CN115681362A - NVH (noise vibration and harshness) control method and system of double-clutch transmission based on road load spectrum - Google Patents
NVH (noise vibration and harshness) control method and system of double-clutch transmission based on road load spectrum Download PDFInfo
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Abstract
The invention provides a method and a system for controlling a dual-clutch transmission NVH (noise, vibration and harshness) based on a road load spectrum, wherein the method comprises the following steps: establishing a domestic road load spectrum according to the road condition data and the driving preference data; optimizing control logic of the dual clutch transmission; judging whether operation noise exists under a preset working condition; carrying out noise analysis on the operation noise, and judging whether gear squeaking noise or gear knocking noise exists or not; when gear squeaking noise exists, evaluating the gear squeaking noise to determine gear squeaking characteristics, and optimizing control logics of a bearing gear and a gear of a pre-selected gear in the double-clutch transmission; when gear rattle noise is present, the gear rattle noise is evaluated to determine vehicle rattle characteristics, optimizing control logic for the dual clutch transmission hollow sleeve gear and the pre-selected range gear. The NVH of the double-clutch transmission can be effectively controlled based on the domestic road environment, so that the double-clutch transmission is more suitable for the domestic road environment.
Description
Technical Field
The invention relates to the technical field of transmissions, in particular to a method and a system for controlling NVH (noise, vibration and harshness) of a dual-clutch transmission based on a road load spectrum.
Background
Dual Clutch automatic Transmissions (DCT), one type of automatic transmission, are classified into dry and wet Dual Clutch Transmissions according to whether a Clutch module requires lubrication.
However, almost all DCT transmissions are developed by european manufacturers or third-party engineering consultants, and the load spectrums used in the development process are all load spectrums under the conditions of large-throttle large-torque violent driving mode and good road traffic conditions in europe, and the DCT transmissions developed by using the load spectrums basically have no noise and vibration problems when being driven on european drivers and european roads.
However, since the small throttle, the low-torque driving mode and the relatively congested traffic road conditions of domestic consumers are greatly different from those of the european market, the DCT transmission developed on the basis of the european market has an obvious phenomenon of water and soil inadequacy when running on the domestic road, and generates various squeaking sounds.
Disclosure of Invention
Based on the above, the invention aims to provide a method and a system for controlling the NVH of a dual-clutch transmission based on a road load spectrum, and aims to effectively control the NVH of the dual-clutch transmission based on a domestic road environment so as to be more suitable for the domestic road environment.
A first aspect of the invention provides a method for dual clutch transmission NVH control based on road load spectrum, the method comprising:
acquiring road condition data of a domestic road, acquiring driving preference data of a driver on the domestic road, and establishing a domestic road load spectrum according to the road condition data and the driving preference data;
optimizing the control logic of the double-clutch transmission according to the domestic road load spectrum, wherein the control strategy of the double-clutch transmission comprises a pre-shift control strategy, a shift point control strategy, a double-clutch control strategy and a gear engaging mechanism control strategy;
carrying out bench NVH test verification on the dual-clutch transmission, carrying out vehicle completion NVH test verification on the target vehicle carrying the dual-clutch transmission, and judging whether the dual-clutch transmission on the target vehicle has operation noise under a preset working condition;
performing noise analysis on the operation noise, and judging whether gear squeaking noise or gear knocking noise exists or not;
when the gear squeaking noise exists, evaluating the gear squeaking noise through a gear squeaking evaluation model to determine gear squeaking characteristics, and optimizing control logics of a bearing gear and a gear with a preselected gear in the dual-clutch transmission according to the gear squeaking characteristics and an optimization strategy corresponding to the gear squeaking characteristics;
and when the gear knocking noise exists, evaluating the gear knocking noise through a gear knocking evaluation model to determine the vehicle knocking characteristic, and optimizing the control logic of the hollow sleeve gear and the pre-selected gear of the dual-clutch transmission according to the vehicle knocking characteristic and the corresponding optimization strategy.
According to one aspect of the above technical solution, before the steps of obtaining road condition data of a domestic road, obtaining driving preference data of a driver on the domestic road, and establishing a domestic road load spectrum according to the road condition data and the driving preference data, the method further comprises:
acquiring road condition data of a domestic road and driving preference data of a driver on the domestic road according to a preset test rule;
in the test process, the engine torque, the engine speed, the clutch torque and the input shaft speed of the clutch are obtained.
