CN115222439A - Vehicle maintenance strategy method and device, computer equipment and storage medium - Google Patents
Vehicle maintenance strategy method and device, computer equipment and storage medium Download PDFInfo
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Abstract
The invention discloses a vehicle maintenance strategy method, a device, computer equipment and a storage medium, wherein the method part comprises the following steps: acquiring vehicle vitality data of different years, and determining normal logarithmic distribution data of the vehicle in different years according to the vehicle vitality data of different years; determining a vehicle vitality degradation curve by adopting a regression analysis method based on normal logarithmic distribution data of the vehicle in different years; according to the vehicle vitality degradation curve, carrying out simulation calculation on maintenance costs required by the vehicle during maintenance in different maintenance strategies to obtain a target maintenance strategy meeting a preset cost condition; the invention provides a cost optimization maintenance strategy based on the life cycle of the vehicle, and the maintenance strategy which meets the life variation of the vehicle and the cost control requirement can be made by predicting the life attenuation trend of the vehicle, so that the maintenance cost of the vehicle can be reasonably controlled on the basis of accurately mastering the maintenance opportunity, and the cost optimization is realized.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a vehicle maintenance strategy method, a vehicle maintenance strategy device, computer equipment and a storage medium.
Background
In the process that a user uses the vehicle, the life force of the vehicle can be attenuated along with the service life of the vehicle, in order to improve the life cycle of the vehicle, the vehicle needs to be maintained frequently so as to improve the life cycle of the vehicle, and the user experience is improved.
In the prior art, a vehicle maintenance method mainly comprises modes of reactive maintenance, periodic maintenance and the like. The reactive maintenance is to take maintenance measures to maintain the vehicle when the vehicle product is found to have problems, but the vehicle maintenance is carried out only when the vehicle product is found to have problems, so that the optimal maintenance opportunity is easily missed, and the subsequent maintenance cost is overhigh; the regular maintenance is a measure for taking regular maintenance to the vehicle in the life cycle of the vehicle at a preset maintenance time point, but the regular maintenance mode is too mechanical and extensive, the maintenance time cannot be accurately grasped, and the subsequent maintenance cost is easily overhigh.
Therefore, the existing vehicle maintenance methods are insufficient, and it is difficult to accurately grasp the vehicle maintenance timing, which results in an excessively high vehicle maintenance cost.
Disclosure of Invention
The invention provides a vehicle maintenance strategy method, a vehicle maintenance strategy device, computer equipment and a storage medium, which are used for solving the problem that the vehicle maintenance cost is overhigh due to the fact that the maintenance time of a vehicle is difficult to accurately grasp by the existing maintenance method.
A vehicle maintenance strategy determination method is provided, which comprises the following steps:
acquiring vehicle vitality data of different years, and determining normal logarithmic distribution data of the vehicle in different years according to the vehicle vitality data of different years;
determining a vehicle life force degradation curve by adopting a regression analysis method based on normal logarithmic distribution data of the vehicle in different years, wherein the vehicle life force degradation curve is used for representing life force attenuation trend of the vehicle;
and according to the vehicle vitality degradation curve, performing simulation calculation on maintenance cost required by the vehicle in maintenance of different maintenance strategies to obtain a target maintenance strategy meeting a preset cost condition.
Further, the obtaining a target maintenance strategy meeting a preset cost condition by performing simulation calculation on maintenance costs required by the vehicle during maintenance of different maintenance strategies according to the vehicle vitality degradation curve includes:
acquiring a plurality of preset maintenance threshold values, wherein the preset maintenance threshold values are corresponding vital force values when the vehicle needs to be maintained;
a plurality of different maintenance strategies are formulated according to the vehicle vitality degradation curve and each preset maintenance threshold value, the maintenance strategies comprise a plurality of maintenance target values corresponding to the maintenance time points, and the maintenance target values are target vitality values required to be reached when the vehicle is maintained;
inputting a plurality of maintenance strategies into a cost iterative model for cost simulation calculation so as to determine the total maintenance cost required by the vehicle when adopting each maintenance strategy;
and selecting the maintenance strategy with the lowest total maintenance cost as the target maintenance strategy.
Further, the formulating a plurality of different maintenance strategies according to the vehicle life force degradation curve and each of the preset maintenance threshold values includes:
a. predicting a time point when the vital force value of the vehicle reaches a preset maintenance threshold value according to the vehicle vital force degradation curve, and taking the time point as the maintenance time point to obtain a plurality of maintenance time points;
b. determining maintenance target values corresponding to the maintenance time points according to competitive product vitality data of different years and competition strategies of different years;
c. generating a maintenance strategy according to the maintenance time points and the corresponding maintenance target values;
d. and changing the preset maintenance threshold value, and repeating the steps a to c until all the preset maintenance threshold values are traversed to obtain the plurality of different maintenance strategies.
Further, the determining a maintenance target value corresponding to each maintenance time point according to the competitive product vitality data of different years and the competitive strategies of different years includes:
acquiring competitive product vitality data of different competitive products in different years, and determining normal logarithmic distribution data of the different competitive products in different years according to the competitive product vitality data;
determining the vitality deterioration curves of the different competitive products in different years according to the normal logarithmic distribution data of the different competitive products in different years;
determining the vital force values of different competitive products at the same maintenance time point according to the vital force degradation curves of the competitive products, and obtaining a plurality of maintenance vital force values;
and determining the maintenance target values corresponding to the maintenance time points according to the plurality of maintenance vital force values and the competition strategies of the years corresponding to the maintenance time points so as to determine the maintenance target values corresponding to the maintenance time points.
Further, the determining a maintenance target value corresponding to the maintenance time point according to the plurality of maintenance vital force values and the competition policy of the year corresponding to the maintenance time point includes:
determining a target life maintenance cost required to maintain the vital force value of the vehicle to each of the maintenance vital force values;
determining whether each of the target life maintenance costs meets the requirements of the competitive strategy for the corresponding year;
and if the target life maintenance cost meets the requirement of the competitive strategy of the corresponding year, taking the target life maintenance cost as the maintenance target value.
