CN110439964A - A kind of main passive control technology of thin-wall member vibration that piezoelectricity is compound with damping layer - Google Patents
A kind of main passive control technology of thin-wall member vibration that piezoelectricity is compound with damping layer Download PDFInfo
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- CN110439964A CN110439964A CN201910756298.1A CN201910756298A CN110439964A CN 110439964 A CN110439964 A CN 110439964A CN 201910756298 A CN201910756298 A CN 201910756298A CN 110439964 A CN110439964 A CN 110439964A
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- Prior art keywords
- thin
- mould component
- walled plate
- plate mould
- layer
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D33/00—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for
- B64D33/02—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for of combustion air intakes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
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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
- 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
- F16F15/04—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 elastic means
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/04—Devices damping pulsations or vibrations in fluids
- F16L55/041—Devices damping pulsations or vibrations in fluids specially adapted for preventing vibrations
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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
- F16F2230/00—Purpose; Design features
- F16F2230/18—Control arrangements
Abstract
A kind of main passive control technology of thin-wall member vibration that piezoelectricity is compound with damping layer, piezoceramics layer is connect with viscoelastic damping material, viscoelastic damping material is connect with thin-walled plate mould component; thin-walled plate mould component is connect with vibrating sensing with data acquisition module, and thin-walled plate mould component is connect with active control module；Piezoelectric acceleration transducer is connect with thin-walled plate mould component, and thin-walled plate mould component is connect with A/D conversion capture card, and A/D conversion capture card is connect with computer control unit；Active control hardware system is connected with active control software systems；Piezoceramics layer is connect with voltage input output card.The invention thin-walled plate mould component kinetic characteristics and the layout optimization of the main technology realization passively jointly controlled of vibration, visco-elastic damping material and piezoelectric ceramics composite construction, it is functional and multiple functional, it is stable, applied in the fixed support device technical field of aeroengine pipeline system.
Description
Technical field
The present invention is one of the thin-walled plate mould component vibrotechnique field for being related to aerospace equipment piezoelectricity and damping
The compound main passive control technology of thin-wall member vibration of layer, and in particular to a kind of piezoceramics layer and viscoelastic damping material are multiple
The thin-walled plate mould component vibration characteristics of conjunction and its main passive control application technology and system.
Background technique
Currently, thin-walled plate mould component is widely used in aerospace equipment because of its lighting and preferable force-bearing property,
Such as body structure of airplane intake siding, the Thin-Wall Outer Casing of engine, rocket or guided missile.But plate and shell structure effectively solves
Aerospace of having determined lighting requirement, while a series of new problems also are brought to the design of structure, manufacture and use, wherein
The vibration problem of flexible thin-walled plate shell class formation is very prominent.
Thin-walled plate mould component has the characteristics that span is big, rigidity is low, due to thin-walled plate mould component low order frequency very little, decaying
Item changes over time slowly, and significantly vibration wants perdurabgility long, can also reduce spacecraft precision, service life very when serious
To causing structure to be destroyed, the safety of spacecraft structure is threatened.Therefore, it conducts a research to thin-walled plate mould component vibration suppression and especially must
It wants.
The prior art is mostly focused on the damping mechanism of viscoplasticity constrained layer damping material class or the master of plate shell class structure
Dynamic control etc., and combine both, realize the technology that viscoplasticity constrained layer damping is combined with Vibration Active Control
It is less.
The patent No. 201210179603.3 discloses a kind of from preheating laser forming ZrO2-Al2O3Z composite ceramics thin-wall part
Preparation method, this patent is different from, and the piezoceramics layer and visco-elastic damping layer composite construction are used for actuation
Element is used for active vibration suppression.
Patent No. 201320608179.X discloses a kind of thin-walled stub column shell of the engine with vibrating effect, the patent
It is the effect of visco-elastic damping layer independent role.This patent is different from, the main passive control of the thin-wall member vibration
Technology, is the effect of piezoceramics layer and visco-elastic damping layer compound action, and the solar wing that embodiment is previously mentioned shakes with wideband
Dynamic feature；
Therefore, it is always anxious to develop a kind of main passive control technology of thin-wall member vibration that piezoelectricity is compound with damping layer
New issue to be solved.