According to one aspect of the technical scheme, the collected types of domestic roads comprise urban roads, national roads, expressways and mountain roads.
According to one aspect of the above technical solution, the step of optimizing the control logic of the dual clutch transmission according to the domestic road load spectrum specifically includes:
optimizing a pre-shift control strategy of the dual clutch transmission according to gear operation data and torque distribution data in the domestic road load spectrum;
optimizing a gear shifting point control strategy of the dual clutch transmission according to the gear operation data and the torque distribution data;
optimizing a double-clutch control strategy of the double-clutch transmission according to the gear operation data and the torque distribution data;
and optimizing a gear shifting mechanism control strategy of the dual-clutch transmission according to the gear operation data and the torque distribution data.
According to one aspect of the above technical solution, the step of performing noise analysis on the operation noise and determining whether there is gear squealing noise or gear rattling noise specifically includes:
performing noise analysis on the operating noise to determine an audio characteristic of the operating noise;
comparing the audio characteristics of the gear squeaking noise with the audio characteristics of the running noise according to the audio characteristics, and judging whether the gear squeaking noise exists in the running noise;
and comparing the audio frequency characteristics of the gear knocking noise with the audio frequency characteristics of the running noise according to the audio frequency characteristics, and judging whether the running noise contains the gear knocking noise or not.
According to one aspect of the above technical solution, the step of establishing the gear squeal evaluation model includes:
acquiring three-dimensional structure data of the dual-clutch transmission and historical noise data of gear squeaking noise;
and establishing the gear squeal evaluation model according to the three-dimensional structure data and the historical noise data.
According to one aspect of the above technical solution, the step of establishing the gear rattle evaluation model includes:
acquiring actual output angular acceleration of the engine, a double-clutch torsional vibration amplitude, a dragging torque and axial and torsional backlash;
and establishing the gear knocking evaluation model according to the actual output angular acceleration of the engine, the torsional vibration amplitude of the double clutches, the dragging torque and the axial and torsional backlash.
A second aspect of the present invention provides a dual clutch transmission NVH control system based on road load spectrum, the method comprising:
the load spectrum establishing module is used for acquiring road condition data of domestic roads, acquiring driving preference data of a driver on the domestic roads, and establishing a domestic road load spectrum according to the road condition data and the driving preference data;
the strategy optimization module is used for optimizing the control logic of the double-clutch transmission according to the domestic road load spectrum, wherein the control strategy of the double-clutch transmission comprises a pre-shifting control strategy, a shifting point control strategy, a double-clutch control strategy and a gear engaging mechanism control strategy;
the test module is used for carrying out bench NVH test verification on the dual-clutch transmission, carrying out whole vehicle NVH test verification on the target vehicle carrying the dual-clutch transmission and judging whether the dual-clutch transmission on the target vehicle has operation noise under a preset working condition;
the noise analysis module is used for carrying out noise analysis on the operation noise and judging whether gear squeaking noise or gear knocking noise exists or not;
the gear squealing strategy optimization module is used for evaluating the gear squealing noise through a gear squealing evaluation model to determine gear squealing characteristics when the gear squealing noise exists, and optimizing control logics of a bearing gear and a pre-selected gear in the double-clutch transmission according to the gear squealing characteristics and a corresponding optimization strategy;
and the gear knocking strategy optimization module is used for evaluating the gear knocking noise through a gear knocking evaluation model to determine the vehicle knocking characteristics when the gear knocking noise exists, and optimizing the control logic of the hollow sleeve gear and the pre-selected gear of the dual-clutch transmission according to the vehicle knocking characteristics and the corresponding optimization strategy.
A third aspect of the present invention is to provide a computer-readable storage medium, on which computer instructions are stored, which instructions, when executed by a processor, implement the steps of the method described in the above technical solution.
A fourth aspect of the present invention provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the method according to the above technical solution when executing the program.
