CN108801451A - A kind of inspection method of seat waist vibration - Google Patents
A kind of inspection method of seat waist vibration Download PDFInfo
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- CN108801451A CN108801451A CN201810903638.4A CN201810903638A CN108801451A CN 108801451 A CN108801451 A CN 108801451A CN 201810903638 A CN201810903638 A CN 201810903638A CN 108801451 A CN108801451 A CN 108801451A
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- seat
- vibration
- lumbar
- waist
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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Abstract
The invention discloses a kind of inspection methods of seat waist vibration, lead to the problem of seat lumbar vibration operating mode occur by obtaining；Vehicle obtains the reference frequency characteristic of seat lumbar vibration in motion state and under problem operating mode；Vehicle analyzes the mode of seat lumbar and Seat-fixed point in stationary state and under problem operating mode, and obtains the practical frequency characteristic of the vibration of seat lumbar and Seat-fixed point；Compare the practical frequency characteristic and whether the reference frequency characteristic is consistent, if consistent, it then determines that the mode is the strong correlation factor for causing seat waist to vibrate, is checked to which the root realization of seat waist vibration is accurate, reference is provided for vehicle production.
Description
Technical field
The present invention relates to the inspection methods that field of vehicle seats more particularly to a kind of seat waist are vibrated.
Background technology
With the development and application of automotive engineering at home, the NVH performances of automobile have become its most important performance it
One.
Good automobile public praise must have good NVH performances as support.Wherein the vibration comfort of seat is also NVH
The important component of performance, the source that the vibration of automotive seat generates includes power drive system, air inlet system and exhaust system, road excitation
Etc. a variety of vibration stimulus sources, the vibration of some of which path excitation may result in middle row's seat waist and generate strong shake
It is dynamic.And strong waist vibration can bring driver subjective sense of discomfort, or even phenomena such as dizzy, nauseous can be caused.Cause
This, analysis and the control of the waist vibration problem of middle row's seat seem very crucial.
The generation of seat lumbar abnormal vibrations is divided to two aspects：First, the driving frequency and seat that are subject to due to seat itself
Modal coupling is so that seat generates resonance；Second is that since seat itself or its installation point vibration resistance itself are poor, by sharp
Forced vibration is generated when encouraging and is amplified vibration.The existing rectification at the uniform velocity operating mode seat lumbar abnormal vibrations relies primarily on
The experience of NVH engineer, the main parts size to influencing at the uniform velocity seat lumbar abnormal vibrations carry out single or associativity row
Except property is tested, such as reinforce the test of chair framework and original state chair framework by comparison, to determine chair framework intensity to even
The effect of fast seat abnormal vibrations, the systematic investigation flow of neither one, and accuracy is poor.
Invention content
The object of the present invention is to provide a kind of inspection methods of seat waist vibration, to solve in the prior art ask
Topic can vibrate seat waist and accurately be checked.
The present invention provides a kind of inspection method of seat waist vibration, the reviewing party of the seat waist vibration
Method includes：
Step 1, obtaining leads to the problem of seat lumbar vibration operating mode occur；
Step 2, for vehicle in motion state and under problem operating mode, the reference frequency for obtaining seat lumbar vibration is special
Property；
Step 3, vehicle analyzes the mould of seat lumbar and Seat-fixed point in stationary state and under problem operating mode
State, and obtain the practical frequency characteristic of the vibration of seat lumbar and Seat-fixed point；
Compare the practical frequency characteristic and whether the reference frequency characteristic is consistent, if unanimously, it is determined that the mode
For the strong correlation factor for causing seat waist to vibrate.
Preferably, the step 1 specifically includes：
The Oscillation Amplitude that seat lumbar vibrates under different operating modes is obtained, determines that the corresponding operating mode of maximum vibration amplitude is first
Beginning operating mode；
Obtain the frequency characteristic that seat lumbar vibrates under initial operating mode；
If peak value occurs in seat lumbar Oscillation Amplitude under initial operating mode, the initial operating mode is the problem operating mode of reality.
Preferably, the step 3 further includes：
Vehicle obtains the dynamic stiffness of seat lumbar and Seat-fixed point in stationary state and under problem operating mode；
Compare the dynamic stiffness and a reference value, if the dynamic stiffness is less than a reference value, the dynamic stiffness is to lead to vehicle
The strong correlation factor of seat lumbar vibration.
Preferably, the step 3 further includes：
Change the dynamic stiffness and/or mode of seat lumbar and/or Seat-fixed point；
Obtain the practical frequency characteristic of the vibration of seat lumbar；
If Oscillation Amplitude peak value the shaking less than the seat lumbar before dynamic stiffness of the seat lumbar after dynamic stiffness change
Dynamic amplitude peak, it is determined that the dynamic stiffness and/or mode are the strong correlation factor for causing seat waist to vibrate.
