CN109911019A - A kind of pneumatic noise reduction automobile A column device and its control method based on active vortex control - Google Patents
A kind of pneumatic noise reduction automobile A column device and its control method based on active vortex control Download PDFInfo
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- 230000009467 reduction Effects 0.000 title claims abstract description 35
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- 238000012937 correction Methods 0.000 claims description 5
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- 238000006073 displacement reaction Methods 0.000 description 7
- 230000003321 amplification Effects 0.000 description 5
- 238000003199 nucleic acid amplification method Methods 0.000 description 5
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- 238000009960 carding Methods 0.000 description 3
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Abstract
The invention discloses a kind of pneumatic noise reduction automobile A column devices based on active vortex control, comprising: A column is equidistantly positioned multiple mounting holes along its length；Multiple vortex generators, setting is in the mounting hole and through the mounting hole；Connecting rod is arranged on the inside of the A column, and is connected with described vortex generator one end；Two groups of lead screw mould groups drive the surface of the relatively described A column of the connecting rod to move up and down；PLC controller connects the lead screw mould group.It by two pairs of lead screw mould groups controls height of multiple vortex generators relative to A column surface to the present invention, pneumatic noise reduction of the realization based on vortex generator.The present invention also provides a kind of control methods of pneumatic noise reduction automobile A column device based on active vortex control, acquire real-time speed by car speed sensor, the height on A column surface is controlled according to real-time speed, realize DNR dynamic noise reduction.
Description
Technical field
The present invention relates to aerodynamics noise reduction field more particularly to a kind of pneumatic noise reduction vapour based on active vortex control
Vehicle A column device and its control method.
Background technique
With the development of economy, automobile industry development is rapid, and automobile has become the vehicles the most convenient and fast instantly.But
It is the raising increased with speed with car ownership, serious shadow also increasing in the aerodynamic noise that it is generated when driving
Ring the riding comfort and driving safety of automobile.Researcher and automaker increasingly pay attention in automobile pneumatic at this stage
The analysis and control of noise.
Aerodynamic noise refers in running car, air-flow can be caused to separate when air-flow flows through bodywork surface high spot, occurs
Turbulent flow and the noise generated.Studies have shown that the source of Automotive Pneumatic Noise is mainly hood, front of the car bottom plate, front window
With the positions such as rear window.Wherein, in high-frequency range, for driver, front window region is main noise source, because of air-flow
Long vortex wake is formed in the region, causes the pressure fluctuation that side window surface is violent.Therefore, have to the flow field in the region
Effect combing is significant to raising vehicle ride comfort and driving safety to reduce levels of aerodynamic noise.
Vortex control be for vortex generate region, take improve be vortexed method come achieve the purpose that comb flow field,
The structure that some passive control vortex are installed in the region that vortex generates is common method, and this kind of vortex control structure is known as whirlpool
Flow-generator.Vortex control at this stage in aviation field using relatively broad, it is seldom in automotive field application.
Currently, the vehicle A column structure that most of automobile is smooth using surface, can not have the flow field in front window region
The combing of effect can generate strong aerodynamic noise in galloping, seriously affect automobile vehicle ride comfort and
Driving safety.In addition, non-smooth surface has the A -pillar structure of certain pneumatic noise reduction effect, structure is fixed, Wu Fashi
To the optimization of vehicle Flow Field outside carding effect when existing automobile is run at high speed with friction speed, pneumatic noise reduction effect is very limited,
And it will increase the aerodynamic noise of automobile instead when automobile is run at a low speed.
Studies have shown that the identical vortex generator of dimensional parameters, under the conditions of different flow field velocities, reduce air-flow separation and
The effect for improving vortex is not also identical, and under the conditions of different flow fields environments, the carding effect of vortex generator stream field is different,
When flow field velocity is lower, the height dimension that vortex generator is exposed in flow field is excessive to will increase automobile noise instead；It is flowing
When field speed degree is higher, with the increase of flow field velocity, to keep vortex generator stream field that there is optimal carding effect, Ying Shi
The height dimension in flow field is exposed to when increasing vortex generator.
Summary of the invention
The present invention is to solve current technology shortcoming, provides a kind of pneumatic noise reduction vapour based on active vortex control
Vehicle A column device controls height of multiple vortex generators relative to A column surface by two pairs of lead screw mould groups, realizes and be based on whirlpool
The pneumatic noise reduction of flow-generator.
