Method and equipment for reducing noise of range extender and storage medium

Abstract

The invention provides a method and equipment for reducing noise of a range extender and a storage medium, and the method comprises the steps: for each electromagnetic actuator, obtaining a frame vibration signal and a crankshaft rotation speed signal corresponding to the electromagnetic actuator, and determining a reverse suppression signal according to the frame vibration signal and the crankshaft rotation speed signal; controlling the electromagnetic actuator according to the reverse suppression signal; acquiring the current sound intensity of the range extender, and judging whether the current sound intensity is greater than first preset intensity or not; and if the current sound intensity is greater than the first preset intensity, updating the reverse suppression signal, and returning to execute the step of controlling the electromagnetic actuator according to the reverse suppression signal. According to the technical scheme, feedback adjustment of noise suppression of the range extender is achieved, and the vehicle comfort is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle range extender, and particularly relates to a method, device and storage medium for reducing noise of a range extender. BACKGROUND

[0002] The traditional passive suspension system relies on traditional rubber pads for noise reduction, which has certain limitations. Since the stiffness and damping of the rubber pad are fixed, it cannot dynamically adapt to the low-frequency vibration frequency generated when the range extender starts, and the operation low-frequency resonance suppression capability is poor. Moreover, the rubber pad will age and fatigue after long-term use, resulting in performance attenuation.

[0003] In the traditional active suspension, the traditional decoupling film-inertial channel type hydraulic suspension can reduce the dynamic stiffness of the hydraulic suspension to a certain extent in the low-frequency state due to the flow of ethylene glycol in the inertial channel. However, as the excitation increases, the flow of ethylene glycol in the inertial channel is blocked, and the decoupling film can expand the frequency range of shock absorption. However, if the frequency continues to rise, the hydraulic suspension will appear high-frequency hardening phenomenon, resulting in vibration transmission to the cab and affecting the driving experience. SUMMARY

[0004] In view of the above defects or deficiencies in the prior art, the present application aims to provide a method, device and storage medium for reducing noise of a range extender, so as to realize feedback regulation of range extender noise suppression and effectively improve vehicle comfort.

[0005] The method for reducing noise of a range extender provided by the present application comprises the following steps. For each electromagnetic actuator, the corresponding vehicle frame vibration signal and the crankshaft speed signal of the electromagnetic actuator are obtained, and a reverse suppression signal is determined according to the vehicle frame vibration signal and the crankshaft speed signal. The electromagnetic actuator is controlled according to the reverse suppression signal. The current sound intensity of the range extender is obtained, and it is judged whether the current sound intensity is greater than a first preset intensity. In response to the current sound intensity being greater than the first preset intensity, the reverse suppression signal is updated, and the step of controlling the electromagnetic actuator according to the reverse suppression signal is executed.

[0006] According to the technical scheme provided by the present application, the step of updating the reverse suppression signal and executing the step of controlling the electromagnetic actuator according to the reverse suppression signal in response to the current sound intensity being greater than the first preset intensity can be selected, which comprises the following steps. In response to the current sound intensity being greater than the first preset intensity, it is judged whether the current amplitude adjustment amplitude is greater than a preset minimum adjustment value. in response to the current amplitude adjustment range being greater than the preset adjustment minimum value, obtaining a historical sound intensity of the range extender; in response to the historical sound intensity being greater than or equal to the current sound intensity, updating the reverse suppression signal according to the current amplitude adjustment direction and the current amplitude adjustment range, and returning to performing the step of controlling the electromagnetic actuator according to the reverse suppression signal; in response to the historical sound intensity being less than the current sound intensity, taking a reverse direction of the current amplitude adjustment direction as a new current amplitude adjustment direction, determining a new current amplitude adjustment range according to the current amplitude adjustment range and a preset adjustment step length, updating the reverse suppression signal according to the new current amplitude adjustment direction and the new current amplitude adjustment range, and returning to performing the step of controlling the electromagnetic actuator according to the reverse suppression signal.

[0007] According to the technical scheme provided by the embodiment of the application, optionally, before the step of obtaining the current sound intensity of the range extender and determining whether the current sound intensity is greater than a first preset intensity, the method further comprises: obtaining a cab sound signal, and determining a cab sound intensity according to the cab sound signal; in response to the cab sound intensity being greater than a second preset intensity, triggering the step of obtaining the current sound intensity of the range extender and determining whether the current sound intensity is greater than the first preset intensity; wherein the second preset intensity is greater than the first preset intensity.

[0008] According to the technical scheme provided by the embodiment of the application, optionally, the step of controlling the electromagnetic actuator according to the reverse suppression signal comprises: performing power amplifier processing on the reverse suppression signal to obtain a power amplifier suppression signal; driving the electromagnetic actuator according to the power amplifier suppression signal.

[0009] According to the technical scheme provided by the embodiment of the application, optionally, the method further comprises: obtaining a driving current value corresponding to the electromagnetic actuator; in response to an absolute value of the driving current value being less than a preset current minimum value or the absolute value of the driving current value being greater than a preset current maximum value, controlling the electromagnetic actuator to stop and driving an electromagnetic valve to open, so as to open a preset passage between the upper liquid chamber and the lower liquid chamber; wherein the preset passage is arranged in parallel with the inertial passage, the electromagnetic valve is used to control opening and closing of the preset passage, and a passage size of the preset passage is less than a passage size of the inertial passage.

