Vehicle noise adjustment methods, devices, equipment and storage media

Abstract

This invention discloses a method, apparatus, device, and storage medium for adjusting vehicle abnormal noises, belonging to the field of noise control technology. The invention acquires the synthesized vibration signal and vibration frequency of components in a vehicle; acquires the waveform characteristics and peak-valley values ​​of the synthesized vibration signal; when the waveform characteristics meet preset waveform characteristics, the peak-valley values ​​are greater than or equal to preset peak-valley thresholds, and the component vibration frequency is greater than or equal to a preset vibration frequency threshold, it determines that an abnormal noise exists in the vehicle; based on the peak-valley values ​​and the component vibration frequency, it adjusts the vehicle's abnormal noises. This allows for quick and accurate identification of abnormal noises based on the acquired data, and by adjusting the peak-valley values ​​and component vibration frequency, it resolves vehicle abnormal noises and discomfort, improves the effectiveness of vehicle abnormal noise adjustment, and ultimately enhances the vehicle's performance.

Description

Technical Field

[0001] This invention relates to the field of noise control technology, and in particular to a method, apparatus, device, and storage medium for adjusting abnormal noises in vehicles. Background Technology

[0002] With the popularization of new energy vehicles, people's anxiety about fuel consumption has been alleviated, and the use of air conditioning for cooling has become widespread, increasing the number of user scenarios for new energy vehicles. For example, a certain PHEV (Plug-in hybrid electric vehicle) model may exhibit regular, rhythmic abnormal noises or other NVH (noise, vibration, and harshness) issues in the cooling system when the air conditioning is on for extended periods of rest, severely impacting passenger comfort. Current automotive NVH verification methods control the noise and vibration of the compressor, blower, and radiator body to extremely stringent levels, undergoing long-term, repeated verification during the development phase. Furthermore, as performance degrades and components age, NVH issues in the thermal management system will resurface. Summary of the Invention

[0003] The main objective of this invention is to provide a method, apparatus, device, and storage medium for adjusting vehicle abnormal noises, aiming to solve the technical problem of poor vehicle abnormal noise adjustment effect in the prior art.

[0004] To achieve the above objectives, the present invention provides a method for adjusting abnormal noises in a vehicle, the method comprising the following steps:

[0005] Acquire the composite vibration signal and vibration frequency of components in the vehicle;

[0006] Obtain the waveform characteristics and peak-to-valley values ​​of the vibration synthesis signal;

[0007] When the waveform characteristics meet the preset waveform characteristics, the peak-to-valley value is greater than or equal to the preset peak-to-valley threshold, and the component vibration frequency is greater than or equal to the preset vibration frequency threshold, it is determined that there is an abnormal noise in the vehicle;

[0008] Vehicle noise adjustment is performed based on the peak and valley values ​​and the vibration frequency of the component.

[0009] Optionally, the synthesized vibration signal of components in the vehicle is acquired, including:

[0010] The first amplitude of the engine speed, the second amplitude of the electric fan speed, and the third amplitude of the compressor speed in the vehicle are obtained.

[0011] The first vibration signal, the second vibration signal, and the third vibration signal are obtained through the first amplitude, the second amplitude, and the third amplitude, respectively.

[0012] By combining at least two of the first vibration signal, the second vibration signal, and the third vibration signal, a composite vibration signal of a component in the vehicle is obtained.

[0013] Optionally, the vibration frequency of components in the vehicle is obtained, including:

[0014] Obtain the vehicle's current engine speed, current electric fan speed, and current compressor speed;

[0015] The current engine vibration frequency corresponding to the current engine speed is obtained based on the first mapping relationship between engine speed and engine vibration frequency.

[0016] The current electronic fan vibration frequency corresponding to the current electronic fan speed is obtained based on the second mapping relationship between the electronic fan speed and the electronic fan vibration frequency.

[0017] The current compressor vibration frequency corresponding to the current compressor speed is obtained based on the third mapping relationship between compressor speed and compressor vibration frequency.

[0018] The vibration frequencies of components in the vehicle are obtained by using the current engine vibration frequency, the current electric fan vibration frequency, and the current compressor vibration frequency.

[0019] Optionally, before obtaining the current engine vibration frequency corresponding to the current engine speed based on the first mapping relationship between engine speed and engine vibration frequency, the method further includes:

[0020] Engine vibration frequency samples were collected at different engine speeds;

[0021] Collect fan speed data under different fan duty cycles, and collect fan vibration frequency samples under different fan speed data;

[0022] Samples of compressor vibration frequencies were collected at different compressor speeds.

[0023] A first mapping relationship between engine speed and engine vibration frequency is established by using different engine speeds and engine vibration frequency samples.

[0024] A second mapping relationship between the electric fan speed and the electric fan vibration frequency is established by using different electric fan speeds and samples of the electric fan vibration frequency.

[0025] A third mapping relationship between compressor speed and compressor vibration frequency is established by using samples of different compressor speeds and compressor vibration frequencies.

[0026] Optionally, the adjustment of vehicle abnormal noise based on the peak-valley value and the vibration frequency of the component includes:

[0027] Based on the peak and valley values, the amplitude values ​​of at least two vibration signals in the vibration synthesis signal are obtained;

[0028] The amplitude ratio is obtained by using the amplitude values ​​of at least two vibration signals;

[0029] The vibration frequencies of at least two components are obtained through the vibration frequencies of the aforementioned components;

[0030] The frequency ratio is obtained by measuring the vibration frequencies of at least two components;

[0031] The amplitude ratio is adjusted to be outside the preset amplitude vibration range, and the frequency ratio is adjusted to be outside the preset frequency vibration range, thereby completing the adjustment of abnormal noise in the vehicle.

[0032] Optionally, adjusting the amplitude ratio to outside a preset amplitude beat range and adjusting the frequency ratio to outside a preset frequency beat range to complete the vehicle's abnormal noise adjustment includes:

[0033] The rotational speed of the component to be adjusted is determined based on a preset vehicle performance table.

