CN104182592B - The discrimination method of equivalent three mass of human body of seat human body vibrating model - Google Patents
The discrimination method of equivalent three mass of human body of seat human body vibrating model Download PDFInfo
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- CN104182592B CN104182592B CN201410446613.8A CN201410446613A CN104182592B CN 104182592 B CN104182592 B CN 104182592B CN 201410446613 A CN201410446613 A CN 201410446613A CN 104182592 B CN104182592 B CN 104182592B
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Abstract
The present invention relates to the discrimination methods of equivalent three mass of human body of seat human body vibrating model, belong to vehicle seating art field.The invention is characterized in that：According to seat human body vibrating model, establish seat body system's simulink simulation models, using Vertical Acceleration of the seat measured at cab floor installation center position as input, using the identification object function of equivalent three mass parameter of human body and using optimization algorithm, three mass equivalent to the human body of seat human body vibrating model recognizes.Using the discrimination method, it can recognize to obtain more accurately and reliably three equivalent mass of human body, so as to improve the precision of seat human body vibrating model and analysis, optimization design and raising seat comfort for seat suspension systematic parameter establish reliable basis；Meanwhile the present invention can avoid carrying out a large amount of sampling test, reduce experiment and design cost, accelerate product development speed.
Description
Technical field
The present invention relates to seat, the identification side of equivalent three mass of human body of particularly seat human body vibrating model
Method.
Background technology
Seat system comfort is one of important indicator for evaluating automotive performance.In order to improve the comfortable of motor-vehicle seat system
Property, it is necessary to seat human body vibrating model is established, so as to be analyzed seat system and optimization design.Seat human body
The accuracy of the human body equivalent mass of model of vibration directly determines the accuracy of seat human body vibrating model, so as to determine seat
The Optimum Design Results and comfort of chair system improve degree.At present, China is in the comfortable Journal of Sex Research of motor-vehicle seat system, human body
The human body equivalent mass of model of vibration is handled mainly by two methods：One kind is human body to be directly equivalent to a mass block, so
After establish corresponding vehicle model of vibration and studied, such acquired results are inaccurate；Another kind is using related human body vibration
The body mass parameter that provides of international standard, but American-European crowd is based on, because of the differences such as skeleton structure, in standard
Data cannot be directly used to China's seat comfort type research.In addition, human body-seat system is an indivisible whole system
System, many scholars cannot be directly used to seat system by the human body equivalent mass that the method for a large amount of human trials obtains and study,
This method testing expenses are high, the period is long.Therefore, at present to being suitable for the equivalent matter of human body of China's seat human body vibrating model
Amount, China there is no fast and accurately acquisition methods, it is necessary to establish equivalent three mass of human body of seat human body vibrating model
Discrimination method.
Invention content
Defect present in for the above-mentioned prior art, technical problem solved by the invention are to provide seat human body
The discrimination method of equivalent three mass of human body of model of vibration.
In order to solve the above-mentioned technical problem, equivalent three matter of the human body of seat human body vibrating model provided by the present invention
The discrimination method of amount, flow diagram is as shown in Figure 1, the implementation of its technical solution is as follows：
(1) it using vibration test equipment, measures and collects the seat under certain driving cycle and pacify in cab floor
The vertical vibration signal of vertical vibration signal and chair top at holding position center, acquire the time span of vibration signal for 0,
T }={ [0, t1]+[t1, T] }, wherein, previous time period [0, t1] vibration signal for the identification of human body equivalent three mass, it is latter
Period [t1, T] vibration signal can be used for the simulating, verifying of quality identification result；
(2) according to the requirement of seat system Analysis of Comfort, using body mass as equivalent three mass, i.e., people to be identified
Body buttocks quality mh, human upper two mass mb1And mb2；Utilize the equivalent stiffness K of seat suspensionsWith Equivalent damping coefficient Cs、
The equivalent stiffness K of seat cushionhWith Equivalent damping coefficient Ch, human upper two equivalent stiffness Kb1And Kb2, human upper it is two equivalent
Damped coefficient Cb1And Cb2, seat and seat cushion quality sum ms, build seat human body vertical direction vibration model；
(3) according to seat body system's vertical direction vibration model, using Matlab/Simulink simulation softwares, seat is established
Body system's simulation model, in previous time period [0, t1] measured by seat at cab floor installation site center
Vertical vibration acceleration signal is input signal, and the vertical vibration root mean square of weighed acceleration of chair top is emulated,
In, weighted value at different frequencies is
(4) with the two equivalent mass m of human upperb1And mb2And the equivalent mass m of human buttockhIdentification becomes as an optimization
Amount emulates obtained chair top vertical vibration root mean square of weighed acceleration using in previous time period [0, t1]
With testing measured chair top vertical vibration root mean square of weighed accelerationEquivalent three mass parameter of human body is established to distinguish
The object function J of knowledgemin, i.e.,
(5) according to the identification object function of equivalent three mass of human body, parameter identification object function is sought using optimization algorithm
Minimum value, optimized variable corresponding at this time are equivalent three matter of human body for recognizing obtained seat human body vibrating model
Amount, that is, the quality m of human buttockh, human upper two mass mb1And mb2；
(6) according to the Vibration Simulation model of seat body system and obtained equivalent three mass of human body of identification, with rear
One period [t1, T] in the vertical vibration acceleration signal of measured seat at cab floor installation site center
As input, carry out simulation calculation to the vertical vibration weighted acceleration value of chair top, and with it is measured within the period
The vertical vibration weighted acceleration value of chair top is compared, and to human body, the identification result of equivalent three mass is verified.