Summary of the invention
The purpose of the present invention is to provide the compound thin-wall members of a kind of piezoelectricity and damping layer to vibrate main passive control technology,
In order to solve the Non-Linear Vibration of thin-walled plate mould component and low frequency Vibration, which is able to solve piezoceramics layer and viscoelastic
Property Damping material layer is compound, layout optimization problem is, it can be achieved that effective control to thin-walled plate mould component fixed frequency and wide frequency range vibration
System, can also realize the control of thin-walled plate mould component low-frequency vibration.
The object of the present invention is achieved like this: a kind of main passive control of the thin-wall member vibration that piezoelectricity is compound with damping layer
Technology, including piezoceramics layer, viscoelastic damping material, thin-walled plate mould component, vibrating sensing and data acquisition module, active
Control module, piezoceramics layer are connect with viscoelastic damping material, and viscoelastic damping material is connect with thin-walled plate mould component,
Thin-walled plate mould component is connect with vibrating sensing with data acquisition module, and thin-walled plate mould component is connect with active control module；It is described
Vibrating data collection module be made of piezoelectric acceleration transducer, A/D conversion capture card, computer control unit, piezoelectricity
Formula acceleration transducer is connect with thin-walled plate mould component, and thin-walled plate mould component is connect with A/D conversion capture card, A/D conversion acquisition
Card is connect with computer control unit；The active control module is by active control hardware system and active control software systems
Composition, active control hardware system are connected with active control software systems；The active control hardware system is by piezoelectric ceramics
Layer, piezoceramic transducer, voltage input output card, piezoceramics layer driving are formed with voltage amplifier, piezoceramics layer with
The connection of voltage input output card, voltage input output card are connect with piezoceramics layer driving with voltage amplifier, piezoceramics layer
Driving voltage amplifier is connect with piezoceramic transducer；The active control software systems are by signal filter module, letter
Number processing module, control algolithm module and overload protection and signal output module form, signal filter module and signal processing mould
Block connection, signal processing module are connect with control algolithm module, and control algolithm module and overload protection and signal output module connect
It connects；
The piezoceramic transducer is pasted onto thin-wall member surface, for picking up thin-wall member under vibrational state
Voltage signal is transferred to computer control unit by the voltage signal of voltage input output card and carries out reverse phase processing, after processing
Voltage signal be applied to piezoceramics layer after piezoceramics layer driving is amplified with voltage amplifier, realize to thin-walled structure
The actuation of part；The voltage signal that wherein A/D change data capture card picks up piezoceramic transducer carries out analog-to-digital conversion, through believing
Number filter module realizes that filtered signal can realize reverse phase and width through signal processing module to certain frequency-region signal bandpass filtering
Value scaling, then through control algolithm module, by treated, voltage signal is transmitted to actuator realization active control, overload protection
The overload protection of piezoelectric ceramic piece can be realized with signal output module；
Piezoceramics layer and viscoelastic damping material progress is compound together, and it is pasted onto thin-walled plate mould component surface
On, active force is generated by the regulating and controlling voltage of piezoceramics layer, the shear-deformable of viscoelastic damping material is initiatively adjusted, increases
The energy consumption of big viscoelastic damping material, realizes the rapid decay of thin-walled plate mould component vibration；Meanwhile piezoceramics layer generates
Active force by viscoelastic layer transmitting act on thin-walled plate mould component, the modality-specific rigidity of thin-walled plate mould component is increased
Strong or setting reduces the modality-specific resonance or Near resonance oscillating response of thin-walled plate mould component；It can be realized more to thin-walled plate mould component
Effective control of a harmonic vibration fixed frequency and the random vibration in wide frequency range；The acceleration transducer is pasted onto thin-walled plate
The surface of mould component, the real-time monitoring for thin-walled plate mould component vibration signal；Active control module by inputted vibration signal into
Row operation realizes control signal output by control algolithm, by voltage amplification and acts on piezoceramics layer, realize to thin-walled plate
The effective control for determining frequency and wideband vibration of mould component；
The surface density 0.464kg/m of the viscoelastic damping material2, tensile strength 37.2MPa, elasticity modulus
23.5GPa；Visco-elastic damping material fissipation factor is 0.025 within the scope of 25-400 DEG C, 0-2000Hz；Higher than similar viscoplasticity
Damping material 0.01 or so；The visco-elastic damping material realizes there is high damping characteristic in wider temperature range, resistance to
Temperature reaches -80~350 DEG C, and damping capacity stabilization is not degenerated in -80~350 DEG C of ambient temperature ranges；With corrosion-resistant, oil resistant
Outstanding feature；
The piezoelectric strain constant d of the piezoelectric ceramic piece31、d33、d15Respectively 186 × 10-12C/N、420×10-12C/
N、660×10-12C/N；Elastic constantRespectively 15m2/N、5.3m2/N、25m2/N；Relative dielectric constantIt is 2200；
The piezoceramics layer is evenly distributed on thin-walled plate mould component root with a thickness of 1mm, piezoceramics layer deformation
The active force of generation can be also transmitted on thin-walled plate mould component by viscoelastic layer, realize the master to the rigidity of thin-walled plate mould component
Dynamic control realizes effective vibration damping in the fixed frequency of thin-walled plate mould component and wide frequency range under different exiting forms；Described
Piezoceramics layer and viscoelastic damping material progress are compound, are pasted using adhesive；The multilayered structure being combined is i.e.
