CN108915546A - It is a kind of to lead the noise reduction glass plate and its active denoising method passively combined - Google Patents
It is a kind of to lead the noise reduction glass plate and its active denoising method passively combined Download PDFInfo
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- CN108915546A CN108915546A CN201810932919.2A CN201810932919A CN108915546A CN 108915546 A CN108915546 A CN 108915546A CN 201810932919 A CN201810932919 A CN 201810932919A CN 108915546 A CN108915546 A CN 108915546A
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B5/00—Doors, windows, or like closures for special purposes; Border constructions therefor
- E06B5/20—Doors, windows, or like closures for special purposes; Border constructions therefor for insulation against noise
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Abstract
The present invention discloses a kind of noise reduction glass plate led and passively combined, including：First glass plate, is vertically arranged；Active noise reduction device shell is adsorbed on the inside of first glass plate, and center, to being cylindrical structure far from first glass plate side protrusion, quadrangle is provided with support arm；Sub-loudspeaker is arranged on the support arm, and opening direction is directed away from first glass plate side；Vibrating sensor is arranged between first glass plate and active noise reduction device shell, and two sides are contacted with first glass plate and active noise reduction device shell respectively；Processor is arranged in the cylindrical structure, issues counteracting noise for receiving the detection data of the vibrating sensor and controlling the sub-loudspeaker.The present invention also provides a kind of active denoising methods to determine the defeated counteracting noise frequency of sub-loudspeaker based on fuzzy control method according to the vibration frequency and Oscillation Amplitude of the first glass plate, improves noise reduction effect.
Description
Technical field
The present invention relates to active noise reduction techniques fields, and more particularly, the present invention relates to a kind of noise reductions led and passively combined
Glass plate and its active denoising method.
Background technique
As social productive forces develop and the urbanization process that carries out simultaneously, noise caused by urban transportation, so that position
Building house especially at the front, apartment, hotel, office building in airport, railway or highway side etc., and those market,
Building near factory, downtown area, throughout the year by the hardship of noise invasion.
In modern building, the sound insulation of wall is generally attained by the requirement of sound insulation and noise reducing.Indoor noise is main
It is incoming from the relatively thin place such as door, window.Therefore, if we improve the noise reduction water in the relatively thin place such as door, window
It is flat, then being passed to indoor noise will greatly reduce.
The present invention provides a kind of novel noise reduction glass-plate structure, the side combined using active noise reduction with passive noise reduction
Formula, passive noise reduction mainly handle the high frequency section of noise, and the low-frequency noise ineffective for passive noise reduction process is using actively
Noise reduction technology makes up, and realizes the noise reduction in more broadband, obtains better noise reduction effect.
Summary of the invention
It is an object of the invention to designed and developed it is a kind of lead the noise reduction glass plate passively combined, the first glass can be acquired
The vibration frequency of glass plate, and the identical counteracting noise of opposite in phase frequency is released, further decrease noise.
Another object of the present invention is to have designed and developed a kind of active noise reduction side of noise reduction glass plate led and passively combined
Method determines that sub-loudspeaker is defeated and supports based on fuzzy control method according to the vibration frequency and Oscillation Amplitude of the first glass plate
De-noising acoustic frequency improves noise reduction effect.
Technical solution provided by the invention is：
It is a kind of to lead the noise reduction glass plate passively combined, including：
First glass plate, is vertically arranged；
Active noise reduction device shell is adsorbed on the inside of first glass plate, and center is to far from first glass plate
Side protrusion is cylindrical structure, and quadrangle is provided with support arm；
Sub-loudspeaker is arranged on the support arm, and opening direction is directed away from first glass plate side；
Vibrating sensor, be arranged between first glass plate and active noise reduction device shell, and two sides respectively with institute
State the first glass plate and the contact of active noise reduction device shell；
Processor is arranged in the cylindrical structure, for receiving detection data and the control of the vibrating sensor
It makes the sub-loudspeaker and issues counteracting noise.
Preferably, further include：
Second glass plate is arranged on the outside of first glass plate, and lower part is obliquely installed outward；
Wherein, the thickness of first glass plate is greater than second hyaline thickness.
