CN110426201A - Slip clutch transient temperature measuring method and device based on six parameter models - Google Patents
Slip clutch transient temperature measuring method and device based on six parameter models Download PDFInfo
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- CN110426201A CN110426201A CN201910680314.3A CN201910680314A CN110426201A CN 110426201 A CN110426201 A CN 110426201A CN 201910680314 A CN201910680314 A CN 201910680314A CN 110426201 A CN110426201 A CN 110426201A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/022—Power-transmitting couplings or clutches
Abstract
The slip clutch transient temperature measuring method and device based on six parameter models that the present invention relates to a kind of, this method replaces two parameter models using six parameter models, real time environment temperature, initial temperature and rotational speed difference based on acquisition are iterated calculating to clutch transient temperature, in six parameter models, temperature rise coefficient and coefficient of heat transfer are replaced with using environment temperature and unit friction power as the linear function of the Zonal Constant item of variable.Compared with prior art, the present invention, which has, both considers the frictional heat generation fact related with clutch radius, obtained model is when compared with actual conditions, it is more more accurate than master mould, have found the model parameter (temperature rise coefficient and coefficient of heat transfer) and environment temperature, the linear relationship of unit friction power of model used, and bring this relationship in two parameter models into, so that the adaptability for working condition of improved model is more preferable；And compared to four parameter model, due to the addition of constant term, the integrality of model is supplemented, and precision is compared to higher.
Description
Technical field
The present invention relates to a kind of slip clutch transient temperature measuring methods, are based on six parameter moulds more particularly, to one kind
The slip clutch transient temperature measuring method and device of type.
Background technique
Friction clutch is one of important component of marine propulsion shafting, it utilizes the mechanical friction between rubbing surface,
Torque is passed to driven shaft by driving shaft, and host can be made to engage or disengage with driven shaft according to need of work.With frictional
For clutch uses most DCT gearboxes, full name is double-clutch automatic gearbox, by gear-box and two sets of clutch groups
At less, manufacturing cost is cheap, and DCT gearbox is both dynamic with manual transmission for building block and manual transmission difference
Power transmission efficiency is high, and the good advantage of fuel economy has the advantages that automatic transmission gear shift ride comfort is good again, be performance extremely
A kind of outstanding gearbox.But DCT gearbox, especially dry type DCT, have the shortcomings that temperature rise is excessively high, so to dry type
It is current urgent problem to be solved that DCT, which carries out real time temperature control,.
Existing clutch transient temperature can be calculated by two parameter model of temperature field, the two parameters (temperature in existing model
Rising coefficient and coefficient of heat transfer) value changes as operating condition changes, therefore generallys use finite element temperature computation method, there is calculating
The disadvantages of memory is big, speed is slow.
Summary of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide one kind to be based on six parameter moulds
The slip clutch transient temperature measuring method and device of type.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of slip clutch transient temperature measuring method based on six parameter models, this method use six parameter models
Instead of two parameter models, real time environment temperature, initial temperature and rotational speed difference based on acquisition change to clutch transient temperature
In generation, calculates, and in six parameter model, temperature rise coefficient and coefficient of heat transfer are replaced with environment temperature and unit friction power as change
The linear function of the Zonal Constant item of amount.
It is linear relationship, the coefficient of heat transfer and environment temperature between the temperature rise coefficient and environment temperature and unit friction power
It is linear relationship between unit friction power.
The six parameter models expression formula are as follows:
Wherein, T(i)For i-th of discrete time node temperature, Δ t is time discretization, F(i)For i-th of discrete time section
Point clutch compressing disc pressing force, ω(i)For the rotational speed difference of i-th discrete time node clutch drive end and driven end, T∞For ring
Border temperature, P are unit friction power,For the first proportionality coefficient,For the second proportionality coefficient,For first constant item,It is
Three proportionality coefficients,For the 4th proportionality coefficient,For second constant item.
First proportionality coefficient, the second proportionality coefficient, third proportionality coefficient, the 4th proportionality coefficient, first constant item and
The recognition methods of second constant item is least square method.
The least square method is realized using the 1sqnonlin nonlinear fitting function in MATLAB.