Compared with the prior art, the NVH control method and the NVH control system of the double-clutch transmission based on the road load spectrum have the advantages that:
the method comprises the steps of establishing a domestic road load spectrum by acquiring road condition data of a domestic road and driving preference data of a user, optimizing control logic of the double-clutch transmission based on the road load spectrum, wherein the control logic comprises a pre-gear-selection control strategy, a gear-shifting point control strategy, a double-clutch control strategy and a gear-shifting mechanism control strategy, adjusting and optimizing at least one or more control strategies, performing an NVH test on the double-clutch transmission and a target vehicle carrying the double-clutch transmission, judging whether gear squeal noise and gear knocking noise exist or not, and optimizing the control strategy of the double-clutch transmission again if the gear squeal noise and the gear knocking noise exist, so that the operation logic of the double-clutch transmission is more consistent with the domestic road environment through the reciprocating NVH test and parameter optimization, the gear squeal noise and the gear knocking noise are avoided from being generated in the operation process of the double-clutch transmission as much as possible, and the use experience of the double-clutch transmission can be improved.
Drawings
FIG. 1 is a schematic flow chart of a dual clutch transmission NVH control method based on road load spectrum according to a first embodiment of the present invention;
FIG. 2 is a block diagram of a dual clutch transmission NVH control system based on road load spectrum according to a third embodiment of the present invention;
the following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Several embodiments of the invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example one
Referring to fig. 1, a first embodiment of the present invention provides a dual clutch transmission NVH control method based on a road load spectrum, the method comprising steps S10-S60:
and S10, acquiring road condition data of the domestic road, acquiring driving preference data of a driver on the domestic road, and establishing a domestic road load spectrum according to the road condition data and the driving preference data.
The road condition data of the domestic road includes, but is not limited to, straightness, curvature, gradient, signal lamp setting interval, sidewalk setting, road speed limit and the like of the road.
Specifically, the road condition data is acquired by a professional tester through actual driving of a test vehicle carrying a dual clutch transmission, and is acquired according to a plurality of road test cycles, wherein each road test cycle comprises a highway with a high driving speed, a national road and urban fast reading road with a medium driving speed, and an urban road and mountain road with a low driving speed, each road test cycle comprises the common road types, of course, other unusual roads can be included in other embodiments, and the test mileage of each road type can be set based on the driver travel result of big data statistics. In the test process of each road test cycle, the engine torque, the engine rotating speed, the clutch torque and the rotating speed of the input shaft of the clutch are obtained.
As shown in table 1, it is a road mileage distribution chart of each road test cycle in the road condition data.
TABLE 1 road mileage distribution
According to table 1, the types of the roads tested include national roads, urban roads, mountain roads and expressways, wherein the number of kilometers of the expressways is the largest, the percentage of kilometers is the largest, the national roads which are most suitable for daily commuting on and off duty are close to the number of kilometers of the urban roads, the percentage of kilometers is close to and moderate, and the number of kilometers of the mountain roads is smaller and the percentage of kilometers is smaller. That is, in the actual road test cycle, the road condition data is collected, and the travel habits or travel preferences of most users should be considered.
As shown in table 2, this is a comparison table of travel time and distance for each road condition.
TABLE 2 travel time and distance under each road condition
As can be seen from table 2, in an actual road test cycle, data acquisition is performed on multiple roads of the same type, such as national road 1, national road 2, national road 3, and national road 4, so as to obtain more comprehensive road condition data as much as possible.
The driving preference data is the driving habits of a plurality of users counted based on big data, for example, the road sections of the vehicles driven by the users can be heavily throttle-driven, and the road sections can be frequently braked, which will affect the gear shifting logic of the dual clutch transmission. For example, 2 into 3 or 3 out of 2.
And S20, optimizing the control logic of the double-clutch transmission according to the domestic road load spectrum, wherein the control strategies of the double-clutch transmission comprise a pre-shift control strategy, a shift point control strategy, a double-clutch control strategy and a gear engaging mechanism control strategy.
The domestic road load spectrum is obtained by counting based on domestic road condition data and driving preference data of a user, the domestic road load spectrum is developed based on a domestic special environment, and the dual-clutch transmission is developed based on the road load spectrum, so that the dual-clutch transmission is more suitable for the domestic road condition environment.
Specifically, the domestic road load spectrum is the operation data of the dual-clutch transmission in the operation process of the target vehicle, and the operation data comprises gear operation data and torque distribution data.
It should be noted that optimizing the control logic of the dual clutch transmission generally means recalibrating software of the dual clutch transmission to achieve optimization, and specifically, optimizing a pre-shift control strategy, a shift point control strategy, a dual clutch control strategy, and a shift mechanism control strategy of the dual clutch transmission at the same time, or optimizing one or more of the control strategies.