[0034] The rotational speed of the component to be adjusted is adjusted to obtain the rotational speed of the target component;

[0035] When the amplitude ratio corresponding to the rotational speed of the target component is outside the preset amplitude beat interval and the frequency ratio corresponding to the rotational speed of the target component is outside the preset frequency beat interval, the abnormal noise adjustment of the vehicle is completed.

[0036] Optionally, determining the rotational speed of the component to be adjusted based on a preset vehicle performance table includes:

[0037] The engine speed fluctuation, electric fan speed fluctuation, and compressor speed fluctuation are determined based on the preset vehicle performance table.

[0038] The target speed fluctuation is obtained by selecting the speed fluctuation that satisfies the preset fluctuation change from the engine speed fluctuation, the electric fan speed fluctuation, and the compressor speed fluctuation;

[0039] The component speed corresponding to the target speed fluctuation is taken as the component speed to be adjusted.

[0040] Furthermore, to achieve the above objectives, the present invention also proposes a vehicle noise adjustment device, the vehicle noise adjustment device comprising:

[0041] The acquisition module is used to acquire the synthesized vibration signals and vibration frequencies of components in the vehicle.

[0042] The acquisition module is also used to acquire the waveform characteristics and peak-valley values ​​of the vibration synthesis signal;

[0043] The determination module is used to determine that there is an abnormal noise in the vehicle when the waveform characteristics meet the preset waveform characteristics, the peak-valley value is greater than or equal to the preset peak-valley threshold, and the component vibration frequency is greater than or equal to the preset vibration frequency threshold.

[0044] An adjustment module is used to adjust vehicle noise based on the peak and valley values ​​and the vibration frequency of the component.

[0045] Furthermore, to achieve the above objectives, the present invention also proposes a vehicle noise adjustment device, which includes: a memory, a processor, and a vehicle noise adjustment program stored in the memory and executable on the processor. The vehicle noise adjustment program is configured to implement the steps of the vehicle noise adjustment method described above.

[0046] In addition, to achieve the above objectives, the present invention also proposes a storage medium storing a vehicle noise adjustment program, wherein when the vehicle noise adjustment program is executed by a processor, the steps of the vehicle noise adjustment method described above are implemented.

[0047] This invention acquires the vibration synthesis signal and vibration frequency of components in a vehicle; acquires the waveform characteristics and peak-valley values ​​of the vibration synthesis signal; determines that there is abnormal noise in the vehicle when the waveform characteristics meet preset waveform characteristics, the peak-valley values ​​are greater than or equal to preset peak-valley thresholds, and the component vibration frequency is greater than or equal to preset vibration frequency thresholds; and adjusts the vehicle noise based on the peak-valley values ​​and the component vibration frequency. This allows for quick and accurate identification of abnormal noise in the vehicle based on the acquired data, and the adjustment of abnormal noise through peak-valley values ​​and component vibration frequency resolves vehicle noise and discomfort, improves the effectiveness of vehicle noise adjustment, and ultimately enhances the vehicle's performance. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the structure of the vehicle noise adjustment device in the hardware operating environment involved in the embodiment of the present invention;

[0049] Figure 2 This is a flowchart illustrating the first embodiment of the vehicle noise adjustment method of the present invention;

[0050] Figure 3 This is a schematic diagram of the waveform characteristics of the vibration synthesis signal in an embodiment of the vehicle abnormal noise adjustment method of the present invention;

[0051] Figure 4 This is a flowchart illustrating the second embodiment of the vehicle noise adjustment method of the present invention;

[0052] Figure 5 This is a flowchart illustrating the third embodiment of the vehicle noise adjustment method of the present invention;

[0053] Figure 6 This is a schematic diagram of a preset vehicle performance table according to an embodiment of the vehicle abnormal noise adjustment method of the present invention;

[0054] Figure 7 This is a schematic diagram of the overall process of an embodiment of the vehicle abnormal noise adjustment method of the present invention;

[0055] Figure 8 This is a structural block diagram of the first embodiment of the vehicle noise adjustment device of the present invention.

[0056] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0057] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0058] Reference Figure 1 , Figure 1 This is a schematic diagram of the vehicle noise adjustment device structure in the hardware operating environment involved in the embodiments of the present invention.

[0059] like Figure 1 As shown, the vehicle noise adjustment device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen or an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be high-speed random access memory (RAM) or stable non-volatile memory (NVM), such as a disk storage device. The memory 1005 may also optionally be a storage device independent of the aforementioned processor 1001.

[0060] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on the vehicle noise adjustment device, and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0061] like Figure 1As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a vehicle noise adjustment program.

[0062] exist Figure 1 In the vehicle noise adjustment device shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the vehicle noise adjustment device of the present invention can be set in the vehicle noise adjustment device, and the vehicle noise adjustment device calls the vehicle noise adjustment program stored in the memory 1005 through the processor 1001 and executes the vehicle noise adjustment method provided in the embodiment of the present invention.

[0063] This invention provides a method for adjusting abnormal noises in vehicles, referring to... Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of the vehicle noise adjustment method of the present invention.

[0064] In this embodiment, the vehicle abnormal noise adjustment method includes the following steps:

[0065] Step S10: Obtain the composite vibration signal and vibration frequency of the components in the vehicle.

[0066] It should be noted that the executing entity in this embodiment can be a vehicle noise adjustment device, or other devices that can achieve the same or similar functions. This embodiment does not limit this; this embodiment uses a vehicle noise adjustment device as an example for explanation.

[0067] In practice, the vehicle is a PHEV model. For example, when the air conditioner is turned on during normal driving, the vehicle will exhibit a strong periodic vibration. This phenomenon will occur in various conditions such as stationary driving, low-speed driving, and reversing. The conditions are not specific, and the duration and mileage of the problematic vehicles are inconsistent. However, the problematic condition is strong and can be perceived by users, affecting the user experience.