Preferably, the processor includes：
Processing module is arranged in the cylindrical structure, and is arranged close to first glass plate；
Error microphone is arranged far from the cylindrical structure end face center of first glass plate；
Battery is arranged in the cylindrical structure, and be located at the processing module and the error microphone it
Between.
Preferably, further include：
Sucker is arranged between first glass plate and the support arm, is used for the active noise reduction device shell
It is adsorbed on first glass plate；
Frame, be provided at circumferentially spaced it is fluted, for fixing first glass plate and second glass plate；
Sealing strip is arranged in the groove, for sealing first glass plate and frame and described second respectively
Glass plate and frame；
Bloop is arranged between first glass plate and the second glass plate, and is adsorbed on the frame.
Preferably, the vibrating sensor is arranged at the active noise reduction device casing center.
Preferably, first glass plate with a thickness of 6~8mm, plate as second glass with a thickness of 2~3mm,
The spacing of first glass plate and second glass plate is 40~50mm.
Preferably, the width of the bloop is 10~30mm, the error microphone and first glass plate
Distance is 20~30mm.
A kind of active denoising method for leading the noise reduction glass plate passively combined, including fuzzy controller：
By the vibration frequency H of the first glass plategFuzzy controller is inputted with Oscillation Amplitude A, the in the fuzzy controller
The vibration frequency H of one glass plategIt is 7 grades with Oscillation Amplitude A points；
Fuzzy controller exports the counteracting noise frequency H that sub-loudspeaker issuess, export and be divided into 7 grades；
The vibration frequency H of first glass plategFuzzy domain be [1,2.5], quantizing factor 400；Described
The fuzzy domain of the Oscillation Amplitude A of one glass plate is [0,1], and the quantification factor is 0.05；What output sub-loudspeaker issued supports
De-noising acoustic frequency HsFuzzy domain be [1,2.5], quantizing factor 400；
The fuzzy set output and input is { NB, NM, NS, 0, PS, PM, PB }.
It preferably, further include fuzzy controller：
Ecotopia noise frequency after inputting the noise cancellation of i-th of noise reduction processWith the environment after noise cancellation
Noise frequency HsiDeviation e, deviation variation rate ec, export the proportionality coefficient, proportion integral modulus and differential coefficient of PID, ratio
Coefficient, proportion integral modulus and differential coefficient input PID controller carry out offsetting noise frequency HsError compensation control.
Preferably,
Ecotopia noise frequency after the noise cancellationWith the ambient noise frequency H after noise cancellationsiDeviation
The fuzzy domain of e is [- 1,1], and the quantification factor is 50；The fuzzy domain of the deviation variation rate ec is [- 3,3], quantification
The factor is 10；
The fuzzy domain of the proportionality coefficient of the output PID is [- 1,1], and the quantification factor is 0.1；Proportional integration system
Several fuzzy domains is [- 1,1], and the quantification factor is 0.1；The fuzzy domain of differential coefficient be [- 1,1], quantification because
Son is 0.0001；
The deviation e and deviation variation rate ec points are 7 grades；Proportionality coefficient, the proportion integral modulus of the output PID
It is divided into 7 grades with differential coefficient；
The fuzzy set of the fuzzy controller output and input is { NB, NM, NS, 0, PS, PM, PB }.
Beneficial effect of the present invention：
1, the technical advantages of the present invention are that effectively having widened the frequency band of noise reduction simultaneously using active noise reduction and passive noise reduction
Range；Noise source is obtained using non-acoustic original part and directly avoids " acoustic feedback " problem；By multiple bandpass filters by wideband
It is the narrow band signal of multiple equal equibands with error noise signal decomposition, and controlled simultaneously each narrow band signal, effectively
Improve the effect to wideband noise noise reduction；The basic structure of glass plate is innovatively devised, which uses high-performance
Material more effectively reduces the transmitting of noise, and the non-parallel configuration of glass plate greatly reduces the incoming of noise.The present invention can
More effectively weaken noise to be passed to indoor, provides more comfortable environment for people's lives, study and work.
2, the active denoising method for the noise reduction glass plate that master provided by the invention passively combines is based on fuzzy control method root
According to the vibration frequency and Oscillation Amplitude of the first glass plate, the defeated counteracting noise frequency H of sub-loudspeaker is determineds, improve noise reduction
Effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the noise reduction windowpane that master of the present invention passively combines.