In the present embodiment, the control logic of the dual clutch transmission is optimized, including:
optimizing a pre-shift control strategy of the dual clutch transmission according to gear operation data and torque distribution data in the domestic road load spectrum;
optimizing a gear shifting point control strategy of the dual clutch transmission according to the gear operation data and the torque distribution data;
optimizing a double-clutch control strategy of the double-clutch transmission according to gear operation data and torque distribution data;
and optimizing a gear shifting mechanism control strategy of the dual-clutch transmission according to the gear operation data and the torque distribution data.
And S30, carrying out rack NVH test verification on the dual-clutch transmission, carrying out whole vehicle NVH test verification on the target vehicle with the dual-clutch transmission, and judging whether the dual-clutch transmission on the target vehicle has operation noise under a preset working condition.
The test verification of the rack NVH test on the double-clutch transmission refers to the fact that a single double-clutch transmission is placed on a test rack to be tested and is driven by an engine or other driving devices, sound in the running process of the double-clutch transmission is picked up through recording equipment, and whether running noise exists under a certain working condition or not is judged, for example, whether running noise exists in the process of gear switching such as the process of switching 2 gears into 3 gears or not is judged.
And carrying out platform NVH test verification on a target vehicle provided with the dual clutch transmission, driving the dual clutch transmission to operate by an engine, picking up sound in the operation process of the dual clutch transmission through a recording device, and judging whether operation noise exists under a certain working condition, such as whether the operation noise exists in the process of gear switching, such as 2-gear switching, 3-gear switching and the like.
And S40, carrying out noise analysis on the operation noise, and judging whether gear squeaking noise or gear knocking noise exists or not.
In the embodiment, when the operating noise of the dual clutch transmission in the operating process is picked up, the noise analyzer is used for carrying out noise analysis on the operating noise to judge whether the operating noise contains the gear squeaking noise and the gear knocking noise expressed by NVH.
If there is a gear squeal noise, the method shown in the present embodiment proceeds to step S50, and if there is a gear rattle noise, the method shown in the present embodiment directly proceeds to step S60, and if there is both, the method proceeds to step S50 and step S60 in order.
And S50, evaluating the gear squeal noise through a gear squeal evaluation model to determine gear squeal characteristics, and optimizing control logics of a bearing gear and a gear with a pre-selected gear in the dual-clutch transmission according to the gear squeal characteristics and an optimization strategy corresponding to the gear squeal characteristics.
The gear squeal evaluation model is used for evaluating gear squeal noise, determining the gear squeal characteristics of the gear squeal noise, and optimizing control logics of a carrier gear and a gear with a pre-selected gear in the dual-clutch transmission according to the gear squeal characteristics and a preset optimization strategy, for example, 3-gear is set to be a neutral gear within 1500rpm, and 2-gear squeal can be avoided.
And S60, evaluating the gear knocking noise through a gear knocking evaluation model to determine vehicle knocking characteristics, and optimizing control logics of the hollow sleeve gear of the double-clutch transmission and a gear with a preselected gear according to the vehicle knocking characteristics and an optimization strategy corresponding to the vehicle knocking characteristics.
The gear knocking evaluation model is used for evaluating vehicle knocking noise, determining the gear knocking characteristics of the gear squeaking noise, and optimizing control logics of a hollow sleeve gear and a pre-selected gear of the dual-clutch transmission according to the gear knocking characteristics and preset optimization logics of the gear knocking characteristics, for example, increasing the micro-sliding friction of a clutch, and having an obvious inhibiting effect on the knocking noise of the dual-clutch transmission.
In conclusion, the method for controlling the dual-clutch transmission NVH based on the road load spectrum, which is disclosed by the embodiment, has the beneficial effects that:
the method comprises the steps of establishing a domestic road load spectrum by collecting road condition data of a domestic road and driving preference data of a user, optimizing control logic of the double-clutch transmission based on the road load spectrum, wherein the control logic comprises a pre-gear-selection control strategy, a gear-shifting point control strategy, a double-clutch control strategy and a gear-shifting mechanism control strategy, adjusting and optimizing at least one or more control strategies, carrying out an NVH test on the double-clutch transmission and a target vehicle carrying the double-clutch transmission, judging whether gear squeal noise and gear knocking noise exist or not, and optimizing the control strategy of the double-clutch transmission again if the gear squeal noise and the gear knocking noise exist, so that the operation logic of the double-clutch transmission can better accord with the domestic road environment through the reciprocating NVH test and parameter optimization, the gear squeal noise and the gear knocking noise generated by the double-clutch transmission in the operation process can be avoided as much as possible, and the use experience of the double-clutch transmission can be improved.