The present invention also provides a kind of control methods of pneumatic noise reduction automobile A column device based on active vortex control, pass through
Car speed sensor acquires real-time speed, and the height on A column surface is controlled according to real-time speed, realizes pneumatic noise reduction.
Technical solution provided by the invention are as follows: a kind of pneumatic noise reduction automobile A column device based on active vortex control, packet
It includes:
A column is equidistantly positioned multiple mounting holes along its length；
Multiple vortex generators, setting is in the mounting hole and through the mounting hole；
Connecting rod is arranged on the inside of the A column, and is connected with one end of the vortex generator；
Two groups of lead screw mould groups drive the surface of the relatively described A column of the connecting rod to move up and down；
Controller connects the lead screw mould group.
Preferably, the lead screw mould group includes:
Pedestal, one side surface have groove, and the groove two sides have sliding rail；
Motor, setting is in the groove；
Screw rod, the output axis connection with the motor；
Feed screw nut, matches setting with the lead screw, and the feed screw nut is connected the connecting rod.
Preferably, further includes:
Surface on the base is arranged in sliding rail, is located at the groove two sides；
Sliding block, middle part are connected the feed screw nut, and both ends slideably match in the sliding rail.
Preferably, further includes:
Vehicle speed sensor is arranged in automobile gearbox output end；
Shaping amplifier is arranged by the vehicle speed sensor, connects the vehicle speed sensor and the controller.
Preferably,
Sealing ring is set on the inside of the mounting hole, and slotted liner is arranged in lower section；
Wherein, the vortex generator is arranged in the fluting.
Preferably,
The bottom lengths of the vortex generator are 34.5~35.5mm, and width is 4.7~5.3mm, highly for 7.0~
8.0mm。
A kind of control method of the pneumatic noise reduction automobile A column device based on active vortex control, comprising:
The real-time vehicle speed information of automobile is acquired according to vehicle speed sensor；
PLC controller controls lead screw mould group according to real-time vehicle speed information, adjust vortex generator relative to A column outside
The height on surface.
Preferably, further includes:
When speed v meets v < 70, the height of vortex generator is kept to meet h=h0, wherein h0For the first of vortex generator
Begin height；
When speed v meets 70≤v≤9, the height of 0 adjusting vortex generator meets 2.5mm≤h≤3.5mm；
When speed v meets 90 < v≤11, the height of 0 adjusting vortex generator meets 4.5mm≤h≤5.5mm；
When speed v meets v > 110, the height for adjusting vortex generator meets 6mm < h≤7mm.
Preferably,
When speed v meets 70≤v≤90, the height for controlling vortex generator meets:
Wherein, f is correction coefficient, and H is the oneself height of vortex generator, and n is the number of vortex generator, L1For vortex
The bottom lengths of generator, W are the bottom width of vortex generator, and P is the rated power of motor, and N is the rated speed of motor,
h0For the elemental height of vortex generator.
Preferably,
The elemental height h0=2.0mm.
It is of the present invention the utility model has the advantages that 1) present invention during running car by car speed sensor acquisition
Real-time speed controls height of multiple vortex generators relative to A column surface by two pairs of lead screw mould groups, realizes to based on whirlpool
The pneumatic noise reduction of flow-generator.Automobile A column controls height of multiple vortex generators relative to A column surface according to real-time speed,
So that it is matched the combing effect in front window region flow field and the real-time environmental conditions in flow field, realizes pneumatic to front window region
The optimization of noise reduction effect improves the riding comfort and driving safety of automobile；2) a variety of models can be widely used in,
It is applied widely, there is higher reliability, can satisfy the demand of user；3) in multiple vortex hair of automobile A column surface installation
Raw device, improves the technology sense and artistic feeling of vehicle modeling.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the pneumatic noise reduction automobile A column device of the invention based on active vortex control.
Fig. 2 is the structural schematic diagram of thick stick mould group of the invention.
Fig. 3 is the circuit diagram of shaping amplifier of the invention.
Fig. 4 is the front view of vortex generator of the invention.
Fig. 5 is the left view of vortex generator of the invention.
Fig. 6 is the top view of vortex generator of the invention.
Fig. 7 is the control of the optimal control device of the pneumatic noise reduction vehicle A column structure of the invention based on active vortex control
Flow chart processed.