Fig. 2 is the front view of the active noise reduction system for the noise reduction windowpane that master of the present invention passively combines.
Fig. 3 is multichannel active noise reduction control system figure of the present invention.
Fig. 4 is the control schematic diagram of fuzzy controller and fuzzy controller of the present invention.
Fig. 5 is the vibration frequency H of the first glass plate of input of fuzzy controller of the present inventiongSubordinating degree function
Figure.
Fig. 6 is the subordinating degree function figure of the Oscillation Amplitude A of the first glass plate of input of fuzzy controller of the present invention.
Fig. 7 is the counteracting noise frequency H that the output sub-loudspeaker of fuzzy controller of the present invention issuessBe subordinate to
Spend functional arrangement.
Fig. 8 is the subordinating degree function figure of the input deviation e of fuzzy controller of the present invention.
Fig. 9 is the subordinating degree function figure of the input deviation change rate ec of fuzzy controller of the present invention.
Figure 10 is the export ratio COEFFICIENT K of fuzzy controller of the present inventionpSubordinating degree function figure.
Figure 11 is the export ratio integral coefficient K of fuzzy controller of the present inventioniSubordinating degree function figure.
Figure 12 is the output differential coefficient K of fuzzy controller of the present inventiondSubordinating degree function figure.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
As shown in Figure 1, 2, the present invention provides a kind of noise reduction glass plate led and passively combined comprising active noise reduction system and
Passive noise reduction system, the active noise reduction system include：First glass plate 100, is vertically arranged；Active noise reduction device shell 110,
It is adsorbed on 100 inside of the first glass plate, and center is to far from 100 side of the first glass plate protrusion and in cylindrical body
Structure 120, four corners are provided with support arm 130, and sub-loudspeaker 140, i.e., 4 secondary loudspeakings are provided on support arm 130
Device 140, opening direction are directed away from 100 side of the first glass plate, identical with first glass plate 100 for generating
The counteracting noise of vibration frequency and opposite in phase, to reduce noise.In first glass plate 100 and active noise reduction device shell
Vibrating sensor 150 is provided between 110, two sides are contacted with the first glass plate 100 and active noise reduction device shell 110 respectively,
It is preferred that vibrating sensor 150 is arranged at the center of active noise reduction device shell 110.It is arranged in the cylindrical structure 120
There is processor, issues counteracting noise for receiving the detection data of vibrating sensor 150 and controlling the sub-loudspeaker 140.
The processor includes：DSP processing module 160 is arranged in the cylindrical structure 120, and close to described the
The setting of one glass plate 100；Error microphone 170 is arranged far from the cylindrical structure of first glass plate 100
120 end face centers, i.e. error microphone 170 are located on active noise reduction device shell 110 centered cylinder protrusion 120 from the first glass plate
100 farthest, the error microphone 170 are 20~30mm at a distance from first glass plate 100, are used for acquisition noise
Ambient noise frequency after counteracting；Battery 180 is arranged in the cylindrical structure 120, and is located at the DSP and handles
It between module 160 and error microphone 140, is separated, is used by plastic plate between the battery 180 and DSP processing module 160
It powers in for the active noise reduction system.
Vibrating sensor 150 and error acquisition microphone 170 are signal input module, and vibrating sensor 150 is mainly used for
Noise after acquisition decaying causes the vibration signal (including vibration frequency and Oscillation Amplitude) of the first glass plate 100 to be input to DSP
Processing module, error acquire the environmental sound signal (i.e. ambient sound frequency) after microphone 170 is offset for acquisition noise simultaneously
DSP processing module is input to update weight；Input signal is carried out processing and will generated corresponding defeated by the DSP processing module
Signal passes to loudspeaker sound module out, as shown in Figure 3；The sound module of the sub-loudspeaker 140 include it is multiple towards
Indoor sub-loudspeaker is mainly used for issuing and offsets audio signal.