Execution structure is passively controlled for the master of thin-walled plate mould component vibration；
The paste position of the piezoceramics layer and viscoelastic damping material, by the vibration characteristics of thin-walled plate mould component
It determines, should be pasted in Modal Stress or the maximum region of response dynamic stress；With before the weighting processing of thin-walled plate mould component four
Rank modal loss factor maximum is turned to optimization aim, is no more than 50% with the surface area accounting of viscoelastic damping material for constraint
Condition carries out the optimization of the layout and shape and material thickness of visco-elastic damping layer paste position and region；Piezoelectricity pottery
Enamel coating driving is used to amplify the voltage output signal of voltage input output card with voltage amplifier, driving power voltage amplitude
Being worth amplification factor is 15 times, and the full amplitude bandwidth of zero load is 1000Hz；
The active control software systems increase signal filter module, can be effectively reduced transducing signal interference；Electricity
Sampling configuration selection hardware timing single-point sampling is pressed, the sampling of hardware timing single-point can be realized continuous sampling or generate sampling,
Using non-cushioned hardware timing sampling, the time delay due to caused by data buffering can be eliminated；It is defeated for guarantee data simultaneously
Enter synchronous with data output, clock and triggering can be shared in multiple tasks or equipment room, guarantee that data input and data output are same
Step；The active control software is zoomed in and out by peak-to-peak value of the amplitude coefficient of diminution to output waveform, realizes different voltages
Output.
The function of being realized after the structure of the invention for being characterized by it and all parts connection.
A kind of flexible collar based on visco-elasticity polyurethane layer compared with prior art, has the following beneficial effects:
The present invention has thin-walled plate mould component kinetic characteristics and the main technology realization passively jointly controlled of vibration, viscoelastic
Property the damping material and layout optimization of piezoelectric ceramics composite construction, piezoelectric material quantity, control voltage and thin-walled plate mould component
Suffered exciting amplitude is functional and multiple functional to functions such as the evaluations of vibration control effect, stable, will widely
Applied in the fixed support device technical field of aeroengine pipeline system.
Detailed description of the invention
The following describes the present invention in detail with reference to the accompanying drawings and embodiments.
Fig. 1 is the principle of the present invention block diagram.
Fig. 2 is partial structure diagram of the invention.
Specific embodiment
Referring to attached drawing, a kind of main passive control technology of thin-wall member vibration that piezoelectricity is compound with damping layer, including piezoelectricity pottery
Enamel coating 1, viscoelastic damping material 2, thin-walled plate mould component 3, vibrating sensing and data acquisition module 4, active control module 5,
Piezoceramics layer 1 is connect with viscoelastic damping material 2, and viscoelastic damping material 2 is connect with thin-walled plate mould component 3, thin-walled
Plate mould component 3 is connect with vibrating sensing with data acquisition module 4, and thin-walled plate mould component 3 is connect with active control module 5；It is described
Vibrating data collection module 4 be made of piezoelectric acceleration transducer 6, A/D conversion capture card 7, computer control unit 8,
Piezoelectric acceleration transducer 6 is connect with thin-walled plate mould component 3, and thin-walled plate mould component 3 is connect with A/D conversion capture card 7, A/D
Conversion capture card 7 is connect with computer control unit 8；The active control module 5 is by active control hardware system 9 and actively
It controls software systems 10 to form, active control hardware system 9 and active control software systems 10 connect；The active control is hard
Part system 9 is pressed by piezoceramics layer 1, piezoceramic transducer 17, voltage input output card 11, piezoceramics layer driving electricity consumption
Big device 12 forms, and piezoceramics layer 1 is connect with voltage input output card 11, and voltage input output card 11 and piezoceramics layer drive
It is connected with voltage amplifier 12, piezoceramics layer driving voltage amplifier 12 is connect with piezoceramic transducer 17；Described
Active control software systems 10 by signal filter module 13, signal processing module 14, control algolithm module 15 and overload protection with
Signal output module 16 forms, and signal filter module 13 is connect with signal processing module 14, and signal processing module 14 and control are calculated
Method module 15 connects, and control algolithm module 15 is connect with overload protection with signal output module 16.