The initial value of each proportionality coefficient is the average value of corresponding numerical value bound.
First proportionality coefficient, the second proportionality coefficient, third proportionality coefficient, the 4th proportionality coefficient, first constant item and
Second constant item method are as follows: six parameter models are inputted by lookup module in MATLAB and are iterated calculating, input for from
The rotational speed difference of clutch and the sliding torque that rubs, export the difference of the calculated result and experimental result for model, when meeting termination condition,
Stop iteration, exports the optimal value of each proportionality coefficient, when being unsatisfactory for termination condition, reselect each scalefactor value and counted
It calculates, until meeting termination condition.
The slip clutch transient temperature calculation method based on six parameter models, which is characterized in that the end
Only condition includes the knots modification of the variance of the variable quantity of coefficient to be optimized, the model calculation and experimental result and time of iteration
Number.
A kind of slip clutch transient temperature measuring apparatus based on six parameter models, comprising:
Sensor group, for acquiring real time environment temperature, initial temperature and rotational speed difference；
Controller is connect with sensor group, replaces two parameter models, the real time environment based on acquisition using six parameter models
Temperature, initial temperature and rotational speed difference are iterated calculating to clutch transient temperature, in six parameter model, temperature rise coefficient and
Coefficient of heat transfer is replaced with using environment temperature and unit friction power as the linear function of the Zonal Constant item of variable.
Compared with prior art, the invention has the following advantages:
(1) compared with two parameter models, the frictional heat generation fact related with clutch radius, obtained model had both been considered
It is more more accurate than master mould when compared with actual conditions, it was found that model parameter (temperature rise coefficient and the heat dissipation system of model used
Number) and environment temperature, the linear relationship of unit friction power, and this relationship is brought into two parameter models, so that improved model
Adaptability for working condition is more preferable；Two as temperature rise coefficient and dissipate compared to four parameter model, six parameter models supplemented with two constant terms
The compensation of hot coefficient, to realize higher Temperature Prediction precision.
(2) compared with finite element temperature computation method, the calculating memory of occupancy is smaller, and faster, precision improves calculating speed.
(3) each proportionality coefficient is optimized using the lookup module in MATLAB, improves model accuracy.
Detailed description of the invention
Fig. 1 is parameter identification process figure in the present embodiment；
Fig. 2 is parameter optimization flow chart in the present embodiment.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, the detailed implementation method and specific operation process are given, but protection scope of the present invention is not limited to
Following embodiments.
A kind of six parameter models in more accurate description slip clutch temperature field are present embodiments provided, precision is more
Height, operating condition adaptability is stronger, rapid reaction.It can be used for clutch accurate temperature to calculate in adjustment related to control strategy.
This method realized by computer system in the form of a computer program, specific device, comprising:
Sensor group, for acquiring real time environment temperature, initial temperature and rotational speed difference；
Controller is connect with sensor group, replaces two parameter models, the real time environment based on acquisition using six parameter models
Temperature, initial temperature and rotational speed difference are iterated calculating to clutch transient temperature, in six parameter model, temperature rise coefficient and
Coefficient of heat transfer is replaced with using environment temperature and unit friction power as the linear function of the Zonal Constant item of variable.
Method flow includes:
1) parameter identification is carried out at a temperature of specific environment to the clutch of certain certain fixing model, acquires model preset parameterAnd then the six parameters of temperature models determined are iterative.
2) model is added in clutch temp control strategy, the real time environment temperature that measures according to sensor, starting
The information such as temperature, rotational speed difference, bring into 1) obtained in determine it is iterative calculated, obtain clutch main body temperature, and according to
Control strategy carries out the operations such as necessary cooling, protects clutch, improves its working performance.
Six parameter model expression formulas are as follows:
Wherein, T(i)For i-th of discrete time node temperature, Δ t is time discretization, F(i)For i-th of discrete time section
Point clutch compressing disc pressing force, ω(i)For the rotational speed difference of i-th discrete time node clutch drive end and driven end, T∞For ring
Border temperature, P are unit friction power,For the first proportionality coefficient,For the second proportionality coefficient,For first constant item,It is
Three proportionality coefficients,For the 4th proportionality coefficient,For second constant item.