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, a kind of pneumatic noise reduction automobile A column device based on active vortex control of the invention, comprising: automobile
A column 100, multiple mounting holes of spaced set from top to bottom on upper plate；Multiple vortex generators 110 are mounted on automobile A column
At mounting hole, penetrating mounting holes are arranged and can move up and down in hole, when it rises relative to A column surface, to vehicle Flow Field outside
With good combing effect, the aerodynamic noise in automobile front side window region can be effectively reduced.Connecting rod 130 is arranged on the inside of A column,
It is connected with one end of turbine generator 110.Two pairs of opposite A column surfaces of 150 drive link of lead screw mould group 130 move up and down.PLC control
The connection of device 140 control lead screw mould group processed.
Car speed sensor is arranged at automobile gearbox output shaft, is arranged by car speed sensor.Automobile
Fast sensor is hall effect type sensor, is connect with the PLC controller input terminal by shaping amplifier.
The input terminal of PLC controller is connect with the car speed sensor, and output end and two pairs of lead screws mould group are believed
The connection of number receiver, PLC controller obtain the real-time speed signal of automobile by the car speed sensor, and output is believed
The movement of number control two pairs of lead screws mould group sliding block, and then control the lifting of the multiple vortex generator.Automobile speed passes
Sensor is connect by shaping amplifier with the input terminal of PLC controller 140, and pulse signal is made to be amplified and be reached after Shape correction
PLC controller 140 is handled.
As shown in Fig. 2, lead screw mould group 150 includes pedestal 151, the one side of pedestal 151 has groove, and groove two sides have
Sliding slot 155.Motor 152 is arranged in groove, the output shaft connection wire rod 153 of motor 152, feed screw nut 154 and the lead screw
153 matching settings, the feed screw nut 154 are connected the connecting rod 130.
In another embodiment, the both ends of the bottom of the connected sliding block 156 of feed screw nut 154, sliding block 156 are matched in sliding slot
In 155, sliding block can be slided up and down with the movement of feed screw nut 154 along sliding slot 155.Sealing ring is set on the inside of mounting hole
120, slotted liner 160 is arranged in lower section, and the setting of slotted liner 160 and sealing ring 120 can enter in A column to avoid dirt etc.
Portion, and move up and down vortex generator steadily.
The dimensional parameters of mounting hole are as follows: bottom is grown between 36.5~37.5mm, wide between 6.7~7.3mm, and both ends
For semicircle, semicircle radius is between 3.35~3.65mm.The spacing of adjacent mounting hole is between 9.5~10.5mm.
The dimensional parameters of sealing ring 120 are as follows: bottom is grown between 36.5~37.5mm, wide between 6.7~7.3mm, and
Both ends are semicircle, and semicircle radius R is highly 2mm, with a thickness of 4mm in 3.35~3.65mm.
As Figure 4-Figure 6, multiple vortex generators, dimensional parameters are as follows: the long L1 in bottom is wide between 34.5~35.5mm
W is between 4.7~5.3mm, and whole height H is between 7.0~8.0mm, and top two sides use round-corner transition, radius of corner R1
Between 4.8~5.2mm, and the corresponding central angle of circular arc is 90 °, and two long side of top uses round-corner transition, and radius of corner R2 exists
Between 2.4~2.6mm, and the corresponding central angle of circular arc is 90 °.The multiple vortex generator is on the length direction of A column etc.
Spacing is arranged in parallel, and neighbouring vortices generator spacing is between 9.5~10.5mm.
The multiple vortex generator bottom is connect by welding manner with connecting rod, when connecting rod is subjected to displacement, multiple whirlpools
Equal displacement can also occur for flow-generator.The output shaft and screw rod of motor are welded to connect, when the output shaft of motor generates rotation
When, screw rod also generates equal rotation, and feed screw nut can generate the displacement accordingly on screw rod length direction, feed screw nut with
Sliding block is welded to connect, and when feed screw nut generates displacement, sliding block is generating equal displacement in slide direction.Two pairs of silks
Thick stick mould group sliding block, is limited between 0~5mm in the displacement range in slide direction.