The novel double-layer glazing structure of the passive noise reduction system selects the glass plate of two pieces of different-thickness, including
One glass plate 100 and the second glass plate 200, first glass plate 100 are vertically arranged, and the setting of the second glass plate 200 exists
First glass plate, 10 outside, and lower part is inclined outwardly setting.Certainly further include glass frame 300, be provided at circumferentially spaced recessed
Slot 310 is provided in the groove 310 for accommodating fixed first glass plate 100 and second glass plate 200
Sealing strip 320, for sealing first glass plate 100 and frame 310 and second glass plate 200 and frame 310 respectively.
Second glass plate 200 with a thickness of 2mm~3mm, the first glass plate 100 with a thickness of 6mm~8mm, select different
The glass plate of thickness, the frequency for the coincidence effect that can be staggered weaken influence of the coincidence effect to noise reduction effect.Second glass plate 200
It being placed in 100 outside of the first glass plate and has certain angle with vertical direction, the first glass plate 100 is arranged along vertical direction, with
Weaken the resonance effects of two pieces of glass plates.
Circumferential side frame surface of two pieces of glass plates between 40mm~50mm, two pieces of glass plates is pasted with one layer of 1-3cm
Sound-absorbing sponge, that is, bloop 210 of width, the sound-absorbing sponge 210 can fit the high-frequency noises between two pieces of glass plates
Work as inhibition.It is connect between layer glass plate using soft, avoids acoustic bridge phenomenon.The windowpane ontology frame 310 uses plastic-steel material,
Door and window assembling uses welding procedure, and the closed multi-cavity structure of plastic-steel material has shielding action to noise.Plastic-steel frame and glass
Using sealant 320 sealings of EPDM material between plate.
It is connected between the passive noise reduction system and active noise reduction system by four vacuum chucks 190, i.e. active noise reduction device
110 4 jiaos of shell are adsorbed on 100 inner surface of the first glass plate by sucker 190, and sucker is easy to disassemble, realize master as needed
The combination of dynamic noise reduction system and windowpane ontology with separate.
The signal input module of the active noise reduction system uses vibrating sensor, due to using non-acoustic sensor, no
There are problems that acoustic feedback, the aging of reference sensor (Mike) and non-linear is avoided, simultaneously because reference signal is not sound
Wave needs to be synthesized by the signal generator of internal system using adaptive notch filter method by known frequency and phase.
Extraneous sound source after the sound absorption of double pane and sound insulation remaining middle low-frequency broadband noise by active control system
System is to eliminate, and feedback-type system can only offset narrowband noise signals, i.e. periodic noise, therefore the present invention selects and noise is believed
Number noise then is eliminated without the feed-forward type active noise control system of the limitation.
Working principle：
Extraneous environmental noise first travels at the second glass plate 200, since air is different from glass plate characteristic impedance, works as sound
When wave penetrates the second glass plate 200, sound wave is through air and the second glass plate 200 reflection loss twice, the absorption of noise elimination patch 210
Effect enhancing sound energy attenuation；Sound wave reaches the first glass plate 100, then through two secondary reflections, transmission sound can decay again, total transmission damage
It loses bigger；After sound insulation and sound absorption that extraneous environmental noise passes through double pane, the high frequency section in noise is obtained very well
Elimination, remaining Middle and low frequency noise causes the vibration of the first glass plate 100, measures the first glass plate by vibrating sensor 150
100 vibration is simultaneously converted in electric signal (including vibration frequency and vibration displacement) incoming DSP processing module 160, and DSP handles mould
Block 160 generates identical as noise frequency after processing according to incoming signal, and the signal of opposite in phase is transported to sub-loudspeaker
140, noise cancellation signal is issued by sub-loudspeaker 140 and realizes noise reduction effect, while 170 acquisition noise of error microphone is offset
Ambient noise afterwards, and signal is passed to DSP processing module 160, the update of filter weights is completed, noise reduction effect is constantly improve
Fruit.
Effect is not significant when traditional single channel active noise control system eliminates wideband noise.To solve this problem,
The active noise reduction system first pre-processes error noise signal, i.e., by multiple bandpass filters, by error noise
Signal decomposition is the narrow band signal of multiple equal equibands, is controlled simultaneously each narrow band signal again later, and by multiple
Each counteracting noise signal that sub-loudspeaker exports system is simultaneously emitted by.
