Complete vehicle noise reduction contribution rate analysis method and system and storage medium

Abstract

The invention discloses a complete vehicle noise reduction contribution rate analysis method and system and a storage medium. The method comprises the steps that a complete vehicle is divided into a plurality of different systems; performing contribution rate analysis by sequentially adjusting the failure forms of the corresponding connection groups to obtain the contribution rate of each system to the noise reduction amount of the whole vehicle; by cancelling or replacing the acoustic parts, the contribution of each acoustic part to the system noise reduction amount is simulated, and then the contribution rate of each acoustic part to the system noise reduction amount is calculated; and analyzing the contribution rate of each acoustic part to the noise reduction amount of the whole vehicle through mathematical operation. According to the whole vehicle noise reduction contribution rate analysis method and system and the storage medium provided by the invention, the parts can be changed before the arrangement position and the space are not locked, the manpower and development cost is reduced, the cost and the weight of the parts with low contribution rate can be reduced, and the acoustic performance of the whole vehicle can be improved by optimal design of the parts with high contribution rate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of noise analysis, in particular to a vehicle noise reduction contribution rate analysis method, a vehicle noise reduction contribution rate analysis system and a storage medium. BACKGROUND

[0002] At present, the contribution degree analysis of vehicle noise is mostly based on test data for analysis to solve the problem of noise.

[0003] Based on test data, the contribution amount analysis indicates that in the later stage of automobile research and development, it is necessary to update drawings, molds and the like when changing automobile parts, which requires a large amount of manpower and cost, and the arrangement position and space are locked in the early stage, and the changeable degree is limited. SUMMARY

[0004] The purpose of the present application is to provide a vehicle noise reduction contribution rate analysis method, system and storage medium, which can change parts before the arrangement position and space are locked, reduce manpower and development cost, and reduce the cost of parts with low contribution rate and optimize the design of parts with high contribution rate to improve the acoustic performance of the vehicle.

[0005] The present application provides the following scheme:

[0006] According to one aspect of the present application, a vehicle noise reduction contribution rate analysis method is provided, which comprises:

[0007] dividing the vehicle into a plurality of different systems;

[0008] contribution rate analysis is performed by sequentially adjusting the failure mode of the corresponding connection group to obtain the contribution rate of each system to the vehicle noise reduction amount;

[0009] The contribution amount of each acoustic part to the system noise attenuation amount is simulated by canceling or replacing the acoustic part, and then the contribution rate of each acoustic part to the system noise reduction amount is calculated;

[0010] According to the contribution rate of each system to the vehicle noise reduction amount and the contribution rate of each acoustic part to the system noise reduction amount, the contribution rate of each acoustic part to the vehicle noise reduction amount is analyzed by mathematical operation.

[0011] Optionally, the vehicle is divided into a plurality of systems, including a front wall system, a front door system, a rear door system, a side wall system, a front floor system, a rear floor system, a roof system and a rear wall system.

[0012] Optionally, the contribution rate of each system to the vehicle noise reduction amount is obtained by sequentially adjusting the failure mode of the corresponding connection group to perform contribution rate analysis, including:

[0013] Adjusting 8 large systems corresponding to the connection group failure state in turn, applying the window method, obtaining the contribution rate of 8 large systems to the noise reduction of the whole vehicle.

[0014] Optionally, adjusting 8 large systems corresponding to the connection group failure state in turn, applying the window method, obtaining the contribution rate of 8 large systems to the noise reduction of the whole vehicle, comprising:

[0015] Opening the measured system in 8 large systems, and failing other systems except the measured system, obtaining the contribution of the measured system to the noise reduction of the whole vehicle through simulation;

[0016] According to the contribution of the measured system to the noise of the whole vehicle, the contribution rate of the measured system to the noise reduction of the whole vehicle is calculated.