Preferably, the inspection method of the seat waist vibration further includes：
Step 4, vibration is transferred to seat by transmission path from vibration source, and vehicle is in stationary state and is in problem work
Under condition, the frequency characteristic of the parts vibration in transmission path is obtained；
Obtain the vibration width with the parts of the immediate transmission path of frequency corresponding to seat lumbar Oscillation Amplitude peak value
Spend frequency corresponding to peak value, it is determined that the transmission path is the strong correlation path for causing seat waist to vibrate.
Preferably, the step 4 further includes：
Change the condition of transmitting of the transmission path；
Obtain the practical frequency characteristic of the vibration of seat lumbar；
If the Oscillation Amplitude peak value of the seat lumbar after condition of transmitting change is less than the seat lumbar before condition of transmitting
Oscillation Amplitude peak value, it is determined that the condition of transmitting be cause seat waist vibrate strong correlation factor.
Preferably, the transmission path respectively includes：
Path one：Engine, suspension, vehicle body sheet metal, Seat-fixed point, seat lumbar；
Path two：Engine, suspension, fore sub frame, vehicle body sheet metal, Seat-fixed point, seat lumbar；
Path three：Engine, exhaust pipe, vehicle body sheet metal, Seat-fixed point, seat lumbar；
Path four：Road surface, tire, suspension, vehicle body sheet metal, Seat-fixed point, seat lumbar.
The inspection method of seat waist vibration provided by the invention leads to occur seat lumbar vibration by obtaining
Problem operating mode；Vehicle obtains the reference frequency characteristic of seat lumbar vibration in motion state and under problem operating mode；Vehicle
In stationary state and under the problem operating mode, analyze the mode of seat lumbar and Seat-fixed point, and obtain seat lumbar and
The practical frequency characteristic of the vibration of Seat-fixed point；Compare the practical frequency characteristic and the reference frequency characteristic whether one
It causes, if unanimously, it is determined that the mode is the strong correlation factor for causing seat waist to vibrate, to which seat waist shakes
Dynamic root realizes accurate inspection, and reference is provided for vehicle production.
Description of the drawings
Fig. 1 is the flow diagram of the inspection method of seat waist provided in an embodiment of the present invention vibration；
Fig. 2 is the seat lumbar frequency domain oscillating curve figure that further embodiment of this invention provides；
Fig. 3 is the transmission path specificity analysis for the seat lumbar vibration peak strong correlation that further embodiment of this invention provides
Figure.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not construed as limiting the claims.
The frequency characteristic of the present invention is generally realized by frequency-domain analysis, i.e., obtains frequency domain oscillating curve figure by test
The form analysis of (horizontal axis is frequency, and the longitudinal axis is Oscillation Amplitude) obtains.
As shown in Figure 1, the embodiment of the present invention provides a kind of inspection method of seat waist vibration, the seat
Waist vibration inspection method include：
Step 1, obtaining leads to the problem of seat lumbar vibration operating mode occur；
Specifically, the Oscillation Amplitude that seat lumbar vibrates under different operating modes is obtained, determines that maximum vibration amplitude is corresponding
Operating mode is initial operating mode；Generally by artificial subjective assessment, such as by engine speed, gear, speed variation, observe seat
Extent of vibration, with the initial operating mode of determination；
Obtain the frequency characteristic that seat lumbar vibrates under initial operating mode；
If peak value occurs in seat lumbar Oscillation Amplitude under initial operating mode, illustrate that test data is kissed with subjective evaluation result
It closes, then the initial operating mode is practical problem operating mode.Such as the corresponding peak values of 22Hz in Fig. 2.
Step 2, for vehicle in motion state and under problem operating mode, the reference frequency for obtaining seat lumbar vibration is special
Property；It is the frequency curve of certain vehicle at the uniform velocity 60km/h operating modes seat lumbar vibration, there are bright for subjective assessment seat lumbar in Fig. 2
Aobvious Y-direction plays back of the body sense, coincide with the Oscillation Amplitude peak value of objective examination's data Y-direction 22Hz or so.
Step 3, vehicle analyzes the mould of seat lumbar and Seat-fixed point in stationary state and under problem operating mode
State, and obtain the practical frequency characteristic of the vibration of seat lumbar and Seat-fixed point；
Compare the practical frequency characteristic and whether the reference frequency characteristic is consistent, if unanimously, it is determined that the mode
For the strong correlation factor for causing seat waist to vibrate.
Specifically, for example, obtaining the practical frequency characteristic of the vibration of seat lumbar and Seat-fixed point, i.e., by testing
Know that seat lumbar and installation point modal response characteristic (the corresponding frequency of Oscillation Amplitude peak value) are 25Hz or so, with problem operating mode
22Hz is misaligned, does not resonate, it is determined that and this mode is not the strong correlation factor for causing seat waist to vibrate, and if
This modal response characteristic is overlapped with the 22Hz of problem operating mode, it is determined that is strong correlation factor.