The piezoceramic transducer 17 is pasted onto thin-wall member surface, for picking up thin-wall member under vibrational state
Voltage signal, by the voltage signal of voltage input output card 11 be transferred to computer control unit 8 carry out reverse phase processing, place
Voltage signal after reason is applied to piezoceramics layer 1 after piezoceramics layer driving voltage amplifier 12 amplifies, and realizes
Actuation to thin-wall member；The voltage signal that wherein A/D change data capture card 7 picks up piezoceramic transducer 17 carries out mould
Number conversion realizes that filtered signal is through signal processing module to certain frequency-region signal bandpass filtering through signal filter module 13
14 can realize reverse phase and amplitude scaling, and then through control algolithm module 15, by treated, voltage signal is transmitted to actuator realization
Active control, overload protection and signal output module 16 can realize the overload protection of piezoelectric ceramic piece.
By piezoceramics layer 1 and viscoelastic damping material 2 carry out it is compound together, and be pasted onto 3 table of thin-walled plate mould component
On face, active force is generated by the regulating and controlling voltage of piezoceramics layer 1, the shearing for initiatively adjusting viscoelastic damping material 2 becomes
Shape increases the energy consumption of viscoelastic damping material 2, realizes the rapid decay that thin-walled plate mould component 3 vibrates；Meanwhile piezoelectricity is made pottery
The active force that enamel coating 1 generates acts on thin-walled plate mould component 3 by the transmitting of viscoelastic layer 2, to the specific mould of thin-walled plate mould component 3
State rigidity is enhanced or is set up, and the modality-specific resonance or Near resonance oscillating response of thin-walled plate mould component 3 are reduced；It can be realized to thin
Effective control of a harmonic vibration of siding mould component more than 3 fixed frequency and the random vibration in wide frequency range；The acceleration sensing
Device 6 is pasted onto the surface of thin-walled plate mould component 3, the real-time monitoring for 3 vibration signal of thin-walled plate mould component；Active control module
Inputted vibration signal is carried out operation by 5, is realized control signal output by control algolithm, by voltage amplification and is acted on piezoelectricity pottery
Enamel coating realizes the effective control for determining frequency and wideband vibration to thin-walled plate mould component 3.
The surface density 0.464kg/m of the viscoelastic damping material 22, tensile strength 37.2MPa, elasticity modulus
23.5GPa；Visco-elastic damping material fissipation factor is 0.025 within the scope of 25-400 DEG C, 0~2000Hz；Higher than similar viscoelastic
Property damping material 0.01 or so；The visco-elastic damping material, realize has high damping characteristic in wider temperature range,
Heatproof reaches -80~350 DEG C, and damping capacity stabilization is not degenerated in -80~350 DEG C of ambient temperature ranges；With corrosion-resistant, resistance to
Oily outstanding feature.
The piezoelectric strain constant d of the piezoelectric ceramic piece 131、d33、d15Respectively 186 × 10-12C/N、420×10- 12C/N、660×10-12C/N；Elastic constantRespectively 15m2/N、5.3m2/N、25m2/N；Relative dielectric constantIt is 2200.
The piezoceramics layer 1 is evenly distributed on 3 root of thin-walled plate mould component, piezoceramics layer 1 with a thickness of 1mm
The active force that deformation generates can be also transmitted on thin-walled plate mould component 3 by viscoelastic layer 2, be realized to thin-walled plate mould component 3
The active control of rigidity realizes effectively subtracting in the fixed frequency of thin-walled plate mould component 3 and wide frequency range under different exiting forms
Vibration；The piezoceramics layer 1 and viscoelastic damping material 2 carries out compound, is pasted using adhesive；It is combined
Multilayered structure is that the master of the vibration of thin-walled plate mould component 3 passively controls execution structure.