[0010] According to the technical scheme provided in the embodiment of the present application, optionally, after the driving of the electromagnetic valve is opened, the method further comprises: obtaining a current sound intensity of the range extender, and determining whether the current sound intensity is greater than a first preset intensity; in response to the current sound intensity being greater than the first preset intensity, obtaining a current electromagnetic valve opening degree, and determining whether the current electromagnetic valve opening degree is greater than a preset minimum opening degree; in response to the current electromagnetic valve opening degree being greater than the preset minimum opening degree, updating the current electromagnetic valve opening degree according to a preset opening degree adjustment step; driving the electromagnetic valve according to the updated current electromagnetic valve opening degree, and returning to the step of obtaining the current sound intensity of the range extender until the current sound intensity is less than or equal to the first preset intensity or the current electromagnetic valve opening degree is less than or equal to the preset minimum opening degree.

[0011] According to the technical scheme provided in the embodiment of the present application, optionally, after the control of the electromagnetic actuator is stopped, the method further comprises: generating an electromagnetic actuator failure signal, and sending the electromagnetic actuator failure signal to a target device.

[0012] According to the technical scheme provided in the embodiment of the present application, optionally, before the step of obtaining, for each electromagnetic actuator, a vehicle frame vibration signal and a crankshaft speed signal corresponding to the electromagnetic actuator, the method further comprises: obtaining a vehicle battery power; in response to the vehicle battery power being less than a power threshold, controlling the vehicle to start the range extender, and triggering the step of obtaining, for each electromagnetic actuator, a vehicle frame vibration signal and a crankshaft speed signal corresponding to the electromagnetic actuator.

[0013] The embodiment of the present application further provides an electronic device, which comprises: a processor and a memory; the processor is configured to execute the steps of the method for reducing noise of a range extender by invoking programs or instructions stored in the memory.

[0014] The embodiment of the present application further provides a computer readable storage medium, which stores programs or instructions, and the programs or instructions enable a computer to execute the steps of the method for reducing noise of a range extender.

[0015] To sum up, the application provides a method for reducing noise of a range extender, for each electromagnetic actuator, a corresponding vehicle frame vibration signal and a crankshaft speed signal of the electromagnetic actuator are acquired, a reverse suppression signal is determined according to the vehicle frame vibration signal and the crankshaft speed signal, and the electromagnetic actuator is controlled according to the reverse suppression signal, so as to more accurately control the electromagnetic actuator to reduce noise generated by starting of the range extender, and then, a current sound intensity of the range extender is acquired, it is judged whether the current sound intensity is greater than a first preset intensity, and in response to the current sound intensity being greater than the first preset intensity, the reverse suppression signal is updated, and the step of controlling the electromagnetic actuator according to the reverse suppression signal is executed again, so as to further adjust the reverse suppression signal in combination with the noise condition to reduce generation of noise, feedback adjustment of noise suppression of the range extender is realized, and vehicle comfort is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a flowchart of a method for reducing noise of a range extender provided by an embodiment of the application; Figure 2 is a working principle diagram of a primary and secondary suspension system for reducing noise of a range extender provided by an embodiment of the application; Figure 3 is a flowchart of another method for reducing noise of a range extender provided by an embodiment of the application; Figure 4 is a principle block diagram of a device for reducing noise of a range extender provided by an embodiment of the application; Figure 5 is a structural schematic diagram of an electronic device provided by an embodiment of the application. DETAILED DESCRIPTION

[0017] The application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related application, and not to limit the application. In addition, it should be noted that only parts related to the application are shown in the drawings for ease of description.

[0018] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other without conflict. The application will be described in detail below with reference to the drawings and embodiments.

[0019] Traditional passive suspension system relies on fixed stiffness and damping design, which can only suppress vibration in specific working conditions, but in the face of complex excitation in wide speed range of range extender, the vibration isolation efficiency is greatly reduced, leading to low-frequency structure noise transmission to the vehicle body, causing cabin resonance. Traditional rubber pad noise reduction has certain limitations. Due to the fixed stiffness and damping of rubber pad, it cannot dynamically adapt to the low-frequency vibration frequency generated during the start of range extender, resulting in poor low-frequency resonance suppression capability. Moreover, rubber pad is easily affected by temperature, oil stains and stress during long-term use, and aging and fatigue may occur, resulting in reduced vibration efficiency and performance degradation. At the same time, the vibration frequency spectrum of range extender changes greatly under different load conditions, and passive suspension cannot be adjusted in real time, resulting in fluctuation of vibration isolation effect and insufficient operation adaptability under multiple working conditions.

[0020] Traditional active suspension system may still have residual low-frequency noise transmitted to the cab, affecting driving comfort and high-end experience. In addition, the traditional decoupling membrane-inertial channel type hydraulic suspension can reduce the dynamic stiffness of the hydraulic suspension to some extent under medium and low frequency conditions due to the flow of ethylene glycol in the inertial channel, but as the excitation increases, the flow of ethylene glycol in the inertial channel is blocked, the frequency range of the decoupling membrane can be expanded and the shock can be reduced, but when the frequency continues to rise, the hydraulic suspension still has high-frequency hardening phenomenon, leading to vibration transmission to the cab and affecting the driving experience.