[0017] Optionally, adjusting 8 large systems corresponding to the connection group failure state in turn, applying the window method, obtaining the contribution rate of 8 large systems to the noise reduction of the whole vehicle, comprising:

[0018] Failing the measured system in 8 large systems, and opening other systems except the measured system, obtaining the contribution of other systems to the noise reduction of the whole vehicle through simulation;

[0019] According to the contribution of other systems to the noise of the whole vehicle, the contribution rate of the measured system to the noise reduction of the whole vehicle is calculated.

[0020] Optionally, by adjusting the failure form of the corresponding connection group in turn, the contribution rate analysis is carried out to obtain the contribution rate of each system to the noise reduction of the whole vehicle, comprising:

[0021] Applying the energy flow method, the contribution rate of 8 large systems to the noise reduction of the whole vehicle is obtained.

[0022] Optionally, by canceling or replacing acoustic components, the contribution of each acoustic component to the noise reduction of the system is simulated, and then the contribution rate of each acoustic component to the noise reduction of the system is calculated, comprising:

[0023] By canceling the measured acoustic component, the contribution of the measured acoustic component to the noise reduction of the system is simulated, and then the contribution rate of the measured acoustic component to the noise reduction of the system is calculated.

[0024] Optionally, by canceling or replacing acoustic components, the contribution of each acoustic component to the noise reduction of the system is simulated, and then the contribution rate of each acoustic component to the noise reduction of the system is calculated, comprising:

[0025] By replacing the measured acoustic component, the contribution of other acoustic components except the measured acoustic component to the noise reduction of the system is simulated, and then the contribution rate of the measured acoustic component to the noise reduction of the system is calculated.

[0026] According to two aspects of the present application, a whole vehicle noise reduction contribution rate analysis system is provided, comprising:

[0027] A division module is configured to divide the whole vehicle into a plurality of different systems;

[0028] A first contribution rate analysis module is configured to perform contribution rate analysis by sequentially adjusting failure modes of corresponding connection groups, and obtain the contribution rate of each system to the whole vehicle noise reduction;

[0029] A second contribution rate analysis module is configured to simulate the contribution of each acoustic component to the system noise reduction by canceling or replacing the acoustic component, and further calculate the contribution rate of each acoustic component to the system noise reduction;

[0030] A third contribution rate analysis module is configured to analyze the contribution rate of each acoustic component to the whole vehicle noise reduction by mathematical operation according to the contribution rate of each system to the whole vehicle noise reduction and the contribution rate of each acoustic component to the system noise reduction.

[0031] According to three aspects of the present application, a computer readable storage medium is provided, and a computer program is stored on the computer readable storage medium, and the computer program is executed by a processor to implement the whole vehicle noise reduction contribution rate analysis method as described above.

[0032] Through the above scheme, the following beneficial technical effects are obtained:

[0033] The whole vehicle noise reduction contribution rate analysis method is applied in the design stage of automobile research and development, and the component is changed before the arrangement position and space are locked, so that the manpower and development cost are reduced, and the components with low contribution rate can be reduced in cost and weight, and the components with high contribution rate can be optimized in design to improve the acoustic performance of the whole vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a three-level relationship architecture of a whole vehicle model provided by one or more embodiments of the present application;

[0035] Figure 2 is a flowchart of a whole vehicle noise reduction contribution rate analysis method provided by one or more embodiments of the present application;

[0036] Figure 3 is a perspective view of a front door system model provided by one or more embodiments of the present application;

[0037] Figure 4 is a perspective view of a rear door system model provided by one or more embodiments of the present application;

[0038] Figure 5is a perspective view of a side wall system model provided by one or more embodiments of the present application;

[0039] Figure 6 is a perspective view of a front floor system model provided by one or more embodiments of the present application;

[0040] Figure 7 is a perspective view of a rear floor system model provided by one or more embodiments of the present application;

[0041] Figure 8 is a perspective view of a roof system model provided by one or more embodiments of the present application;

[0042] Figure 9 is a perspective view of a rear wall system model provided by one or more embodiments of the present application;

[0043] Figure 10 is a simulation result diagram of a system-to-vehicle noise reduction contribution rate provided by one or more embodiments of the present application;