The paste position of the piezoceramics layer 1 and viscoelastic damping material 2, by the vibration of thin-walled plate mould component 3
Characteristic determines, should paste in Modal Stress or the maximum region of response dynamic stress；With the weighting processing of thin-walled plate mould component
Preceding quadravalence modal loss factor maximum is turned to optimization aim, is no more than 50% with the surface area accounting of viscoelastic damping material
Constraint condition carries out the optimization of the layout and shape and material thickness of visco-elastic damping layer paste position and region；Pressure
The driving of electroceramics layer is used to put the voltage output signal (0-10V) of voltage input output card 11 with voltage amplifier 12
Greatly, driving power voltage magnitude amplification factor is 15 times, and the full amplitude bandwidth of zero load is 1000Hz.
The active control software systems 10 increase signal filter module 13, and it is dry to can be effectively reduced transducing signal
It disturbs；The sampling of voltage sample Mode selection hardware timing single-point, the sampling of hardware timing single-point can be realized continuous sampling or generation
Sampling, using non-cushioned hardware timing sampling, can eliminate the time delay due to caused by data buffering；It is simultaneously guarantee number
It is synchronous with data output according to inputting, clock and triggering can be shared in multiple tasks or equipment room, guarantee that data input is defeated with data
It synchronizes out；The active control software is zoomed in and out by peak-to-peak value of the amplitude coefficient of diminution to output waveform, is realized different
The output of voltage.
Embodiment one: a kind of piezoelectricity and the compound main passive control technology of thin-wall member vibration of damping layer are in hydraulic air pipe
Application in the vibration damping of road
A kind of piezoelectricity and the compound main passive control technology of thin-wall member vibration of damping layer are in hydraulic air pipeline vibration damping
Application.In application, piezoelectric ceramics and viscoelastic material are pasted on pipeline, the defeated of voltage is controlled by adjusting controller
Out, the inhibition of hydraulic air pipeline target fixed frequency and wideband vibration is realized.
Pipeline vibration problem is the significant problem faced required for improving hydraulic plumbing system stability and reliability.It is hydraulic
The vibrational excitation form that pipe-line system is born mainly has: the vibrational excitation of executive item, the exported fluid of hydraulic pump in hydraulic system
Impulse excitation and the elements frequent movement such as hydraulic valve caused by pulsatile impact.Fluid pressure line is under above-mentioned exiting form, meeting
The forced vibration for causing pipeline can make pipeline generate resonance, lead to pipeline when modal frequency of the driving frequency close to pipeline
Damage, causes pipe-line system failure.Piezoelectric ceramics and viscoelastic material are pasted onto pipeline outer surface, pass through adjusting controller control
Effective inhibition of hydraulic air pipeline vibration is realized in the output of voltage processed.
Test result shows: under different exiting forms, a kind of piezoceramics layer and visco-elastic damping material invented
The compound main passive control technology of thin-walled plate mould component vibration of layer can play preferable effectiveness in vibration suppression, pipeline vibration acceleration
Amplitude fall highest can reach 40% or more, and paste damping structure relative to centre, and pasting in root can rise
To relatively better effectiveness in vibration suppression.Different structural parameters, control parameter and excitation amplitude are analyzed to the shadow of vibration control
It rings.The result shows that: under the conditions of certain excitation, to increase effectiveness in vibration suppression, the control electricity of piezoceramics layer can be properly increased
It presses, increase the quantity of piezoelectric material and the paste position of piezoceramics layer and viscoelastic layer is reasonably optimized.
Embodiment two: a kind of piezoelectricity and the compound main passive control technology of thin-wall member vibration of damping layer are in the spacecraft sun
Application in wing vibration damping
A kind of piezoelectricity and the compound main passive control technology of thin-wall member vibration of damping layer are in spacecraft solar wing vibration damping
Application.In application, piezoelectric ceramics and viscoelastic material are pasted onto solar wing thin sheet surface, electricity is controlled by adjusting controller
The inhibition of solar wing thin-plate element low-frequency vibration is realized in the output of pressure.