The present invention has the advantage that than the prior art：
The present invention can test obtained seat in cab floor according to seat body system's Vibration Simulation model is established
The vibration acceleration of vibration acceleration and chair top at installation center position utilizes the identification target letter of three mass parameter of human body
Number and optimization algorithm obtain equivalent three mass of human body；It can recognize to obtain more accurately and reliably human body equivalent three using this method
Quality improves the precision of the modeling of seat human body vibration and analysis, and the optimization design for seat suspension systematic parameter is established can
The basis leaned on；Meanwhile the present invention can avoid carrying out a large amount of sampling test, reduce testing expenses, shorten seat suspension system
Design and development cycle.
Description of the drawings
It is described further below in conjunction with the accompanying drawings for a better understanding of the present invention.
Fig. 1 is the identification flow chart of equivalent three mass of the human body of seat human body vibrating model；
Fig. 2 is the vertical vibration acceleration signal for testing the seat measured at cab floor installation site center；
Fig. 3 is the vertical vibration acceleration signal of chair top that experiment measures；
Fig. 4 is seat human body vertical direction vibration model；
Fig. 5 is the Simulink simulation models of seat human body vibration.
Specific embodiment
The present invention is described in further detail below by an embodiment.
Certain load-carrying vehicle seat system needs to meet the requirement of Analysis of Comfort and seat suspension systematic parameter optimization design
Equivalent three mass of human body of seat human body vibrating model is obtained, so as to be optimized to seat suspension.The known loading
In vehicle seat chair system, the equivalent stiffness K of seat suspensions=30317N/m and Equivalent damping coefficient Cs=1100Nm/s, seat cushion etc.
Imitate stiffness Kh=3412N/m and Equivalent damping coefficient Ch=674Nm/s, two equivalent stiffness of human upper are respectively Kb1=
2312N/m and Kb2=2543N/m, the two Equivalent damping coefficient C of human upperb1=900Nm/s and Cb2=1020Nm/s, seat
With seat cushion quality sum ms=20kg.The vehicle is travelled in highway with 80km/h speed, is collected by test
The vibration vibration damping acceleration of vibration acceleration and chair top of the seat at installation floor center is emulated using seat human body vibration
Model and parameter identification object function recognize equivalent three mass of the human body of the loading vehicle seats human body vibrating model.
The discrimination method of equivalent three mass of the human body of seat human body vibrating model that the embodiment of the present invention is provided, tool
Body step is as follows：
(1) using vibration test equipment, measure and collect the vehicle highway with 80km/h speed when driving,
The vertical vibration signal of vertical vibration signal and chair top of the seat at cab floor installation site center, respectively such as Fig. 2
Shown in Fig. 3, the time span of test acquisition signal is 130s, wherein, the vibration signal of previous time period [0,50s] is used for people
The equivalent three mass identification of body, the vibration signal of latter time period [50,130] can be used for the simulating, verifying to quality identification result；
(2) according to the requirement of seat system Analysis of Comfort, the equivalent stiffness K of seat suspension is utilizeds=30317N/m and
Equivalent damping coefficient Cs=1100Nm/s, the equivalent stiffness K of seat cushionh=3412N/m and Equivalent damping coefficient Ch=674Nm/s, people
Two equivalent stiffness on body top are respectively Kb1=2312N/m and Kb2=2543N/m, two Equivalent damping coefficients point of human upper
It Wei not Cb1=900Nm/s and Cb2=1020Nm/s and seat and seat cushion quality sum ms=20kg, seat human body is vertical shakes for structure
Movable model, as shown in Figure 4；
(3) according to seat body system's vertical direction vibration model, using Matlab/Simulink simulation softwares, seat is established
Body system's simulation model, as shown in figure 5, with the seat measured by previous time period [0,50s] in cab floor installation position
Vertical vibration acceleration signal at center is put as input signal, to the vertical vibration root mean square of weighed acceleration of chair top into
Row emulation, wherein, weighted value at different frequencies is
(4) with the two equivalent mass m of human upperb1And mb2And the equivalent mass m of human buttockhIdentification becomes as an optimization
Amount emulates obtained chair top vertical vibration root mean square of weighed acceleration using in previous time period [0,50s]
With testing measured chair top vertical vibration root mean square of weighed accelerationEstablish equivalent three matter of human body
Measure the object function J of parameter identificationmin, i.e.,
(5) according to the identification object function of three mass parameter of human body, parameter identification object function is sought using optimization algorithm
Minimum value, at this point, corresponding optimized variable is equivalent three matter of human body for recognizing obtained seat human body vibrating model
Amount, i.e. the quality m of human buttockh=12kg, the two mass m of human upperb1=20kg and mb2=29kg；
(6) equivalent three mass of human body obtained according to the Vibration Simulation model of seat body system and identification, with latter
Vertical vibration acceleration signal of the measured seat at cab floor installation site center in period [50,130s]
As input, simulation calculation is carried out to the vertical vibration weighted acceleration value of chair top；And with it is measured within the period
The vertical vibration weighted acceleration value of chair top is compared, wherein, the seat surface vibration in latter time period [50,130s]
The simulation value of weighted acceleration is 0.72m/s2, experimental test value is 0.73m/s2, the two deviation is only 0.01m/s2。
It is found that equivalent three mass of human body meets the analysis of seat manikin and seat suspension system obtained by identification
The requirement of Parameters Optimal Design shows that the discrimination method of equivalent three mass of human body of the seat human body vibrating model is correct
's.