[0068] In specific implementations, the components in the vehicle may include the engine, electric fan, compressor, and other components, and this embodiment does not limit this.

[0069] The vibration synthesis signal of the component can be a signal synthesized from at least two of the vibration signals of engine speed, electric fan speed, and compressor speed. For example, the vibration synthesis signal can be a signal synthesized from the vibration signals of electric fan speed and compressor speed.

[0070] It is understandable that the vibration frequency of the component can be one or more of the engine vibration frequency, electric fan vibration frequency, and compressor vibration frequency.

[0071] Step S20: Obtain the waveform characteristics and peak-valley values ​​of the vibration synthesis signal.

[0072] It should be noted that the vibration synthesis signal is the vibration synthesis waveform. The waveform characteristics and corresponding waveform amplitude, phase and other characteristics can be obtained from the vibration synthesis waveform, thereby determining the peak and valley values ​​of the vibration synthesis signal.

[0073] It should be understood that the peak-to-valley value of a synthesized vibration signal refers to the difference between the maximum and minimum values ​​in the vibration waveform. The peak-to-valley value can be used to describe the amplitude range of the synthesized vibration signal. For example, if the peak value of the synthesized vibration signal is 10V and the valley value is -5V, then its peak-to-valley value is 15V.

[0074] Step S30: When the waveform characteristics meet the preset waveform characteristics, the peak-valley value is greater than or equal to the preset peak-valley threshold, and the component vibration frequency is greater than or equal to the preset vibration frequency threshold, it is determined that there is an abnormal noise in the vehicle.

[0075] In practical implementation, the preset waveform characteristics are the waveform characteristics that produce abnormal noises, such as... Figure 3 As shown, Figure 3 The diagram shows the waveform characteristics of the vibration synthesis signal. After combining vibration signals A1 and A2, the vibration synthesis signal A1+A2 is obtained. At this time, the waveform characteristics of the vibration synthesis signal meet the preset waveform characteristics.

[0076] It should be noted that the preset peak and valley thresholds can be set according to requirements, such as 0.09, 0.1, etc. This embodiment does not impose such limitations; the preset vibration frequency threshold can be set according to the development goals, for example, 0.8 m / s². 2 1m / s 2 However, this embodiment does not impose any limitations on this.

[0077] Understandably, by comparing the waveform characteristics with preset waveform characteristics, peak-valley values ​​with preset peak-valley thresholds, and component vibration frequencies with preset vibration frequency thresholds, the waveform characteristics are considered to conform to the preset waveform characteristics when they are consistent with the preset waveform characteristics. When the waveform characteristics conform to the preset waveform characteristics and the peak-valley values ​​are greater than or equal to the preset peak-valley thresholds, and the component vibration frequency is greater than or equal to the preset vibration frequency threshold, it is determined that there is an abnormal noise in the vehicle.

[0078] It should be noted that if the waveform characteristics do not conform to the preset waveform characteristics, or the peak-to-valley value is less than the preset peak-to-valley threshold, or the component vibration frequency is less than the preset vibration frequency threshold, it is determined that there is no abnormal noise in the vehicle, and the relevant parameters of the vehicle components can continue to be monitored.

[0079] In practical implementation, for example, if the vibration frequency range of an electronic fan is 5-200Hz, the effective RMS value and single-frequency peak value of the vibration within this range can be obtained. A threshold for the effective RMS value can also be set, such as 1 m / s². When the RMS value is greater than or equal to 1 m / s², a diagnostic alarm is triggered to confirm the presence of abnormal noise. Alternatively, when the single-frequency peak value is greater than or equal to the set peak value threshold of 0.8 m / s², a diagnostic alarm is output to confirm the presence of abnormal noise.

[0080] Step S40: Adjust vehicle abnormal noise based on the peak and valley values ​​and the vibration frequency of the component.

[0081] In practice, abnormal vehicle noises can be adjusted by adjusting peak and valley values ​​and component vibration frequencies. For example, adjusting peak and valley values ​​or reducing component vibration frequencies can prevent users from noticing abnormal vehicle noises or eliminate the noise altogether.

[0082] This embodiment acquires the vibration synthesis signal and vibration frequency of components in the vehicle; acquires the waveform characteristics and peak-valley values ​​of the vibration synthesis signal; when the waveform characteristics meet preset waveform characteristics, the peak-valley values ​​are greater than or equal to preset peak-valley thresholds, and the component vibration frequency is greater than or equal to preset vibration frequency thresholds, it determines that there is an abnormal noise in the vehicle; based on the peak-valley values ​​and the component vibration frequency, the abnormal noise of the vehicle is adjusted. This allows for quick and accurate identification of abnormal noise in the vehicle based on the acquired data, and by adjusting the abnormal noise of the vehicle through the peak-valley values ​​and component vibration frequency, the abnormal noise and discomfort of the vehicle can be resolved, improving the effect of vehicle abnormal noise adjustment and thus improving the vehicle's performance.

[0083] refer to Figure 4 , Figure 4 This is a flowchart illustrating the second embodiment of the vehicle noise adjustment method of the present invention.

[0084] Based on the first embodiment described above, step S10 of the vehicle abnormal noise adjustment method in this embodiment includes:

[0085] Step 101: Obtain the first amplitude of the engine speed, the second amplitude of the electric fan speed, and the third amplitude of the compressor speed in the vehicle.

[0086] In practice, the first amplitude is the amplitude corresponding to the engine speed, the second amplitude is the amplitude corresponding to the electric fan speed, and the third amplitude is the amplitude corresponding to the compressor speed.

[0087] The first, second, and third amplitudes can be detected by installing vibration sensors at the corresponding component locations on the vehicle.

[0088] Step 102: Obtain the first vibration signal, the second vibration signal, and the third vibration signal through the first amplitude, the second amplitude, and the third amplitude, respectively.

[0089] It should be noted that the first vibration signal is the vibration signal of the engine speed, the second vibration signal is the vibration signal of the electric fan speed, and the third vibration signal is the vibration signal of the compressor speed.