The technical advantages of the present invention are that effectively having widened the frequency band model of noise reduction using active noise reduction and passive noise reduction simultaneously
It encloses；Noise source is obtained using non-acoustic original part and directly avoids " acoustic feedback " problem；By multiple bandpass filters by broadband
Error noise signal decomposition is the narrow band signal of multiple equal equibands, and is controlled simultaneously each narrow band signal, is effectively mentioned
The high effect to wideband noise noise reduction；The basic structure of windowpane is innovatively devised, which uses high-performance material
Material more effectively reduces the transmitting of noise, and the non-parallel configuration of glass plate greatly reduces the incoming of noise.The present invention can be more
The effective noise that weakens is passed to indoor, provides more comfortable environment for people's lives, study and work.
The present invention also provides a kind of active denoising method of noise reduction glass plate led and passively combined, including fuzzy controller and
Fuzzy controller, control method is as shown in figure 4, include the following steps：
Step 1：By the vibration frequency H of the first glass plateg, the counteracting noise frequency that issues of Oscillation Amplitude A and sub-loudspeaker
Rate HsCarry out Fuzzy Processing；When without control, the vibration frequency H of the first glass plategFuzzy domain be [1,2.5], quantizing factor
It is 400；The fuzzy domain of the Oscillation Amplitude A of first glass plate is [0,1], and the quantification factor is 0.05；Output secondary is raised
The counteracting noise frequency H that sound device issuessFuzzy domain be [1,2.5], quantizing factor 400；In order to guarantee the essence of control
Degree realizes preferably control, experiment is repeated, it is determined that optimal to output and input grade, wherein first glass plate
Vibration frequency HgIt is 7 grades with Oscillation Amplitude A points；Export the counteracting noise frequency H that sub-loudspeaker issuess, output is divided into
7 grades；The fuzzy set output and input is { NB, NM, NS, 0, PS, PM, PB }.Wherein, the control of the fuzzy controller
Rule is：
The vibration frequency H of (1) first glass plategCentainly, the Oscillation Amplitude A of the first glass plate increases, and needs to increase secondary
The counteracting noise frequency H that loudspeaker issuess；
The Oscillation Amplitude A of (2) first glass plates is certain, the vibration frequency H of the first glass plategIncrease, needs to increase secondary
The counteracting noise frequency H that loudspeaker issuess；
The specific control rule of fuzzy control is detailed in table one.
The fuzzy control table for the counteracting noise frequency that one sub-loudspeaker of table issues
Fuzzy controller inputs the vibration frequency H of the first glass plategWith Oscillation Amplitude A, obtained with fuzzy control rule table one
The counteracting noise frequency H that the output sub-loudspeaker of fuzzy controller issues outs, the counteracting noise frequency of sub-loudspeaker sending
HsUtilize gravity model appoach defuzzification.
Step 2：Fuzzy controller
By the ecotopia noise frequency after the noise cancellation of i-th of noise reduction processIt makes an uproar with the environment after noise cancellation
Acoustic frequency HsiDeviation e, deviation variation rate ec, export PID proportionality coefficient, proportion integral modulus and differential coefficient obscured
Processing, when without control, the fuzzy domain of deviation e is [- 1,1], quantizing factor 50；The fuzzy domain of deviation variation rate ec be [-
3,3], quantizing factor 10；The Proportional coefficient K of PIDpFuzzy domain be [- 1,1], quantizing factor 0.1；Proportional integration
COEFFICIENT KiFuzzy domain be [- 1,1], quantizing factor 0.1；Differential coefficient KdFuzzy domain be [- 1,1], quantification
The factor is 0.0001.In order to guarantee the precision of control, realizes preferably control, experiment is repeated, it is determined that optimal input
And output level, wherein the fuzzy controller large deviations e, deviation variation rate ec points are 7 grades；Export the ratio system of PID
Number, proportion integral modulus and differential coefficient are divided into 7 grades；The fuzzy set output and input be NB, NM, NS, 0, PS, PM,
PB }, the subordinating degree function output and input is all made of triangular membership, is detailed in Fig. 5-12.Its fuzzy control rule is：
1, when deviation | e | when larger, increase KpValue, so that deviation be made quickly to reduce, but produce simultaneously biggish
Deviation variation rate should take lesser Kd, usually take Ki=0；
2, as | ec | and | e | when value is in medium, to avoid overshoot, suitably reduction KpValue, make KiIt is smaller, selection
Appropriately sized Kd；
3, when deviation | e | when smaller, increase KpKiValue, to avoid the occurrence of the shakiness oscillated about in systematic steady state value
Determine phenomenon, usually make to work as | ec | when larger, take lesser Kd；When | ec | when smaller, take biggish Kd；Specific fuzzy control rule
Then it is detailed in table two, three and four.
