is delivered on the test block can be by structure sensor equivalent real-time sensings.So, shaking table of the present invention not only can be realized the shaking table effect, and be applied to the driving force on the test block in this vibration processes and drive acceleration or drive flat rate and can be detected in real time, thereby the final electromagnetic permanent magnet combined excited vibration platform of realizable force control type.
The present invention relates to the electromagnetic permanent magnet combined excited vibration of a kind of power control type system, formed with linear array formula, planar array formula or 3 D stereo array and in parallel or its solenoid of connecting by the electromagnetic permanent magnet combined excited vibration platform of above-mentioned several power control types.This system can be used for simulation realize on as bridge etc. large-scale the anti-vibration of grow " length " facility, the work of anti-external applied load experiment test arranged, be used for simulation and realize the anti-vibration such as impacts such as road surface, wave, earthquakes, the research of anti-external applied load experiment test on the vehicles, building or be used for the simulation realization external applied load shock and vibration of the vehicles, building three-dimensional and the external force resistance under the power effect, anti-vibration, anti-external applied load experiment test are studied.
Compared with prior art, the present invention has the following advantages:
1. realized that drive efficiency is high, and is energy-conservation based on the direct vibratory drive under electromagnetism and the effect of magnetic energy bluk recombination magnetic energy;
2, oscillating movement drives directly, and mechanism is simple, good rigidly, good reliability;
3, drive vibration frequency and can apply electric signal control by the outside fully, can realize that quasistatic arrives the wideband vibration of high frequency;
4, realize that easily large amplitude drives; Also easily realize small amplitude; Vibration displacement is accurately controlled;
5. flexible stress, strain size and precision can be controlled by the intensity that accurately applies magnetic field or electric current, and control is simple, convenient;
6, have structure sensing link, be applied to driving force on the measured piece, acceleration, displacement etc. in the vibratory drive process and can be implemented monitoring or convert and obtain, thus the convenient closed-loop control that realizes vibration-testing.
Description of drawings
Fig. 1 is structural representation of the present invention;
Wherein: (a) being the pressure-less state schematic diagram, (b) is the pressure state schematic diagram.
Fig. 2 is the electromagnetic permanent magnet combined excited vibration system schematic of embodiment power control type;
Wherein: (a) being linear array, (b) is planar array, (c) is solid array.
Embodiment
The below elaborates to embodiments of the invention, and the present embodiment is implemented under take technical solution of the present invention as prerequisite, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
As shown in Figure 1, the present embodiment comprises: housing 1, solenoid 2, magnetic energy body 3,4 and loading mechanism 5, wherein: two magnetic energy bodies 3,4 are setting up and down inner and be in contact with one another in housing 1 in the horizontal rotating shaft mode respectively, solenoid 2 is positioned at enclosure interior and over against the second magnetic energy body 4, loading mechanism 5 is movably set in the top of housing 1 and contacts with a magnetic energy body.
Described housing 1 comprises: base 6, rotating shaft support framework 7, magnetic circuit internal frame body 8 and fuselage outer frame body 9, wherein: fuselage outer frame body 9 is fixedly connected with base 6, and rotating shaft support framework 7 and magnetic circuit internal frame body 8 are fixedly installed on respectively in the fuselage outer frame body 9 and are positioned at the inside and outside of solenoid 2.
Described fuselage outer frame body 9 inside and magnetic circuit internal frame body 8 inside all are filled with heat eliminating medium 10;
Described magnetic energy body is inner and form with loading mechanism 5 and the second magnetic energy body 4 contacted the first magnetic energy bodies 3 and the second magnetic energy body 4 of being fixedly installed on housing 1 inner below respectively by being movably set in housing 1, wherein: the first magnetic energy body 3 is cylindrical structural, and the second magnetic energy body 4 is the elliptic cylinder structure.
Described first time is provided with back-moving spring 11 between magnetic energy body 3 and housing 1 inside.
Described solenoid 2 is one or more os, specifically is positioned at housing and is arranged at the outside of the second magnetic energy body 4, and heart position then is placed in one magnetic energy body 4 when solenoid 2 is an o; When being two above os, solenoid 2 then evenly is arranged at the outside of the second magnetic energy body 4.
Described loading mechanism 5 comprises: the objective table 12 that from top to bottom is fixedly connected sequentially, structure sensor 13, displacement output panel 14 and the displacement output body of rod 15, wherein: the displacement output body of rod 15 contacts with the magnetic energy body with housing 1 flexible connection and its lower end.
