CN114323258A - Method and device for testing noise contribution amount of vehicle interior power assembly - Google Patents
Method and device for testing noise contribution amount of vehicle interior power assembly Download PDFInfo
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Abstract
The invention discloses a method and a device for testing the noise contribution amount of an in-vehicle power assembly, wherein the method comprises the following steps: acquiring total noise signals in a vehicle detected under different working conditions; analyzing the overall noise signal in the vehicle to obtain a plurality of overall noise sound pressure levels of the engine in the vehicle at different rotating speeds; determining the total noise sound pressure level in the vehicle and the noise sound pressure level of each subsystem in the power assembly in the vehicle according to the total noise sound pressure levels in the vehicle; and obtaining an in-vehicle total noise contribution curve and noise contribution curves of all subsystems in the in-vehicle power assembly through the in-vehicle total noise sound pressure level of the engine at different rotating speeds and the noise sound pressure levels of all subsystems in the in-vehicle power assembly. The method solves the problem that the accuracy of predicting the noise contribution component of the power assembly in the vehicle noise is not high in the prior art.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a method and a device for testing the noise contribution of an in-vehicle power assembly.
Background
With the rapid development of automobile technology, the contrast gap between the service performance and the safety performance of each large-brand automobile is continuously reduced. Meanwhile, with the continuous improvement of the quality and the demand of people's life, the requirement on the comfort of the automobile is continuously improved. The subdivision of the vibration and noise directions of the automobile in the comfort function often becomes one of the important driving factors for different brands of automobiles to meet the requirements of customers. For example, sports car brand automobiles pursue an acceleration working condition and have noise dynamic feeling in the automobiles; the high-end vehicle type of commercial affairs pursues the interior silence of acceleration condition car.
The power assembly is the heart of the automobile, is a source of all power of the automobile and is also a main source of noise in the automobile. And the noise source consists of various radiation noises such as an air inlet system, an exhaust system, an engine system and the like in the state of the whole vehicle. In order to form own automobile noise brand characteristics, automobile manufacturers of all brands control the proportion of contribution components of radiation noise of a power assembly in automobile noise. Therefore, how each host factory quickly diagnoses the contribution amount of the radiation noise of the power assembly in the noise in the vehicle according to the product development location in the product development of the host factory, and reasonably matches the noise component in the vehicle according to the contribution amount is a key factor for improving the unique noise characteristic of the brand and quickly occupying the market.
At present, in the automobile industry, the radiation noise of each system of the power assembly is mainly designed, developed and taught on the basis of a single system rack. For example: the radiation noise of the engine is based on the testing and teaching of the rack testing and controlling machine. However, the bench test of a single system cannot reach the complete normal driving condition of the whole vehicle. Therefore, the accuracy of predicting the powertrain noise contribution component in the in-vehicle noise is not high.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for testing a noise contribution amount of an in-vehicle powertrain, which aim to solve the problem in the prior art that the accuracy of predicting the noise contribution component of the in-vehicle powertrain is not high.
The embodiment of the invention is realized as follows: a method of testing an in-vehicle powertrain noise contribution amount, the method comprising:
acquiring total noise signals in a vehicle detected under different working conditions;
analyzing the overall noise signal in the vehicle to obtain a plurality of overall noise sound pressure levels of the engine in the vehicle at different rotating speeds;
determining the total noise sound pressure level in the vehicle and the noise sound pressure level of each subsystem in the power assembly in the vehicle according to the total noise sound pressure levels in the vehicle;
and obtaining an in-vehicle total noise contribution curve and noise contribution curves of all subsystems in the in-vehicle power assembly through the in-vehicle total noise sound pressure level of the engine at different rotating speeds and the noise sound pressure levels of all subsystems in the in-vehicle power assembly.
Further, the method for testing the noise contribution amount of the in-vehicle powertrain includes the steps of analyzing the in-vehicle total noise signal to obtain a plurality of in-vehicle total noise sound pressure levels of the engine at different rotation speeds:
and synthesizing the plurality of in-vehicle overall noise sound pressure levels to obtain the corresponding in-vehicle overall noise sound pressure level and the noise sound pressure level of each subsystem in the in-vehicle powertrain.