Further, the obtaining a plurality of preset maintenance threshold values includes:
acquiring preset maintenance data of the vehicle, wherein the preset maintenance data comprise preset maintenance threshold values of the vehicle in different years, and the preset maintenance threshold values are corresponding vital force values determined according to a competition strategy when the vehicle needs to be maintained;
and determining preset maintenance threshold values of the vehicle in different years in the preset maintenance data.
Further, the determining the life strength degradation curve of the vehicle in different years by adopting a regression analysis method based on the normal logarithmic distribution data of the vehicle in different years comprises the following steps:
performing probability reliability degradation solving on the vitality of the vehicle based on normal logarithmic distribution data of the vehicle in different years, and determining reliability indexes of the vitality data of the vehicle in different years;
and performing regression analysis on the reliability indexes of different years to obtain a vehicle vitality degradation curve of the vehicle.
There is provided a vehicle maintenance strategy determination apparatus including:
the acquisition module is used for acquiring vehicle vitality data of different years and determining normal logarithmic distribution data of the vehicle in different years according to the vehicle vitality data of different years;
the determining module is used for determining a vehicle life force degradation curve by adopting a regression analysis method based on normal logarithmic distribution data of the vehicle in different years, wherein the vehicle life force degradation curve is used for representing life force attenuation trend of the vehicle;
and the calculation module is used for performing simulation calculation on the maintenance cost required by the vehicle in the maintenance of different maintenance strategies according to the vehicle vitality degradation curve to obtain a target maintenance strategy meeting a preset cost condition.
There is also provided a computer device comprising a memory, a processor and a computer program stored in the memory and executable on the processor, the processor implementing the steps of the vehicle maintenance strategy method described above when executing the computer program.
A computer-readable storage medium is also provided, which stores a computer program that, when executed by a processor, implements the steps of the vehicle maintenance strategy method described above.
In one scheme provided by the vehicle maintenance strategy method, the vehicle maintenance strategy device and the storage medium, normal logarithmic distribution data of the vehicle in different years are determined by acquiring vehicle vitality data of different years according to the vehicle vitality data of different years; determining a vehicle life force degradation curve by adopting a regression analysis method based on normal logarithmic distribution data of the vehicle in different years, wherein the vehicle life force degradation curve is used for representing the life force attenuation trend of the vehicle; according to the vehicle vitality degradation curve, performing simulation calculation on maintenance cost required by the vehicle during maintenance in different maintenance strategies to obtain a target maintenance strategy meeting a preset cost condition; the invention provides a cost optimization maintenance strategy based on the life cycle of the vehicle, and the maintenance strategy which meets the life change of the vehicle and meets the cost control requirement can be worked out by predicting the life attenuation trend of the vehicle, so that the maintenance cost of the vehicle can be reasonably controlled on the basis of accurately mastering the maintenance opportunity, and the cost optimization is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic diagram of an exemplary application environment for a vehicle maintenance strategy determination system in accordance with an embodiment of the present invention;
FIG. 2 is a schematic flow chart of a vehicle maintenance strategy determination method according to an embodiment of the invention;
FIG. 3 is a graph illustrating vehicle life degradation in accordance with an embodiment of the present invention;
FIG. 4 is a graph of maintenance costs over different years in one embodiment of the invention;
FIG. 5 is a graph of total maintenance cost for different maintenance strategies in an embodiment of the present invention;
FIG. 6 is a schematic view of a vehicle maintenance strategy determining apparatus according to an embodiment of the present invention;
fig. 7 is another schematic structural diagram of the vehicle maintenance strategy determining apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The vehicle maintenance strategy determining method provided by the embodiment of the invention can be applied to an application environment shown in fig. 1, and the vehicle maintenance strategy determining system comprises a vehicle 101 and a vehicle maintenance strategy determining device 102, wherein the vehicle can communicate with the vehicle maintenance strategy determining device through a network, the vehicle uploads related data to a cloud server, the vehicle maintenance strategy determining device acquires vehicle historical data on the cloud server, then acquires vehicle vitality data of different years according to the vehicle historical data, and determines normal state logarithmic distribution data of the vehicle in different years according to the vehicle vitality data of different years; determining a vehicle life force degradation curve by adopting a regression analysis method based on normal logarithmic distribution data of the vehicle in different years, wherein the vehicle life force degradation curve is used for representing the life force attenuation trend of the vehicle; according to the vehicle vitality degradation curve, carrying out simulation calculation on maintenance costs required by the vehicle during maintenance in different maintenance strategies to obtain a target maintenance strategy meeting a preset cost condition; the invention provides a cost optimization maintenance strategy based on the life cycle of the vehicle, and the maintenance strategy which meets the life variation of the vehicle and the cost control requirement can be made by predicting the life attenuation trend of the vehicle, so that the maintenance cost of the vehicle can be reasonably controlled on the basis of accurately mastering the maintenance opportunity.
In this embodiment, the vehicle maintenance strategy determination system includes a vehicle and a vehicle maintenance strategy determination device for exemplary purposes only, and in other embodiments, the vehicle maintenance strategy determination system may also include other devices, such as an item of competition 103 for the vehicle. The maintenance strategy of the vehicle is optimized by acquiring the vitality data of the competitive products, so that the competitiveness of the vehicle is improved.
In an embodiment, as shown in fig. 2, a vehicle maintenance strategy determining method is provided, which is described by taking the vehicle maintenance strategy determining apparatus in fig. 1 as an example, and includes the following steps:
s10: and acquiring vehicle vitality data of different years, and determining normal logarithmic distribution data of the vehicle in different years according to the vehicle vitality data of different years.
Historical real vehicle data of the vehicle in different years are obtained, and then the vitality evaluation results of the project evaluation team on the historical real vehicle data through subjective evaluation, test and the like are obtained, so that the vehicle vitality data in different years are obtained. After the vehicle vitality data of different years are obtained, the vehicle vitality data are processed and analyzed according to the vehicle vitality data of different years, so that normal logarithmic distribution data of the vehicle of different years are determined.