[0044] Figure 11 is a flowchart of a first contribution rate analysis operation provided by one or more embodiments of the present application;

[0045] Figure 12 is a flowchart of a first contribution rate analysis operation provided by one or more embodiments of the present application;

[0046] Figure 13 is a flowchart of a second contribution rate analysis operation provided by one or more embodiments of the present application;

[0047] Figure 14 is a flowchart of a second contribution rate analysis operation provided by one or more embodiments of the present application;

[0048] Figure 15 is a structural diagram of a vehicle noise reduction contribution rate analysis system provided by one or more embodiments of the present application. DETAILED DESCRIPTION

[0049] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0050] The application provides a vehicle noise reduction contribution rate analysis method based on path analysis. First, the vehicle model is divided into eight systems by using the VAone software, and each system has corresponding acoustic package components. The contribution rate of the eight systems to the vehicle noise reduction is analyzed by using the window method. Then, the noise reduction contribution rate of each system component to the system noise reduction is obtained through simulation analysis of the noise reduction of each system, so that the contribution rate of a certain component to the vehicle noise reduction is obtained.

[0051] Figure 1 A three-level architecture of a vehicle noise system is shown. Referring to Figure 1 The noise reduction of a whole household or commercial vehicle is divided into three different levels. First, the vehicle level. The noise reduction of a whole household or commercial vehicle is the noise reduction of the vehicle.

[0052] Below the vehicle level, eight different systems are divided. These systems include: the front wall system, the front door system, the rear door system, the side wall system, the front floor system, the rear floor system, the roof system and the rear wall system. Each of these systems corresponds to its own noise reduction.

[0053] At the next level, each system includes its own sound-absorbing and sound-insulating components. Taking the side wall system of the vehicle as an example, it contains acoustic components: side wall glass and side wall fender.

[0054] In this way, from the vehicle system to the various acoustic components contained in the vehicle, they are divided into three different levels from top to bottom. Then, the noise reduction contribution rate analysis will be carried out according to the hierarchical relationship between the components.

[0055] Figure 2 A flowchart of the vehicle noise reduction contribution rate analysis method provided by the embodiment of the application is shown. Referring to Figure 2 The vehicle noise reduction contribution rate analysis method includes the following operation steps:

[0056] S21, the vehicle is divided into a plurality of different systems.

[0057] S22, by adjusting the failure mode of the corresponding connection group in sequence, the window method is applied to perform contribution rate analysis, and the contribution rate of each system to the vehicle noise reduction is obtained.

[0058] S23, by canceling or replacing the acoustic components, the contribution of each acoustic component to the system noise attenuation is simulated, and then the contribution rate of each acoustic component to the system noise reduction is calculated.

[0059] S24, according to the contribution rate of each system to the noise reduction of the whole vehicle, and the contribution rate of each acoustic component to the noise reduction of the system, the contribution rate of each acoustic component to the noise reduction of the whole vehicle is analyzed by mathematical operation.

[0060] In the embodiment of the application, the VAone software is used to analyze the noise reduction contribution rate of the SEA model of the whole vehicle.

[0061] It should be understood that whether the SEA model of the whole vehicle is different systems that cooperate with each other to form a whole. As described above, such systems are a total of 8. They are: front wall system, front door system, rear door system, side wall system, front floor system, rear floor system, roof system and rear wall system.

[0062] Figures 3 to 9 The perspective view of the three-dimensional model of the aforementioned eight systems in the VAone software is shown respectively.

[0063] In addition, each different acoustic component is further included in the interior of each system.

[0064] In the technical solution claimed in the application, the contribution rate of each system to the noise reduction of the whole vehicle needs to be analyzed, and then the contribution rate of each different acoustic component in the system to the system to which it belongs is analyzed. Finally, the contribution rates of the two different levels are multiplied to obtain the contribution rate of a specific acoustic component to the noise reduction of the whole vehicle.