Further, the method for testing the noise contribution amount of the in-vehicle powertrain includes the steps of:
measuring and calculating noise signals of various positions in the vehicle in the process of accelerating the vehicle from a static state full throttle to the highest rotating speed of an engine;
measuring and calculating noise signals of various positions in the vehicle in the process that the vehicle accelerates from a static state full throttle to the highest rotating speed of an engine, wherein an auxiliary silencer is added at the opening of an exhaust tail pipe;
after the vehicle accelerates to the highest rotating speed of the engine, noise signals of all positions in the vehicle are measured and calculated in the process that the engine slides to 1000 rotating speeds with gears, wherein an oil path of the engine is in a cut-off state; the air inlet throttle valve is in a closed state, and the tail pipe is provided with a silencer;
after the vehicle accelerates to the highest rotating speed of the engine, noise signals of all positions in the vehicle are measured and calculated in the process that the engine slides to 1000 rotating speeds with gears, wherein an oil path of the engine is in a cut-off state; the air inlet throttle valve keeps an open-close state;
after the vehicle accelerates to the highest rotating speed of the engine, noise signals of all positions in the vehicle are measured and calculated in the process that the engine slides to 1000 rotating speeds with gears, wherein an oil path of the engine is in a cut-off state; the air inlet throttle valve is kept in an open-close state, and a silencer is arranged on the tail pipe.
Further, in the method for testing the noise contribution amount of the in-vehicle powertrain, the step of analyzing the in-vehicle total noise signal to obtain the sound pressure levels of the plurality of in-vehicle total noise signals of the engine at different rotation speeds further includes:
and analyzing the vehicle interior overall noise signal to obtain the sound pressure levels of a plurality of vehicle interior overall noises with different rotating speeds of the engine at different orders.
Further, the method for testing the noise contribution amount of the in-vehicle powertrain includes the steps of obtaining an in-vehicle total noise contribution amount curve and noise contribution amount curves of the subsystems in the in-vehicle powertrain by the in-vehicle total noise sound pressure level of the engine at different rotation speeds and the noise sound pressure levels of the subsystems in the in-vehicle powertrain:
and obtaining an in-vehicle total noise contribution curve and an in-vehicle power assembly noise contribution curve of each subsystem through the in-vehicle total noise sound pressure level of the engine under different orders and different rotating speeds and the noise sound pressure levels of each subsystem in the in-vehicle power assembly.
Further, the method for testing the noise contribution amount of the in-vehicle powertrain includes the steps of analyzing the in-vehicle total noise signal to obtain a plurality of in-vehicle total noise sound pressure levels of the engine at different rotation speeds:
and analyzing the total noise signal in the vehicle by using a window function through a preset frequency and a preset bandwidth.
Another object of the present invention is to provide an in-vehicle powertrain noise contribution amount testing apparatus, including:
the noise signal acquisition module is used for acquiring the total noise signals in the vehicle detected by the vehicle under different working conditions;
the first noise sound pressure level acquisition module is used for analyzing the overall noise signals in the vehicle to acquire a plurality of overall noise sound pressure levels in the vehicle under different rotating speeds of the engine;
the determining module is used for determining the total noise sound pressure level in the vehicle and the noise sound pressure level of each subsystem in the power assembly in the vehicle according to the total noise sound pressure levels in the vehicle;
and the first noise contribution curve acquisition module is used for acquiring an in-vehicle total noise contribution curve and noise contribution curves of all subsystems in the in-vehicle power assembly according to the in-vehicle total noise sound pressure level of the engine at different rotating speeds and the noise sound pressure levels of all subsystems in the in-vehicle power assembly.
Further, the device for testing the noise contribution of the in-vehicle powertrain is characterized in that the determining module is specifically configured to:
and synthesizing the plurality of in-vehicle overall noise sound pressure levels to obtain the corresponding in-vehicle overall noise sound pressure level and the noise sound pressure level of each subsystem in the in-vehicle powertrain.