S20: and determining a vehicle vitality degradation curve by adopting a regression analysis method based on normal logarithmic distribution data of the vehicle in different years.
After the normal logarithmic distribution data of different years are determined, the life force of the vehicle is analyzed by adopting a regression analysis method based on the normal logarithmic distribution data of the vehicle in different years, and the regression relation of the life force data of the vehicle in different years is obtained to determine the life force degradation curve of the vehicle. Wherein the vehicle life deterioration curve is used for representing the life attenuation trend of the vehicle,
in the embodiment, the international standard is introduced to describe the attenuation of the vital force of the vehicle by using the reliability index β, and the obtained regression equation related to the reliability index represents the attenuation trend of the vital force of the vehicle, that is, the degradation curve of the vital force of the vehicle is used for representing the attenuation trend of the vital force of the vehicle along with time, and is actually drawn by the vital force index at different years (time) and with a certain confidence. Wherein, the reliability index beta is the index of predicting future vitality under a certain confidence coefficient condition.
The decay tendency of the vehicle vital force with time is shown in fig. 3, the abscissa axis in fig. 3 represents different vital force sampling years (time t), the vital force sampling years in fig. 3 are t1, t2, t3 and tn, respectively, the ordinate axis of the abscissa axis in fig. 3 represents the reliability index (Beta), the reliability indexes corresponding to t1, t2, t3 and tn are shown in fig. 3, represent vital force indexes of the vehicle at t1, t2, t3 and tn, and a vehicle vital force degradation curve B (ti) can be obtained after regression analysis.
S30: and according to the life force degradation curve of the vehicle, performing simulation calculation on maintenance cost required by the vehicle in maintenance of different maintenance strategies to obtain a target maintenance strategy meeting a preset cost condition.
After the vehicle vitality degradation curve is obtained, according to the vehicle vitality degradation curve, simulation calculation is carried out on maintenance cost required by the vehicle during maintenance in different maintenance strategies, and a target maintenance strategy meeting a preset cost condition is obtained.
The maintenance strategy at least comprises a maintenance time point and a corresponding maintenance target value (a target vital force value which needs to be reached when the vehicle is maintained). It is understood that when the vital value of the vehicle is decreased to a certain value (which is a maintenance threshold value), maintenance of the vehicle is required at the time point to increase the vital value of the vehicle to a maintenance target value to increase the life cycle of the vehicle. Therefore, after the vehicle life force degradation curve is obtained, the maintenance time point needing to be maintained is determined according to the change of the vehicle life force value represented in the vehicle life force degradation curve, the target maintenance value required to be achieved in each maintenance is determined, different maintenance strategies are drawn up, on the basis, the maintenance cost required by the different maintenance strategies is calculated in a simulation mode, and then the maintenance strategy meeting the cost control requirement is selected to serve as the final target maintenance strategy, so that the vehicle can be maintained according to the target maintenance strategy.
In the embodiment, normal logarithmic distribution data of the vehicle in different years is determined by acquiring vehicle vitality data of different years and according to the vehicle vitality data of different years; determining a vehicle life force degradation curve by adopting a regression analysis method based on normal logarithmic distribution data of the vehicle in different years, wherein the vehicle life force degradation curve is used for representing the life force attenuation trend of the vehicle; according to the vehicle vitality degradation curve, performing simulation calculation on maintenance cost required by the vehicle during maintenance in different maintenance strategies to obtain a target maintenance strategy meeting a preset cost condition; the invention provides a cost optimization maintenance strategy based on the life cycle of the vehicle, and the maintenance strategy which meets the life change of the vehicle and meets the cost control requirement can be worked out by predicting the life attenuation trend of the vehicle, so that the maintenance cost of the vehicle can be reasonably controlled on the basis of accurately mastering the maintenance opportunity, the development cost of the vehicle can be greatly reduced, the cost optimization is realized, and the enterprise profit is improved.
In an embodiment, in step S20, that is, determining the vehicle vitality degradation curves in different years by using a regression analysis method based on normal logarithmic distribution data of the vehicle in different years, the method specifically includes the following steps:
s21: and performing probability reliability degradation solving on the vitality of the vehicle based on the normal logarithmic distribution data of the vehicle in different years, and determining the reliability indexes of the vitality data of the vehicle in different years.
S22: and carrying out regression analysis on the reliability indexes of different years to obtain a vehicle vitality degradation curve of the vehicle.
After normal logarithmic distribution data of the vehicle in different years are obtained, probability reliability degradation solving is carried out on the vitality of the vehicle on the basis of the normal logarithmic distribution data of the vehicle in different years, reliability indexes of the vitality data of the vehicle in different years are determined, regression analysis is carried out on the reliability indexes in different years, a regression equation of the reliability indexes changing along with the years is determined, namely a vehicle vitality degradation curve of the vehicle is obtained, and the vitality decay trend of the vehicle in the subsequent years is predicted.
Specifically, the average value and the standard deviation of the life force values of the vehicle in different years need to be determined according to the life force data of the vehicle, and then the ratio of the average value to the standard deviation is used as the reliability index, namely the calculation formula of the reliability index is as follows:
wherein, mu z Is the average value, sigma, of the values of the annual vital forces of the vehicle z The standard deviation of the life force values of the vehicles in different years.
In the embodiment, probability reliability degradation solution is performed on the vitality of the vehicle based on normal logarithmic distribution data of the vehicle in different years, reliability indexes of the vitality data of the vehicle in different years are determined, regression analysis is performed on the reliability indexes in different years, a vehicle vitality degradation curve of the vehicle is obtained, a specific process of determining the vehicle vitality degradation curve in different years by adopting a regression analysis method based on the normal logarithmic distribution data of the vehicle in different years is determined, and a basis is provided for subsequently determining a target maintenance strategy.