Example two
A second embodiment of the present invention provides a method for NVH control of a dual clutch transmission based on road load spectrum, in the method shown in this embodiment:
the step of analyzing the running noise to judge whether gear squeaking noise or gear knocking noise exists includes the following steps:
performing noise analysis on the operating noise to determine an audio characteristic of the operating noise;
comparing the audio characteristics of the gear squeaking noise with the audio characteristics of the running noise according to the audio characteristics, and judging whether the gear squeaking noise exists in the running noise;
and comparing the audio frequency characteristics of the gear knocking noise with the audio frequency characteristics of the running noise according to the audio frequency characteristics, and judging whether the running noise contains the gear knocking noise or not.
And the establishment step of the gear squeal evaluation model comprises the following steps:
acquiring three-dimensional structure data of the dual-clutch transmission and historical noise data of gear squeaking noise;
and establishing the gear squeal evaluation model according to the three-dimensional structure data and the historical noise data.
The gear knocking evaluation model establishing step comprises the following steps:
acquiring actual output angular acceleration of the engine, a double-clutch torsional vibration amplitude, a dragging torque and axial and torsional backlash;
and establishing the gear knocking evaluation model according to the actual output angular acceleration of the engine, the torsional vibration amplitude of the double clutches, the dragging torque and the axial and torsional backlash.
By adopting the method for controlling the NVH of the dual-clutch transmission based on the road load spectrum, which is shown in the embodiment, the beneficial effects at least comprise that:
the method comprises the steps of establishing a domestic road load spectrum by acquiring road condition data of a domestic road and driving preference data of a user, optimizing control logic of the double-clutch transmission based on the road load spectrum, wherein the control logic comprises a pre-gear-selection control strategy, a gear-shifting point control strategy, a double-clutch control strategy and a gear-shifting mechanism control strategy, adjusting and optimizing at least one or more control strategies, performing an NVH test on the double-clutch transmission and a target vehicle carrying the double-clutch transmission, judging whether gear squeal noise and gear knocking noise exist or not, and optimizing the control strategy of the double-clutch transmission again if the gear squeal noise and the gear knocking noise exist, so that the operation logic of the double-clutch transmission is more consistent with the domestic road environment through the reciprocating NVH test and parameter optimization, the gear squeal noise and the gear knocking noise are avoided from being generated in the operation process of the double-clutch transmission as much as possible, and the use experience of the double-clutch transmission can be improved.
EXAMPLE III
Referring to fig. 2, a third embodiment of the present invention provides a dual clutch transmission NVH control system based on road load spectrum, the system comprising: the system comprises a load spectrum establishing module 10, a strategy optimizing module 20, a testing module 30, a noise analyzing module 40, a gear squeaking strategy optimizing module 50 and a gear knocking strategy optimizing module 60.
The load spectrum establishing module 10 is used for acquiring road condition data of a domestic road, acquiring driving preference data of a driver on the domestic road, and establishing a domestic road load spectrum according to the road condition data and the driving preference data.
The road condition data of the domestic road includes, but is not limited to, straightness, curvature, gradient, signal lamp setting interval, sidewalk setting, road speed limit and the like of the road.
Specifically, the road condition data is acquired by a professional tester through actual driving of a test vehicle carrying a dual clutch transmission, and is acquired according to a plurality of road test cycles, wherein each road test cycle comprises a highway with a high driving speed, a national road and urban fast reading road with a medium driving speed, and an urban road and mountain road with a low driving speed, each road test cycle comprises the common road types, of course, other unusual roads can be included in other embodiments, and the test mileage of each road type can be set based on the driver travel result of big data statistics. In the test process of each road test cycle, the engine torque, the engine rotating speed, the clutch torque and the rotating speed of the input shaft of the clutch are obtained.