[0090] It should be noted that the first vibration signal, the second vibration signal, and the third vibration signal are simple harmonic signals.

[0091] In practice, the first vibration signal can be calculated using the first amplitude, the second vibration signal can be calculated using the second amplitude, and the third vibration signal can be calculated using the third amplitude.

[0092] As one implementation method, the rotational angular velocity and initial phase angle of the engine speed, the rotational angular velocity and initial phase angle of the electric fan speed, and the rotational angular velocity and initial phase angle of the compressor speed can also be obtained. Then, the first vibration signal, the second vibration signal, and the third vibration signal can be calculated using the rotational angular velocity, the initial phase angle, and the amplitude of the vibration signal. The steps for calculating the vibration signal are as follows: Equation 1:

[0093] X = Asin(ωt + θ) (Equation 1)

[0094] In Equation 1, X is the vibration signal, A is the amplitude, ω is the rotational angular velocity, t is the time, and θ is the initial phase angle. The first vibration signal, the second vibration signal, and the third vibration signal can be calculated using Equation 1.

[0095] Step 103: Combine at least two of the first vibration signal, the second vibration signal, and the third vibration signal to obtain the composite vibration signal of the components in the vehicle.

[0096] In specific implementation, at least two of the first vibration signal, the second vibration signal, and the third vibration signal can be synthesized to obtain the vibration synthesis signal of the components in the vehicle. For example, the first vibration signal and the second vibration signal can be synthesized, or the first vibration signal, the second vibration signal, and the third vibration signal can be synthesized.

[0097] As one implementation method, for example, the first vibration signal and the second vibration signal are synthesized to obtain a composite vibration signal. The calculation process for obtaining the composite vibration signal is as follows: Equation 2:

[0098] X 合 =X1+X2=A1sin(ω1t+θ1)+A2sin(ω2t+θ2) (Formula 2)

[0099] In equation 2 above, X 合The vibration synthesis signal is defined as follows: X1 is the first vibration signal, X2 is the second vibration signal, A1 is the first amplitude, ω1 is the first rotational angular velocity, t is time, θ1 is the first initial phase angle, A2 is the second amplitude, ω2 is the second rotational angular velocity, t is time, and θ2 is the second initial phase angle.

[0100] Step 104: Obtain the vehicle's current engine speed, current electric fan speed, and current compressor speed.

[0101] It should be noted that the current engine speed of a vehicle can be obtained by measuring the speed of the vehicle's crankshaft, which is usually measured by a signal disc mounted on the crankshaft.

[0102] In practical implementation, the current electric fan speed of the vehicle can be obtained by measuring the current electric fan duty cycle and determining the relationship between the duty cycle and the speed. The current electric fan speed can be obtained through the current electric fan duty cycle. The current compressor speed can be obtained by measurement, for example, through non-contact speed measurement methods, such as photoelectric measurement or magnetic measurement methods, or through contact speed measurement methods or speed statistics methods. This embodiment does not limit the specific methods used.

[0103] Step 105: Obtain the current engine vibration frequency corresponding to the current engine speed based on the first mapping relationship between engine speed and engine vibration frequency.

[0104] It should be noted that there is a primary mapping relationship between engine speed and engine vibration frequency, so the current engine vibration frequency can be obtained from the current engine speed.

[0105] Step 106: Obtain the current electronic fan vibration frequency corresponding to the current electronic fan speed according to the second mapping relationship between the electronic fan speed and the electronic fan vibration frequency.

[0106] It should be understood that there is a second mapping relationship between the fan speed and the fan vibration frequency, so the current fan vibration frequency can be obtained from the current fan speed.

[0107] As shown in Table 1 below, Table 1 is the second mapping relationship between the speed of the electric fan and the vibration frequency of the electric fan.

[0108] Table 1

[0109] Electric fan speed (rpm) Electric fan duty cycle (%) Vibration frequency of an electric fan (Hz) 1820 64 30.3 1880 66 31.3

[0110] It should be noted that, for example, if the duty cycle of the electric fan is 64%, the speed of the electric fan is 1820 rpm. According to Table 1, the vibration frequency of the electric fan corresponding to a speed of 1820 rpm is 30.3 Hz.

[0111] Step 107: Obtain the current compressor vibration frequency corresponding to the current compressor speed based on the third mapping relationship between compressor speed and compressor vibration frequency.

[0112] It should be noted that there is a third mapping relationship between compressor speed and compressor vibration frequency. Therefore, the current compressor vibration frequency can be obtained from the current compressor speed, and the corresponding compressor vibration frequency can be determined by reading the compressor speed.

[0113] As shown in Table 2 below, Table 2 is the third mapping relationship between compressor speed and compressor vibration frequency.

[0114] Table 2

[0115] Compressor speed / rpm Compressor vibration frequency / Hz 4000 66.7 6000 100

[0116] In practical implementation, for example, if the current compressor speed is 4000 rpm, then by referring to Table 2, the corresponding compressor vibration frequency is found to be 66.7 Hz.

[0117] Step 108: Obtain the vibration frequency of the components in the vehicle by means of the current engine vibration frequency, the current electric fan vibration frequency, and the current compressor vibration frequency.

[0118] In practice, the vibration frequency of components in the vehicle can be one or more of the current engine vibration frequency, the current electric fan vibration frequency, and the current compressor vibration frequency.

[0119] Optionally, before obtaining the current engine vibration frequency, the current electric fan vibration frequency, and the current compressor vibration frequency, it is necessary to establish a first mapping relationship between engine speed and engine vibration frequency, a second mapping relationship between electric fan speed and electric fan vibration frequency, and a third mapping relationship between compressor speed and compressor vibration frequency. Therefore, before step S105, the following steps are also included:

[0120] Engine vibration frequency samples were collected at different engine speeds; electric fan speed data were collected at different electric fan duty cycles, and electric fan vibration frequency samples were collected at different electric fan speeds; compressor vibration frequency samples were collected at different compressor speeds; a first mapping relationship between engine speed and engine vibration frequency was established using different engine speeds and the engine vibration frequency samples; a second mapping relationship between electric fan speed and electric fan vibration frequency was established using different electric fan speeds and the electric fan vibration frequency samples; a third mapping relationship between compressor speed and compressor vibration frequency was established using different compressor speeds and the compressor vibration frequency samples.