In an embodiment, in step S30, that is, according to the vehicle vitality degradation curve, the maintenance cost required when the vehicle is maintained by different maintenance strategies is calculated in a simulation manner, so as to obtain the target maintenance strategy meeting the preset cost condition, which specifically includes the following steps:
s31: and acquiring a plurality of preset maintenance threshold values, wherein the preset maintenance threshold values are corresponding vital force values when the vehicle needs to be maintained.
In the process of determining a target maintenance strategy of the vehicle according to the vehicle vitality degradation curve, a plurality of preset maintenance threshold values need to be acquired, wherein the preset maintenance threshold values are corresponding vitality values when the vehicle needs to be maintained. In this embodiment, the predetermined maintenance threshold is determined based on different contention policies. The competition strategy is determined according to a specific vehicle type, such as big or small, low-price cut-in, dislocation competition, and the like, and according to different competition strategies, the expert team can determine different preset maintenance thresholds, wherein the preset maintenance thresholds are generally not lower than the average level of competition circles (competition circles consisting of a plurality of vehicle competitions).
It can be understood that the preset maintenance threshold is a warning value, the vitality of the vehicle will decrease continuously with time after the vehicle is on the market, and when the vitality of the vehicle reaches the preset maintenance threshold, a maintenance action is required to ensure that the competition policy is valid.
It should be understood that, on the basis that the vital force values are the same, the maintenance costs required under different competitive strategies are different, and the competitive strategies at different years are different, so that the maintenance costs required for maintaining the vehicle at different years are different, that is, the preset maintenance threshold value may be determined according to the maintenance costs required for maintaining at different vital force values under the competitive strategy at the current year, and the vital force value with the lowest maintenance cost in the current year may be selected as the preset maintenance threshold value.
The maintenance cost curves of different years are shown in fig. 4, the maintenance cost (unit: element) changes required for maintaining the vehicles with different vital value values in the first year, the second year and the third year are respectively shown, the vital value values corresponding to the lowest maintenance cost of the first year, the second year and the third year are respectively 75, 80 and 90, and therefore, the 75, 80 and 90 are used as the preset maintenance threshold values to formulate the corresponding maintenance strategy.
S32: and formulating a plurality of different maintenance strategies according to the vehicle vitality deterioration curve and each preset maintenance threshold value, wherein the maintenance strategies comprise maintenance target values corresponding to a plurality of maintenance time points, and the maintenance target values are target vitality values required to be achieved when the vehicle is maintained.
After a plurality of preset maintenance threshold values are obtained, a plurality of different maintenance strategies are formulated according to the vehicle vitality degradation curve and each preset maintenance threshold value, wherein the maintenance strategies comprise maintenance target values corresponding to a plurality of maintenance time points, and the maintenance target values are target vitality values required to be reached when the vehicle is maintained.
Specifically, after obtaining a plurality of preset maintenance threshold values, a time point at which the vehicle vital force reaches a preset maintenance threshold value may be predicted according to the vehicle vital force degradation curve, where the time point is a maintenance time point, and then it is determined that the vehicle vital force needs to be maintained to a certain vital force value at the maintenance time point, where the vital force value needs to be maintained to a certain value, and the vital force value needs to be maintained to a maintenance target value, that is, the maintenance policy includes a specific maintenance time point at which the vehicle is maintained and a maintenance target value corresponding to the maintenance time point. Since the vehicle vital force will continuously decrease with time, after maintenance is performed at a maintenance time point, the vehicle vital force value will still decrease to a preset maintenance threshold value at a future time point, and the process is repeated until the vehicle vital force is too low to be maintained, so that a plurality of maintenance time points exist in the maintenance strategy. Different preset maintenance threshold values are defined to have different maintenance time points, so that different preset maintenance thresholds can correspondingly form different maintenance strategies, and the maintenance target values in the different maintenance strategies can be the same or different.
S33: and inputting the plurality of maintenance strategies into the cost iterative model for cost simulation calculation so as to determine the total maintenance cost required when the vehicle adopts each maintenance strategy.
After a plurality of different maintenance strategies are formulated, the plurality of maintenance strategies are input into a cost iterative model for cost simulation calculation to determine the total maintenance cost required for the vehicle to adopt each maintenance strategy. The method comprises the steps of inputting different groups of maintenance time points and corresponding maintenance target values into a cost iterative model, calculating maintenance costs required for maintaining the vehicle vitality to the corresponding maintenance target values at different maintenance time points in the same maintenance strategy, obtaining the optimal balance of the iterative time (maintenance time points), the maintenance costs and the maintenance target values, and finally obtaining the total maintenance costs required for the vehicle to adopt each maintenance strategy.
The total maintenance cost is obtained by the following formula:
C ti ＝P f *e*C ini +P f *(1-e)*C m +P r *e*C m +P r *(1-e)*C ini ；
wherein, C ti For total maintenance costs, C m Maintenance cost for the corresponding maintenance strategy, C ini For new product input costs of the vehicle, P f Probability of failure for vehicle maintenance, P r E is the error, which is the reliability probability of vehicle maintenance.
S34: and selecting the maintenance strategy with the lowest total maintenance cost as the target maintenance strategy.
After determining the total maintenance cost required when the vehicle adopts each maintenance strategy, selecting the maintenance strategy with the lowest total maintenance cost as the target maintenance strategy.
For example, fig. 5 shows a graph of total maintenance cost of different maintenance strategies, where the plurality of preset maintenance thresholds include 90, 80, and 75, and the total maintenance cost required by the corresponding maintenance strategy is as shown in fig. 5, and it can be known from fig. 5 that the total maintenance cost required by the maintenance strategy corresponding to the preset maintenance threshold of 70 is the lowest, and then the maintenance strategy corresponding to the preset maintenance threshold of 70 is selected as the target maintenance strategy.
In the embodiment, the maintenance time point, the maintenance target value and the maintenance cost of the vehicle vitality are simulated and calculated according to the vehicle vitality degradation curve, so that the optimal balance point of the maintenance time point, the maintenance target value and the maintenance cost is obtained, the optimal maintenance target value, the optimal maintenance time point and the optimal maintenance cost are determined, and the cost is reduced to the maximum extent on the basis of ensuring the accurate grasping of the maintenance timing.