[0021] The noise of range extender during start and stop is large, and due to the complex excitation in wide speed range of range extender, the frequency changes abruptly and the range is wide, and there is still residual noise flowing into the cab after traditional active suspension noise reduction. Passive suspension has problems such as poor low-frequency resonance suppression capability, aging and performance degradation, and insufficient adaptability under multiple working conditions due to material reasons, resulting in poor dynamic response. When the vibration is high frequency, the decoupling membrane of the decoupling membrane-inertial channel type hydraulic suspension is fixed, the output damping is fixed, and the system stiffness cannot be adaptively adjusted. The moving coil of the electromagnetic actuator is wound by enameled wire, which is easy to wear during movement, and the enameled wire is easy to break down, resulting in failure of the electromagnetic actuator and reduction of high-frequency characteristics.

[0022] Figure 1 is a flowchart of a method for reducing noise of a range extender provided by an embodiment of the present application. Referring to Figure 1 , the method for reducing noise of the range extender specifically comprises: S110, for each electromagnetic actuator, obtaining a vehicle frame vibration signal and a crankshaft speed signal corresponding to the electromagnetic actuator, and determining a reverse suppression signal according to the vehicle frame vibration signal and the crankshaft speed signal.

[0023] Figure 2This is a schematic diagram illustrating the working principle of an active / passive suspension system for reducing range extender noise, provided in an embodiment of this application. For example, the inertial channel provided by the decoupling membrane-inertial channel type hydraulic suspension 210 can be a spiral inertial channel 215. Figure 2 Take the spiral inertial channel 215 as an example. Figure 2 As shown, the system mainly consists of a rubber main spring 212, an upper liquid chamber 213, a spiral inertial channel 215, a decoupling membrane 214, a lower liquid chamber 217, a fixed bracket 218, and an electromagnetic actuator 220. The upper liquid chamber 213 contains ethylene glycol liquid, which is connected to the lower liquid chamber 217 via the spiral inertial channel 215. When the range extender 211 vibrates at low frequencies, the ethylene glycol can flow back and forth through the spiral inertial channel 215. Viscous friction converts vibration energy into heat energy, reducing low-frequency vibrations transmitted to the vehicle body and providing a certain degree of vibration isolation. When there is high-frequency, small-amplitude vibration, the pressure in the upper liquid chamber 213 fluctuates rapidly. The decoupling membrane 214 cannot respond in time due to inertia and closes, preventing the ethylene glycol from flowing back and forth through the spiral inertial channel 215. The system stiffness cannot be adjusted adaptively. In this case, the flow resistance of the ethylene glycol can be controlled by activating the electromagnetic actuator 220. The solenoid valve 216 will be explained in a later example.

[0024] The electromagnetic actuator 220 consists of a moving coil (composed of an enameled coil 223 and a magnetic core 224), a permanent magnet 225, a return spring 221, and a threaded rod 222. When a signal is applied to the moving coil, it can move axially within the magnetic field generated by the permanent magnet 225. This movement, via the threaded rod 222, drives the decoupling membrane 214 in the decoupling membrane-inertial channel hydraulic suspension 210. The force F generated by the interaction between the energized coil and the magnetic field generated by the permanent magnet 225 is: F = BLI, where B is the magnetic field strength, L is the length of the enameled coil 223, and I is the current in the energized coil. In other words, when a current with amplitude and phase is applied to the moving coil, an Ampere force with a certain phase and amplitude is generated, thereby driving the decoupling membrane 214 to move. This reduces the dynamic stiffness of the suspension to a certain extent, thus improving the vibration isolation performance of the suspension under high-frequency, low-amplitude excitation. Each range extender 211 corresponds to an electromagnetic actuator 220, which is used to reduce the noise of the corresponding range extender 211. The frame vibration signal is the vibration signal collected by the corresponding acceleration sensor on the frame, which can include active vibration signals and passive vibration signals. The crankshaft speed signal is used to transmit the number of revolutions per minute of the crankshaft of the range extender engine. The reverse suppression signal is used to suppress the vibration of the range extender.

[0025] Specifically, since the electromagnetic actuator corresponds to the range extender, the range extender is installed on the vehicle frame, and thus the vehicle frame corresponding to each electromagnetic actuator can be determined. For each electromagnetic actuator, the vehicle frame vibration signal corresponding to the electromagnetic actuator can be acquired through the pre-installed sensor, and the crankshaft speed signal of the range extender can be acquired through the CAN (Controller Area Network) unit. By analyzing the vehicle frame vibration signal and the crankshaft speed signal, the frequency and amplitude of the vibration can be extracted, and the reverse processing of the signal can be performed to obtain the reverse suppression signal.

[0026] S120, controlling the electromagnetic actuator according to the reverse suppression signal.

[0027] Specifically, the electromagnetic actuator can be driven by the reverse suppression signal to enable the electromagnetic actuator to drive the decoupling film to move, adjust the flow resistance of the ethylene glycol, offset the vibration of the range extender, and reduce the noise generated by the range extender.

[0028] On the basis of the above example, the electromagnetic actuator can be controlled according to the reverse suppression signal in the following manner: amplifying the reverse suppression signal to obtain an amplifier suppression signal; driving the electromagnetic actuator according to the amplifier suppression signal.