[0065] It should also be understood that in order for the models of each system to cooperate with each other to form the model of the whole vehicle, there must be some connections (junctions) between them. In the VAone software, these connections are the links between the subsystems. The connection between the subsystems is called a junction.

[0066] The connection between two subsystems may be one or more. In the case of multiple connections between two subsystems, the multiple connections between the subsystems are combined and referred to as a connection group.

[0067] The correlation between systems is set by establishing the connection relationship between points, lines and surfaces to describe the energy transfer form between different subsystems.

[0068] Before analyzing the contribution rate of different systems, the connection group used to describe the energy transfer form between the systems needs to be disabled. Disabling the connection group between different systems means that the connection between different systems is lost. They can be directly analyzed to obtain the contribution rate of each system to the noise reduction of the whole vehicle.

[0069] Specifically, by adjusting the failure mode of the connection group between each system, the window method is applied to analyze the contribution rate.

[0070] More specifically, if the contribution rate of the rear system is to be calculated, the other seven systems in the eight systems can be closed respectively, and only the rear system is opened. The noise attenuation amount in this state is calculated. Then, the noise attenuation amount when all eight systems are opened is calculated. The contribution rate of the rear system can be obtained by dividing the noise attenuation amount when the rear system is opened by the noise attenuation amount when all eight systems are opened.

[0071] The calculation method of the contribution rate of other systems is similar to the calculation method of the contribution rate of the rear system.

[0072] After the contribution rate of the individual system is calculated, the contribution rate of each acoustic component in the respective system can be further calculated.

[0073] The contribution rate calculation process of the acoustic component is also similar to the contribution rate calculation process of the system. The biggest difference between the two is the level of the problem. The problem level of the acoustic component contribution rate calculation problem is inside the system. The problem level of the system contribution rate calculation process is inside the whole vehicle.

[0074] In addition to the difference in problem level, the actual calculation process of the two is similar. That is, when calculating the noise attenuation contribution rate of the acoustic component, it is also necessary to set the failure state of each acoustic component in the system, so as to determine the attenuation contribution rate of one or several acoustic components in the system.

[0075] It should be noted that the noise attenuation is also referred to as noise reduction (Noise Reduction, NR).

[0076] More specifically, the eight systems of the whole vehicle are divided to establish a system-level noise attenuation model. By canceling or replacing the acoustic components, the contribution of each acoustic component to the system noise attenuation is simulated, and the contribution rate is calculated.

[0077] For example, as shown in Figure 4 , based on the front system metal and acoustic components, the inner and outer cavities are built, and the cavity size is set to 3.6m 3 and 0.9m 3 , respectively, according to the size of the current vehicle. A 1 Pa sound load is loaded on the outer cavity, and the sound pressure level of the inner cavity is analyzed. The difference between the inner and outer cavities is the noise attenuation of the system. By canceling the acoustic components of the front system, such as the front sound insulation pad and the front baffle pad, the contribution rate of the two acoustic components to the noise attenuation of the front system is analyzed.

[0078] Furthermore, the overall vehicle noise reduction and the noise reduction of each system i are given by the following formula:

[0079] NR = NR1 + ... + NR i

[0080] Where NR represents the overall noise reduction of the vehicle, NR i This represents the amount of noise reduction in system i.

[0081] Furthermore, the relationship between the sound absorption and insulation capacity of each system i and the contribution of each acoustic component j in each system is given by the following formula:

[0082] NR i =sr i1 +sr i2 +…+sr ij

[0083] Among them, NR i sr represents the amount of noise reduction in system i. ij This represents the amount of noise reduction of acoustic component j in system i.

[0084] Furthermore, the contribution rate of each system i to the overall vehicle noise reduction is given by the following formula:

[0085] τ i =NR i / NR

[0086] Where, τ i NR represents the contribution rate of system i to the overall vehicle noise reduction. i NR represents the noise reduction of system i, and NR represents the noise reduction of the entire vehicle.

