CN114491870B - Transmission system efficiency estimation method and device and storage medium - Google Patents
Transmission system efficiency estimation method and device and storage medium Download PDFInfo
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Abstract
The invention discloses a transmission system efficiency estimation method and device and a storage medium, comprising the following steps: dividing loss type components to obtain relative loss components and absolute loss components; carrying out power flow analysis on the relative loss component and the absolute loss component according to the power flow output by the engine to obtain the loss power of the relative loss component and the absolute loss component; and calculating the efficiency of the parts according to the loss power of the loss parts and the loss power of the absolute loss parts to obtain the total efficiency of the transmission system. By adopting the technical scheme of the invention, the efficiency estimation combining the test data of each part of the transmission system and theoretical calculation can be realized, and the method has the characteristic of accurate efficiency estimation.
Description
Technical Field
The invention belongs to the technical field of vehicle transmission, and particularly relates to a transmission system efficiency estimation method and device and a storage medium.
Background
Efficiency is one of important parameters of service performance of a transmission system, the economy of a vehicle is influenced due to the fact that the efficiency of the transmission system is too low, the power loss caused by the efficiency of the transmission system can cause waste of output power of an engine and increase of oil temperature, the working efficiency and the service life of a transmission part are influenced, and the performance of the whole vehicle is further influenced. However, current efficiency estimation methods are often limited to the study of only a single component, taking component efficiencies to a fixed value in estimating overall driveline efficiency, without taking into account the differences in relative and absolute losses, and the use of such differences in driveline power flow analysis. Moreover, different components have different parameters affecting efficiency and loss, and measurable parameters are different, so that the conventional efficiency estimation method cannot combine test data of each component of the transmission system with theoretical calculation, and has limitation.
Disclosure of Invention
Aiming at the influence of the difference of test data of parts on the efficiency of a transmission system, the invention provides a method and a device for estimating the efficiency of the transmission system and a storage medium.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method of estimating driveline efficiency, comprising the steps of:
step S1, dividing loss type components to obtain relative loss components and absolute loss components;
step S2, carrying out power flow analysis on the relative loss component and the absolute loss component according to the power flow output by the engine to obtain the loss power of the relative loss component and the absolute loss component;
and step S3, calculating the efficiency of the components according to the loss power of the loss components and the loss power of the absolute loss components to obtain the total efficiency of the transmission system.
Preferably, the relative loss means includes: the transmission comprises a front transmission, a steering pump motor, an auxiliary transmission, a left/right side cover bus bar, a hydraulic torque converter, a middle bracket, a fan transmission and a planetary speed change mechanism.
Preferably, the absolute loss element includes: the hydraulic viscous speed reducer, the hydraulic viscous clutch, the oil pump set, the steering servo pump and the planetary speed change mechanism.
Preferably, the power output by the engine is divided into five paths after being subjected to front transmission, and the five paths sequentially comprise from top to bottom: diversion branch, variable speed branch, fan path and oil pumpA group and steering servo pump; in the straight-driving mechanical mode, the steering branch does not work, namely the power loss of a steering pump motor and a steering servo pump is 0; the power loss of the hydraulic torque converter is 0; setting the output power P of the engine d ，
Power flow analysis of front drive:
the output power through the front transmission is: p qcd ＝P d η qcd Wherein η qcd Front drive efficiency;
power flow analysis of the shunt calculation:
front transmission output power P qcd The system is divided into a fan path, an oil pump set and a variable speed branch path; power loss P of fan circuit s1 Comprises the following steps: p s1 ＝P ynlhq Wherein, P ynlhq Belt loss for a hydro-viscous clutch; power loss P of oil pump set s2 Comprises the following steps: p s2 ＝P ybz Wherein, P ybz The power loss of an oil pump group related to the vehicle loading under a specific working condition; the power input to the variable speed branch is: p bs ＝P qcd -P s1 -P s2 ；
Power flow analysis of the planetary transmission mechanism:
the power after passing through the planetary speed change mechanism is as follows: p xx ＝η xx P bs -P dp Wherein η xx For planetary gear train efficiency, P dp The planetary speed change mechanism is provided with row loss;
analyzing the power flow of the hydro-viscous speed reducer:
the power after passing through the hydro-viscous reducer is as follows: p is js ＝P xx -P ynjsq Wherein, P ynjsq Power loss for the hydro-viscous retarder;
power flow analysis of left/right side cover buss bars:
the power after passing through the left and right bus bars is as follows: p out ＝η hl P js -P jy Wherein η hl For left and right bus bar efficiency, P jy Churning losses for the drive train.