[0029] The amplifier suppression signal is a signal obtained by amplifying the reverse suppression signal.

[0030] Specifically, the reverse suppression signal can be amplified by a power amplifier to obtain the amplifier suppression signal. The power amplifier can be pre-configured with parameters such as amplification multiple according to the suppression requirement and test results. Then, the amplifier suppression signal is input to the electromagnetic actuator to drive the electromagnetic actuator to move and drive the decoupling film to move.

[0031] S130, acquiring the current sound intensity of the range extender and determining whether the current sound intensity is greater than a first preset intensity.

[0032] The current sound intensity is the intensity of the noise that still exists after the noise generated by the range extender after starting is reduced by the electromagnetic actuator. The first preset intensity is a sound intensity that is pre-set for determining whether to adjust the reverse suppression signal corresponding to the electromagnetic actuator. It can be understood that when the current sound intensity reaches the first preset intensity, it can be considered that the noise reduction effect is poor, which may be due to insufficient movement of the electromagnetic actuator or excessive movement of the electromagnetic actuator.

[0033] Specifically, the current sound intensity of the range extender can be obtained through the sound receiving device on the range extender, or the sound in the cab can be obtained, and the sound intensity corresponding to the vibration frequency of the range extender is determined through frequency analysis, that is, the current sound intensity of the range extender. Then, the current sound intensity is compared with the first preset intensity to determine whether the current sound intensity is greater than the first preset intensity.

[0034] On the basis of the above examples, before obtaining the current sound intensity of the range extender and determining whether the current sound intensity is greater than the first preset intensity, the noise in the cab can be first determined, and the noise reduction of the range extender is corrected if the noise is too large, thereby saving resources while ensuring the comfort of the cab: Obtaining a cab sound signal, and determining a cab sound intensity according to the cab sound signal; In response to the cab sound intensity being greater than a second preset intensity, the step of obtaining the current sound intensity of the range extender and determining whether the current sound intensity is greater than the first preset intensity is triggered.

[0035] The cab sound signal is a sound signal collected by a sound receiving device (such as a microphone unit) arranged in the cab. The cab sound intensity is obtained by intensity calculation of the cab sound signal and is expressed in decibels (dB). The second preset intensity is a threshold value between comfortable and noisy sounds that is pre-set according to human hearing, which can be set according to experience. The second preset intensity is greater than the first preset intensity.

[0036] Specifically, the cab sound signal can be obtained through the sound receiving device arranged in the cab. The cab sound intensity can be obtained by intensity analysis and calculation of the cab sound signal. It is determined whether the cab sound intensity is greater than the second preset intensity. If the cab sound intensity is greater than the second preset intensity, it means that the noise in the cab is large, and it is necessary to further determine whether the noise of the range extender after noise reduction is still too large. Therefore, the step of obtaining the current sound intensity of the range extender and determining whether the current sound intensity is greater than the first preset intensity can be triggered. If the cab sound intensity is less than or equal to the second preset intensity, it means that the noise in the cab is within the acceptable range of human ears, and the vehicle occupants will not feel uncomfortable. Therefore, there is no need to adjust the action of the electromagnetic actuator in the subsequent operation, thereby reducing the control link and resource use.

[0037] S140, in response to the current sound intensity being greater than the first preset intensity, updating the reverse suppression signal, and returning to the step of controlling the electromagnetic actuator according to the reverse suppression signal.

[0038] Specifically, if the current sound intensity is greater than the first preset intensity, it indicates that the noise of the range extender is still relatively large after the noise of the range extender is reduced, and the amplitude of the reverse suppression signal needs to be adjusted to further reduce the noise of the range extender, that is, the reverse suppression signal can be updated according to the noise condition, and the step of controlling the electromagnetic actuator according to the reverse suppression signal is returned to execute to re-control the electromagnetic actuator to reduce the noise.

[0039] On the basis of the above examples, the reverse suppression signal can be updated and the step of controlling the electromagnetic actuator according to the reverse suppression signal is returned to execute in response to the current sound intensity being greater than the first preset intensity in the following manner: In response to the current sound intensity being greater than the first preset intensity, it is determined whether the current amplitude adjustment amplitude is greater than a preset adjustment minimum value. In response to the current amplitude adjustment amplitude being greater than the preset adjustment minimum value, the historical sound intensity of the range extender is obtained. In response to the historical sound intensity being greater than or equal to the current sound intensity, the reverse suppression signal is updated according to the current amplitude adjustment direction and the current amplitude adjustment amplitude, and the step of controlling the electromagnetic actuator according to the reverse suppression signal is returned to execute. In response to the historical sound intensity being less than the current sound intensity, the reverse direction of the current amplitude adjustment direction is taken as a new current amplitude adjustment direction, a new current amplitude adjustment amplitude is determined according to the current amplitude adjustment amplitude and a preset adjustment step length, and the reverse suppression signal is updated according to the new current amplitude adjustment direction and the new current amplitude adjustment amplitude, and the step of controlling the electromagnetic actuator according to the reverse suppression signal is returned to execute.