Car speed sensor is hall effect type sensor, can satisfy the requirement of quick response and sensitivity, is vapour
Vehicle be equipped with electronic system pedestal sensor, specially in automobile with certain speed when driving, wheel often rotates a circle, automobile
Vehicle speed sensor can export its frequency pulse signal directly proportional to vehicle wheel rotational speed, pass through the counter counts of PLC controller
The umber of pulse in the unit time is calculated, the real-time speed of automobile can be obtained；Car speed sensor by shaping amplifier with
The input terminal of PLC controller connects, and so that pulse signal is reached PLC controller after amplification and Shape correction and is handled, wherein
In this embodiment, shaping amplifier is made of 1 operational amplifier, 1 shaping integrated circuit and several capacitors, resistance, tool
Body is shown in Fig. 3；Shaping amplifier is made of 1 operational amplification circuit and 1 shaping integrated circuit, and operational amplification circuit is transported by 1
Calculate 210,1 potentiometer VR of amplifier1With resistance R1、R2、R3Composition, shaping integrated circuit are inputted by power supply VCC, 74L,S32 42
Or door 220 and diode D1、D2, resistance R4、R5、R6Composition, UxIt is obtained after operational amplification circuit is handled for signal input part
Signal Ux'=(R1×VCC+Ux(R3+VR1+R4))/R1×R4, then shaped integrated circuit repair true processing after obtain output signal
U0, U0=β Ux, wherein β is amplification coefficient, and value is by potentiometer VR1It determines.PLC controller is big according to the speed signal of input terminal
Small output electric signal is occurred with the displacement of this sliding block for controlling lead screw mould group to control multiple vortex to two pairs of lead screw mould groups
Height of the device relative to A column surface, and then the pneumatic noise reduction effect for controlling vortex generator keeps optimal.
The present invention also provides a kind of control methods of pneumatic noise reduction automobile A column device based on active vortex control, comprising:
Step 1 is obtained according to the pedestal sensor hall effect type car speed sensor for the electronic system that automobile is equipped with
Take the real-time speed signal of automobile；
Step 2 obtains the real-time speed signal size of automobile, output according to car speed sensor using PLC controller
Signal is controlled to two pairs of lead screw mould groups, two pairs of lead screw mould group sliding blocks is controlled and slides into suitable position；
Step 3 dynamically controls height of multiple vortex generators relative to A column surface using two pairs of lead screw mould group sliding blocks
Degree.
When the real-time speed signal of automobile is between preset value 1 (70m/s) and preset value 2 (90m/s), multiple whirlpools are controlled
Flow-generator rises to preset height 1 (2.5mm~3.5mm)；When the real-time speed signal of automobile in preset value 2 (90m/s) and
When between preset value 3 (110m/s), controls multiple vortex generators and rise to preset height 2 (4.5mm~5.5mm)；Work as automobile
When real-time speed signal is more than preset value 3 (110m/s), control multiple vortex generators be increased to preset height 3 (6mm~
7mm)；When the real-time speed signal of automobile is lower than preset value 1 (70m/s), control so that multiple vortex generators drop to just
Begin height (2mm).Using multiple vortex generators relative to A column surface height control under different speeds its to vehicle Flow Field outside
With good combing effect, and then the aerodynamic noise in automobile front side window region is effectively reduced.
The rule of adjusting meets:
When speed v meets v < 70, the height of vortex generator is kept to meet h=h0, wherein h0For the first of vortex generator
Begin height；
When speed v meets 70≤v≤9, the height of 0 adjusting vortex generator meets 2.5mm≤h≤3.5mm；
When speed v meets 90 < v≤11, the height of 0 adjusting vortex generator meets 4.5mm≤h≤5.5mm；
When speed v meets v > 110, the height for adjusting vortex generator meets 6mm < h≤7mm.
When speed v meets 70≤v≤90, the height for controlling vortex generator meets:
Wherein, f is correction coefficient, numerical value 0.98；H is the oneself height of vortex generator, unit mm；N is vortex
The number of generator, L1For the bottom lengths of vortex generator, unit mm；W is the bottom width of vortex generator, and unit is
mm；P is the rated power of motor, unit W；N is the rated speed of motor, unit r/min；h0For the first of vortex generator
Begin height, unit mm.The elemental height h0=2.0mm.
The present invention acquires real-time speed by car speed sensor during running car, passes through two pairs of lead screw moulds
Group controls height of multiple vortex generators relative to A column surface, realizes to the pneumatic noise reduction automobile A based on vortex generator
Column controls height of multiple vortex generators relative to A column surface according to real-time speed, makes its comb to front window region flow field
Reason is acted on to match with the real-time environmental conditions in flow field, realizes pneumatic to front window region when driving with friction speed in automobile
The optimization of noise reduction effect improves the riding comfort and driving safety of automobile.