[0121] It should be noted that before establishing the mapping relationship, multiple data samples can be collected to establish the mapping relationship. Therefore, engine vibration frequency samples at different engine speeds can be collected, and the engine vibration frequency samples can be different engine vibration frequencies at different engine speeds.

[0122] By collecting fan speed data under different fan duty cycles, a mapping relationship between fan speed and fan duty cycle can be established, thereby collecting fan vibration frequency samples under different fan speed data. The fan vibration frequency samples are different fan vibration frequencies under different fan speed data.

[0123] By collecting compressor vibration frequency samples at different compressor speeds, the compressor vibration frequency samples represent different compressor vibration frequencies at different compressor speeds.

[0124] In practice, a primary mapping relationship between engine speed and engine vibration frequency can be established using samples of different engine speeds and engine vibration frequencies.

[0125] As one implementation method, the relationship between engine speed and engine vibration frequency can be calculated using the following formula 3:

[0126]

[0127] In equation 3 above, f i Let be the i-th dominant frequency of engine noise, i.e., the engine vibration frequency, where i is 2, n is the engine speed, m is the number of cylinders in the engine, and γ is the number of engine strokes. Since car engines are generally four-stroke, i.e., γ = 4 and m = 4, then equation 3 above can be transformed into equation 4 below:

[0128]

[0129] The first mapping relationship between engine speed and engine vibration frequency can be established through Equation 4 above.

[0130] In practical implementation, a second mapping relationship between electronic fan speed and electronic fan vibration frequency can be established through samples of different electronic fan speeds and electronic fan vibration frequencies, and a third mapping relationship between compressor speed and compressor vibration frequency can be established through samples of different compressor speeds and compressor vibration frequencies.

[0131] This embodiment acquires the first amplitude of the engine speed, the second amplitude of the electric fan speed, and the third amplitude of the compressor speed in the vehicle; obtains a first vibration signal, a second vibration signal, and a third vibration signal from the first amplitude, the second amplitude, and the third amplitude, respectively; synthesizes at least two of the first vibration signal, the second vibration signal, and the third vibration signal to obtain a composite vibration signal of the vehicle components; acquires the current engine speed, the current electric fan speed, and the current compressor speed of the vehicle; obtains the current engine vibration frequency corresponding to the current engine speed according to the first mapping relationship between engine speed and engine vibration frequency; and obtains the current engine vibration frequency according to the second mapping relationship between electric fan speed and electric fan vibration frequency. The system obtains the current electric fan vibration frequency corresponding to the current electric fan speed; it obtains the current compressor vibration frequency corresponding to the current compressor speed according to the third mapping relationship between the compressor speed and the compressor vibration frequency; it obtains the vibration frequency of the vehicle components through the current engine vibration frequency, the current electric fan vibration frequency, and the current compressor vibration frequency, and can quickly obtain multiple vibration signals based on the obtained amplitude, synthesize the vibration signals to obtain a vibration synthesis signal, thereby quickly determining whether there is abnormal noise in the vehicle components corresponding to the vibration synthesis signal; by obtaining the speed of each component and obtaining the frequency corresponding to the speed according to the corresponding mapping relationship, it can quickly obtain the component vibration frequency corresponding to the speed of the component according to the pre-established mapping relationship.

[0132] refer to Figure 5 , Figure 5 This is a flowchart illustrating the third embodiment of the vehicle noise adjustment method of the present invention.

[0133] Based on the first embodiment described above, step S40 of the vehicle abnormal noise adjustment method in this embodiment includes:

[0134] Step S401: Based on the peak and valley values, obtain the amplitude values ​​of at least two vibration signals in the vibration synthesis signal.

[0135] It should be noted that the amplitude values ​​of at least two vibration signals in the vibration synthesis signal can be obtained through the peak and valley values. For example, if the vibration synthesis signal is obtained by synthesizing the first vibration signal and the second vibration signal, then the amplitude value includes the first amplitude value and the second amplitude value.

[0136] Step S402: Obtain the amplitude ratio from the amplitude values ​​of at least two vibration signals.

[0137] It should be understood that the amplitude ratio can be calculated from the amplitude values. For example, if the amplitude values ​​are the first amplitude value and the second amplitude value, then the amplitude ratio = the first amplitude value / the second amplitude value.

[0138] Step S403: Obtain the vibration frequencies of at least two components through the vibration frequencies of the components.

[0139] In specific implementation, the vibration frequency of a component includes at least two of the engine vibration frequency, the electric fan vibration frequency, and the compressor vibration frequency. For example, if the vibration frequency of a component is the engine vibration frequency and the electric fan vibration frequency, then the vibration frequencies of at least two components are the engine vibration frequency and the electric fan vibration frequency.

[0140] Step S404: Obtain the frequency ratio by measuring the vibration frequencies of at least two components.

[0141] It should be noted that the frequency ratio can be obtained from the vibration frequencies of at least two components. For example, if the vibration frequencies of at least two components are the engine vibration frequency and the electric fan vibration frequency, then the frequency ratio = engine vibration frequency / electric fan vibration frequency.

[0142] Step S405: Adjust the amplitude ratio to outside the preset amplitude vibration range and adjust the frequency ratio to outside the preset frequency vibration range to complete the vehicle noise adjustment.

[0143] It should be noted that the preset amplitude beat interval is the interval in which the vibration produces abnormal noise, for example (0.33, 3.00). The amplitude ratio can be adjusted to be outside the preset amplitude beat interval, for example, the amplitude ratio can be adjusted to 0.3.