[0040] The current amplitude adjustment amplitude is the absolute value of the difference between the amplitudes of the reverse suppression signals at the current adjustment and the last adjustment. The preset adjustment minimum value is a preset minimum value of the absolute values of the differences between the amplitudes of the reverse suppression signals at adjacent two adjustments. The historical sound intensity is the sound intensity of the range extender after the last adjustment, or the sound intensity of the range extender before the adjustment if the last adjustment is not performed using the reverse suppression signal. The current amplitude adjustment direction is the adjustment direction of the amplitudes of the reverse suppression signals at the current adjustment and the last adjustment. The preset adjustment step length is a step length used when the current amplitude adjustment amplitude is adjusted.

[0041] Specifically, if the current sound intensity is greater than the first preset intensity, it indicates that the range extender noise is still relatively large. It is first determined whether the current amplitude adjustment amplitude is greater than a preset adjustment minimum value, that is, whether the current amplitude adjustment amplitude can be adjusted to be reduced. If the current amplitude adjustment amplitude is greater than the preset adjustment minimum value, the historical sound intensity of the range extender is obtained, and then the size relationship between the historical sound intensity and the current sound intensity is determined, so as to determine the adjustment direction of the amplitude. If the historical sound intensity is greater than or equal to the current sound intensity, the effect of the current use of the reverse suppression signal to control the electromagnetic actuator is better than that of the last use of the reverse suppression signal, so that the adjustment can be continued in the same direction, that is, the reverse suppression signal is adjusted according to the current amplitude adjustment direction and the current amplitude adjustment amplitude, so as to update the reverse suppression signal, and return to execute the step of controlling the electromagnetic actuator according to the reverse suppression signal, so as to perform the next sound intensity acquisition and comparison. If the historical sound intensity is less than the current sound intensity, the effect of the current use of the reverse suppression signal to control the electromagnetic actuator is worse than that of the last use of the reverse suppression signal, which indicates that there is a possibility of over-adjustment, so that the adjustment cannot be continued in the current amplitude adjustment direction, and needs to be adjusted in the opposite direction. Therefore, the opposite direction of the current amplitude adjustment direction is taken as a new current amplitude adjustment direction, the current amplitude adjustment amplitude is reduced by a preset adjustment step to obtain a new current amplitude adjustment amplitude, the reverse suppression signal is adjusted according to the new current amplitude adjustment direction and the new current amplitude adjustment amplitude, so as to update the reverse suppression signal, and return to execute the step of controlling the electromagnetic actuator according to the reverse suppression signal, so as to perform the next sound intensity acquisition and comparison. If the current amplitude adjustment amplitude is less than or equal to the preset adjustment minimum value, it indicates that the amplitude adjustment cannot be continued. The size of the historical sound intensity and the current sound intensity can be compared. If the historical sound intensity is greater than or equal to the current sound intensity, the reverse suppression signal remains unchanged. If the historical sound intensity is less than the current sound intensity, the reverse suppression signal corresponding to the historical sound intensity is taken as a new reverse suppression signal, and the step of controlling the electromagnetic actuator according to the reverse suppression signal is executed.

[0042] The method for reducing noise of the range extender provided by the embodiments of the present application comprises the following steps: acquiring, for each electromagnetic actuator, a corresponding vehicle frame vibration signal and a corresponding crankshaft speed signal; determining a reverse suppression signal according to the vehicle frame vibration signal and the crankshaft speed signal; and controlling the electromagnetic actuator according to the reverse suppression signal. In this way, the electromagnetic actuator can be more accurately controlled to reduce the noise generated by the start of the range extender. Furthermore, the current sound intensity of the range extender is acquired, and it is determined whether the current sound intensity is greater than a first preset intensity. In response to the current sound intensity being greater than the first preset intensity, the reverse suppression signal is updated, and the step of controlling the electromagnetic actuator according to the reverse suppression signal is executed again. In this way, the noise can be further reduced by adjusting the reverse suppression signal in combination with the noise condition, and feedback adjustment of the range extender noise suppression is realized, thereby effectively improving the comfort of the vehicle.

[0043] Figure 3 is a flowchart of another method for reducing noise of the range extender provided by the embodiments of the present application. On the basis of the above-mentioned embodiments, a processing mode when the electromagnetic actuator fails is added, that is, a pre-set channel between the upper liquid chamber and the lower liquid chamber is opened by introducing the electromagnetic valve control. The process is specifically exemplarily described. Referring to Figure 3 The method for reducing noise of the range extender specifically comprises the following steps: S210, for each electromagnetic actuator, acquiring a corresponding vehicle frame vibration signal and a corresponding crankshaft speed signal, and determining a reverse suppression signal according to the vehicle frame vibration signal and the crankshaft speed signal.

[0044] S220, controlling the electromagnetic actuator according to the reverse suppression signal.

[0045] S230, acquiring the current sound intensity of the range extender, and determining whether the current sound intensity is greater than a first preset intensity.

[0046] S240, in response to the current sound intensity being greater than the first preset intensity, updating the reverse suppression signal, and executing the step of controlling the electromagnetic actuator according to the reverse suppression signal again.

[0047] S250, acquiring a corresponding driving current value of the electromagnetic actuator.

[0048] The driving current value is the current value for driving the electromagnetic actuator, that is, the current value output to the electromagnetic actuator when the electromagnetic actuator is controlled according to the reverse suppression signal.