Preferably, the components involved in the power flow are divided into sections containing test dataParts and parts without test data; the components containing the test data include: preceding transmission, planet speed change mechanism and oil pump group, the part that does not contain the test data includes: the left/right side cover bus bar, the hydro-viscous speed reducer and the hydro-viscous clutch; calculating the efficiency of the part by fitting the test data to the curved surface of the part containing the test data, and calculating the efficiency of the part by theory for the part without the test data; the total efficiency eta of the transmission system is obtained by the following formula according to the efficiency of the transmission system containing the test data component and the efficiency of the transmission system without the test data component ch ，
Preferably, the calculating the component efficiency by fitting the test data to the curved surface of the component containing the test data is specifically: judging whether the given rotating speed and load are in the range of the test data, and if so, directly adopting the efficiency of the point in the test data; if not, fitting the test data to a polynomial by a polynomial fitting method, namely:
η＝p 00 +p 10 x+p 01 y+p 20 x 2 +p 11 xy+p 02 y 2 +p 30 x 3 +p 21 x 2 y+p 12 xy 2 +p 40 x 4 +p 31 x 3 y+p 22 x 2 y 2 +p 50 x 5 +p 41 x 4 y+p 32 x 3 y 2
where eta is the efficiency, p ij All are fitting coefficients, i is 0,1,2,3,4,5, j is 0,1,2, x and y represent rotation speed and load, respectively;
if the fitted efficiency value is not in the reasonable value range, fitting is carried out again, and the fitting coefficient is modified; and if the fitting result still does not meet the condition, increasing the fitting precision until the fitting result meets the value range.
The present invention also provides a transmission system efficiency estimation device, including:
the dividing module is used for dividing loss type components to obtain relative loss components and absolute loss components;
the analysis module is used for carrying out power flow analysis on the relative loss component and the absolute loss component according to the power flow output by the engine to obtain the loss power of the relative loss component and the absolute loss component;
and the calculating module is used for evaluating and calculating the efficiency of the components according to the loss power of the loss components and the loss power of the absolute loss components to obtain the total efficiency of the transmission system.
Preferably, the relative loss means includes: the device comprises a front transmission, a steering pump motor, an auxiliary transmission, a left/right side cover bus bar, a hydraulic torque converter, a middle bracket, a fan transmission and a planetary speed change mechanism; the absolute loss component includes: the hydraulic viscous speed reducer, the hydraulic viscous clutch, the oil pump set, the steering servo pump and the planetary speed change mechanism.
The present invention also provides a storage medium having stored thereon machine-executable instructions that, when invoked and executed by a processor, cause the processor to implement a driveline efficiency estimation method.
1. The invention applies a power flow analysis method, divides the power loss into relative loss and absolute loss, and can research the loss of a single part and apply the loss to the efficiency estimation of the whole transmission system. And the universality of various transmission system types is realized, and a foundation is laid for the concept design and scheme design of the transmission system design stage.
2. The invention can adopt a method of combining test data and theoretical calculation according to the difference of measurable parameters of different components, not only can improve the precision along with the increase of the test data, but also can expand the range of efficiency calculation so as to estimate the efficiency of the transmission system, and has the advantage of high estimation precision.
Drawings
FIG. 1 is a flow chart of a method of estimating driveline efficiency according to the present invention;
FIG. 2 is a schematic diagram of power flow;
FIG. 3 is a flowchart of a component efficiency evaluation calculation;
FIG. 4 is a hydro-viscous clutch input interface;
FIG. 5 is a front drive fit surface;
fig. 6 is a block diagram of a drive train efficiency estimation apparatus of the present invention.
Detailed Description
For better illustrating the objects and advantages of the present invention, the following description is provided in conjunction with the accompanying drawings and examples.
Example 1:
as shown in FIG. 1, the present invention provides a method for estimating the efficiency of a transmission system, comprising the steps of:
step S1, dividing loss type component
The components are classified into a relative loss component and an absolute loss component according to the power loss type.