Preferably, the step 3 further includes：
Vehicle obtains the dynamic stiffness of seat lumbar and Seat-fixed point in stationary state and under problem operating mode；
Compare the dynamic stiffness and a reference value, if the dynamic stiffness is less than a reference value, the dynamic stiffness is to lead to vehicle
The strong correlation factor of seat lumbar vibration.
Specifically, for example, the response characteristics such as certain vehicle seat lumbar and installation point dynamic stiffness are respectively less than 50N/mm, less than base
Quasi- value, it may be determined that seat is also easy to produce forced vibration, so that it is determined that dynamic stiffness be cause seat waist vibrate strong correlation because
Element.
Preferably, the step 3 further includes verification step：
Change the dynamic stiffness and/or mode of seat lumbar and/or Seat-fixed point；
Obtain the practical frequency characteristic of the vibration of seat lumbar；
If Oscillation Amplitude peak value the shaking less than the seat lumbar before dynamic stiffness of the seat lumbar after dynamic stiffness change
Dynamic amplitude peak, it is determined that the dynamic stiffness and/or mode are the strong correlation factor for causing seat waist to vibrate.
Preferably, the inspection method of the seat waist vibration further includes the determination step of transmission path：
Step 4, vibration is transferred to seat by transmission path from vibration source, preferably, the transmission path wraps respectively
It includes：
Path one：Engine, suspension, vehicle body sheet metal, Seat-fixed point, seat lumbar；
Path two：Engine, suspension, fore sub frame, vehicle body sheet metal, Seat-fixed point, seat lumbar；
Path three：Engine, exhaust pipe, vehicle body sheet metal, Seat-fixed point, seat lumbar；
Path four：Road surface, tire, suspension, vehicle body sheet metal, Seat-fixed point, seat lumbar.
Specifically, vehicle obtains each zero in each transmission path in stationary state and under problem operating mode
The frequency characteristic of part vibration；
Obtain the vibration width with the parts of the immediate transmission path of frequency corresponding to seat lumbar Oscillation Amplitude peak value
Spend frequency corresponding to peak value, it is determined that the transmission path is the strong correlation path for causing seat waist to vibrate.
Wherein, the Vibration Condition under problem operating mode such as each parts, metal plate in each transmission path is surveyed
Examination determines that frequency corresponding to the Oscillation Amplitude peak value of parts in each transmission path and seat lumbar Oscillation Amplitude peak value institute are right
That immediate transmission path of frequency is answered, then, which is the strong correlation path for causing seat waist to vibrate；
As shown in figure 3, the vibration frequency peak value in certain vehicle suspension path is corresponding with the 22Hz peak values that seat lumbar vibrates, (black is perpendicular in figure
Line), it can confirm that suspension path is the strong correlation path for causing seat lumbar to vibrate.
Preferably, the step 4 further includes verification step：
Change the condition of transmitting of the transmission path；
Obtain the practical frequency characteristic of the vibration of seat lumbar；
If the Oscillation Amplitude peak value of the seat lumbar after condition of transmitting change is less than the seat lumbar before condition of transmitting
Oscillation Amplitude peak value, it is determined that the condition of transmitting be cause seat waist vibrate strong correlation factor.
Wherein, in above verification step, by changing strong correlation path transmission characteristic and response characteristic (dynamic stiffness and mould
State)-the higher path characteristics of correlation and response characteristic are changed, such as apply such as counterweight, reinforcement, increase dynamic absorber
Device reduces the measures such as suspension rate, while monitoring variation and the seat lumbar vibration amplitude of the characterisitic parameter.If path characteristics are joined
When number, response characteristic Parameters variation, waist vibration amplitude reduces simultaneously, it is determined that the parameter is to cause seat lumbar abnormal
The critical path of shake or crucial response characteristic.
Such as：Method by reinforcing chair framework and installation point dynamic stiffness, after changing certain vehicle seat lumbar dynamic stiffness
(by 40N/mm promotions to 150N/mm or so), seat lumbar vibration amplitude is by 0.5m/s2Drop to 0.3m/s2, then can determine sound
It is key characteristic to answer the dynamic stiffness characteristic in characteristic.
Method by reducing suspension rate, after changing certain vehicle suspension vibration transport characteristic (by 20% promoted to
10% or so), seat lumbar vibration amplitude is by 0.31m/s2Drop to 0.21m/s2, then can determine that the suspension in transmission characteristic passes
It is key characteristic to pass rate characteristic.
The structure, feature and effect of the present invention, the above institute are described in detail based on the embodiments shown in the drawings
Only presently preferred embodiments of the present invention is stated, but the present invention is not to limit practical range, every structure according to the present invention shown in drawing
Change made by thinking, or is revised as the equivalent embodiment of equivalent variations, when not going beyond the spirit of the description and the drawings,
It should all be within the scope of the present invention.