In the embodiment, a plurality of preset maintenance threshold values are obtained, the preset maintenance threshold values are corresponding vital force values when a vehicle needs to be maintained, then a plurality of different maintenance strategies are formulated according to a vehicle vital force degradation curve and each preset maintenance threshold value, the maintenance strategies comprise maintenance target values corresponding to a plurality of maintenance time points, the maintenance target values are target vital force values required by the vehicle when the vehicle needs to be maintained, then the maintenance strategies are input into a cost iteration model to be subjected to cost simulation calculation so as to determine the total maintenance cost required when the vehicle adopts each maintenance strategy, finally the maintenance strategy with the lowest total maintenance cost is selected to serve as a target maintenance strategy, the maintenance cost required when the vehicle needs to be maintained in different maintenance strategies is subjected to simulation calculation according to the vehicle vital force degradation curve, the specific steps of obtaining the target maintenance strategy meeting the preset cost conditions are obtained, the maintenance strategy with the lowest total maintenance cost is selected to serve as the target maintenance strategy, and the maintenance cost is reduced to the maximum on the basis of accurately grasping the maintenance opportunity. Setting a proper maintenance target at the optimal time, and carrying out active preventive maintenance on the vehicle to avoid losing the market due to missing the maintenance time; the cost waste caused by over-maintenance is avoided, the development cost of the vehicle is reduced, and the enterprise profit is improved.
In an embodiment, in step S32, a plurality of different maintenance strategies are established according to the vehicle life deterioration curve and each preset maintenance threshold, specifically including the following steps:
a. and predicting a time point when the vital force value of the vehicle reaches a preset maintenance threshold value according to the vehicle vital force degradation curve, and taking the time point as a maintenance time point to obtain a plurality of maintenance time points.
After obtaining a plurality of preset maintenance threshold values, selecting a preset maintenance threshold value, predicting a time point when the vital force value of the vehicle reaches a preset maintenance threshold value according to the vehicle vital force degradation curve, and taking the time point as a maintenance time point to obtain a plurality of maintenance time points.
b. And determining maintenance target values corresponding to the maintenance time points according to the competitive product vitality data of different years and the competition strategies of different years.
When a plurality of maintenance strategies are formulated, the competitive product vitality data of the competitive products of the vehicle in different years and the competitive product vitality data of the vehicle in different years are acquired, and then the maintenance target values corresponding to the maintenance time points are determined according to the competitive product vitality data in different years and the competitive strategies in different years. Namely, the maintenance target value needs to be determined according to the data of the competitive power of the vehicle competitive products in different years and the competition strategy of the vehicle in different years, so as to ensure that the vehicle after maintenance is competitive.
c. And generating a maintenance strategy according to the plurality of maintenance time points and the corresponding maintenance target values.
And after the maintenance target value corresponding to each maintenance time point is determined, generating a maintenance strategy according to the plurality of maintenance time points and the corresponding maintenance target values.
d. And d, changing the preset maintenance threshold value, and repeating the steps a to c until all the preset maintenance threshold values are traversed to obtain a plurality of different maintenance strategies.
After a maintenance strategy is generated according to a plurality of maintenance time points and corresponding maintenance target values, the preset maintenance threshold value needs to be changed, and the steps a to c are repeated until all the preset maintenance threshold values are traversed, so that a plurality of different maintenance strategies are obtained.
In this embodiment, a time point at which the vital power value of the vehicle reaches a preset maintenance threshold value is predicted according to the vehicle vital power degradation curve and is used as a maintenance time point, a plurality of maintenance time points are obtained according to competitive product vital power data of different years and competitive strategies of different years, a maintenance target value corresponding to each maintenance time point is determined, a maintenance strategy is generated according to the plurality of maintenance time points and the corresponding maintenance target values, the preset maintenance threshold value is changed and the above steps are repeated until all preset maintenance threshold values are traversed to obtain a plurality of different maintenance strategies, a process of formulating a plurality of different maintenance strategies according to the vehicle vital power degradation curve and the preset maintenance threshold values is determined, a basis is provided for formulating different maintenance strategies, meanwhile, the maintenance target value is determined according to the competitive product vital power data and the competitive strategies of different years, and the vehicle maintained according to the target maintenance strategy can be guaranteed to have competitive power.
In an embodiment, in the step b, the maintenance target value corresponding to each maintenance time point is determined according to the competitive product vitality data of different years and the competitive strategies of different years, which specifically includes the following steps:
b1. obtaining the vitality data of the different competitive products in different years, and determining the normal logarithmic distribution data of the different competitive products in different years according to the vitality data of the competitive products.
Obtaining the vitality data of different competitive products of the vehicle in different years, and determining the normal logarithmic distribution data of the different competitive products in different years according to the vitality data of the competitive products.
b2. And determining the vitality degradation curves of the different competitive products in different years according to the normal logarithmic distribution data of the different competitive products in different years.
After acquiring the normal logarithmic distribution data of different competitive products in different years, carrying out regression analysis on the vitality of each competitive product based on the normal logarithmic distribution data of different competitive products in different years, and determining the vitality degradation curves of the competitive products of different competitive products in different years. The obtaining process of the life deterioration curve of the competitive products is the same as the obtaining process of the life deterioration curve of the vehicle, and the details are not repeated herein.
b3. And determining the vital force values of different competitive products at the same maintenance time point according to the vital force degradation curves of the competitive products to obtain a plurality of maintenance vital force values.
After obtaining the vitality degradation curves of different competitive products in different years, determining the vitality values of the different competitive products at the same maintenance time point according to the vitality degradation curves of the different competitive products, and obtaining a plurality of maintenance vitality values.
b4. And determining the maintenance target values corresponding to the maintenance time points according to the plurality of maintenance vital force values and the competition strategies of the years corresponding to the maintenance time points so as to determine the maintenance target values corresponding to the maintenance time points.