The Proportional coefficient K of two PID of tablepFuzzy control table
The proportion integral modulus K of three PID of tableiFuzzy control table
The differential coefficient K of four PID of tabledFuzzy control table
Ecotopia noise frequency after inputting the noise cancellation of i-th of noise reduction processWith the environment after noise cancellation
Noise frequency HsiDeviation e, deviation variation rate ec, export the proportionality coefficient, proportion integral modulus and differential coefficient of PID, ratio
Coefficient, proportion integral modulus and differential coefficient carry out defuzzification with height method, and input PID controller carries out counteracting noise frequency
HsError compensation control, control formula be：
It is determined repeatedly through testing, the counteracting noise frequency H that fuzzy controller issues sub-loudspeakersIt carries out accurate
Control, the counteracting noise frequency H that sub-loudspeaker issuessIt is missed for the output frequency of fuzzy controller and the frequency of PID controller
The adduction of poor offset, so that the counteracting noise frequency H that sub-loudspeaker issuessIt is precisely controlled, is less than its deviation
0.1%.
The active denoising method for the noise reduction glass plate that master provided by the invention passively combines, based on fuzzy control method according to
The vibration frequency and Oscillation Amplitude of first glass plate determine the defeated counteracting noise frequency H of sub-loudspeakers, improve noise reduction effect
Fruit.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (10)
1. a kind of lead the noise reduction glass plate passively combined, which is characterized in that including：
First glass plate, is vertically arranged；
Active noise reduction device shell is adsorbed on the inside of first glass plate, and center is to far from first glass plate side
Protrusion is cylindrical structure, and quadrangle is provided with support arm；
Sub-loudspeaker is arranged on the support arm, and opening direction is directed away from first glass plate side；
Vibrating sensor is arranged between first glass plate and active noise reduction device shell, and two sides are respectively with described the
One glass plate and the contact of active noise reduction device shell；
Processor is arranged in the cylindrical structure, for receiving the detection data of the vibrating sensor and controlling institute
It states sub-loudspeaker and issues counteracting noise.
2. the main noise reduction glass plate passively combined as described in claim 1, which is characterized in that further include：
Second glass plate is arranged on the outside of first glass plate, and lower part is obliquely installed outward；
Wherein, the thickness of first glass plate is greater than second hyaline thickness.
3. the noise reduction glass plate passively combined as claimed in claim 2 main, which is characterized in that the processor includes：
Processing module is arranged in the cylindrical structure, and is arranged close to first glass plate；
Error microphone is arranged far from the cylindrical structure end face center of first glass plate；
Battery is arranged in the cylindrical structure, and between the processing module and the error microphone.
4. the main noise reduction glass plate passively combined as claimed in claim 3, which is characterized in that further include：
Sucker is arranged between first glass plate and the support arm, for the active noise reduction device shell to be adsorbed on
On first glass plate；
Frame, be provided at circumferentially spaced it is fluted, for fixing first glass plate and second glass plate；
Sealing strip is arranged in the groove, for sealing first glass plate and frame and second glass respectively
Plate and frame；
Bloop is arranged between first glass plate and the second glass plate, and is adsorbed on the frame.
5. the noise reduction glass plate that master as claimed in claim 1,2 or 3 passively combines, which is characterized in that the vibrating sensor
It is arranged at the active noise reduction device casing center.
6. the main noise reduction glass plate passively combined as claimed in claim 2 or claim 3, which is characterized in that first glass plate
With a thickness of 6~8mm, plate as second glass with a thickness of 2~3mm, first glass plate and second glass plate
Spacing is 40~50mm.