Claims (7)
1. a kind of inspection method of seat waist vibration, which is characterized in that the reviewing party of the seat waist vibration
Method includes：
Step 1, obtaining leads to the problem of seat lumbar vibration operating mode occur；
Step 2, vehicle obtains the reference frequency characteristic of seat lumbar vibration in motion state and under problem operating mode；
Step 3, vehicle analyzes the mode of seat lumbar and Seat-fixed point in stationary state and under problem operating mode, and
Obtain the practical frequency characteristic of the vibration of seat lumbar and Seat-fixed point；
Compare the practical frequency characteristic and whether the reference frequency characteristic is consistent, if unanimously, it is determined that the mode is to lead
Cause the strong correlation factor of seat waist vibration.
2. the inspection method of seat waist vibration according to claim 1, which is characterized in that the step 1 is specific
Including：
The Oscillation Amplitude that seat lumbar vibrates under different operating modes is obtained, determines that the corresponding operating mode of maximum vibration amplitude is initial work
Condition；
Obtain the frequency characteristic that seat lumbar vibrates under initial operating mode；
If peak value occurs in seat lumbar Oscillation Amplitude under initial operating mode, the initial operating mode is the problem operating mode of reality.
3. the inspection method of seat waist vibration according to claim 1, which is characterized in that the step 3 is also wrapped
It includes：
Vehicle obtains the dynamic stiffness of seat lumbar and Seat-fixed point in stationary state and under problem operating mode；
Compare the dynamic stiffness and a reference value, if the dynamic stiffness is less than a reference value, the dynamic stiffness is to lead to seat
The strong correlation factor of waist vibration.
4. the inspection method of seat waist vibration according to claim 3, which is characterized in that the step 3 is also wrapped
It includes：
Change the dynamic stiffness and/or mode of seat lumbar and/or Seat-fixed point；
Obtain the practical frequency characteristic of the vibration of seat lumbar；
If the Oscillation Amplitude peak value of the seat lumbar after dynamic stiffness change is less than the vibration width of the seat lumbar before dynamic stiffness
Spend peak value, it is determined that the dynamic stiffness and/or mode are the strong correlation factor for causing seat waist to vibrate.
5. the inspection method of seat waist vibration according to claim 1, which is characterized in that the seat waist
Portion vibration inspection method further include：
Step 4, vibration is transferred to seat by transmission path from vibration source, and vehicle is in stationary state and is in problem operating mode
Under, obtain the frequency characteristic of the parts vibration in transmission path；
Obtain the Oscillation Amplitude peak with the parts of the immediate transmission path of frequency corresponding to seat lumbar Oscillation Amplitude peak value
The corresponding frequency of value, it is determined that the transmission path is the strong correlation path for causing seat waist to vibrate.
6. the inspection method of seat waist vibration according to claim 5, which is characterized in that the step 4 is also wrapped
It includes：
Change the condition of transmitting of the transmission path；
Obtain the practical frequency characteristic of the vibration of seat lumbar；
If Oscillation Amplitude peak value the shaking less than the seat lumbar before condition of transmitting of the seat lumbar after condition of transmitting change
Dynamic amplitude peak, it is determined that the condition of transmitting is the strong correlation factor for causing seat waist to vibrate.
7. the inspection method of seat waist vibration according to claim 5, which is characterized in that the transmission path point
Do not include：
Path one：Engine, suspension, vehicle body sheet metal, Seat-fixed point, seat lumbar；
Path two：Engine, suspension, fore sub frame, vehicle body sheet metal, Seat-fixed point, seat lumbar；
Path three：Engine, exhaust pipe, vehicle body sheet metal, Seat-fixed point, seat lumbar；
Path four：Road surface, tire, suspension, vehicle body sheet metal, Seat-fixed point, seat lumbar.
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| CN201810903638.4A CN108801451B (en) | 2018-08-09 | 2018-08-09 | method for checking vibration of waist of vehicle seat |
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| CN201810903638.4A CN108801451B (en) | 2018-08-09 | 2018-08-09 | method for checking vibration of waist of vehicle seat |
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| CN109520613A (en) * | 2018-11-29 | 2019-03-26 | 安徽江淮汽车集团股份有限公司 | A kind of detection method of pure electric vehicle van-type commercial vehicle interior roar sound |
| CN110954339A (en) * | 2019-11-29 | 2020-04-03 | 安徽江淮汽车集团股份有限公司 | Method for detecting abnormal component in automobile, terminal device and storage medium |
| CN114112441A (en) * | 2021-12-24 | 2022-03-01 | 安徽江淮汽车集团股份有限公司 | Jitter debugging method for idle charging condition of hybrid vehicle |
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