Be provided with linear bearing 16 between described displacement take-off lever and the housing 1.
Described structure sensor 13 is piezoelectric force transducer.
Described loading mechanism 5 is provided with the axis of guide 17, and this axis of guide 17 specifically is positioned at the lower surface of displacement output panel 14 and is flexibly connected with housing 1, realizes guiding.
Be provided with linear bearing 16 between the described axis of guide 17 and the housing 1.
This device initialization state, before not passing into the electric magnetization signal, be back-moving spring 11 effect by the Flexible Reset body, the magnetic energy body be permanent magnet and outsourcing base 6 thereof be reset elastic body be the constraint of back-moving spring 11 pressure in the horizontal direction, this moment, permanent magnet pole was on the horizontal direction.During work, to solenoid 2 energisings, because the electromagnetic field direction of its generation and initial permanent magnet pole perpendicular direction, when electromagnetic intensity is enough, magnetic pole deflection will occur in permanent magnet, along with the length direction of magnetic pole deflection permanent magnet also changes to vertical direction from horizontal direction, permanent magnet is to vertical direction deflection, thereby when overcoming back-moving spring 11 constraining forces, heading on countershaft forwards and pushes the displacement output body of rod 15 moving the time and move up, and then push displacement output panel 14 and structure sensor 13 final driving objective tables 12 and its upper test specimen with placement moves up, shown in the figure dotted line.
This distance that moves is directly proportional with electromagnetic intensity or impressed current intensity, can be by applying the corresponding control of electric current, maximum displacement be the second magnetic energy body be the direction abnormity elliptical cylinder-shape permanent magnet center to the distance on summit, pole orientation upper end and summit, end on the direction vertical with pole orientation apart from difference.After the displacement output body of rod 15 is by jack-up, cut off electric current or apply inverse current, permanent magnet will be under the recovery pressure effect of back-moving spring 11 so, or the recovery pressure of back-moving spring 11 and oppositely the electromagnetic force force action issue and turn until horizontal level, the displacement output body of rod 15 and then objective table 12 can fall after rise with test block on it like this.In the whole driving process, the movement of the displacement output body of rod 15 and the movement of displacement output panel 14 are all by the linear bearing 16 that is arranged on the fuselage outer frame body 9, and the axis of guide 17 and linear bearing 16 guiding, cause the driving oscillating movement more steady.In addition, the axis of guide 17 outsides between displacement output panel 14 and fuselage housing support body upper end cover are enclosed with rubber elastic body 18, the impact of 15 pairs of permanent magnets of displacement output body of rod when this can play 12 falling of buffering objective table on the one hand, another the convenient ability that can share the tested load of the displacement output body of rod 15 carryings makes the displacement output body of rod 15 can drive the test block of larger quality.In addition, in the shaking table course of work, but the phase transformation class heat eliminating mediums 10 such as gap filling paraffin in fuselage housing support body and magnetic circuit internal frame body 8, to stop solenoid 2 heatings.
Like this, according to above explanation, this device can be along with applying forward and reverse variable-current in the solenoid 2, the process that the test block realization on the objective table 12 once pumps with adding electric current or outage for solenoid 2.Based on this, repeat the switching electric current or pass into exchange current for solenoid 2, this device will be realized up and down reciprocatingly vibration processes so.The amplitude of this vibration and vibration frequency all can be done corresponding control by the power and the frequency that apply current signal.
Simultaneously, the shaking table of this device, between objective table 12 and displacement output panel 14, be provided with the pressure structure sensor 13 with enough strength of joint and be piezoelectric force transducer, when objective table 12 push to test part lifting meetings pulled back, thrust and pulling force that displacement output panel 14 is delivered on the test block can be by pressure transducer equivalent real-time sensings.So, the shaking table of this device not only can be realized the shaking table effect, and be applied to the driving force on the test block in this vibration processes and drive acceleration or driving frequency can be detected or obtain by conversion in real time, thereby the final electromagnetic permanent magnet combined excited vibration platform of realizable force control type.
Embodiment 2
As shown in Figure 2, the present embodiment passes through the electromagnetic permanent magnet combined excited vibration platform 19 of above-mentioned several power control types with the linear array formula, planar array formula or 3 D stereo array are arranged, encourage corresponding driven member or driven member array 20, and respectively independent control or and or its solenoid of connecting form the electromagnetic permanent magnet combined excited vibration of corresponding force control type system, this system can be used for simulation and realizes as bridge etc. is large-scale the anti-vibration of growing " length " facility being arranged, anti-external applied load experiment test work, being used for simulation realizes the vehicles, building such as road surface, wave, the anti-vibration of the impact such as earthquake, anti-external applied load experiment test is studied or is used for simulation and realizes the vehicles, the external applied load of building three-dimensional is impacted, external force resistance under vibration and the power effect, anti-vibration, anti-external applied load experiment test research.