[0144] The preset frequency beat interval is the interval in which vibration produces abnormal noise, for example, [0.85, 1)∪(1, 1.18]. The frequency ratio can be adjusted to be outside the preset frequency beat interval, for example, the frequency ratio can be adjusted to 0.8.

[0145] As one implementation method, a preset vehicle performance table can be set in advance, thereby adjusting abnormal noises of the vehicle through the preset vehicle performance table. Step S405 specifically includes:

[0146] S4051: Determine the rotational speed of the component to be adjusted based on a preset vehicle performance table;

[0147] It should be noted that the preset vehicle performance table can be created during the development phase, as follows: Figure 6 As shown, Figure 6 This is a schematic diagram of a preset vehicle performance table. Figure 6 In the table, the vertical axis can represent engine speed, and the horizontal axis can represent electric fan speed or compressor speed. Therefore, the speed of the component to be adjusted can be determined by preset vehicle performance tables. The tables include suggested points for different engine speeds, compressor speeds, and electric fan speeds. For example, if the abnormal noise is obvious when the engine speed is 1180, the engine speed can be adjusted to a slightly mild condition, i.e., the engine speed is 1000.

[0148] In practice, the speed of the component to be adjusted can be the engine speed, compressor speed, or electric fan speed, which can be determined based on the change in the speed fluctuation.

[0149] Optionally, the step of determining the rotational speed of the component to be adjusted based on a preset vehicle performance table includes:

[0150] Based on a preset vehicle performance table, determine the engine speed fluctuation, electric fan speed fluctuation, and compressor speed fluctuation; select the speed fluctuation that satisfies the preset fluctuation change from the engine speed fluctuation, the electric fan speed fluctuation, and the compressor speed fluctuation to obtain the target speed fluctuation; and take the component speed corresponding to the target speed fluctuation as the speed of the component to be adjusted.

[0151] It should be noted that the engine speed fluctuation is the amount of movement required to shift the engine speed from a significant operating condition to a less significant one. For example, the amount of movement required to shift the engine speed from 1270 to 1210 is 2. The electric fan speed fluctuation / compressor speed fluctuation is the amount of movement required to shift the electric fan speed / compressor speed from a significant operating condition to a less significant one. For example, the amount of movement required to shift the electric fan speed / compressor speed from 69 to 74 is 6. The target speed fluctuation is the speed fluctuation with the smallest change among the speed fluctuations. For example, if the engine speed fluctuation is 2 and the electric fan speed fluctuation is 6, then the target speed fluctuation is the engine speed fluctuation. The engine speed corresponding to the engine speed fluctuation is taken as the speed of the component to be adjusted.

[0152] As an example, you can first adjust the speed of the component corresponding to the target speed fluctuation, and then adjust the speed of the other components. For example, if the electric fan speed fluctuation is the smallest, then adjust the electric fan speed first, and then adjust the engine speed.

[0153] S4052: Adjust the rotational speed of the component to be adjusted to obtain the target rotational speed;

[0154] In practice, the speed of the component to be adjusted can be adjusted. For example, the speed of the component to be adjusted can be adjusted to a recommended speed, based on the premise that it does not affect the sudden change in the current speed of the component. For example, if the speed of the component to be adjusted is the engine speed, then the engine speed can be adjusted to a recommended engine speed, based on the premise that it does not affect the sudden change in the current engine speed.

[0155] It should be understood that after adjusting the component speed, the target component speed can be obtained. For example, if the component speed before adjustment is 1120, the target component speed is 1000.

[0156] S4053: When the amplitude ratio corresponding to the rotational speed of the target component is outside the preset amplitude beat interval and the frequency ratio corresponding to the rotational speed of the target component is outside the preset frequency beat interval, the abnormal noise adjustment of the vehicle is completed.

[0157] It should be noted that when the amplitude ratio corresponding to the target component's rotational speed is outside the preset amplitude vibration range and the frequency ratio corresponding to the target component's rotational speed is outside the preset frequency vibration range, the vehicle's abnormal noise adjustment is completed.

[0158] In practice, the abnormal noise shutdown uses the predefined target value of the detected vibration synthesis signal as the diagnostic criterion.

[0159] like Figure 7 As shown, Figure 7 This is a schematic diagram of the overall process in this embodiment. It imports engine speed, electric fan duty cycle, compressor speed, and cooling system vibration data. A data mapping relationship is established and imported into the vehicle controller: a first mapping relationship is established between engine speed and engine vibration frequency; a second mapping relationship is established between electric fan speed and electric fan vibration frequency; and a third mapping relationship is established between compressor speed and compressor vibration frequency. The cooling system vibration is monitored for thermal management noise monitoring. A vibration composite signal is generated by superimposing vibration signals for noise diagnosis, and the vibration frequency magnitude is obtained. When abnormal noise occurs, intelligent active control is implemented, including adaptive adjustment of the engine power point, adjustment of the electric fan duty cycle speed, and adjustment of the compressor speed, thereby eliminating the abnormal noise.

[0160] This embodiment obtains the amplitude values ​​of at least two vibration signals in the vibration synthesis signal based on the peak and valley values; obtains the amplitude ratio from the amplitude values ​​of the at least two vibration signals; obtains the vibration frequencies of at least two components from the vibration frequencies of the components; obtains the frequency ratio from the vibration frequencies of the at least two components; adjusts the amplitude ratio to outside the preset amplitude beat vibration range, and adjusts the frequency ratio to outside the preset frequency beat vibration range to complete the vehicle's abnormal noise adjustment. By adjusting the amplitude ratio and frequency ratio to outside the beat vibration range, the vehicle's periodic vibration problem is solved, and the vehicle's performance is improved.

[0161] Reference Figure 8 , Figure 8 This is a structural block diagram of the first embodiment of the vehicle noise adjustment device of the present invention.

[0162] like Figure 8 As shown, the vehicle noise adjustment device proposed in this embodiment of the invention includes:

[0163] The acquisition module 10 is used to acquire the composite vibration signal and vibration frequency of the components in the vehicle.