The driving preference data is the driving habits of a plurality of users counted based on big data, for example, the section of the vehicle where the user drives is heavily accelerator-driven, and the section of the vehicle where the user frequently brakes, which affects the gear shifting logic of the dual clutch transmission. For example, 2 into 3 or 3 out of 2.
And a strategy optimization module 20, configured to optimize a control logic of the dual clutch transmission according to the domestic road load spectrum, where the control strategy of the dual clutch transmission includes a pre-shift control strategy, a shift point control strategy, a dual clutch control strategy, and a gear engaging mechanism control strategy.
The domestic road load spectrum is obtained by counting based on domestic road condition data and driving preference data of a user, the domestic road load spectrum is developed based on a domestic special environment, and the dual-clutch transmission is developed based on the road load spectrum, so that the dual-clutch transmission is more suitable for the domestic road condition environment.
Specifically, the domestic road load spectrum is the operation data of the dual-clutch transmission in the operation process of the target vehicle, and the operation data comprises gear operation data and torque distribution data.
It should be noted that optimizing the control logic of the dual clutch transmission generally means recalibrating software of the dual clutch transmission to achieve optimization, and specifically, optimizing a pre-shift control strategy, a shift point control strategy, a dual clutch control strategy, and a shift mechanism control strategy of the dual clutch transmission at the same time, or optimizing one or more of the control strategies.
In the present embodiment, the control logic of the dual clutch transmission is optimized, including:
optimizing a pre-shift control strategy of the dual clutch transmission according to gear operation data and torque distribution data in the domestic road load spectrum;
optimizing a gear shifting point control strategy of the dual clutch transmission according to the gear operation data and the torque distribution data;
optimizing a double-clutch control strategy of the double-clutch transmission according to gear operation data and torque distribution data;
and optimizing a gear shifting mechanism control strategy of the double-clutch transmission according to the gear operation data and the torque distribution data.
The test module 30 is configured to perform bench NVH test verification on the dual clutch transmission, perform vehicle-mounted NVH test verification on the target vehicle equipped with the dual clutch transmission, and determine whether the dual clutch transmission on the target vehicle has operation noise under a preset working condition.
The test verification of the rack NVH test on the double-clutch transmission refers to the fact that a single double-clutch transmission is placed on a test rack to be tested and is driven by an engine or other driving devices, sound in the running process of the double-clutch transmission is picked up through recording equipment, and whether running noise exists under a certain working condition or not is judged, for example, whether running noise exists in the process of gear switching such as the process of switching 2 gears into 3 gears or not is judged.
And carrying out platform NVH test verification on a target vehicle provided with the dual clutch transmission, driving the dual clutch transmission to operate by an engine, picking up sound in the operation process of the dual clutch transmission through a recording device, and judging whether operation noise exists under a certain working condition, such as whether the operation noise exists in the process of gear switching, such as 2-gear switching, 3-gear switching and the like.
And the noise analysis module 40 is used for performing noise analysis on the operation noise and judging whether gear squeal noise or gear knocking noise exists or not.
In the embodiment, when the running noise of the dual clutch transmission in the running process is picked up, the running noise is subjected to noise analysis by the noise analyzer, and whether the gear squeaking noise and the gear knocking noise expressed by NVH exist in the running noise is judged.
And the gear squeal strategy optimization module 50 is configured to evaluate the gear squeal noise through a gear squeal evaluation model to determine a gear squeal characteristic, and optimize control logic of a carrier gear and a gear of a preselected gear in the dual clutch transmission according to the gear squeal characteristic and an optimization strategy corresponding to the gear squeal characteristic.
The gear squeal evaluation model is used for evaluating gear squeal noise, determining the gear squeal characteristics of the gear squeal noise, and optimizing control logics of a carrier gear and a gear with a pre-selected gear in the dual-clutch transmission according to the gear squeal characteristics and a preset optimization strategy, for example, 3-gear is set to be a neutral gear within 1500rpm, and 2-gear squeal can be avoided.
And the gear knocking strategy optimizing module 60 is used for evaluating the gear knocking noise through a gear knocking evaluation model so as to determine vehicle knocking characteristics, and optimizing the control logic of the hollow sleeve gear and the pre-selected gear of the dual-clutch transmission according to the vehicle knocking characteristics and the corresponding optimizing strategy.