[0087] Furthermore, the contribution rate of each acoustic component j to each system i is given by the following formula:

[0088] γ ij =sr ij / Nr i

[0089] Where, γ ij Indicates the contribution rate of each component to the noise reduction, sr ij NR represents the contribution of component j in system i to the noise reduction. i This represents the amount of noise reduction in system i.

[0090] Furthermore, the contribution rate of acoustic component j in each system i to the overall vehicle noise reduction is given by the following formula:

[0091] C ij =τ i ×γ ij

[0092] wherein, C ij represents the contribution rate of system i to the noise reduction amount of the whole vehicle, γ ij represents the contribution rate of each component noise reduction amount, τ i represents the contribution rate of system i to the noise reduction amount of the whole vehicle.

[0093] It should be noted that in the process of analyzing the contribution rate of each system, two methods can be used, the first is called the window method, and the second is called the energy flow method.

[0094] In the process of analyzing the window method, the contribution rate of a specific system to the noise reduction amount of the whole vehicle is obtained by opening or failing part of the system.

[0095] The energy flow method obtains the contribution rate of each specific system to the noise reduction amount of the whole vehicle by solving the energy flow on different transmission paths.

[0096] Figure 10 The noise attenuation contribution rate calculated according to the above method is shown. Referring to Figure 10 , the contribution rate of the 8 large systems to the sound transmission function of the cabin is obtained by adjusting the failure state of the JUNCTION group corresponding to the 8 large systems in turn.

[0097] The present application is abbreviated as the average value of the frequency band, for example, the contribution rate of the 8 systems is:

[0098] τ1=0.02

[0099] τ2=0.15

[0100] τ3=0.22

[0101] τ4=0.03

[0102] τ5=0.51

[0103] τ6=0.02

[0104] τ7=0.03

[0105] τ8=0.02

[0106] The contribution rate of a certain system to each component is obtained by simulating the noise reduction amount of the system by VAone software, and the contribution rate based on the frequency change can be obtained.

[0107] Figure 11 The flowchart of the first contribution rate analysis operation provided by the embodiment of the present application is shown. Referring to Figure 11 , the contribution rate of the 8 large systems to the noise reduction amount of the whole vehicle is obtained by adjusting the failure state of the connection group corresponding to the 8 large systems in turn and applying the window method, including the following operation steps:

[0108] S1101, open the measured system in the eight systems, and disable other systems except the measured system, and obtain the contribution of the measured system to the noise reduction of the whole vehicle through simulation.

[0109] S1102, calculate the contribution rate of the measured system to the noise reduction of the whole vehicle according to the contribution of the measured system to the noise reduction of the whole vehicle.

[0110] Figure 11 An implementation of the windowing method is shown. In the implementation shown in Figure 11 In the implementation shown in

[0111] The measured system should be one selected from the eight systems divided by the whole vehicle. That is, the measured system should be one of the following systems: the front wall system, the front door system, the rear door system, the side wall system, the front floor system, the rear floor system, the roof system and the rear wall system.

[0112] The contribution of the measured system to the noise reduction is obtained, and the contribution rate of the measured system to the noise reduction is obtained by dividing the contribution of the measured system to the noise reduction by the contribution of all systems of the whole vehicle to the noise reduction.

[0113] Figure 12 A flowchart of the first contribution rate analysis operation provided by the embodiment of the application is shown. Referring to Figure 12 , the failure states of the eight systems corresponding to the connection groups are adjusted in sequence, the windowing method is applied, the contribution rates of the eight systems to the noise reduction of the whole vehicle are obtained, and the following operation steps are included:

[0114] S1201, disable the measured system in the eight systems, and open other systems except the measured system, and obtain the contribution of the other systems to the noise reduction of the whole vehicle through simulation.

[0115] S1202, calculate the contribution rate of the measured system to the noise reduction of the whole vehicle according to the contribution of the other systems to the noise reduction of the whole vehicle.

[0116] The embodiment shown in Figure 12 The embodiment shown in the foregoing embodiment of the application is different from the foregoing embodiment of the application in that the failure target of the system is different.