[0049] Specifically, the corresponding driving current value of the electromagnetic actuator can be detected and acquired by the current detection unit in real time or periodically.

[0050] S260, in response to the absolute value of the driving current value being less than the preset current minimum value or the absolute value of the driving current value being greater than the preset current maximum value, the electromagnetic actuator is controlled to stop, and the electromagnetic valve is driven to open to open the preset passage between the upper liquid chamber and the lower liquid chamber.

[0051] The preset current minimum value is a preset current value for judging a circuit break of the electromagnetic actuator. The preset current maximum value is a preset current value for judging a circuit short of the electromagnetic actuator. The preset passage is arranged in parallel with the inertial passage. The electromagnetic valve is used to control the opening or closing of the preset passage between the upper liquid chamber and the lower liquid chamber, and can also control the passage size. The passage size of the preset passage is smaller than the passage size of the inertial passage, so as to increase the flow resistance of the ethylene glycol between the upper liquid chamber and the lower liquid chamber.

[0052] Specifically, if the absolute value of the driving current value is less than the preset current minimum value, it can be determined that the circuit of the electromagnetic actuator is broken. If the absolute value of the driving current value is greater than the preset current maximum value, it can be determined that the circuit of the electromagnetic actuator is short. Both of the above conditions indicate that the electromagnetic actuator is faulty, so the electromagnetic actuator is controlled to stop, that is, the electromagnetic actuator is stopped from being driven by the reverse inhibition signal. A backup scheme is used, that is, the electromagnetic valve is driven to open, so as to control the opening of the preset passage between the upper liquid chamber and the lower liquid chamber by the electromagnetic valve, for the liquid (such as ethylene glycol fluid) between the upper liquid chamber and the lower liquid chamber to flow. Since the passage size of the preset passage is smaller than the passage size of the inertial passage, the preset passage can provide greater fluid resistance than the inertial passage, so as to facilitate the liquid in the suspension to be forced to pass through the preset passage controlled by the electromagnetic valve when the range extender vibrates at a high frequency.

[0053] It can be understood that if there are two left and right range extenders, each corresponding to an electromagnetic actuator, then the absolute value of the driving current value of at least one electromagnetic actuator is less than the preset current minimum value, or the absolute value of the driving current value is greater than the preset current maximum value, which can trigger the operation of controlling the electromagnetic actuator to stop and driving the electromagnetic valve to open to open the preset passage between the upper liquid chamber and the lower liquid chamber, without all the above conditions being met.

[0054] On the basis of the above example, after the electromagnetic valve is driven to open, the opening degree of the electromagnetic valve can be further adjusted in combination with the current sound intensity of the range extender. Specifically, the current sound intensity of the range extender can be obtained, and it is judged whether the current sound intensity is greater than a first preset intensity. In response to the current sound intensity being greater than the first preset intensity, the current electromagnetic valve opening degree is obtained, and it is judged whether the current electromagnetic valve opening degree is greater than a preset minimum opening degree. In response to being greater than the preset minimum opening degree, the current electromagnetic valve opening degree is updated according to a preset opening degree adjustment step. ​According to the updated current electromagnetic valve opening degree, the electromagnetic valve is driven, and the step of obtaining the current sound intensity of the range extender is returned to be executed until the current sound intensity is less than or equal to the first preset intensity or the current electromagnetic valve opening degree is less than or equal to the preset minimum opening degree. The preset opening degree adjustment step is a preset adjustment step for adjusting the electromagnetic valve opening degree each time.

[0055] Wherein, the current electromagnetic valve opening degree is the opening degree of the current electromagnetic valve, used to adjust the channel size of the preset channel. The preset minimum opening degree is the minimum opening degree that the electromagnetic valve can provide.

[0056] Specifically, the current sound intensity of the range extender can be obtained through the sound collecting device on the range extender, or the sound in the cab can be obtained. According to the frequency analysis of the frequency of the range extender vibration, the sound intensity corresponding to the range extender is determined, that is, the current sound intensity of the range extender. Then, the current sound intensity is compared with the first preset intensity to determine whether the current sound intensity is greater than the first preset intensity. If the current sound intensity is greater than the first preset intensity, it means that after reducing the noise of the range extender, the noise of the range extender is still relatively large, and the electromagnetic valve opening degree needs to be adjusted. Therefore, the current electromagnetic valve opening degree is obtained first, and it is determined whether the current electromagnetic valve opening degree is greater than the preset minimum opening degree. If the current electromagnetic valve opening degree is greater than the preset minimum opening degree, it means that the electromagnetic valve opening degree can be reduced to reduce the noise. Therefore, the current electromagnetic valve opening degree is reduced by the preset opening degree adjustment step to update the current electromagnetic valve opening degree. According to the updated current electromagnetic valve opening degree, the electromagnetic valve is driven, and the step of obtaining the current sound intensity of the range extender is returned to be executed until the current sound intensity is less than or equal to the first preset intensity or the current electromagnetic valve opening degree is less than or equal to the preset minimum opening degree. If the current electromagnetic valve opening degree is less than or equal to the preset minimum opening degree, it means that the electromagnetic valve opening degree cannot be further reduced, and therefore the current state of the electromagnetic valve can be maintained.