The gear knocking evaluation model is used for evaluating vehicle knocking noise, determining the gear knocking characteristics of the gear squeaking noise, and optimizing control logics of a hollow sleeve gear and a pre-selected gear of the dual-clutch transmission according to the gear knocking characteristics and preset optimization logics of the gear knocking characteristics, for example, increasing the micro-sliding friction of a clutch, and having an obvious inhibiting effect on the knocking noise of the dual-clutch transmission.
In conclusion, by adopting the dual-clutch transmission NVH control system based on the road load spectrum shown in the embodiment, the beneficial effects are that:
the method comprises the steps of establishing a domestic road load spectrum by acquiring road condition data of a domestic road and driving preference data of a user, optimizing control logic of the double-clutch transmission based on the road load spectrum, wherein the control logic comprises a pre-gear-selection control strategy, a gear-shifting point control strategy, a double-clutch control strategy and a gear-shifting mechanism control strategy, adjusting and optimizing at least one or more control strategies, performing an NVH test on the double-clutch transmission and a target vehicle carrying the double-clutch transmission, judging whether gear squeal noise and gear knocking noise exist or not, and optimizing the control strategy of the double-clutch transmission again if the gear squeal noise and the gear knocking noise exist, so that the operation logic of the double-clutch transmission is more consistent with the domestic road environment through the reciprocating NVH test and parameter optimization, the gear squeal noise and the gear knocking noise are avoided from being generated in the operation process of the double-clutch transmission as much as possible, and the use experience of the double-clutch transmission can be improved.
Example four
A fourth embodiment of the invention provides a computer readable storage medium having stored thereon computer instructions which, when executed by a processor, implement the steps of the method described in the above embodiments.
EXAMPLE five
A fifth embodiment of the invention provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the method in the above embodiments when executing the program.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (10)
1. A method of dual clutch transmission NVH control based on road load spectrum, the method comprising:
acquiring road condition data of a domestic road, acquiring driving preference data of a driver on the domestic road, and establishing a domestic road load spectrum according to the road condition data and the driving preference data;
optimizing the control logic of the double-clutch transmission according to the domestic road load spectrum, wherein the control strategy of the double-clutch transmission comprises a pre-shift control strategy, a shift point control strategy, a double-clutch control strategy and a gear engaging mechanism control strategy;
carrying out bench NVH test verification on the double-clutch transmission, carrying out whole vehicle NVH test verification on the target vehicle carrying the double-clutch transmission, and judging whether the double-clutch transmission on the target vehicle has running noise under a preset working condition;
carrying out noise analysis on the operation noise, and judging whether gear squeaking noise or gear knocking noise exists or not;
when the gear squeaking noise exists, evaluating the gear squeaking noise through a gear squeaking evaluation model to determine gear squeaking characteristics, and optimizing control logics of a bearing gear and a gear with a preselected gear in the dual-clutch transmission according to the gear squeaking characteristics and an optimization strategy corresponding to the gear squeaking characteristics;
and when the gear knocking noise exists, evaluating the gear knocking noise through a gear knocking evaluation model to determine the vehicle knocking characteristic, and optimizing the control logic of the hollow sleeve gear and the pre-selected gear of the dual-clutch transmission according to the vehicle knocking characteristic and the corresponding optimization strategy.
2. The dual-clutch transmission NVH control method based on the road load spectrum of claim 1, wherein before the steps of obtaining road condition data of a domestic road, obtaining driving preference data of a driver on the domestic road, and establishing the domestic road load spectrum according to the road condition data and the driving preference data, the method further comprises:
acquiring road condition data of domestic roads and driving preference data of drivers on the domestic roads according to preset test rules;
in the test process, the engine torque, the engine speed, the clutch torque and the input shaft speed of the clutch are obtained.
3. The dual-clutch transmission NVH control method based on the road load spectrum of claim 2, wherein the collected types of domestic roads comprise urban roads, national roads, expressways and mountain roads.
4. The method for controlling the NVH of the dual-clutch transmission based on the road load spectrum according to claim 3, wherein the step of optimizing the control logic of the dual-clutch transmission according to the domestic road load spectrum specifically comprises:
optimizing a pre-shift control strategy of the dual clutch transmission according to gear operation data and torque distribution data in the domestic road load spectrum;
optimizing a gear shifting point control strategy of the dual clutch transmission according to the gear operation data and the torque distribution data;
optimizing a double-clutch control strategy of the double-clutch transmission according to gear operation data and torque distribution data;
and optimizing a gear shifting mechanism control strategy of the double-clutch transmission according to the gear operation data and the torque distribution data.