Further, the device for testing the noise contribution amount of the in-vehicle powertrain specifically comprises a first noise sound pressure level obtaining module configured to:
measuring and calculating noise signals of various positions in the vehicle in the process of accelerating the vehicle from a static state full throttle to the highest rotating speed of an engine;
measuring and calculating noise signals of various positions in the vehicle in the process that the vehicle accelerates from a static state full throttle to the highest rotating speed of an engine, wherein an auxiliary silencer is added at the opening of an exhaust tail pipe;
after the vehicle accelerates to the highest rotating speed of the engine, noise signals of all positions in the vehicle are measured and calculated in the process that the engine slides to 1000 rotating speeds with gears, wherein an oil path of the engine is in a cut-off state; the air inlet throttle valve is in a closed state, and the tail pipe is provided with a silencer;
after the vehicle accelerates to the highest rotating speed of the engine, noise signals of all positions in the vehicle are measured and calculated in the process that the engine slides to 1000 rotating speeds with gears, wherein an oil path of the engine is in a cut-off state; the air inlet throttle valve keeps an open-close state;
after the vehicle accelerates to the highest rotating speed of the engine, noise signals of all positions in the vehicle are measured and calculated in the process that the engine slides to 1000 rotating speeds with gears, wherein an oil path of the engine is in a cut-off state; the air inlet throttle valve is kept in an open-close state, and a silencer is arranged on the tail pipe.
Further, the above-mentioned vehicle interior powertrain noise contribution amount testing device, wherein, the device still includes:
and the second noise sound pressure level acquisition module is used for analyzing the overall noise signal in the vehicle to acquire the sound pressure levels of a plurality of overall noises in the vehicle with different rotating speeds of the engine at different orders.
Further, the above-mentioned vehicle interior powertrain noise contribution amount testing device, wherein, the device still includes:
and the second noise contribution curve acquisition module is used for acquiring an in-vehicle total noise contribution curve and noise contribution curves of all subsystems in the in-vehicle power assembly according to the in-vehicle total noise sound pressure level of the engine at different orders and different rotating speeds and the noise sound pressure levels of all subsystems in the in-vehicle power assembly.
Further, the device for testing the noise contribution amount of the in-vehicle powertrain specifically comprises a first noise sound pressure level obtaining module configured to:
and analyzing the total noise signal in the vehicle by using a window function through a preset frequency and a preset bandwidth.
The invention completely simulates the normal running working condition of the whole vehicle by acquiring the total noise signal in the vehicle under different working conditions. Analyzing the total noise signals in the vehicle to obtain corresponding total noise sound pressure levels in the vehicle, and determining the total noise sound pressure levels in the vehicle and the noise sound pressure levels of all subsystems in the power assembly in the vehicle according to the total noise sound pressure levels in the vehicle; and an in-vehicle total noise contribution curve and noise contribution curves of all subsystems in the in-vehicle power assembly are obtained, the noise contribution components of the in-vehicle noise power assembly can be visually seen through the noise contribution curves, and the problem that in the prior art, the accuracy of predicting the noise contribution components of the in-vehicle noise power assembly is not high is solved.
Drawings
Fig. 1 is a schematic layout diagram of an in-vehicle noise collection microphone according to an embodiment of the present invention;
FIG. 2 is a flowchart of a method for testing the noise contribution of an in-vehicle powertrain according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating an analysis effect of the in-vehicle total noise contribution amount in the method for testing the in-vehicle powertrain noise contribution amount according to the first embodiment of the present invention;
FIG. 4 is a flowchart of a method for testing the noise contribution of an in-vehicle powertrain according to a first embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating an analysis effect of an in-vehicle 0.5-order noise contribution amount in a method for testing an in-vehicle powertrain noise contribution amount according to a second embodiment of the present invention;
FIG. 6 is a graph of in-vehicle order and total noise sound pressure level data in a method for testing the noise contribution of an in-vehicle powertrain according to a second embodiment of the present invention;
FIG. 7 is a block diagram of a noise contribution amount testing device of a vehicle interior powertrain 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 presented 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 types.
The following describes how to improve the accuracy of predicting the noise contribution component of the powertrain in the vehicle in detail with reference to the specific embodiments and the accompanying drawings.
Example one
Referring to fig. 1, a method for testing the noise contribution of an in-vehicle powertrain according to a first embodiment of the present invention includes steps S10-S13.
And step S10, acquiring the total noise signals in the vehicle detected under different working conditions.