The improvement of the model is that the function of use environment temperature and unit friction power substitutes the temperature rise system of two parameter models
Several and coefficient of heat transfer, it may be assumed that
k1、k2Respectively temperature rise coefficient and coefficient of heat transfer.
Master mould acquires k by carrying out parameter identification under a certain operating condition1、k2, but pass through experimental verification, which exists
Practicability is very poor under different operating conditions, error lead to not using.By linear analysis, it was found that two coefficients and environment temperature
Linear relationship between degree, unit friction power.
Therefore, the present embodiment is by experiment gained temperature rise coefficient k1With coefficient of heat transfer k2The line of same environment temperature, unit friction power
Property functional relation, the model parameter in former two parameter model of temperature field is substituted using environment temperature.Script is solved k by model1、k2
The problem of become solving their proportionality coefficients between environment temperature, unit friction power
The problem of, including parameter identification process and optimization process, it is specific as follows:
Fig. 1 is parameter identification process, since dry clutch parameter to be identified does not have specific physical significance, so nothing
Method rule of thumb provides the range of parameter, can be more wide in range by the setting of the bound of parameter, if falling into a trap in parameter identification process
It calculates and stops, the reason is that since parameter is beyond given range, then according to termination the reason is that being more than that the upper limit or lower limit give ginseng again
Several upper lower limit values.The initial value of parameter time needed for true value then parameter identification is shorter, since four parameters do not have
Specific physical significance, so the value of four parameters to be set as to the average value of parameter bound in our current research.
The parameter identification process of dry clutch temperature model refers to really with constrained optimization process with constraint
Given parameter area.This research completes parameter identification, principle using the 1sqnonlin nonlinear fitting function in MATLAB
It is least square method, is constantly changing the value of parameter to be identified to find suitable parameter value and makes having identical input
Under conditions of value, the calculated result of model and the variance of experimental result are minimum.
Fig. 2 is optimization process.Initialization refers to the range for setting parameter to be identified and assigns initial value for parameter to be identified；It adjusts
Simulink model refers to improved temperature model, and input is the rotational speed difference of clutch, the sliding torque that rubs, by MATLAB
Lookup module input model, output is the calculated result of model and the difference of experimental result.When meeting termination condition, stop
Only iteration, output parameter value then reselect parameter value when being unsatisfactory for termination condition and are calculated until meeting termination condition
Output parameter value.Here termination condition includes the variance of the variable quantity of parameter to be identified, the model calculation and experimental result
Knots modification and iteration number.
The present embodiment and existing model are compared, specific as follows:
Two parameter model application methods carry out parameter identification to model first.Parameter identification refers in the mathematics having built up
Under the premise of model, experimental data is substituted into, the unknown parameter in model is acquired, so that the output result of model and experimental result are most
It measures identical.Multiple groups experiment condition is chosen when experiment altogether.Optional one group of experimental data substitutes into model and carries out in these operating conditions
Parameter identification.Heating coefficient and coefficient of temperature drop have been obtained by iterative calculation.By parameter recognition result and rig test result phase
Compare, it is almost the same, illustrate credible result.Same method finds out the k under other ten groups of operating conditions1、k2Value.
The model parameter k that data under the different operating conditions known to upper step result identify1And k2It is different, i.e., a kind of work
Model parameter under condition is not particularly suited for other operating conditions, then just needing to identify that the parameter value under very multi-state could use two ginsengs
Number temperature model carries out real time temperature prediction, but every kind of operating condition will carry out parameter and identify to obtain the specific parameter value of the operating condition
It is clearly unpractical.
It is similar with master mould using six parameter model methods.But the object of parameter identification is by k1And k2Value becomes Repetition parameter identification process takes and identifies under a certain operating condition Fixed model parameter of the value as six parameters of temperature models.With the experimental result (clutch under different operating conditions
Device measuring point temperature) it is compared with the calculated result of six parameters of temperature models, pass through analysis model calculated result and experimental result
Absolute error and relative error the precision of model is compared, it is found that its maximum absolute error is 1.5 DEG C, it is maximum opposite accidentally
Difference is 1.3%, is improved to some extent compared to two parameter model precision.Different operating conditions still above method can be used to acquire temperature field information,
The temperature of clutch is controlled to come true.