Determining the vitality values of different competitive products at the same maintenance time point according to the vitality degradation curves of the competitive products, and determining the maintenance target values corresponding to the maintenance time points according to the plurality of maintenance vitality values and the competition strategies of the years corresponding to the maintenance time points after obtaining the plurality of maintenance vitality values so as to determine the maintenance target values corresponding to the maintenance time points.
In one embodiment, vehicle vitality data of the vehicle in different years can be obtained, competitive item vitality data of different competitive items of the vehicle in different years can be obtained, then normal logarithmic distribution processing is carried out on the vehicle vitality data and the competitive item vitality data, normal logarithmic distribution data of the vehicle in different years and normal logarithmic distribution data of different competitive items in different years are obtained, and a normal logarithmic distribution database is formed; and then carrying out regression analysis on the vehicle vitality and the competitive product vitality of different years based on a normal logarithmic distribution database to obtain a vehicle vitality degradation curve and competitive product vitality degradation curves of different competitive products for subsequent use so as to obtain a target maintenance strategy.
In the embodiment, the maintenance target values corresponding to the maintenance time points are determined according to the life power data of the competitive products at different years, the specific processes of the maintenance target values corresponding to the maintenance time points are determined according to the life power data of the competitive products at different years and the competition strategies of the competitive products at different years, and a foundation is provided for determining the maintenance target values.
In an embodiment, in the step b4, the maintenance target value corresponding to the maintenance time point is determined according to the plurality of maintenance vital value values and the competition policy of the year corresponding to the maintenance time point, which specifically includes the following steps:
b41. a target life maintenance cost required to maintain the vital force value of the vehicle to each maintenance vital force value is determined.
Determining the vital force values of different competitive products at the same maintenance time point according to the vital force degradation curves of the competitive products, and determining the target vital maintenance cost required for maintaining the vital force value of the vehicle to each maintenance vital force value after obtaining a plurality of maintenance vital force values.
b42. And determining whether each target life maintenance cost meets the requirement of the competitive strategy of the corresponding year.
After determining the target life maintenance costs required to maintain the vital value of the vehicle to each maintenance vital value, it is necessary to determine whether each target life maintenance cost meets the requirements of the competitive strategy for the corresponding year.
After determining whether each target life maintenance cost meets the requirement of the competitive strategy of the corresponding year, if the target life maintenance cost does not meet the requirement of the competitive strategy of the corresponding year, the maintenance cost required for maintaining the life force value of the vehicle to the maintenance life force value is possibly too high, the maintenance life force value is invalid, and the maintenance life force value is ignored and the next maintenance life force value is determined.
b43. And if the target life maintenance cost meets the requirement of the competitive strategy of the corresponding year, taking the target life maintenance cost as a maintenance target value.
After determining whether each target life maintenance cost meets the requirement of the competitive strategy of the corresponding year, if the target life maintenance cost meets the requirement of the competitive strategy of the corresponding year, namely the life force value of the vehicle is maintained until the maintenance cost required by the maintenance life force value meets the requirement, the target life maintenance cost is used as the maintenance target value.
In this embodiment, if there are a plurality of maintenance vital values that satisfy the requirement of the competitive strategy for the corresponding year, a maintenance vital value may be selected from the plurality of maintenance vital values that satisfy the requirement of the competitive strategy for the corresponding year as a maintenance target value according to the actual requirement; the average value of a plurality of maintenance vital force values meeting the requirement of the competitive strategy of the corresponding year can be used as a maintenance target value; the maintenance target value may be a median, a minimum, a maximum, or the like of a plurality of maintenance vital force values that satisfy the competitive policy requirements for the corresponding year.
In this embodiment, whether each target life maintenance cost meets the requirement of the competitive strategy of the corresponding year is determined by determining the target life maintenance cost required for maintaining the life force value of the vehicle to each maintenance life force value, and if the target life maintenance cost meets the requirement of the competitive strategy of the corresponding year, the target life maintenance cost is used as the maintenance target value, so that the specific process of determining the maintenance target value corresponding to the maintenance time point according to the plurality of maintenance life force values and the competitive strategy of the corresponding year corresponding to the maintenance time point is defined, the maintenance target value is determined based on the grade ring level, and the controllability of the cost is ensured.
In an embodiment, in step S31, obtaining a plurality of preset maintenance thresholds specifically includes the following steps:
s311: the method comprises the steps of obtaining preset maintenance data of the vehicle, wherein the preset maintenance data comprise preset maintenance threshold values of the vehicle in different years, and the preset maintenance threshold values are corresponding vital force values when the vehicle is required to be maintained according to the competition strategy.
S312: and determining preset maintenance threshold values of the vehicle in different years in the preset maintenance data.
The method comprises the steps of firstly obtaining preset maintenance data of a vehicle, and then determining preset maintenance threshold values of the vehicle in different years in the preset maintenance data. The preset maintenance data comprise preset maintenance threshold values of the vehicle in different years, and the preset maintenance threshold values are used as a plurality of preset maintenance threshold values. The preset maintenance threshold values of the vehicles in different years are specifically determined by competition strategies of corresponding years, and on the basis that the vital values are the same, the maintenance costs required by the different competition strategies are different, so that the maintenance costs required by the vehicles in different years are different.
Different preset maintenance threshold values are set for different years, so that maintenance strategies for maintenance in different years can be conveniently formulated according to the preset maintenance threshold values, and the change of maintenance cost consumed for maintenance in different years can be observed more clearly.
The preset maintenance data can be generated into a map, the preset maintenance threshold values of the vehicle in different years can be directly determined in the follow-up need, and the calculation speed is increased.
In this embodiment, the preset maintenance data of the vehicle is obtained, where the preset maintenance data includes preset maintenance threshold values of the vehicle in different years, and the preset maintenance threshold values of the vehicle in different years are determined in the preset maintenance data and serve as a plurality of preset maintenance threshold values, so that a process of obtaining the plurality of preset maintenance threshold values is defined, and a basis is provided for subsequently determining different maintenance strategies.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by functions and internal logic of the process, and should not limit the implementation process of the embodiments of the present invention in any way.