[0117] In the foregoing embodiments of the present application, the disabled system is other system than the measured system. In the present embodiment, the disabled system is the measured system itself, and other systems than the measured system are in the open state.

[0118] Since only the measured system is in the disabled state, the contribution of the noise reduction directly calculated is a value not containing the contribution of the measured system. Comparing this value with the contribution of the noise reduction when all systems are in the open state is the contribution rate of the noise reduction of all systems other than the measured system. Subtracting this contribution rate by 1 is the contribution rate of the measured system.

[0119] Figure 13 A flow chart of the second contribution rate analysis operation provided by the embodiments of the present application is shown. Referring to Figure 13 , the contribution of each acoustic component to the noise reduction of the system is simulated by canceling or replacing the acoustic component, and the contribution rate of each acoustic component to the noise reduction of the system is calculated, including the following operation steps:

[0120] S1301, the contribution of the measured acoustic component to the noise reduction of the system is simulated by canceling the measured acoustic component, and the contribution rate of the measured acoustic component to the noise reduction of the system is calculated.

[0121] It should be understood that each system contains a plurality of different acoustic components. For example, typically, the front door system includes three components, namely the front door panel, the front door glass and the front door guard. These three components all contribute to the noise reduction of the front door system. In the present embodiment, the contribution rate of the acoustic component to the noise reduction of the system to which it belongs is calculated by canceling the measured acoustic component.

[0122] It should be understood that when an acoustic component is canceled in a system, the contribution of the acoustic component to the noise reduction should also be canceled. Based on this understanding, the change in the contribution rate of an acoustic component before and after cancellation can be compared to obtain the contribution rate of the canceled acoustic component to the noise reduction of the entire system.

[0123] Figure 14 A flow chart of the second contribution rate analysis operation provided by the embodiments of the present application is shown. Referring to Figure 14 , the contribution of each acoustic component to the noise reduction of the system is simulated by canceling or replacing the acoustic component, and the contribution rate of each acoustic component to the noise reduction of the system is calculated, including the following operation steps:

[0124] S1401, by replacing the measured acoustic component, simulating the contribution of other acoustic components to the system noise reduction, and then calculating the contribution rate of the measured acoustic component to the system noise reduction.

[0125] In addition to the cancellation mode, the measured acoustic component can also be replaced. Note that in the replacement operation, the replaced acoustic component is the measured target. The acoustic component used to replace the measured target should be an acoustic component whose noise reduction contribution is known.

[0126] Since the contribution of the replaced acoustic component is known, the contribution of other acoustic components except the measured target can be easily obtained through the simulation process. After obtaining the contribution of other acoustic components, the contribution of the measured acoustic component can be obtained, and then the contribution rate can be obtained.

[0127] Figure 15 The structure diagram of the whole vehicle noise reduction contribution rate analysis system provided by the embodiment of the application is shown. Referring to Figure 15 , the whole vehicle noise reduction contribution rate analysis system includes: a first contribution rate analysis module 1502, a second contribution rate analysis module 1503, and a third contribution rate analysis module 1504.

[0128] The division module 1501 is used to divide the whole vehicle into multiple different systems.

[0129] The first contribution rate analysis module 1502 is used to adjust the failure mode of the corresponding connection group in sequence, apply the windowing method, and perform contribution rate analysis to obtain the contribution rate of each system to the whole vehicle noise reduction.

[0130] The second contribution rate analysis module 1503 is used to simulate the contribution of each acoustic component to the system noise reduction by canceling or replacing the acoustic component, and then calculate the contribution rate of each acoustic component to the system noise reduction.

[0131] The third contribution rate analysis module 1504 is used to analyze the contribution rate of each acoustic component to the whole vehicle noise reduction by mathematical operation according to the contribution rate of each system to the whole vehicle noise reduction and the contribution rate of each acoustic component to the system noise reduction.