In contrast, the maximum absolute error of two parameters of temperature the model calculations is 17 DEG C, and maximum relative error is
16%, illustrate that the computational accuracy of six parameters of temperature models increases really.
The Applicant declares that this model illustrates the correctness and applicability of this model by above-mentioned experiment, but the present invention is simultaneously
It is not limited to aforesaid operations step, that is, does not mean that the present invention must rely on aforesaid operations step and could implement.Affiliated technology neck
The technical staff in domain is it will be clearly understood that any improvement in the present invention, the selection etc. of concrete mode all fall within protection model of the invention
Enclose within the open scope.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (10)
1. a kind of slip clutch transient temperature measuring method based on six parameter models, which is characterized in that this method uses
Six parameter models replace two parameter models, and real time environment temperature, initial temperature and rotational speed difference based on acquisition are to clutch transient state
Temperature is iterated calculating, and in six parameter model, temperature rise coefficient and coefficient of heat transfer are replaced with environment temperature and cunning
The power that rubs is the linear function of the Zonal Constant item of variable.
2. a kind of slip clutch transient temperature measuring method based on six parameter models according to claim 1,
It is characterized in that, is linear relationship, the coefficient of heat transfer and environment temperature between the temperature rise coefficient and environment temperature and unit friction power
It is linear relationship between degree and unit friction power.
3. a kind of slip clutch transient temperature measuring method based on six parameter models according to claim 1,
It is characterized in that, the six parameter models expression formula are as follows:
Wherein, T(i)For i-th of discrete time node temperature, Δ t is time discretization, F(i)For i-th of discrete time node from
Clutch platen pressing force, ω(i)For the rotational speed difference of i-th discrete time node clutch drive end and driven end, T∞For environment temperature
Degree, P is unit friction power,For the first proportionality coefficient,For the second proportionality coefficient,For first constant item,For third ratio
Example coefficient,For the 4th proportionality coefficient,For second constant item.
4. a kind of slip clutch transient temperature measuring method based on six parameter models according to claim 1,
Be characterized in that, first proportionality coefficient, the second proportionality coefficient, third proportionality coefficient, the 4th proportionality coefficient, first constant item and
The recognition methods of second constant item is least square method.
5. a kind of slip clutch transient temperature measuring method based on six parameter models according to claim 4,
It is characterized in that, the least square method is realized using the 1sqnonlin nonlinear fitting function in MATLAB.
6. a kind of slip clutch transient temperature measuring method based on six parameter models according to claim 5,
It is characterized in that, the initial value of each proportionality coefficient is the average value of corresponding numerical value bound.
7. a kind of slip clutch transient temperature measuring method based on six parameter models according to claim 1,
Be characterized in that, first proportionality coefficient, the second proportionality coefficient, third proportionality coefficient, the 4th proportionality coefficient, first constant item and
Second constant item method are as follows: six parameter models are inputted by lookup module in MATLAB and are iterated calculating, input for from
The rotational speed difference of clutch and the sliding torque that rubs, export the difference of the calculated result and experimental result for model, when meeting termination condition,
Stop iteration, exports the optimal value of each proportionality coefficient, when being unsatisfactory for termination condition, reselect each scalefactor value and counted
It calculates, until meeting termination condition.
8. a kind of slip clutch transient temperature measuring method based on six parameter models according to claim 7,
It is characterized in that, the slip clutch transient temperature calculation method based on six parameter models, which is characterized in that the end
Only condition includes the knots modification of the variance of the variable quantity of coefficient to be optimized, the model calculation and experimental result and time of iteration
Number.
9. a kind of slip clutch transient temperature measuring apparatus based on six parameter models characterized by comprising
Sensor group, for acquiring real time environment temperature, initial temperature and rotational speed difference；
Controller is connect with sensor group, replaces two parameter models, the real time environment temperature based on acquisition using six parameter models
Degree, initial temperature and rotational speed difference are iterated calculatings to clutch transient temperature, in six parameter model, temperature rise coefficient and scattered
Hot coefficient is replaced with using environment temperature and unit friction power as the linear function of the Zonal Constant item of variable.