In one embodiment, a vehicle maintenance strategy determination device is provided, and the vehicle maintenance strategy determination device corresponds to the vehicle maintenance strategy determination method in the above embodiment one to one. As shown in fig. 6, the vehicle maintenance strategy determination apparatus includes an acquisition module 601, a determination module 602, and a calculation module 603. The functional modules are explained in detail as follows:
the obtaining module 601 is configured to obtain vehicle vitality data of different years, and determine normal logarithmic distribution data of a vehicle in different years according to the vehicle vitality data of different years;
a determining module 602, configured to determine a vehicle vitality degradation curve by using a regression analysis method based on normal logarithmic distribution data of the vehicle in different years, where the vehicle vitality degradation curve is used to represent a vitality decay trend of the vehicle;
and the calculating module 603 is configured to perform simulation calculation on the maintenance cost required by the vehicle during maintenance in different maintenance strategies according to the vehicle vitality degradation curve, so as to obtain a target maintenance strategy meeting a preset cost condition.
Further, the calculating module 603 is specifically configured to:
acquiring a plurality of preset maintenance threshold values, wherein the preset maintenance threshold values are corresponding vital force values when the vehicle needs to be maintained;
a plurality of different maintenance strategies are formulated according to the vehicle vitality degradation curve and each preset maintenance threshold value, the maintenance strategies comprise a plurality of maintenance target values corresponding to the maintenance time points, and the maintenance target values are target vitality values required to be reached when the vehicle is maintained;
inputting a plurality of maintenance strategies into a cost iterative model for cost simulation calculation so as to determine the total maintenance cost required by the vehicle when adopting each maintenance strategy;
and selecting the maintenance strategy with the lowest total maintenance cost as the target maintenance strategy.
Further, the calculating module 603 is specifically further configured to:
a. predicting a time point when the vital force value of the vehicle reaches a preset maintenance threshold value according to the vehicle vital force degradation curve, and taking the time point as the maintenance time point to obtain a plurality of maintenance time points;
b. determining maintenance target values corresponding to the maintenance time points according to the competitive product vitality data of different years and competition strategies of different years;
c. generating a maintenance strategy according to the maintenance time points and the corresponding maintenance target values;
d. and changing the preset maintenance threshold value, and repeating the steps a to c until all the preset maintenance threshold values are traversed to obtain the plurality of different maintenance strategies.
Further, the calculating module 603 is specifically further configured to:
acquiring competitive product vitality data of different competitive products in different years, and determining normal logarithmic distribution data of the different competitive products in different years according to the competitive product vitality data;
determining the vitality degradation curves of the different competitive products in different years according to the normal logarithmic distribution data of the different competitive products in different years;
determining the vitality values of different competitive products at the same maintenance time point according to the vitality degradation curves of the competitive products to obtain a plurality of maintenance vitality values;
and determining the maintenance target values corresponding to the maintenance time points according to the plurality of maintenance vital force values and the competition strategies of the years corresponding to the maintenance time points so as to determine the maintenance target values corresponding to the maintenance time points.
Further, the calculating module 603 is specifically further configured to:
determining a target life maintenance cost required to maintain the vital force value of the vehicle to each of the maintenance vital force values;
determining whether each of the target life maintenance costs meets the requirements of the competitive strategy for the corresponding year;
and if the target life maintenance cost meets the requirement of the competitive strategy of the corresponding year, taking the target life maintenance cost as the maintenance target value.
Further, the calculating module 603 is specifically further configured to:
acquiring preset maintenance data of the vehicle, wherein the preset maintenance data comprise preset maintenance threshold values of the vehicle in different years;
and determining preset maintenance threshold values of the vehicle in different years in the preset maintenance data.
Further, the determining module 602 is specifically configured to:
performing probability reliability degradation solving on the vitality of the vehicle based on normal logarithmic distribution data of the vehicle in different years, and determining reliability indexes of the vitality data of the vehicle in different years;
and performing regression analysis on the reliability indexes of different years to obtain a vehicle vitality degradation curve of the vehicle.
For specific definition of the vehicle maintenance strategy determination device, reference may be made to the above definition of the vehicle maintenance strategy determination method, which is not described herein again. The various modules in the vehicle maintenance strategy determination apparatus described above may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent of a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, a vehicle maintenance strategy determination apparatus is provided, which may be a server, comprising a processor, a memory, a network interface, and a database connected by a system bus. Wherein the processor of the computer device is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The database of the vehicle maintenance strategy determination device is used for storing relevant data used by and generated by the vehicle maintenance strategy determination method. The network interface of the vehicle maintenance strategy determination device is used for communicating with the vehicle through a network connection. The computer program is executed by a processor to implement a vehicle maintenance strategy determination method.
In one embodiment, as shown in fig. 7, there is provided a vehicle maintenance strategy determination apparatus, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the following steps when executing the computer program:
acquiring vehicle vitality data of different years, and determining normal logarithmic distribution data of the vehicle in different years according to the vehicle vitality data of different years;
determining a vehicle life force degradation curve by adopting a regression analysis method based on normal logarithmic distribution data of the vehicle in different years, wherein the vehicle life force degradation curve is used for representing life force attenuation trend of the vehicle;
and according to the vehicle vitality degradation curve, performing simulation calculation on maintenance cost required by the vehicle in maintenance of different maintenance strategies to obtain a target maintenance strategy meeting a preset cost condition.
In one embodiment, a computer-readable storage medium is provided, having a computer program stored thereon, which when executed by a processor, performs the steps of:
acquiring vehicle vitality data of different years, and determining normal logarithmic distribution data of the vehicle in different years according to the vehicle vitality data of different years;
determining a vehicle life force degradation curve by adopting a regression analysis method based on normal logarithmic distribution data of the vehicle in different years, wherein the vehicle life force degradation curve is used for representing life force attenuation trend of the vehicle;
and according to the vehicle vitality degradation curve, performing simulation calculation on maintenance cost required by the vehicle in maintenance of different maintenance strategies to obtain a target maintenance strategy meeting a preset cost condition.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include non-volatile and/or volatile memory. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), rambus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM).