The noise test sensor is arranged in the vehicle for collecting noise, for example, a noise collecting microphone, specifically, the noise collecting microphone is arranged in a manner as shown in fig. 2, and the noise collecting microphone is arranged in the external ear of the primary driver, the external ear of the secondary driver, the external ear of the left rear passenger and the external ear of the right rear passenger.
In addition, in some optional embodiments of the present invention, in order to improve the accuracy of noise collection, after the noise collection microphone is arranged, the sound source calibrator is used to calibrate the microphone, so as to ensure that the sensitivity of the microphone noise test is normal.
In order to obtain the noise of each subsystem of the in-vehicle powertrain, the total noise signal of the vehicle under different working conditions needs to be detected, specifically, the working conditions in the test process are as follows, and for convenience of identification and subsequent description, the following working conditions are sequentially recorded as state one, state two, state three, state four and state five.
Measuring and calculating noise signals of various positions in the vehicle in the process that the vehicle is accelerated from a static state full throttle to the maximum rotating speed of an engine in a first state;
measuring and calculating noise signals of various positions in the vehicle in the process of accelerating the vehicle from a static state full throttle to the maximum rotating speed of the engine, wherein an auxiliary silencer is added at the opening of an exhaust tail pipe;
measuring and calculating noise signals of each position in the vehicle in the process that the engine slides to 1000 rotating speeds with gears after the vehicle accelerates to the highest rotating speed of the engine, wherein an oil way of the engine is in a cut-off state; the air inlet throttle valve is in a closed state, and the tail pipe is provided with a silencer;
measuring and calculating noise signals of each position in the vehicle in the process that the engine slides to 1000 rotating speeds with gears after the vehicle accelerates to the highest rotating speed of the engine, wherein an oil way of the engine is in a cut-off state; the air inlet throttle valve keeps an open-close state;
measuring and calculating noise signals of each position in the vehicle in the process that the engine slides to 1000 rotating speeds with gears after the vehicle accelerates to the highest rotating speed of the engine, wherein an oil way of the engine is in a cut-off state; the air inlet throttle valve is kept in an open-close state, and a silencer is arranged on the tail pipe.
It should be noted that, in order to improve the accuracy of noise detection, tire noise is shielded under all conditions.
And step S11, analyzing the vehicle interior overall noise signal to obtain a plurality of vehicle interior overall noise sound pressure levels of the engine at different rotating speeds.
The sound pressure level of the total noise in the vehicle is obtained by analyzing the total noise signal in the vehicle, and the total noise signal in the vehicle is obtained by the engine of the vehicle in the process of accelerating, so that the corresponding total noise sound pressure level of the engine in different rotating speeds can be picked up.
Specifically, the total noise signal in the vehicle is analyzed by using a window function through a preset resolution and a preset bandwidth, when the method is specifically implemented, the preset bandwidth is 25600Hz, the preset resolution is 4Hz, the window function is a hanning window, and the right-collecting mode of the window function is an a-set right mode.
And step S12, determining the total noise sound pressure level in the vehicle and the noise sound pressure level of each subsystem in the vehicle power assembly according to the total noise sound pressure levels in the vehicle.
The total noise sound pressure level in the car is obtained under different working conditions, and the sound pressure of the car noise in different test states can be synthesized by using a noise sound pressure superposition principle to obtain corresponding noise sound pressure; for example, the "state one" test is the in-vehicle noise sound pressure level; the sound pressure level of the in-vehicle noise under the test of the state two is eliminated, and the sound pressure level of the in-vehicle noise under the test of the state one contributes to the radiation noise of the exhaust tail pipe; the sound pressure level of mechanical noise of the engine is tested in a state three; the sound pressure level of the noise in the vehicle under the test of the state five is removed from the sound pressure level of the noise in the vehicle under the test of the state three, and the sound pressure level of the noise in the vehicle under the test of the state five is the sound pressure level of the radiation noise of the air inlet system; the sound pressure level of the noise in the vehicle under the 'state one' test is removed from the sound pressure level of the noise in the vehicle under the 'state four' test, and the sound pressure level of the noise in the vehicle under the 'state one' test is the sound pressure level of the combustion noise of the engine.
And step S13, obtaining an in-vehicle total noise contribution curve and an in-vehicle power assembly noise contribution curve of each subsystem through the in-vehicle total noise sound pressure level of the engine at different rotating speeds and the noise sound pressure levels of each subsystem in the in-vehicle power assembly.