[0164] The acquisition module 10 is also used to acquire the waveform characteristics and peak-valley values ​​of the vibration synthesis signal.

[0165] The determination module 20 is used to determine that there is an abnormal noise in the vehicle when the waveform characteristics meet the preset waveform characteristics, the peak-valley value is greater than or equal to the preset peak-valley threshold, and the component vibration frequency is greater than or equal to the preset vibration frequency threshold.

[0166] The adjustment module 30 is used to adjust vehicle abnormal noises based on the peak and valley values ​​and the vibration frequency of the component.

[0167] This embodiment acquires the vibration synthesis signal and vibration frequency of components in the vehicle; acquires the waveform characteristics and peak-valley values ​​of the vibration synthesis signal; when the waveform characteristics meet preset waveform characteristics, the peak-valley values ​​are greater than or equal to preset peak-valley thresholds, and the component vibration frequency is greater than or equal to preset vibration frequency thresholds, it determines that there is an abnormal noise in the vehicle; based on the peak-valley values ​​and the component vibration frequency, the abnormal noise of the vehicle is adjusted. This allows for quick and accurate identification of abnormal noise in the vehicle based on the acquired data, and by adjusting the abnormal noise of the vehicle through the peak-valley values ​​and component vibration frequency, the abnormal noise and discomfort of the vehicle can be resolved, improving the effect of vehicle abnormal noise adjustment and thus improving the vehicle's performance.

[0168] In one embodiment, the acquisition module 10 is further configured to acquire a first amplitude of engine speed, a second amplitude of electric fan speed, and a third amplitude of compressor speed in the vehicle; obtain a first vibration signal, a second vibration signal, and a third vibration signal through the first amplitude, the second amplitude, and the third amplitude, respectively; and synthesize at least two of the first vibration signal, the second vibration signal, and the third vibration signal to obtain a composite vibration signal of the components in the vehicle.

[0169] In one embodiment, the acquisition module 10 is further configured to acquire the vehicle's current engine speed, current electric fan speed, and current compressor speed; obtain the current engine vibration frequency corresponding to the current engine speed based on a first mapping relationship between engine speed and engine vibration frequency; obtain the current electric fan vibration frequency corresponding to the current electric fan speed based on a second mapping relationship between electric fan speed and electric fan vibration frequency; obtain the current compressor vibration frequency corresponding to the current compressor speed based on a third mapping relationship between compressor speed and compressor vibration frequency; and obtain the vibration frequency of components in the vehicle through the current engine vibration frequency, the current electric fan vibration frequency, and the current compressor vibration frequency.

[0170] In one embodiment, the acquisition module 10 is further configured to collect engine vibration frequency samples at different engine speeds; collect electric fan speed data at different electric fan duty cycles, and collect electric fan vibration frequency samples at different electric fan speed data; collect compressor vibration frequency samples at different compressor speeds; establish a first mapping relationship between engine speed and engine vibration frequency through different engine speeds and the engine vibration frequency samples; establish a second mapping relationship between electric fan speed and electric fan vibration frequency through different electric fan speeds and the electric fan vibration frequency samples; and establish a third mapping relationship between compressor speed and compressor vibration frequency through different compressor speeds and the compressor vibration frequency samples.

[0171] In one embodiment, the adjustment module 30 is further configured to obtain the amplitude values ​​of at least two vibration signals in the vibration synthesis signal based on the peak-valley values; obtain the amplitude ratio through the amplitude values ​​of the at least two vibration signals; obtain the vibration frequencies of at least two components through the vibration frequencies of the components; obtain the frequency ratio through the vibration frequencies of the at least two components; adjust the amplitude ratio to outside the preset amplitude beat vibration range, and adjust the frequency ratio to outside the preset frequency beat vibration range, thereby completing the vehicle's abnormal noise adjustment.

[0172] In one embodiment, the adjustment module 30 is further configured to determine the rotational speed of the component to be adjusted based on a preset vehicle performance table; adjust the rotational speed of the component to be adjusted to obtain the target component rotational speed; and complete the vehicle noise adjustment when the amplitude ratio corresponding to the target component rotational speed is outside the preset amplitude beat vibration range and the frequency ratio corresponding to the target component rotational speed is outside the preset frequency beat vibration range.

[0173] In one embodiment, the adjustment module 30 is further configured to determine the engine speed fluctuation, electric fan speed fluctuation, and compressor speed fluctuation based on a preset vehicle performance table; select a speed fluctuation that satisfies a preset fluctuation change from the engine speed fluctuation, the electric fan speed fluctuation, and the compressor speed fluctuation to obtain a target speed fluctuation; and use the component speed corresponding to the target speed fluctuation as the component speed to be adjusted.

[0174] Furthermore, this embodiment of the invention also proposes a storage medium storing a vehicle noise adjustment program, which, when executed by a processor, implements the steps of the vehicle noise adjustment method described above.

[0175] Since this storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0176] It should be understood that the above are merely illustrative examples and do not constitute any limitation on the technical solutions of the present invention. In specific applications, those skilled in the art can make settings as needed, and the present invention does not impose any restrictions on this.

[0177] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this invention. In practical applications, those skilled in the art can select some or all of the workflow to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here.

[0178] In addition, for technical details not described in detail in this embodiment, please refer to the vehicle noise adjustment method provided in any embodiment of the present invention, which will not be repeated here.