[0132] Optionally, the whole vehicle is divided into a front wall system, a front door system, a rear door system, a side wall system, a front floor system, a rear floor system, a roof system, and a rear wall system.

[0133] Optionally, the first contribution rate analysis module 1502 is specifically used for:

[0134] The failure states of the connection groups corresponding to the eight systems are adjusted in sequence, and the windowing method is applied to obtain the contribution rates of the eight systems to the noise reduction of the vehicle.

[0135] Optionally, the failure states of the connection groups corresponding to the eight systems are adjusted in sequence, and the windowing method is applied to obtain the contribution rates of the eight systems to the noise reduction of the vehicle, including:

[0136] The measured system in the eight systems is opened, and the systems other than the measured system are failed, and the contribution of the measured system to the noise reduction of the vehicle is obtained through simulation;

[0137] According to the contribution of the measured system to the noise reduction of the vehicle, the contribution rate of the measured system to the noise reduction of the vehicle is calculated.

[0138] Optionally, the failure states of the connection groups corresponding to the eight systems are adjusted in sequence, and the windowing method is applied to obtain the contribution rates of the eight systems to the noise reduction of the vehicle, including:

[0139] The measured system in the eight systems is failed, and the systems other than the measured system are opened, and the contribution of the other systems to the noise reduction of the vehicle is obtained through simulation;

[0140] According to the contribution of the other systems to the noise reduction of the vehicle, the contribution rate of the measured system to the noise reduction of the vehicle is calculated.

[0141] Optionally, the first contribution rate analysis module 1502 is specifically configured to:

[0142] The energy flow method is applied to obtain the contribution rates of the eight systems to the noise reduction of the vehicle.

[0143] Optionally, the second contribution rate analysis module 1503 is specifically configured to:

[0144] By canceling the measured acoustic component, the contribution of the measured acoustic component to the system noise reduction is simulated, and the contribution rate of the measured acoustic component to the system noise reduction is calculated.

[0145] Optionally, the second contribution rate analysis module 1504 is specifically configured to:

[0146] By replacing the measured acoustic component, the contribution of the other acoustic components other than the measured acoustic component to the system noise reduction is simulated, and the contribution rate of the measured acoustic component to the system noise reduction is calculated.

[0147] It is worth noting that, although only some basic function modules are disclosed in the embodiments of the present application, it does not mean that the composition of the system is limited to the above basic function modules. On the contrary, the meaning expressed by the embodiments is that on the basis of the above basic function modules, one or more function modules can be added by those skilled in the art in combination with the prior art to form infinite embodiments or technical solutions. That is, the system is open rather than closed, and the protection scope of the present application claims cannot be limited to the disclosed basic function modules. At the same time, in order to facilitate description, the above device is described as various units and modules. Of course, the functions of the units and modules can be realized in the same software and / or hardware in the implementation of the present application.

[0148] The present application also provides a computer readable storage medium storing a computer program executable by a vehicle, which, when running on the vehicle, causes the vehicle to perform the steps of the vehicle monitoring method.

[0149] Specifically, the computer storage medium of the embodiments of the present application can adopt any combination of one or more computer readable media. The computer readable medium can be a computer readable signal medium or a computer readable storage medium. The computer readable storage medium may, for example, be but is not limited to an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or apparatus, or any combination of the above. More specific examples (non-exhaustive list) of the computer readable storage medium include: electrical connections having one or more wires, portable computer disks, hard drives, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROMs), optical storage devices, magnetic storage devices, or any suitable combination of the above. In the embodiments, the computer readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, device or apparatus.

[0150] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0151] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for analyzing the contribution rate of vehicle noise reduction, characterized in that, The method for analyzing the contribution rate of vehicle noise reduction includes: The vehicle is divided into several different systems; By sequentially adjusting the failure modes of the corresponding connection groups and conducting contribution rate analysis, the contribution rate of each system to the reduction of vehicle noise can be obtained. By removing or replacing acoustic components, the contribution of each acoustic component to the reduction of system noise is simulated, and then the contribution rate of each acoustic component to the reduction of system noise is calculated. Based on the contribution rate of each system to the overall vehicle noise reduction, and the contribution rate of each acoustic component to the overall system noise reduction, the contribution rate of each acoustic component to the overall vehicle noise reduction is analyzed through mathematical calculations.