7. the main noise reduction glass plate passively combined as claimed in claim 4, which is characterized in that the width of the bloop is 10
~30mm, the error microphone are 20~30mm at a distance from first glass plate.
8. a kind of active denoising method for leading the noise reduction glass plate passively combined, which is characterized in that including fuzzy controller：
By the vibration frequency H of the first glass plategFuzzy controller, the first glass in the fuzzy controller are inputted with Oscillation Amplitude A
The vibration frequency H of plategIt is 7 grades with Oscillation Amplitude A points；
Fuzzy controller exports the counteracting noise frequency H that sub-loudspeaker issuess, export and be divided into 7 grades；
The vibration frequency H of first glass plategFuzzy domain be [1,2.5], quantizing factor 400；First glass
The fuzzy domain of the Oscillation Amplitude A of plate is [0,1], and the quantification factor is 0.05；Export the counteracting noise that sub-loudspeaker issues
Frequency HsFuzzy domain be [1,2.5], quantizing factor 400；
The fuzzy set output and input is { NB, NM, NS, 0, PS, PM, PB }.
9. the active denoising method of the main noise reduction glass plate passively combined as claimed in claim 8, which is characterized in that further include
Fuzzy controller：
Ecotopia noise frequency after inputting the noise cancellation of i-th of noise reduction processWith the ambient noise after noise cancellation
Frequency HsiDeviation e, deviation variation rate ec, export the proportionality coefficient, proportion integral modulus and differential coefficient of PID, proportionality coefficient,
Proportion integral modulus and differential coefficient input PID controller carry out offsetting noise frequency HsError compensation control.
10. the active denoising method for the noise reduction glass plate that master as claimed in claim 9 passively combines, which is characterized in that
Ecotopia noise frequency after the noise cancellationWith the ambient noise frequency H after noise cancellationsiDeviation e
Fuzzy domain is [- 1,1], and the quantification factor is 50；The fuzzy domain of the deviation variation rate ec is [- 3,3], the quantification factor
It is 10；
The fuzzy domain of the proportionality coefficient of the output PID is [- 1,1], and the quantification factor is 0.1；Proportion integral modulus
Fuzzy domain is [- 1,1], and the quantification factor is 0.1；The fuzzy domain of differential coefficient is [- 1,1], and the quantification factor is
0.0001；
The deviation e and deviation variation rate ec points are 7 grades；The output proportionality coefficient of PID, proportion integral modulus and micro-
Coefficient is divided to be divided into 7 grades；
The fuzzy set of the fuzzy controller output and input is { NB, NM, NS, 0, PS, PM, PB }.
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| CN109435866A (en) * | 2018-12-24 | 2019-03-08 | 吉林大学 | A kind of automobile cab sound absorber and its control method |
| CN110189738A (en) * | 2019-07-09 | 2019-08-30 | 吉林大学 | A kind of device and its noise reduction optimization method for active noise reduction |
| CN112802442A (en) * | 2021-04-15 | 2021-05-14 | 上海鹄恩信息科技有限公司 | Control method of electrostatic field noise reduction glass, electrostatic field noise reduction glass and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109435866A (en) * | 2018-12-24 | 2019-03-08 | 吉林大学 | A kind of automobile cab sound absorber and its control method |
| CN109435866B (en) * | 2018-12-24 | 2024-02-06 | 吉林大学 | Sound absorption device for automobile cab and control method thereof |
| CN110189738A (en) * | 2019-07-09 | 2019-08-30 | 吉林大学 | A kind of device and its noise reduction optimization method for active noise reduction |
| CN112802442A (en) * | 2021-04-15 | 2021-05-14 | 上海鹄恩信息科技有限公司 | Control method of electrostatic field noise reduction glass, electrostatic field noise reduction glass and storage medium |
| CN113488015A (en) * | 2021-06-23 | 2021-10-08 | 武汉理工大学 | Active control system and control method for mixing structural sound and air sound of excavator cab |
| CN113488015B (en) * | 2021-06-23 | 2024-03-15 | 武汉理工大学 | Active control system and control method for mixing structural sound and air sound of cab of excavator |
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