And the in-vehicle total noise contribution curve is used as a contribution analysis reference. The noise sound pressure level of any noise contribution curve in the vehicle total noise contribution curve is within the range of 3db (a) or greater than the noise sound pressure level of the vehicle total noise contribution curve, that is, the noise sound pressure level is the main contribution factor of the vehicle interior noise, as shown in fig. 3, the main contribution factor affecting the vehicle interior noise in the vehicle state can be visually seen through the noise contribution curve.
In summary, according to the method for testing the noise contribution amount of the in-vehicle powertrain in the above embodiment of the invention, the in-vehicle total noise signal in the vehicle is acquired under different working conditions, so that the normal running working condition of the entire vehicle is completely simulated. Analyzing the total noise signals in the vehicle to obtain corresponding total noise sound pressure levels in the vehicle, and determining the total noise sound pressure levels in the vehicle and the noise sound pressure levels of all subsystems in the power assembly in the vehicle according to the total noise sound pressure levels in the vehicle; and an in-vehicle total noise contribution curve and noise contribution curves of all subsystems in the in-vehicle power assembly are obtained, the noise contribution components of the in-vehicle noise power assembly can be visually seen through the noise contribution curves, and the problem that in the prior art, the accuracy of predicting the noise contribution components of the in-vehicle noise power assembly is not high is solved.
Example two
Referring to fig. 4, a method for testing the noise contribution of the vehicle powertrain according to the second embodiment of the present invention includes steps S20-S23.
And step S20, acquiring the total noise signals in the vehicle detected under different working conditions.
And step S21, analyzing the vehicle interior overall noise signal to obtain the sound pressure levels of a plurality of vehicle interior overall noises with different rotating speeds of the engine at different orders.
In order to further improve the breadth of the noise test, the sound pressure levels of a plurality of in-vehicle total noises of different rotation speeds of the engine in different orders are obtained, and because the orders of the engine required by each type of vehicle are different, for example, most types of vehicles only need noise contributions of the engine in 2, 4 and 6 orders, so that only a main analysis needs to be carried out on noise contribution factors in the order, as shown in fig. 5 and 6, the main contribution quantity of the in-vehicle 0.5 order noise is analyzed to be engine combustion noise through the graph.
And step S22, determining the total noise sound pressure level in the vehicle and the noise sound pressure level of each subsystem in the vehicle power assembly according to the total noise sound pressure levels in the vehicle.
And step S23, obtaining an in-vehicle total noise contribution curve and an in-vehicle power assembly noise contribution curve of each subsystem through the in-vehicle total noise sound pressure level of the engine under different orders and different rotating speeds and the noise sound pressure levels of each subsystem in the in-vehicle power assembly.
The main noise contribution factors of the vehicle under different orders can be visually seen through the vehicle interior total noise contribution curve and the noise contribution curves of all subsystems in the vehicle interior power assembly.
In summary, according to the method for testing the noise contribution amount of the in-vehicle powertrain in the above embodiment of the invention, the in-vehicle total noise signal in the vehicle is acquired under different working conditions, so that the normal running working condition of the entire vehicle is completely simulated. Analyzing the total noise signals in the vehicle to obtain corresponding total noise sound pressure levels in the vehicle, and determining the total noise sound pressure levels in the vehicle and the noise sound pressure levels of all subsystems in the power assembly in the vehicle according to the total noise sound pressure levels in the vehicle; and an in-vehicle total noise contribution curve and noise contribution curves of all subsystems in the in-vehicle power assembly are obtained, the noise contribution components of the in-vehicle noise power assembly can be visually seen through the noise contribution curves, and the problem that in the prior art, the accuracy of predicting the noise contribution components of the in-vehicle noise power assembly is not high is solved.