[0179] Furthermore, it should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0180] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0181] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as read-only memory (ROM) / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0182] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A method for adjusting abnormal noises in a vehicle, characterized in that, The method for adjusting abnormal vehicle noises includes: Acquire the synthesized vibration signals and vibration frequencies of components in the vehicle; Obtain the waveform characteristics and peak-to-valley values ​​of the vibration synthesis signal; When the waveform characteristics meet the preset waveform characteristics, the peak-to-valley value is greater than or equal to the preset peak-to-valley threshold, and the component vibration frequency is greater than or equal to the preset vibration frequency threshold, it is determined that there is an abnormal noise in the vehicle; Vehicle noise adjustment is performed based on the peak and valley values ​​and the vibration frequency of the component. The adjustment of vehicle abnormal noise based on the peak-valley value and the vibration frequency of the component includes: Based on the peak and valley values, the amplitude values ​​of at least two vibration signals in the vibration synthesis signal are obtained; The amplitude ratio is obtained by using the amplitude values ​​of at least two vibration signals; The vibration frequencies of at least two components are obtained through the vibration frequencies of the aforementioned components; The frequency ratio is obtained by measuring the vibration frequencies of at least two components; The amplitude ratio is adjusted to be outside the preset amplitude vibration range, and the frequency ratio is adjusted to be outside the preset frequency vibration range, thereby completing the adjustment of abnormal noise in the vehicle.

2. The vehicle noise adjustment method as described in claim 1, characterized in that, Acquire composite vibration signals of components in the vehicle, including: The first amplitude of the engine speed, the second amplitude of the electric fan speed, and the third amplitude of the compressor speed in the vehicle are obtained. The first vibration signal, the second vibration signal, and the third vibration signal are obtained through the first amplitude, the second amplitude, and the third amplitude, respectively. By combining at least two of the first vibration signal, the second vibration signal, and the third vibration signal, a composite vibration signal of a component in the vehicle is obtained.

3. The vehicle noise adjustment method as described in claim 1, characterized in that, Obtain the vibration frequencies of components in the vehicle, including: Obtain the vehicle's current engine speed, current electric fan speed, and current compressor speed; The current engine vibration frequency corresponding to the current engine speed is obtained based on the first mapping relationship between engine speed and engine vibration frequency. The current electronic fan vibration frequency corresponding to the current electronic fan speed is obtained based on the second mapping relationship between the electronic fan speed and the electronic fan vibration frequency. The current compressor vibration frequency corresponding to the current compressor speed is obtained based on the third mapping relationship between the compressor speed and the compressor vibration frequency. The vibration frequencies of components in the vehicle are obtained by using the current engine vibration frequency, the current electric fan vibration frequency, and the current compressor vibration frequency.

4. The vehicle noise adjustment method as described in claim 3, characterized in that, Before obtaining the current engine vibration frequency corresponding to the current engine speed based on the first mapping relationship between engine speed and engine vibration frequency, the method further includes: Engine vibration frequency samples were collected at different engine speeds; Collect fan speed data under different fan duty cycles, and collect fan vibration frequency samples under different fan speed data; Samples of compressor vibration frequencies were collected at different compressor speeds. A first mapping relationship between engine speed and engine vibration frequency is established by using different engine speeds and engine vibration frequency samples. A second mapping relationship between the electric fan speed and the electric fan vibration frequency is established by using different electric fan speeds and samples of the electric fan vibration frequency. A third mapping relationship between compressor speed and compressor vibration frequency is established by using samples of different compressor speeds and compressor vibration frequencies.

5. The vehicle noise adjustment method as described in claim 1, characterized in that, The step of adjusting the amplitude ratio to outside the preset amplitude beat range and adjusting the frequency ratio to outside the preset frequency beat range to complete the vehicle's abnormal noise adjustment includes: The rotational speed of the component to be adjusted is determined based on a preset vehicle performance table. The rotational speed of the component to be adjusted is adjusted to obtain the rotational speed of the target component; When the amplitude ratio corresponding to the rotational speed of the target component is outside the preset amplitude beat interval and the frequency ratio corresponding to the rotational speed of the target component is outside the preset frequency beat interval, the abnormal noise adjustment of the vehicle is completed.

6. The vehicle noise adjustment method as described in claim 5, characterized in that, The process of determining the rotational speed of the component to be adjusted based on a preset vehicle performance table includes: The engine speed fluctuation, electric fan speed fluctuation, and compressor speed fluctuation are determined based on the preset vehicle performance table. The target speed fluctuation is obtained by selecting the speed fluctuation that satisfies the preset fluctuation change from the engine speed fluctuation, the electric fan speed fluctuation, and the compressor speed fluctuation; The component speed corresponding to the target speed fluctuation is taken as the component speed to be adjusted.

7. A vehicle noise adjustment device, characterized in that, The vehicle noise adjustment device includes: The acquisition module is used to acquire the synthesized vibration signals and vibration frequencies of components in the vehicle. The acquisition module is also used to acquire the waveform characteristics and peak-valley values ​​of the vibration synthesis signal; The determination module is used to determine that there is an abnormal noise in the vehicle when the waveform characteristics meet the preset waveform characteristics, the peak-valley value is greater than or equal to the preset peak-valley threshold, and the component vibration frequency is greater than or equal to the preset vibration frequency threshold. The adjustment module is used to adjust vehicle abnormal noises based on the peak and valley values ​​and the vibration frequency of the component; The adjustment module is further configured to obtain the amplitude values ​​of at least two vibration signals in the vibration synthesis signal based on the peak and valley values; obtain the amplitude ratio through the amplitude values ​​of the at least two vibration signals; obtain the vibration frequencies of at least two components through the vibration frequencies of the components; obtain the frequency ratio through the vibration frequencies of the at least two components; adjust the amplitude ratio to outside the preset amplitude beat vibration range, and adjust the frequency ratio to outside the preset frequency beat vibration range, thereby completing the adjustment of abnormal noise in the vehicle.

8. A vehicle noise adjustment device, characterized in that, The vehicle noise adjustment device includes: a memory, a processor, and a vehicle noise adjustment program stored in the memory and executable on the processor, the vehicle noise adjustment program being configured to implement the vehicle noise adjustment method as described in any one of claims 1 to 6.

9. A storage medium, characterized in that, The storage medium stores a vehicle noise adjustment program, which, when executed by a processor, implements the vehicle noise adjustment method as described in any one of claims 1 to 6.

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