[0057] It can be understood that in addition to adjusting the current electromagnetic valve opening degree in the direction of reduction, it can also be adjusted in the direction of increase. The current sound intensity is minimized as the target for adjustment in both directions. The above example is an example of adjusting the current electromagnetic valve opening degree in the direction of reduction.

[0058] Optionally, similar to using the electromagnetic actuator to reduce the noise of the range extender, before obtaining the current sound intensity of the range extender and determining whether the current sound intensity is greater than the first preset intensity, it further includes: Obtaining a cab sound signal, and determining a cab sound intensity according to the cab sound signal; In response to the cab sound intensity being greater than a second preset intensity, triggering the step of obtaining the current sound intensity of the range extender and determining whether the current sound intensity is greater than the first preset intensity; Wherein, the second preset intensity is greater than the first preset intensity.

[0059] On the basis of the above examples, after the electromagnetic actuator is controlled to stop, it can be determined that the electromagnetic actuator is faulty and cannot be self-repaired, and manual troubleshooting is required, so the driver and / or the vehicle service center need to be reminded, which can be specifically: Generating an electromagnetic actuator failure signal and sending the electromagnetic actuator failure signal to a target device.

[0060] The electromagnetic actuator failure signal is a signal for reminding that the electromagnetic actuator cannot be used. The target device can be a mobile device of a vehicle driver, a vehicle-mounted device of a vehicle, a management device of a vehicle service center, etc.

[0061] Specifically, due to the electromagnetic actuator fault and the inability to self-repair, the electromagnetic actuator failure signal is generated and sent to the target device to remind the driver or the vehicle service center that manual troubleshooting or replacement of the electromagnetic actuator is required. It can be understood that before handling the electromagnetic actuator fault, in the high-frequency state of the range extender, the preset passage controlled by the electromagnetic valve can still be used to adjust the flow resistance between the upper liquid chamber and the lower liquid chamber.

[0062] On the basis of the above examples, before obtaining the vehicle frame vibration signal and the crankshaft speed signal corresponding to each electromagnetic actuator, the range extender is first started, which can be specifically: Obtaining the vehicle battery power; In response to the vehicle battery power being less than a power threshold, the vehicle is controlled to start the range extender, and the step of obtaining the vehicle frame vibration signal and the crankshaft speed signal corresponding to each electromagnetic actuator is triggered.

[0063] The vehicle battery power is the remaining available power of the vehicle battery. The power threshold is a pre-set power value for triggering the start of the range extender.

[0064] Specifically, the vehicle battery power can be obtained through a battery management system, etc. If the vehicle battery power is less than the power threshold, the range extender needs to provide additional power, so the vehicle needs to be controlled to start the range extender. Starting the range extender will cause the vehicle frame to vibrate, so the step of obtaining the vehicle frame vibration signal and the crankshaft speed signal corresponding to each electromagnetic actuator is triggered.

[0065] As Figure 2As shown, for low-frequency noise, noise reduction can be performed by the decoupling membrane-inertial channel type hydraulic suspension 210 containing the rubber main spring 212. For high-frequency noise, the crankshaft speed signal of the range extender 211 is captured by the range extender speed sensor, and the periodic vibration signal is predicted after processing the vibration information collected by the acceleration sensor, and the reverse suppression signal is obtained in the reverse direction. The output reverse suppression signal is amplified by the power amplifier circuit, thereby suppressing the main vibration noise. By collecting the residual noise inside the cab with a microphone as feedback, the vibration amplitude of the corresponding reverse suppression signal of the electromagnetic actuator 220 is adjusted to solve the problem of residual noise flowing into the cab after the range extender 211 starts. Thus, the noise generated by the vibration of the range extender 211 is further reduced, and the controllable electromagnetic valve 216 can be installed in the decoupling membrane-inertial channel hydraulic suspension 210. When the electromagnetic actuator 220 fails, the flow resistance of the glycol in the high-frequency state can still be changed, solving the problem of fixed damping of the decoupling membrane 214 of the decoupling membrane-inertial channel type hydraulic suspension 210, fixed output damping, and system stiffness that cannot be adaptively adjusted. By increasing the opening size of the control electromagnetic valve 216, the hydraulic fluid conversion flow path is changed, the moving coil composed of the enameled coil 223 and the magnetic core 224 is improved, the enameled coil 223 is easily worn, the enameled coil 223 is broken, and the active noise reduction fails.

[0066] The method for reducing the noise of the range extender provided by the embodiments of the present application acquires the driving current value of the electromagnetic actuator, so as to determine whether the electromagnetic actuator fails by the driving current value. When the absolute value of the driving current value is less than the preset minimum current value or the absolute value of the driving current value is greater than the preset maximum current value, it is determined that the electromagnetic actuator fails, the electromagnetic actuator is controlled to stop, and the electromagnetic valve is driven to open, so as to open the preset channel between the upper liquid chamber and the lower liquid chamber, and the flow resistance of the liquid in the high-frequency state can still be changed, the noise under the high-frequency vibration is effectively reduced, the state detection of the electromagnetic actuator is realized, and the high-frequency noise is reduced by controlling the electromagnetic valve when the electromagnetic actuator fails.