EXAMPLE III
Referring to fig. 7, a device for testing a noise contribution of an in-vehicle powertrain according to a fourth embodiment of the present invention is shown, the device including:
the noise signal acquisition module 100 is configured to acquire an in-vehicle total noise signal detected by a vehicle under different working conditions;
a first noise sound pressure level obtaining module 200, configured to analyze the in-vehicle total noise signal to obtain a plurality of in-vehicle total noise sound pressure levels of the engine at different rotation speeds;
a determining module 300, configured to determine, according to the multiple in-vehicle overall noise sound pressure levels, the in-vehicle overall noise sound pressure level and noise sound pressure levels of subsystems in an in-vehicle powertrain;
the first noise contribution curve obtaining module 400 is configured to obtain an in-vehicle total noise contribution curve and noise contribution curves of various subsystems in the in-vehicle powertrain according to the in-vehicle total noise sound pressure level of the engine at different rotation speeds and the noise sound pressure levels of the various subsystems in the in-vehicle powertrain.
Further, in the above device for testing the noise contribution amount of the in-vehicle powertrain, the determining module 300 is specifically configured to:
and synthesizing the plurality of in-vehicle overall noise sound pressure levels to obtain the corresponding in-vehicle overall noise sound pressure level and the noise sound pressure level of each subsystem in the in-vehicle powertrain.
Further, the device for testing the noise contribution amount of the in-vehicle powertrain specifically comprises a first noise sound pressure level obtaining module configured to:
measuring and calculating noise signals of various positions in the vehicle in the process of accelerating the vehicle from a static state full throttle to the highest rotating speed of an engine;
measuring and calculating noise signals of various positions in the vehicle in the process that the vehicle accelerates from a static state full throttle to the highest rotating speed of an engine, wherein an auxiliary silencer is added at the opening of an exhaust tail pipe;
after the vehicle accelerates to the highest rotating speed of the engine, noise signals of all positions in the vehicle are measured and calculated in the process that the engine slides to 1000 rotating speeds with gears, wherein an oil path of the engine is in a cut-off state; the air inlet throttle valve is in a closed state, and the tail pipe is provided with a silencer;
after the vehicle accelerates to the highest rotating speed of the engine, noise signals of all positions in the vehicle are measured and calculated in the process that the engine slides to 1000 rotating speeds with gears, wherein an oil path of the engine is in a cut-off state; the air inlet throttle valve keeps an open-close state;
after the vehicle accelerates to the highest rotating speed of the engine, noise signals of all positions in the vehicle are measured and calculated in the process that the engine slides to 1000 rotating speeds with gears, wherein an oil path of the engine is in a cut-off state; the air inlet throttle valve is kept in an open-close state, and a silencer is arranged on the tail pipe.
Further, the above-mentioned vehicle interior powertrain noise contribution amount testing device, wherein, the device still includes:
and a second noise sound pressure level obtaining module 500, configured to analyze the vehicle interior total noise signal to obtain sound pressure levels of a plurality of vehicle interior total noises with different rotation speeds of the engine at different orders.
Further, the above-mentioned vehicle interior powertrain noise contribution amount testing device, wherein, the device still includes:
the second noise contribution curve obtaining module 600 is configured to obtain an in-vehicle total noise contribution curve and noise contribution curves of various subsystems in the in-vehicle powertrain according to the in-vehicle total noise sound pressure level of the engine at different orders and different rotation speeds and the noise sound pressure levels of various subsystems in the in-vehicle powertrain.
Further, in the above device for testing the noise contribution amount of the in-vehicle powertrain, the first noise sound pressure level obtaining module 200 is specifically configured to:
and analyzing the total noise signal in the vehicle by using a window function through a preset frequency and a preset bandwidth.
The functions or operation steps of the above modules when executed are substantially the same as those of the above method embodiments, and are not described herein again.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
Those of skill in the art will understand that the logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be viewed as implementing logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.
More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
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, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A method for testing the noise contribution of an in-vehicle powertrain, the method comprising:
acquiring total noise signals in a vehicle detected under different working conditions;
analyzing the overall noise signal in the vehicle to obtain a plurality of overall noise sound pressure levels of the engine in the vehicle at different rotating speeds;
determining the total noise sound pressure level in the vehicle and the noise sound pressure level of each subsystem in the power assembly in the vehicle according to the total noise sound pressure levels in the vehicle;
and obtaining an in-vehicle total noise contribution curve and noise contribution curves of all subsystems in the in-vehicle power assembly through the in-vehicle total noise sound pressure level of the engine at different rotating speeds and the noise sound pressure levels of all subsystems in the in-vehicle power assembly.