Claims (10)

1. electromagnetic permanent magnet combined excited vibration platform of power control type, comprise: housing, solenoid, magnetic energy body and loading mechanism, it is characterized in that: two magnetic energy bodies are setting up and down in enclosure interior and be in contact with one another in the horizontal rotating shaft mode respectively, solenoid is positioned at enclosure interior and over against the second magnetic energy body, loading mechanism is movably set in the top of housing and contacts with a magnetic energy body.
2. the electromagnetic permanent magnet combined excited vibration platform of power control type according to claim 1, it is characterized in that, described housing comprises: base, rotating shaft support framework, magnetic circuit internal frame body and fuselage outer frame body, wherein: the fuselage outer frame body is fixedly connected with base, and rotating shaft support framework and magnetic circuit internal frame body are fixedly installed on respectively in the fuselage outer frame body and are positioned at the inside and outside of solenoid.
3. the electromagnetic permanent magnet combined excited vibration platform of power control type according to claim 1, it is characterized in that, described magnetic energy body is by being movably set in enclosure interior and forming with loading mechanism and contacted the first magnetic energy body of the second magnetic energy body and the second magnetic energy body of being fixedly installed on enclosure interior below respectively, wherein: the first magnetic energy body is cylindrical structural, and the second magnetic energy body is the direction polymorphic structure.
4. the electromagnetic permanent magnet combined excited vibration platform of power control type according to claim 3 is characterized in that, is provided with the Flexible Reset parts between described the first magnetic energy body and the enclosure interior.
5. the electromagnetic permanent magnet combined excited vibration platform of power control type according to claim 1 and 2 is characterized in that, described solenoid is one or more os, specifically is positioned at housing and is arranged at the outside of the second magnetic energy body.
6. the electromagnetic permanent magnet combined excited vibration platform of power control type according to claim 1, it is characterized in that, described loading mechanism comprises: the objective table that from top to bottom is fixedly connected sequentially, structure sensor, displacement output panel and the displacement output body of rod, wherein: the displacement output body of rod contacts with the magnetic energy body with housing flexible connection and its lower end.
7. the electromagnetic permanent magnet combined excited vibration platform of power control type according to claim 6 is characterized in that, is provided with linear bearing between described displacement take-off lever and the housing.
8. the electromagnetic permanent magnet combined excited vibration platform of power control type according to claim 1 is characterized in that, described loading mechanism is provided with the axis of guide, and this axis of guide specifically is positioned at the lower surface of displacement output panel and is flexibly connected with housing, realizes guiding.
9. the electromagnetic permanent magnet combined excited vibration platform of power control type according to claim 8 is characterized in that, is provided with linear bearing between the described axis of guide and the housing.
10. the electromagnetic permanent magnet combined excited vibration of power control type system is characterized in that being arranged with linear array formula, planar array formula or 3 D stereo array and in parallel or its solenoid of connecting forms by the electromagnetic permanent magnet combined excited vibration platform of several the above-mentioned described power control of arbitrary claim types.
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CN103084327B (en) * 2013-01-25 2014-11-05 西安交通大学 Non-contact vibration exciter with lower power consumption and adjustable exciting force directions and control method
CN103196667A (en) * 2013-04-01 2013-07-10 中国北方发动机研究所(天津) Electromagnetism energizing connecting rod fatigue test bed
CN103575494B (en) * 2013-11-19 2016-03-23 苏州东菱振动试验仪器有限公司 The magnetic circuit system of beam vibration platform and control method thereof
CN105806580B (en) * 2016-06-01 2018-07-13 吉林大学 Stiffness variable wideband resonance mechanism
CN107228621A (en) * 2017-06-08 2017-10-03 重庆腾毅兴精密电子有限公司 A kind of voice coil motor swing detecting device and its method
CN109781301B (en) * 2017-11-10 2021-05-18 技嘉科技股份有限公司 Detection device
CN109765065B (en) * 2019-03-04 2020-12-15 西南交通大学 Vertical electric suspension test bed

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CN1307433C (en) * 2004-11-29 2007-03-28 成都理工大学 Two-way and three-freedom spring seismic analog vibrating stand
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