2. The method according to claim 1, characterized in that, The various systems that divide the vehicle include: front bulkhead system, front door system, rear door system, side bulkhead system, front floor system, rear floor system, roof system, and rear bulkhead system.

3. The method according to claim 2, characterized in that, By sequentially adjusting the failure modes of the corresponding connection groups and performing contribution rate analysis, the contribution rate of each system to the overall vehicle noise reduction was obtained, including: By sequentially adjusting the failure status of the corresponding connection groups of the eight major systems and applying the windowing method, the contribution rate of the eight major systems to the reduction of vehicle noise was obtained.

4. The method according to claim 3, characterized in that, By sequentially adjusting the failure states of the corresponding connection groups of the eight major systems and applying the window method, the contribution rate of the eight major systems to the overall vehicle noise reduction was obtained, including: The system under test is turned on out of the eight major systems, and all other systems except the system under test are turned off. The contribution of the system under test to the reduction of vehicle noise is obtained through simulation. The contribution rate of the tested system to the overall vehicle noise reduction is calculated based on the contribution of the tested system to the overall vehicle noise reduction.

5. The method according to claim 3, characterized in that, By sequentially adjusting the failure states of the corresponding connection groups of the eight major systems and applying the window method, the contribution rate of the eight major systems to the overall vehicle noise reduction was obtained, including: By disabling the tested system among the eight major systems and turning on the other systems, the contribution of the other systems to the reduction of vehicle noise can be obtained through simulation. Calculate the contribution rate of the tested system to the overall vehicle noise reduction based on the contributions of other systems to the overall vehicle noise reduction.

6. The method according to claim 2, characterized in that, By sequentially adjusting the failure modes of the corresponding connection groups and performing contribution rate analysis, the contribution rate of each system to the overall vehicle noise reduction was obtained, including: By applying the energy flow method, the contribution rates of eight major systems to the reduction of vehicle noise were obtained.

7. The method according to claim 1, characterized in that, By removing or replacing acoustic components, the contribution of each acoustic component to the system noise reduction is simulated, and the contribution rate of each acoustic component to the system noise reduction is calculated, including: By eliminating the acoustic component under test, the contribution of the acoustic component under test to the reduction of system noise is simulated, and then the contribution rate of the acoustic component under test to the reduction of system noise is calculated.

8. The method according to claim 1, characterized in that, By removing or replacing acoustic components, the contribution of each acoustic component to the system noise reduction is simulated, and the contribution rate of each acoustic component to the system noise reduction is calculated, including: By replacing the acoustic component under test, the contribution of other acoustic components besides the tested component to the reduction of system noise is simulated, and then the contribution rate of the tested acoustic component to the reduction of system noise is calculated.

9. A system for analyzing the contribution rate of vehicle noise reduction, characterized in that, The vehicle noise reduction contribution rate analysis system includes: The partitioning module is used to divide the entire vehicle into multiple different systems; The first contribution rate analysis module is used to perform contribution rate analysis by sequentially adjusting the failure modes of the corresponding connection groups, and to obtain the contribution rate of each system to the reduction of vehicle noise. The second contribution rate analysis module is used to simulate the contribution of each acoustic component to the reduction of system noise by canceling or replacing acoustic components, and then calculate the contribution rate of each acoustic component to the reduction of system noise. The third contribution rate analysis module is used to analyze the contribution rate of each acoustic component to the overall vehicle noise reduction based on the contribution rate of each system to the overall vehicle noise reduction, as well as the contribution rate of each acoustic component to the overall system noise reduction, through mathematical calculations.

10. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, which, when executed by a processor, implements the method for analyzing the contribution rate of vehicle noise reduction as described in any one of claims 1 to 8.

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