10. a kind of slip clutch transient temperature measuring apparatus based on six parameter models according to claim 9,
It is characterized in that, the six parameter models expression formula are as follows:
Wherein, T(i)For i-th of discrete time node temperature, Δ t is time discretization, F(i)For i-th of discrete time node from
Clutch platen pressing force, ω(i)For the rotational speed difference of i-th discrete time node clutch drive end and driven end, T∞For environment temperature
Degree, P is unit friction power,For the first proportionality coefficient,For the second proportionality coefficient,For first constant item,For third
Proportionality coefficient,For the 4th proportionality coefficient,For second constant item.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113312763A (en) * | 2021-05-19 | 2021-08-27 | 上海交通大学 | Method and device for acquiring pressure distribution of clutch by adopting dimensionless parameters |
| CN116771817A (en) * | 2023-08-24 | 2023-09-19 | 盛瑞传动股份有限公司 | Control method, device and equipment for gearbox and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235441A (en) * | 2010-04-20 | 2011-11-09 | 通用汽车环球科技运作公司 | Method and apparatus for dry clutch temperature prediction in a dct |
| CN103967963A (en) * | 2014-05-21 | 2014-08-06 | 合肥工业大学 | Method for measuring temperature of DCT wet clutches on basis of neural network prediction |
| CN106678213A (en) * | 2016-11-10 | 2017-05-17 | 广州汽车集团股份有限公司 | Temperature real-time monitoring method and device for wet double clutch transmission |
| CN108343733A (en) * | 2018-02-13 | 2018-07-31 | 重庆长安汽车股份有限公司 | A kind of the clutch temp control method and system of wet type DCT |
| CN109977566A (en) * | 2019-03-29 | 2019-07-05 | 上海理工大学 | A kind of friction of wet clutch heat exchange coefficient mathematical model construction method |
-
2019
- 2019-07-26 CN CN201910680314.3A patent/CN110426201A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235441A (en) * | 2010-04-20 | 2011-11-09 | 通用汽车环球科技运作公司 | Method and apparatus for dry clutch temperature prediction in a dct |
| CN103967963A (en) * | 2014-05-21 | 2014-08-06 | 合肥工业大学 | Method for measuring temperature of DCT wet clutches on basis of neural network prediction |
| CN106678213A (en) * | 2016-11-10 | 2017-05-17 | 广州汽车集团股份有限公司 | Temperature real-time monitoring method and device for wet double clutch transmission |
| CN108343733A (en) * | 2018-02-13 | 2018-07-31 | 重庆长安汽车股份有限公司 | A kind of the clutch temp control method and system of wet type DCT |
| CN109977566A (en) * | 2019-03-29 | 2019-07-05 | 上海理工大学 | A kind of friction of wet clutch heat exchange coefficient mathematical model construction method |
Non-Patent Citations (2)
| Title |
|---|
| 任飞多等: "基于热学原理的干式双离合器实时温度模型的建模与试验验证", 《传动技术》 * |
| 郑鹏飞等: "干式DCT主离合器的二参数温度模型研究", 《汽车工程》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113312763A (en) * | 2021-05-19 | 2021-08-27 | 上海交通大学 | Method and device for acquiring pressure distribution of clutch by adopting dimensionless parameters |
| CN113312763B (en) * | 2021-05-19 | 2023-03-03 | 上海交通大学 | Method and device for acquiring pressure distribution of clutch by adopting dimensionless parameters |
| CN116771817A (en) * | 2023-08-24 | 2023-09-19 | 盛瑞传动股份有限公司 | Control method, device and equipment for gearbox and storage medium |
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Address after: 200030 Dongchuan Road, Minhang District, Minhang District, Shanghai Applicant after: Shanghai Jiaotong University Address before: 200030 Huashan Road, Shanghai, No. 1954, No. Applicant before: Shanghai Jiaotong University |
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Application publication date: 20191108 |