Claims (1)
1. the discrimination method of equivalent three mass of the human body of seat human body vibrating model, is as follows：
(1) it using vibration test equipment, measures and collects the seat under certain driving cycle in cab floor installation position
Put the vertical vibration signal of the vertical vibration signal and chair top at center, acquire the time span of vibration signal for { 0, t }=
{[0,t1]+[t1, t] }, wherein, the preceding period [0, t1] vibration signal for the identification of human body equivalent three mass, rear period
[t1, t] vibration signal can be used for the simulating, verifying of quality identification result；
(2) according to the requirement of seat system Analysis of Comfort, using body mass as three equivalent mass, i.e., human body stern to be identified
Portion quality mh, human upper two mass mb1And mb2；Utilize the equivalent stiffness K of seat suspensionsWith Equivalent damping coefficient Cs, seat cushion
Equivalent stiffness KhWith Equivalent damping coefficient Ch, human upper two equivalent stiffness Kb1And Kb2, human upper two equivalent dampings
Coefficient Cb1And Cb2, seat and seat cushion quality sum ms, build seat human body vertical direction vibration model；
(3) according to seat body system's vertical direction vibration model, using Matlab/Simulink simulation softwares, seat human body is established
System simulation model, in the preceding period [0, t1] measured by Vertical Vibrating of the seat at cab floor installation site center
Dynamic acceleration signal is input signal, and the vertical vibration root mean square of weighed acceleration of chair top is emulated, wherein, not
Weighted value under same frequency is
(4) with the two equivalent mass m of human upperb1And mb2And the equivalent mass m of human buttockhVariable is recognized as an optimization, profit
Obtained chair top vertical vibration root mean square of weighed acceleration is emulated used in the preceding period [0, t1]With experiment institute
The chair top vertical vibration root mean square of weighed acceleration measuredEstablish the target of the equivalent three mass parameters identification of human body
Function Jmin, i.e.,
(5) according to the identification object function of three equivalent mass of human body, the minimum of parameter identification object function is sought using optimization algorithm
Value, optimized variable corresponding at this time are three equivalent mass of human body for recognizing obtained seat human body vibrating model,
That is the quality m of human buttockh, human upper two mass mb1And mb2；
(6) according to the Vibration Simulation model of seat body system and obtained equivalent three mass of human body of identification, in the rear time
Section [t1, t] in the vertical vibration acceleration signal of measured seat at cab floor installation site center as defeated
Enter, carry out simulation calculation to the vertical vibration weighted acceleration value of chair top, and with chair top measured within the period
Vertical vibration weighted acceleration value be compared, to human body, the identification result of equivalent three mass is verified.
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| CN105806574B (en) * | 2016-03-09 | 2018-09-25 | 航天科工防御技术研究试验中心 | A kind of determination method of vibration acceleration model based on dynamic stress rest |
| CN108363842B (en) * | 2018-01-25 | 2021-07-27 | 一汽-大众汽车有限公司 | Influence evaluation method and system based on seat R point Z value adjustment |
| CN112067222B (en) * | 2020-07-31 | 2022-10-28 | 北京工业大学 | Multi-degree-of-freedom vibration platform collaborative simulation detection method and detection system |
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Non-Patent Citations (4)
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| Modelling the fore-and-aft apparent mass of the human body and the transmissibility of seat backrests;Yi Qiu，Michael J. Griffin;《Vehicle System Dynamics》;20110531;第49卷(第5期);全文 * |
| 손인석，김정훈，강연준.시트-인체해석모델링과차량주행시험을통한차량승차감평가와시트지수의비교및분석.《Transactions of KSAE》.2009,第17卷(第4期), * |
| 汽车座椅主动振动控制与仿真分析;郑超;《万方数据知识服务平台》;20130427;第1-2章 * |
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Inventor after: Zhou Changcheng Inventor after: Cheng Zhengwu Inventor after: Zhao Leilei Inventor after: Liu Congzhen Inventor after: Pan Lijun Inventor before: Cheng Zhengwu Inventor before: Zhou Changcheng Inventor before: Zhao Leilei Inventor before: Liu Congzhen Inventor before: Pan Lijun |
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