The power losses of the driveline components are divided into two categories: relative loss and absolute loss. The relative loss is efficiency, and is related to the input quantity, and the power loss is calculated by the input power and the relative loss.
P s ＝P i (1-η) (1)
Wherein, P s For power loss, P i For input power, η is the relative loss, i.e., efficiency. In an integrated drive train, the relative loss components include: the front transmission, the steering pump motor, the auxiliary transmission, the left/right side cover bus bar, the hydraulic torque converter, the middle bracket and the fan transmission.
The absolute loss is a power loss of the component itself, and does not change with a change in input/output conditions, and the efficiency is 0. The absolute loss component includes: the hydraulic viscous speed reducer, the hydraulic viscous clutch, the oil pump set and the steering servo pump. There are both relative and absolute losses in the planetary transmission mechanism.
Step S2, Power flow analysis
The transmission power flow analysis is shown in FIG. 2. The power output by the engine is divided into five paths after being subjected to front transmission, and the five paths are sequentially from top to bottom: the oil pump comprises a steering branch, a variable speed branch, a fan path, an oil pump group and a steering servo pump.
The integrated drive train includes multiple operating modes, with different operating modes involving different components and power flow directions.
In the straight-driving mechanical mode, the steering branch is not operated, namely the power loss of the steering pump motor and the steering servo pump is 0, and the auxiliary transmission is not operated. The torque converter is locked in the mechanical mode, i.e. the torque converter power loss is 0. Meanwhile, the fan is not installed in the whole vehicle test bed, and the middle support and the fan do not work in transmission, so that only the belt exhaust loss of the hydro-viscous clutch exists in a fan path.
Setting the output power P of the engine d ，
2.1 front drive
The front drive is a relatively lossy component, with losses reflected in efficiency. The output power through the front drive is then:
P qcd ＝P d η qcd (2)
wherein eta is qcd For forward drive efficiency.
2.2 shunt calculation
Front transmission output power P qcd The method is divided into 3 paths: fan way, oil pump group and variable speed branch. Wherein:
2.1.1 Fan route
When the fan is not installed on the test bed, the fan path only has the belt exhaust loss of the hydro-viscous clutch. The hydro-viscous clutch is an absolute loss component, and the loss is independent of input and output. The fan path power loss is:
P s1 ＝P ynlhq (3)
wherein P is ynlhq Belt losses for the hydro-viscous clutch.
2.1.2 oil Pump Unit
The oil pump group is an absolute loss component, and the power loss is P s2 Comprises the following steps:
P s2 ＝P ybz wherein P is ybz The power loss of the oil pump set related to the vehicle loading under a specific working condition.
2.1.3 Shift Branch
The power input to the variable speed branch is the power obtained by subtracting the power of the fan circuit and the oil pump set from the power output by the front transmission:
P bs ＝P qcd -P s1 -P s2 (4)
2.3 Shift shunt calculation
2.1.4 planetary speed change mechanism
Both the relative loss and the belt-row loss of the shifting clutch exist in the planetary speed change mechanism, and the loss is expressed as absolute loss. The power after the planetary transmission mechanism can be expressed as:
P xx ＝η xx P bs -P dp (5)
wherein eta xx For planetary gear train efficiency, P dp With row losses for the planetary transmission.
2.1.5 hydroviscous speed reducer
The hydro-viscous speed reducer is an absolute loss component, and the power after passing through the hydro-viscous speed reducer is as follows:
P js ＝P xx -P ynjsq (6)
wherein, P ynjsq Losing power for the hydro-viscous retarder.
2.1.6 left/right side cover bus bars
The busbar is relative loss part, and the power after the both sides busbar is:
P out ＝η hl P js -P jy (7)
wherein eta is hl For left and right bus bar efficiency, P jy Churning losses for the drive train.
2.4 Transmission Total efficiency calculation
The above formulas are combined, and the total efficiency is obtained by solving the following steps:
step S3, evaluation calculation of component efficiency, as shown in FIG. 3
3.1 component classification according to test data
The components involved in the power flow are divided into two classes, one containing test data and one not. The efficiency of the former is calculated by fitting a curved surface with experimental data, and the latter is calculated by using theory.