The development trend of all kinds of spacecraft enlargements, lighting and Low rigidity, which designs its structure and is safely operated, to be proposed
Requirements at the higher level, large scale structure can increase the function of space structure, and such as bigger solar wing windsurfing can provide for space structure
The more sufficient energy, but this also brings a series of new problems to the design of structure, manufacture and use simultaneously, it is medium-and-large-sized
The vibration suppression problem of flexible structure is very prominent.Solar wing has the characteristics that span is big, rigidity is low, due to solar wing low order frequency
Rate very little, attenuation term changes over time slowly, when being run in space, once the effect by certain exciting force, significantly
Vibration will continue for a long time.This not only will affect the work of space structure, as posture stabilization and orientation accuracy the problems such as, sternly
Spacecraft service life can be also reduced when weight and even results in structure destruction, threaten the safety of spacecraft structure.By piezoelectric ceramics with
Viscoelastic material is pasted onto solar wing root, and the output of voltage is controlled by adjusting controller, realizes solar wing low-frequency vibration
Inhibit.
Test result shows: in certain oscillating region, a kind of piezoceramics layer and viscoelastic damping material invented
The compound main passive control technology of thin-walled plate mould component vibration of the bed of material is significant to solar wing vibration suppressioning effect, and effectiveness in vibration suppression reaches
30% or more.
Claims (8)
1. a kind of piezoelectricity thin-wall member vibration main passive control technology compound with damping layer, including piezoceramics layer, viscoplasticity
Damping material layer, thin-walled plate mould component, vibrating sensing and data acquisition module, active control module, it is characterised in that: piezoelectricity pottery
Enamel coating is connect with viscoelastic damping material, and viscoelastic damping material is connect with thin-walled plate mould component, thin-walled plate mould component with
Vibrating sensing is connect with data acquisition module, and thin-walled plate mould component is connect with active control module；The vibrating data collection
Module is made of piezoelectric acceleration transducer, A/D conversion capture card, computer control unit, piezoelectric acceleration transducer
It is connect with thin-walled plate mould component, thin-walled plate mould component is connect with A/D conversion capture card, and A/D converts capture card and computer controls
Unit connection；The active control module is made of active control hardware system and active control software systems, active control
Hardware system is connected with active control software systems；The active control hardware system is passed by piezoceramics layer, piezoelectric ceramics
Sensor, voltage input output card, piezoceramics layer driving are formed with voltage amplifier, piezoceramics layer and voltage input output card
Connection, voltage input output card are connect with piezoceramics layer driving with voltage amplifier, and voltage amplification is used in piezoceramics layer driving
Device is connect with piezoceramic transducer；The active control software systems are by signal filter module, signal processing module, control
Algoritic module and overload protection and signal output module form, and signal filter module is connect with signal processing module, signal processing
Module is connect with control algolithm module, and control algolithm module is connect with overload protection with signal output module.
2. a kind of piezoelectricity according to claim 1 thin-wall member vibration main passive control technology compound with damping layer,
Be characterized in that: the piezoceramic transducer is pasted onto thin-wall member surface, for picking up thin-wall member under vibrational state
Voltage signal, by the voltage signal of voltage input output card be transferred to computer control unit carry out reverse phase processing, processing
Voltage signal afterwards is applied to piezoceramics layer after piezoceramics layer driving is amplified with voltage amplifier, realizes to thin-walled
The actuation of component；The voltage signal that wherein A/D change data capture card picks up piezoceramic transducer carries out analog-to-digital conversion, warp
Signal filter module realizes to certain frequency-region signal bandpass filtering, filtered signal through signal processing module can realize reverse phase and
Amplitude scaling, then through control algolithm module, by treated, voltage signal is transmitted to actuator realization active control, and overload is protected
Shield and signal output module can realize the overload protection of piezoelectric ceramic piece.