5. The dual clutch transmission NVH control method based on the road load spectrum according to claim 4, wherein the step of performing noise analysis on the operation noise and judging whether gear squeal noise or gear rattle noise exists specifically comprises the steps of:
performing noise analysis on the operating noise to determine an audio characteristic of the operating noise;
according to the audio characteristics, comparing the audio characteristics of the gear howling noise with the audio characteristics of the running noise, and judging whether the gear howling noise exists in the running noise;
and comparing the audio frequency characteristics of the gear knocking noise with the audio frequency characteristics of the running noise according to the audio frequency characteristics, and judging whether the running noise contains the gear knocking noise or not.
6. The dual clutch transmission NVH control method based on road load spectrum according to any of claims 1-5, wherein the gear squawk estimation model establishing step comprises:
acquiring three-dimensional structure data of the dual-clutch transmission and historical noise data of gear squeaking noise;
and establishing the gear squeal evaluation model according to the three-dimensional structure data and the historical noise data.
7. The dual-clutch transmission NVH control method according to claim 6, wherein the gear rattle evaluation model establishing step comprises:
acquiring actual output angular acceleration of the engine, a double-clutch torsional vibration amplitude, a dragging torque and axial and torsional backlash;
and establishing the gear knocking evaluation model according to the actual output angular acceleration of the engine, the torsional vibration amplitude of the double clutches, the dragging torque and the axial and torsional backlash.
8. A dual clutch transmission NVH control system based on road load spectrum, the method comprising:
the load spectrum establishing module is used for acquiring road condition data of domestic roads, acquiring driving preference data of a driver on the domestic roads, and establishing a domestic road load spectrum according to the road condition data and the driving preference data;
the strategy optimization module is used for optimizing the control logic of the dual-clutch transmission according to the domestic road load spectrum, wherein the control strategy of the dual-clutch transmission comprises a pre-shift control strategy, a shift point control strategy, a dual-clutch control strategy and a gear engaging mechanism control strategy;
the test module is used for carrying out bench NVH test verification on the dual-clutch transmission, carrying out whole vehicle NVH test verification on the target vehicle carrying the dual-clutch transmission and judging whether the dual-clutch transmission on the target vehicle has operation noise under a preset working condition;
the noise analysis module is used for carrying out noise analysis on the operation noise and judging whether gear squeaking noise or gear knocking noise exists or not;
the gear squealing strategy optimization module is used for evaluating the gear squealing noise through a gear squealing evaluation model to determine gear squealing characteristics when the gear squealing noise exists, and optimizing the control logic of a bearing gear and a gear with a preselected gear in the dual-clutch transmission according to the gear squealing characteristics and the corresponding optimization strategy;
and the gear knocking strategy optimization module is used for evaluating the gear knocking noise through a gear knocking evaluation model to determine the vehicle knocking characteristics when the gear knocking noise exists, and optimizing the control logic of the hollow sleeve gear and the pre-selected gear of the dual-clutch transmission according to the vehicle knocking characteristics and the corresponding optimization strategy.
9. A computer-readable storage medium having stored thereon computer instructions, which when executed by a processor, perform the steps of the method of any one of claims 1 to 7.
10. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1-7 when executing the program.
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| CN202211179234.8A CN115681362A (en) | 2022-09-27 | 2022-09-27 | NVH (noise vibration and harshness) control method and system of double-clutch transmission based on road load spectrum |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211179234.8A CN115681362A (en) | 2022-09-27 | 2022-09-27 | NVH (noise vibration and harshness) control method and system of double-clutch transmission based on road load spectrum |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116341123A (en) * | 2023-05-30 | 2023-06-27 | 麦格纳动力总成(江西)有限公司 | Method and system for optimizing knocking noise of automobile gearbox |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116341123A (en) * | 2023-05-30 | 2023-06-27 | 麦格纳动力总成(江西)有限公司 | Method and system for optimizing knocking noise of automobile gearbox |
| CN116341123B (en) * | 2023-05-30 | 2023-08-11 | 麦格纳动力总成(江西)有限公司 | Method and system for optimizing knocking noise of automobile gearbox |
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