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 pneumatic noise reduction automobile A column device based on active vortex control characterized by comprising
A column is equidistantly positioned multiple mounting holes along its length；
Multiple vortex generators, setting is in the mounting hole and through the mounting hole；
Connecting rod, setting are connected simultaneously on the inside of the A column, and with one end of the vortex generator；
Two groups of lead screw mould groups drive the surface of the relatively described A column of the connecting rod to move up and down；
Controller connects the lead screw mould group.
2. the pneumatic noise reduction automobile A column device according to claim 1 based on active vortex control, which is characterized in that institute
Stating lead screw mould group includes:
Pedestal, one side surface have groove, and the groove two sides have sliding rail；
Motor, setting is in the groove；
Screw rod, the output axis connection with the motor；
Feed screw nut, matches setting with the lead screw, and the feed screw nut is connected the connecting rod.
3. the pneumatic noise reduction automobile A column device according to claim 2 based on active vortex control, which is characterized in that also
Include:
Surface on the base is arranged in sliding rail, is located at the groove two sides；
Sliding block, middle part are connected the feed screw nut, and both ends slideably match in the sliding rail.
4. the pneumatic noise reduction automobile A column device according to claim 3 based on active vortex control, which is characterized in that also
Include:
Vehicle speed sensor is arranged in automobile gearbox output shaft；
Shaping amplifier is arranged by the vehicle speed sensor, connects the vehicle speed sensor and the controller.
5. the pneumatic noise reduction automobile A column device according to claim 4 based on active vortex control, which is characterized in that
Sealing ring is set on the inside of the mounting hole, and slotted liner is arranged in lower section；
Wherein, the vortex generator is arranged in the fluting.
6. the pneumatic noise reduction automobile A column device according to claim 5 based on active vortex control, which is characterized in that
The bottom lengths of the vortex generator are 34.5~35.5mm, and it is highly 7.0~8.0mm that width, which is 4.7~5.3mm,.
7. a kind of control method of the pneumatic noise reduction automobile A column device based on active vortex control characterized by comprising
The real-time vehicle speed information of automobile is acquired according to vehicle speed sensor；
PLC controller controls lead screw mould group according to real-time vehicle speed information, adjusts vortex generator relative to A outer surface of column
Height.
8. the control method of the pneumatic noise reduction automobile A column device according to claim 7 based on active vortex control, special
Sign is, further includes:
When speed v meets v < 70, the height of vortex generator is kept to meet h=h0, wherein h0For the initial height of vortex generator
Degree；
When speed v meets 70≤v≤9, the height of 0 adjusting vortex generator meets 2.5mm≤h≤3.5mm；
When speed v meets 90 < v≤11, the height of 0 adjusting vortex generator meets 4.5mm≤h≤5.5mm；
When speed v meets v > 110, the height for adjusting vortex generator meets 6mm < h≤7mm.
9. the control method of the pneumatic noise reduction automobile A column device according to claim 8 based on active vortex control, special
Sign is that, when speed v meets 70≤v≤90, the height for controlling vortex generator meets:
Wherein, f is correction coefficient, and H is the oneself height of vortex generator, and n is the number of vortex generator, L1Occur for vortex
The bottom lengths of device, W are the bottom width of vortex generator, and P is the rated power of motor, and N is the rated speed of motor, h0For
The elemental height of vortex generator.
10. the control method of the pneumatic noise reduction automobile A column device according to claim 8 based on active vortex control,
It is characterized in that,
The elemental height h0=2.0mm.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113793587A (en) * | 2021-11-16 | 2021-12-14 | 中国空气动力研究与发展中心计算空气动力研究所 | Noise reduction method based on vortex array |
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| CN109367633A (en) * | 2018-11-15 | 2019-02-22 | 盐城市华悦汽车部件有限公司 | A kind of automobile stand column flow-guiding structure |
| CN209700792U (en) * | 2019-04-01 | 2019-11-29 | 吉林大学 | A kind of pneumatic noise reduction automobile A column device based on active vortex control |
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| CN113793587A (en) * | 2021-11-16 | 2021-12-14 | 中国空气动力研究与发展中心计算空气动力研究所 | Noise reduction method based on vortex array |
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