Taking the straight-driving mechanical mode as an example, the components containing the test data include: preceding transmission, planetary gear mechanism and oil pump group, the part that does not contain test data includes: the left/right side cover bus bars, the hydro-viscous speed reducer and the hydro-viscous clutch.
3.2 theoretical calculation of parts
When the part does not contain test data, a theoretical formula can be used for calculation. The calculation formulas and parameters are shown in table 1.
TABLE 1 theoretical calculation of parts
The desired parameters may be set or derived from given operating conditions.
3.3 calculation of part test data
When a part contains test data, it is first considered to evaluate its efficiency using test data calculations.
The efficiency of the components in the test data may be related to the rotational speed and load factors of the components. Firstly, judging whether a given rotating speed and a given load are in a test data range, and if so, directly adopting the efficiency of the point in the test data; if not, fitting the test data to a polynomial by a polynomial fitting method, wherein the form is shown in formula (9):
wherein p is ij Both fitting coefficients, x and y represent two variables, e.g. rotational speed and load, respectively.
And if the fitted efficiency value is not in the reasonable value range, fitting again, and modifying the fitting coefficient. And if the fitting result still does not meet the condition, increasing the fitting precision until the value range is met.
And (4) substituting the efficiency calculated in the step (3.2) and the step (3.3) into a formula (8), so that the efficiency estimation of the transmission system based on the test data and theoretical calculation can be realized.
Example 2:
and selecting a certain vehicle as an example, and selecting a straight-driving mechanical six-gear as a use condition. The method for estimating the efficiency of the transmission system based on the test data disclosed by the embodiment comprises the following specific implementation steps of:
the method comprises the following steps: component partitioning for different loss types
In the straight-driving mechanical six-gear operating mode, the relative loss components mainly comprise a front transmission and left/right side cover busbars. The absolute loss component includes: the hydraulic viscous speed reducer, the hydraulic viscous clutch and the oil pump set. There are both relative and absolute losses in the planetary transmission mechanism.
Step two: power flow analysis
The overall efficiency of the transmission system is:
wherein eta is hl For bus efficiency; eta xx The planetary variator efficiency; p d Outputting power for the engine; eta qcd Front drive efficiency; p s1 Loss of power for the fan path; p s2 Is the power loss of the oil pump set; p dp Power is lost for the bank; p ynjsq Is the power loss of the hydro-viscous reducer; p jy Power is lost to churn.
Step three: part efficiency evaluation calculation
Theoretical calculation of parts
The formula in table 1 is written into the program and the parameters in table 1 are used as input parameters of the program. The input interface of a hydro-viscous reducer, for example, is shown in fig. 4.
Solving to obtain the power loss P of the hydro-viscous speed reducer ynjsq 0.19kW, hydro-viscous clutch power loss P ynlhq 11.01kW, left/right side cover bus bar efficiency η hl 81.66%, loss of belt row P dp 11.01kW, oil churning loss P jy ＝0.49kW
Part test data calculation
Firstly, judging whether the given working condition parameters such as rotating speed, load and the like are in the range of test data, and if so, directly adopting the efficiency of the point in the test data; if not, fitting the test data into a polynomial by using a polynomial fitting method. The experimental data and the fitting curves are shown in fig. 5, taking the previous drive as an example.
The fitting formula is shown as formula (11):
wherein x and y represent rotational speed and load respectively, and the fitting coefficient values are shown in table 2:
TABLE 2 fitting coefficients
| p 00 | 0.830 | p 02 | -0.009 | p 31 | 0.004 |
| p 10 | -0.040 | p 30 | -0.010 | p 22 | 0.009 |
| p 01 | 0.048 | p 21 | 0.011 | p 50 | 0.005 |
| p 20 | -0.012 | p 12 | 0.003 | p 41 | -0.003 |
| p 11 | 0.012 | p 40 | 0.004 | p 32 | -0.001 |
Similarly, the transmission efficiency is eta before the solution qcd 0.9604; efficiency eta of planetary speed-changing mechanism xx 0.9224; power loss P of oil pump set s2 ＝11.96kW。
Substituting into equation (10), the total efficiency of the transmission system is 54.56%, which is consistent with the actual situation. The transmission system efficiency estimated by the embodiment is feasible, the universality of various transmission system types can be realized, and the advantage of high estimation precision is achieved.