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A vehicle maintenance strategy determination method, comprising:
acquiring vehicle vitality data of different years, and determining normal logarithmic distribution data of the vehicle in different years according to the vehicle vitality data of different years;
determining a vehicle life force degradation curve by adopting a regression analysis method based on normal logarithmic distribution data of the vehicle in different years, wherein the vehicle life force degradation curve is used for representing life force attenuation trend of the vehicle;
and according to the vehicle vitality degradation curve, performing simulation calculation on maintenance cost required by the vehicle in maintenance of different maintenance strategies to obtain a target maintenance strategy meeting a preset cost condition.
2. The vehicle maintenance strategy determination method according to claim 1, wherein the step of performing simulation calculation on maintenance costs required by the vehicle during maintenance of different maintenance strategies according to the vehicle life deterioration curve to obtain a target maintenance strategy meeting a preset cost condition comprises:
acquiring a plurality of preset maintenance threshold values, wherein the preset maintenance threshold values are corresponding vital force values when the vehicle needs to be maintained;
a plurality of different maintenance strategies are formulated according to the vehicle vitality degradation curve and each preset maintenance threshold value, the maintenance strategies comprise a plurality of maintenance target values corresponding to the maintenance time points, and the maintenance target values are target vitality values required to be reached when the vehicle is maintained;
inputting a plurality of maintenance strategies into a cost iterative model for cost simulation calculation so as to determine the total maintenance cost required by the vehicle when adopting each maintenance strategy;
and selecting the maintenance strategy with the lowest total maintenance cost as the target maintenance strategy.
3. The vehicle maintenance strategy determination method of claim 2, wherein said formulating a plurality of different maintenance strategies based on said vehicle life degradation curve and each of said preset maintenance thresholds comprises:
a. predicting a time point when the vital force value of the vehicle reaches a preset maintenance threshold value according to the vehicle vital force degradation curve, and taking the time point as the maintenance time point to obtain a plurality of maintenance time points;
b. determining maintenance target values corresponding to the maintenance time points according to competitive product vitality data of different years and competition strategies of different years;
c. generating a maintenance strategy according to the maintenance time points and the corresponding maintenance target values;
d. and changing the preset maintenance threshold value, and repeating the steps a to c until all the preset maintenance threshold values are traversed to obtain the different maintenance strategies.
4. The vehicle maintenance strategy determination method according to claim 3, wherein the determining the maintenance target value corresponding to each maintenance time point according to the competitive product vitality data of different years and the competitive strategy of different years comprises:
acquiring competitive product vitality data of different competitive products in different years, and determining normal logarithmic distribution data of the different competitive products in different years according to the competitive product vitality data;
determining the vitality degradation curves of the different competitive products in different years according to the normal logarithmic distribution data of the different competitive products in different years;
determining the vital force values of different competitive products at the same maintenance time point according to the vital force degradation curves of the competitive products, and obtaining a plurality of maintenance vital force values;
and determining the maintenance target values corresponding to the maintenance time points according to the plurality of maintenance vital force values and the competition strategies of the years corresponding to the maintenance time points so as to determine the maintenance target values corresponding to the maintenance time points.
5. The vehicle maintenance strategy determination method according to claim 4, wherein the determining of the maintenance target value corresponding to the maintenance time point according to the plurality of maintenance vital values and the competition strategy of the maintenance time point corresponding to the year comprises:
determining a target life maintenance cost required to maintain the vital force value of the vehicle to each of the maintenance vital force values;
determining whether each of the target life maintenance costs meets the requirements of the competitive strategy for the corresponding year;
and if the target life maintenance cost meets the requirement of the competitive strategy of the corresponding year, taking the target life maintenance cost as the maintenance target value.
6. The vehicle maintenance strategy determination method of claim 2 wherein said obtaining a plurality of predetermined maintenance thresholds comprises:
acquiring preset maintenance data of the vehicle, wherein the preset maintenance data comprise preset maintenance threshold values of the vehicle in different years;
and determining preset maintenance threshold values of the vehicle in different years in the preset maintenance data.
7. The vehicle maintenance strategy determination method of any one of claims 1-6, wherein determining the vehicle life degradation curves for different years using a regression analysis method based on normal log distribution data of the vehicle for different years comprises:
performing probability reliability degradation solving on the vitality of the vehicle based on normal logarithmic distribution data of the vehicle in different years, and determining reliability indexes of the vitality data of the vehicle in different years;
and performing regression analysis on the reliability indexes of different years to obtain a vehicle vitality degradation curve of the vehicle.
8. A vehicle maintenance strategy determination apparatus, comprising:
the acquisition module is used for acquiring vehicle vitality data of different years and determining normal logarithmic distribution data of the vehicle in different years according to the vehicle vitality data of different years;
the determining module is used for determining a vehicle life force degradation curve by adopting a regression analysis method based on normal logarithmic distribution data of the vehicle in different years, wherein the vehicle life force degradation curve is used for representing life force attenuation trend of the vehicle;
and the calculation module is used for performing simulation calculation on the maintenance cost required by the vehicle in the maintenance of different maintenance strategies according to the vehicle vitality degradation curve to obtain a target maintenance strategy meeting a preset cost condition.
9. A computer arrangement comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the steps of the vehicle maintenance strategy method according to any one of claims 1 to 7 when executing the computer program.
10. A computer-readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the vehicle maintenance strategy method according to any one of claims 1 to 7.
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| CN202110694357.4A CN115222439A (en) | 2021-06-22 | 2021-06-22 | Vehicle maintenance strategy method and device, computer equipment and storage medium |
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| CN202110694357.4A CN115222439A (en) | 2021-06-22 | 2021-06-22 | Vehicle maintenance strategy method and device, computer equipment and storage medium |
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