2. The method for testing the noise contribution of the in-vehicle powertrain of claim 1, wherein the step of analyzing the in-vehicle total noise signal to obtain a plurality of in-vehicle total noise sound pressure levels of the engine at different rotational speeds comprises:
and synthesizing the plurality of in-vehicle overall noise sound pressure levels to obtain the corresponding in-vehicle overall noise sound pressure level and the noise sound pressure level of each subsystem in the in-vehicle powertrain.
3. The method for testing the noise contribution of the in-vehicle powertrain according to claim 1, wherein the step of obtaining the in-vehicle total noise signal detected by the vehicle under different operating conditions comprises:
measuring and calculating noise signals of various positions in the vehicle in the process of accelerating the vehicle from a static state full throttle to the highest rotating speed of an engine;
measuring and calculating noise signals of various positions in the vehicle in the process that the vehicle accelerates from a static state full throttle to the highest rotating speed of an engine, wherein an auxiliary silencer is added at the opening of an exhaust tail pipe;
after the vehicle accelerates to the highest rotating speed of the engine, noise signals of all positions in the vehicle are measured and calculated in the process that the engine slides to 1000 rotating speeds with gears, wherein an oil path of the engine is in a cut-off state; the air inlet throttle valve is in a closed state, and the tail pipe is provided with a silencer;
after the vehicle accelerates to the highest rotating speed of the engine, noise signals of all positions in the vehicle are measured and calculated in the process that the engine slides to 1000 rotating speeds with gears, wherein an oil path of the engine is in a cut-off state; the air inlet throttle valve keeps an open-close state;
after the vehicle accelerates to the highest rotating speed of the engine, noise signals of all positions in the vehicle are measured and calculated in the process that the engine slides to 1000 rotating speeds with gears, wherein an oil path of the engine is in a cut-off state; the air inlet throttle valve is kept in an open-close state, and a silencer is arranged on the tail pipe.
4. The method for testing the noise contribution of an in-vehicle powertrain of claim 1, wherein the step of analyzing the in-vehicle total noise signal to obtain a plurality of in-vehicle total noise sound pressure levels of the engine at different rotational speeds further comprises:
and analyzing the vehicle interior overall noise signal to obtain the sound pressure levels of a plurality of vehicle interior overall noises with different rotating speeds of the engine at different orders.
5. The method for testing the noise contribution amount of the in-vehicle powertrain according to claim 4, wherein the step of obtaining the curve of the total noise contribution amount of the in-vehicle and the curve of the noise contribution amount of each subsystem of the in-vehicle powertrain by using the total noise sound pressure level of the in-vehicle and the noise sound pressure level of each subsystem of the in-vehicle powertrain at different rotation speeds of the engine comprises:
and obtaining an in-vehicle total noise contribution curve and an in-vehicle power assembly noise contribution curve of each subsystem through the in-vehicle total noise sound pressure level of the engine under different orders and different rotating speeds and the noise sound pressure levels of each subsystem in the in-vehicle power assembly.
6. The method for testing the noise contribution of the in-vehicle powertrain of claim 1, wherein the step of analyzing the in-vehicle total noise signal to obtain a plurality of in-vehicle total noise sound pressure levels of the engine at different rotational speeds comprises:
and analyzing the total noise signal in the vehicle by using a window function through a preset frequency and a preset bandwidth.
7. A device for testing the noise contribution amount of a vehicle interior power assembly is characterized by comprising:
the noise signal acquisition module is used for acquiring the total noise signals in the vehicle detected by the vehicle under different working conditions;
the first noise sound pressure level acquisition module is used for analyzing the overall noise signals in the vehicle to acquire a plurality of overall noise sound pressure levels in the vehicle under different rotating speeds of the engine;
the determining module is used for determining the total noise sound pressure level in the vehicle and the noise sound pressure level of each subsystem in the power assembly in the vehicle according to the total noise sound pressure levels in the vehicle;
and the first noise contribution curve acquisition module is used for acquiring an in-vehicle total noise contribution curve and noise contribution curves of all subsystems in the in-vehicle power assembly according to the in-vehicle total noise sound pressure level of the engine at different rotating speeds and the noise sound pressure levels of all subsystems in the in-vehicle power assembly.