Example 3:
as shown in fig. 6, the present invention also provides a transmission system efficiency estimation apparatus, including:
the dividing module is used for dividing loss type components to obtain relative loss components and absolute loss components;
the analysis module is used for carrying out power flow analysis on the relative loss component and the absolute loss component according to the power flow output by the engine to obtain the loss power of the relative loss component and the absolute loss component;
and the calculating module is used for evaluating and calculating the efficiency of the components according to the loss power of the loss components and the loss power of the absolute loss components to obtain the total efficiency of the transmission system.
As an implementation of the embodiment of the present invention, the relative loss component includes: the device comprises a front transmission, a steering pump motor, an auxiliary transmission, a left/right side cover bus bar, a hydraulic torque converter, a middle bracket, a fan transmission and a planetary speed change mechanism; the absolute loss component includes: the hydraulic viscous speed reducer, the hydraulic viscous clutch, the oil pump set, the steering servo pump and the planetary speed change mechanism.
Example 4:
the present invention also provides a storage medium having stored thereon machine-executable instructions that, when invoked and executed by a processor, cause the processor to implement a method of drive train efficiency estimation based on test data.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. A method of estimating driveline efficiency, comprising the steps of:
step S1, dividing loss type components to obtain relative loss components and absolute loss components;
step S2, carrying out power flow analysis on the relative loss component and the absolute loss component according to the power flow output by the engine to obtain the loss power of the relative loss component and the absolute loss component;
step S3, calculating component efficiency according to the loss power of the loss component and the absolute loss component to obtain the total efficiency of the transmission system;
the relative loss element includes: the device comprises a front transmission mechanism, a steering pump motor, an auxiliary transmission mechanism, a left/right side cover busbar, a hydraulic torque converter, a middle bracket, a fan transmission mechanism and a planetary speed change mechanism; the absolute loss component includes: the hydraulic viscous speed reducer, the hydraulic viscous clutch, the oil pump set, the steering servo pump and the planetary speed change mechanism;
the power output by the engine is divided into five paths after being subjected to front transmission, and the five paths are sequentially from top to bottom: the system comprises a steering branch circuit, a variable speed branch circuit, a fan circuit, an oil pump set and a steering servo pump; in the straight-driving mechanical mode, the steering branch does not work, namely the power loss of a steering pump motor and a steering servo pump is 0; the power loss of the hydraulic torque converter is 0; setting the output power P of the engine d ，
Power flow analysis of front drive:
the output power through the front transmission is: p qcd ＝P d η qcd Wherein η qcd Front drive efficiency;
power flow analysis of the shunt calculation:
front transmission output power P qcd The system is divided into a fan path, an oil pump set and a variable speed branch path; power loss P of fan circuit s1 Comprises the following steps: p s1 ＝P ynlhq Wherein P is ynlhq Belt loss for a hydro-viscous clutch; power loss P of oil pump set s2 Comprises the following steps: p s2 ＝P ybz Wherein P is ybz For mounting on vehicles under working conditionsAssociated oil pump stack power losses; the power input to the variable speed branch is: p is bs ＝P qcd -P s1 -P s2 ；
Power flow analysis of the planetary transmission mechanism:
the power after passing through the planetary speed change mechanism is as follows: p xx ＝η xx P bs -P dp Wherein η xx For planetary gear train efficiency, P dp The planetary speed change mechanism is provided with row loss;
analyzing the power flow of the hydro-viscous speed reducer:
the power after passing through the hydro-viscous reducer is as follows: p js ＝P xx -P ynjsq Wherein P is ynjsq Power loss for the hydro-viscous retarder;
power flow analysis of left/right side cover buss:
the power after passing through the left and right bus bars is as follows: p out ＝η hl P js -P jy Wherein η hl For left and right bus bar efficiency, P jy Churning losses for the transmission.