3. a kind of piezoelectricity according to claim 1 thin-wall member vibration main passive control technology compound with damping layer,
It is characterized in that: piezoceramics layer and viscoelastic damping material progress is compound together, and it is pasted onto thin-walled plate mould component surface
On, active force is generated by the regulating and controlling voltage of piezoceramics layer, the shear-deformable of viscoelastic damping material is initiatively adjusted, increases
The energy consumption of big viscoelastic damping material, realizes the rapid decay of thin-walled plate mould component vibration；Meanwhile piezoceramics layer generates
Active force by viscoelastic layer transmitting act on thin-walled plate mould component, the modality-specific rigidity of thin-walled plate mould component is increased
Strong or setting reduces the modality-specific resonance or Near resonance oscillating response of thin-walled plate mould component；It can be realized more to thin-walled plate mould component
Effective control of a harmonic vibration fixed frequency and the random vibration in wide frequency range；The acceleration transducer is pasted onto thin-walled plate
The surface of mould component, the real-time monitoring for thin-walled plate mould component vibration signal；Active control module by inputted vibration signal into
Row operation realizes control signal output by control algolithm, by voltage amplification and acts on piezoceramics layer, realize to thin-walled plate
The effective control for determining frequency and wideband vibration of mould component.
4. a kind of piezoelectricity according to claim 1 thin-wall member vibration main passive control technology compound with damping layer,
It is characterized in that: the surface density 0.464kg/m of the viscoelastic damping material2, tensile strength 37.2MPa, elasticity modulus
23.5GPa；Visco-elastic damping material fissipation factor is 0.025 within the scope of 25-400 DEG C, 0-2000Hz；Higher than similar viscoplasticity
Damping material 0.01 or so；The visco-elastic damping material realizes there is high damping characteristic in wider temperature range, resistance to
Temperature reaches -80~350 DEG C, and damping capacity stabilization is not degenerated in -80~350 DEG C of ambient temperature ranges；With corrosion-resistant, oil resistant
Outstanding feature.
5. a kind of piezoelectricity according to claim 1 thin-wall member vibration main passive control technology compound with damping layer,
It is characterized in that: the piezoelectric strain constant d of the piezoelectric ceramic piece31、d33、d15Respectively 186 × 10-12C/N、420×10- 12C/N、660×10-12C/N；Elastic constantRespectively 15m2/N、5.3m2/N、25m2/N；Relative dielectric constantIt is 2200.
6. a kind of piezoelectricity according to claim 1 thin-wall member vibration main passive control technology compound with damping layer,
Be characterized in that: the piezoceramics layer is evenly distributed on thin-walled plate mould component root with a thickness of 1mm, and piezoceramics layer becomes
The active force that shape generates can be also transmitted on thin-walled plate mould component by viscoelastic layer, be realized to the rigidity of thin-walled plate mould component
Active control realizes effective vibration damping in the fixed frequency of thin-walled plate mould component and wide frequency range under different exiting forms；It is described
Piezoceramics layer and viscoelastic damping material carry out it is compound, pasted using adhesive；The multilayered structure being combined
The master of as thin-walled plate mould component vibration, which passively controls, executes structure.
7. a kind of piezoelectricity according to claim 1 thin-wall member vibration main passive control technology compound with damping layer,
It is characterized in that: the paste position of the piezoceramics layer and viscoelastic damping material, it is special by the vibration of thin-walled plate mould component
Property determine, should be pasted in Modal Stress or the maximum region of response dynamic stress；Before the weighting processing of thin-walled plate mould component
It is about that quadravalence modal loss factor maximum, which is turned to optimization aim, is no more than 50% with the surface area accounting of viscoelastic damping material,
Beam condition carries out the optimization of the layout and shape and material thickness of visco-elastic damping layer paste position and region；Piezoelectricity
Ceramic layer driving is used to amplify the voltage output signal of voltage input output card with voltage amplifier, driving power voltage
Amplitude amplification factor is 15 times, and the full amplitude bandwidth of zero load is 1000Hz.
8. a kind of piezoelectricity according to claim 1 thin-wall member vibration main passive control technology compound with damping layer,
Be characterized in that: the active control software systems increase signal filter module, can be effectively reduced transducing signal interference；Electricity
Sampling configuration selection hardware timing single-point sampling is pressed, the sampling of hardware timing single-point can be realized continuous sampling or generate sampling,
Using non-cushioned hardware timing sampling, the time delay due to caused by data buffering can be eliminated；It is defeated for guarantee data simultaneously
Enter synchronous with data output, clock and triggering can be shared in multiple tasks or equipment room, guarantee that data input and data output are same
Step；The active control software is zoomed in and out by peak-to-peak value of the amplitude coefficient of diminution to output waveform, realizes different voltages
Output.
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