8. The in-vehicle powertrain noise contribution testing device of claim 7, wherein the determining module is specifically configured to:
and synthesizing the plurality of in-vehicle overall noise sound pressure levels to obtain the corresponding in-vehicle overall noise sound pressure level and the noise sound pressure level of each subsystem in the in-vehicle powertrain.
9. The in-vehicle powertrain noise contribution amount testing device according to claim 7, wherein the noise sound pressure level obtaining module further includes:
measuring and calculating noise signals of various positions in the vehicle in the process of accelerating the vehicle from a static state full throttle to the highest rotating speed of an engine;
measuring and calculating noise signals of various positions in the vehicle in the process that the vehicle accelerates from a static state full throttle to the highest rotating speed of an engine, wherein an auxiliary silencer is added at the opening of an exhaust tail pipe;
after the vehicle accelerates to the highest rotating speed of the engine, noise signals of all positions in the vehicle are measured and calculated in the process that the engine slides to 1000 rotating speeds with gears, wherein an oil path of the engine is in a cut-off state; the air inlet throttle valve is in a closed state, and the tail pipe is provided with a silencer;
after the vehicle accelerates to the highest rotating speed of the engine, noise signals of all positions in the vehicle are measured and calculated in the process that the engine slides to 1000 rotating speeds with gears, wherein an oil path of the engine is in a cut-off state; the air inlet throttle valve keeps an open-close state;
after the vehicle accelerates to the highest rotating speed of the engine, noise signals of all positions in the vehicle are measured and calculated in the process that the engine slides to 1000 rotating speeds with gears, wherein an oil path of the engine is in a cut-off state; the air inlet throttle valve is kept in an open-close state, and a silencer is arranged on the tail pipe.
10. The in-vehicle powertrain noise contribution amount testing device according to claim 7, characterized by further comprising:
and the second noise sound pressure level acquisition module is used for analyzing the overall noise signal in the vehicle to acquire the sound pressure levels of a plurality of overall noises in the vehicle with different rotating speeds of the engine at different orders.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393246A (en) * | 2011-10-22 | 2012-03-28 | 重庆长安汽车股份有限公司 | Noise evaluation method for automobile generator under finished automobile state |
| CN102494754A (en) * | 2011-12-20 | 2012-06-13 | 重庆长安汽车股份有限公司 | Rapid identification method of noise source contributions in car based on order dispersion |
| CN110595596A (en) * | 2019-09-24 | 2019-12-20 | 重庆长安汽车股份有限公司 | Method for testing contribution amount of noise of air inlet and outlet to noise in vehicle |
| CN112508289A (en) * | 2020-12-14 | 2021-03-16 | 潍柴动力股份有限公司 | Method and system for calculating noise contribution of vehicle subsystem |
| CN112857834A (en) * | 2021-02-25 | 2021-05-28 | 浙江航驱汽车科技有限公司 | Method for evaluating running noise of double-pinion type electric power steering gear |
-
2021
- 2021-11-22 CN CN202111385691.8A patent/CN114323258A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102393246A (en) * | 2011-10-22 | 2012-03-28 | 重庆长安汽车股份有限公司 | Noise evaluation method for automobile generator under finished automobile state |
| CN102494754A (en) * | 2011-12-20 | 2012-06-13 | 重庆长安汽车股份有限公司 | Rapid identification method of noise source contributions in car based on order dispersion |
| CN110595596A (en) * | 2019-09-24 | 2019-12-20 | 重庆长安汽车股份有限公司 | Method for testing contribution amount of noise of air inlet and outlet to noise in vehicle |
| CN112508289A (en) * | 2020-12-14 | 2021-03-16 | 潍柴动力股份有限公司 | Method and system for calculating noise contribution of vehicle subsystem |
| CN112857834A (en) * | 2021-02-25 | 2021-05-28 | 浙江航驱汽车科技有限公司 | Method for evaluating running noise of double-pinion type electric power steering gear |
Non-Patent Citations (2)
| Title |
|---|
| 陈剑 等: "某SUV整车室内通过噪声部件贡献量分析与性能提升", 噪声与振动控制, vol. 39, no. 2, pages 118 - 121 * |
| 马静静 等: "整车车内NVH异响的识别及解决方案", 汽车工程师, no. 10, pages 36 - 39 * |
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