2. The driveline efficiency estimation method of claim 1, wherein components involved in the power flow are divided into components containing test data and components not containing test data; the components containing the test data include: preceding transmission, planet speed change mechanism and oil pump group, the part that does not contain the test data includes: the left/right side cover bus bar, the hydro-viscous speed reducer and the hydro-viscous clutch; calculating the efficiency of the part by fitting a curved surface to the part containing the test data through the test data, and calculating the efficiency of the part by theoretically fitting the part without the test data; the efficiency with the test data component and the efficiency without the test data component are obtained by the following formula ch ，
3. The driveline efficiency estimation method of claim 2, wherein calculating component efficiency by fitting a surface to the test data for the component containing the test data comprises: judging whether the given rotating speed and load are in the range of the test data, and if so, directly adopting the efficiency of the components in the test data; if not, fitting the test data into a polynomial by using a polynomial fitting method, namely:
η＝p 00 +p 10 x+p 01 y+p 20 x 2 +p 11 xy+p 02 y 2 +p 30 x 3 +p 21 x 2 y+p 12 xy 2 +p 40 x 4 +p 31 x 3 y+p 22 x 2 y 2 +p 50 x 5 +p 41 x 4 y+p 32 x 3 y 2
where eta is the efficiency, p ij All are fitting coefficients, i is 0,1,2,3,4,5, j is 0,1,2, x and y represent rotation speed and load, respectively;
if the fitted efficiency value is not in the reasonable value range, fitting is carried out again, and the fitting coefficient is modified; and if the fitting result still does not meet the condition, increasing the fitting precision until the value range is met.
4. A driveline efficiency estimation apparatus, comprising:
the dividing module is used for dividing loss type components to obtain relative loss components and absolute loss components;
the analysis module is used for carrying out power flow analysis on the relative loss component and the absolute loss component according to the power flow output by the engine to obtain the loss power of the relative loss component and the absolute loss component;
the calculation module is used for evaluating and calculating the efficiency of the components according to the loss power of the loss components and the loss power of the absolute loss components to obtain the total efficiency of the transmission system;
the relative loss component includes: the device comprises a front transmission, a steering pump motor, an auxiliary transmission, a left/right side cover bus bar, a hydraulic torque converter, a middle bracket, a fan transmission and a planetary speed change mechanism; the absolute loss component includes: the hydraulic viscous speed reducer, the hydraulic viscous clutch, the oil pump set, the steering servo pump and the planetary speed change mechanism;
the power output by the engine is divided into five paths after being subjected to front transmission, and the five paths are sequentially from top to bottom: the system comprises a steering branch circuit, a variable speed branch circuit, a fan circuit, an oil pump set and a steering servo pump; in the straight-driving mechanical mode, the steering branch does not work, namely the power loss of a steering pump motor and a steering servo pump is 0; the power loss of the hydraulic torque converter is 0; setting the output power P of the engine d ，
Power flow analysis of front drive:
the output power through the front transmission is: p qcd ＝P d η qcd Wherein η qcd Front drive efficiency;
power flow analysis of the shunt calculation:
front transmission output power P qcd The system is divided into a fan path, an oil pump set and a variable speed branch path; power loss P of fan circuit s1 Comprises the following steps: p s1 ＝P ynlhq Wherein P is ynlhq Belt loss for a hydro-viscous clutch; power loss P of oil pump set s2 Comprises the following steps: p is s2 ＝P ybz Wherein P is ybz The power loss of an oil pump group related to the vehicle loading under the working condition is used; the power input to the variable speed branch is: p bs ＝P qcd -P s1 -P s2 ；
Power flow analysis of the planetary transmission mechanism:
the power after passing through the planetary speed change mechanism is as follows: p xx ＝η xx P bs -P dp Wherein η xx For planetary gear train efficiency, P dp The planetary speed change mechanism is provided with row loss;
analyzing the power flow of the hydro-viscous speed reducer:
the power after passing through the hydro-viscous reducer is as follows: p js ＝P xx -P ynjsq Wherein P is ynjsq Power loss for the hydro-viscous retarder;
power flow analysis of left/right side cover buss:
the power after passing through the left and right bus bars is as follows: p out ＝η hl P js -P jy Wherein η hl For left and right bus bar efficiency, P jy Churning losses for the transmission.
5. A storage medium having stored thereon machine executable instructions which, when invoked and executed by a processor, cause the processor to carry out the driveline efficiency estimation method of any one of claims 1 to 3.
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| CN112677957A (en) * | 2021-01-07 | 2021-04-20 | 重庆大学 | Parameter optimization method based on pareto optimality under dual-mode configuration multi-target condition |
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