[0067] Figure 4 is a principle block diagram of a device for reducing the noise of the range extender provided by the embodiments of the present application. As shown in the figure, Figure 4 The device in the dashed box is mainly composed of a main control unit, a power supply unit, a power amplifier unit, a communication unit, a current detection unit, and an electromagnetic valve driving unit.

[0068] When the device is running, the main control unit completes initialization, and when the vehicle battery power is lower than the set power threshold, the range extender is started. The main control unit obtains the frame vibration signal obtained by the acceleration sensor through the communication unit, obtains the current range extender crankshaft speed signal of the range extender through the CAN bus unit, obtains the periodic vibration frequency and vibration amplitude, and outputs the reverse suppression signal with the same frequency and opposite amplitude to the power amplifier unit through the communication unit after reversing the vibration signal by the main control unit. The power amplifier unit drives the electromagnetic actuator to adjust the vibration frequency of the decoupling film. At this time, the microphone unit confirms the cab sound intensity in the cab, and when the cab sound intensity is greater than the second preset intensity, the current sound intensity of the range extender is obtained, and it is judged whether the current sound intensity is greater than the first preset intensity. If yes, the current sound intensity is fed back to the main control unit, and the amplitude of the existing reverse suppression signal is further adjusted. In order to prevent the moving coil from being worn and broken during movement, the current detection unit detects the driving current output by the power amplifier unit. When the preset current minimum value I min ≤ absolute value of driving current value ≤ preset current maximum value I max , it indicates that the output is normal, and the program is normally executed. When the absolute value of the driving current value is less than I min or greater than I max , it indicates that the line of the electromagnetic actuator is open or short-circuited, the current detection unit can confirm the moving coil fault, and the fault signal is fed back to the main control unit. The main control unit stops driving the power amplifier unit. At the same time, the driving control electromagnetic valve opening unit drives the electromagnetic valve, so that the ethylene glycol fluid is forced to pass through the preset channel provided by the electromagnetic valve at high frequency. Because the channel size of the preset channel is smaller than that of the inertial channel, the system stiffness is significantly increased, the high-frequency vibration transmission is inhibited, and the problems of moving coil wear and short circuit or enameled wire breakdown during movement, leading to electromagnetic actuator failure and high-frequency characteristic reduction, can be solved.

[0069] Figure 5 is a structural schematic diagram of an electronic device provided by an embodiment of the present application. As shown in Figure 5 , the electronic device 500 includes one or more processors 501 and a memory 502.

[0070] The processor 501 can be a central processing unit (CPU) or other forms of processing units with data processing capability and / or instruction execution capability, and can control other components in the electronic device 500 to perform desired functions.

[0071] The memory 502 can include one or more computer program products that can include various forms of computer-readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory, for example, can include random access memory (RAM), and / or a cache, and / or the like. The non-volatile memory, for example, can include read-only memory (ROM), hard disk, flash memory, and / or the like. The computer-readable storage media can store one or more computer program instructions executable by the processor 501 to implement the method for reducing noise of the range extender of any embodiment of the present application and / or other desired functions. Various contents, such as initial extrinsic parameters, threshold values, and the like, can also be stored in the computer-readable storage media.

[0072] In one example, the electronic device 500 can further include an input device 503 and an output device 504, which are interconnected through a bus system and / or other forms of connection mechanisms (not shown). The input device 503 can include, for example, a keyboard, a mouse, and / or the like. The output device 504 can output various information, including pre-warning prompt information, braking force, and the like, to the outside. The output device 504 can include, for example, a display, a speaker, a printer, a communication network and a remote output device connected thereto, and / or the like.

[0073] Of course, in order to simplify, Figure 5 Only some of the components in the electronic device 500 related to the present application are shown in the figure, and components such as buses, input / output interfaces, and the like are omitted. In addition, the electronic device 500 can also include any other appropriate components according to specific application cases.

[0074] In addition to the above method and device, the embodiments of the present application can also be a computer program product including computer program instructions, which, when executed by a processor, cause the processor to perform the steps of the method for reducing noise of the range extender provided by any embodiment of the present application.

[0075] The computer program product can be written in any combination of one or more programming languages, including an object-oriented programming language, such as Java, C++, and / or the like, and conventional procedural programming languages, such as the "C" programming language, or the like. The program code can execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server.

[0076] In addition, an embodiment of the present application can also be a computer readable storage medium, having stored thereon computer program instructions which, when executed by a processor, enable the processor to carry out the steps of the method of reducing the noise of the range extender according to any of the embodiments of the present application.

[0077] The computer readable storage medium can be any combination of one or more computer readable medium(s). The computer readable medium can be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium can be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium include an electrical connection having one or more wires, a portable disc, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0078] It should be noted that the terms used in the present application are only for describing specific embodiments and are not intended to limit the scope of the present application. As shown in the specification and claims of the present application, unless the context clearly indicates otherwise, the terms "one", "a", "an", and / or "the" do not specifically refer to the singular, but can also include the plural. The terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method or device including the element.

[0079] It should also be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. Unless otherwise explicitly specified and limited, the terms "mount", "connect", "connect" and the like should be broadly understood, for example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or a communication between two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0080] The principles and implementation manners of the present application are described by using specific examples in the present article, and the above example descriptions are only used to help understand the method of the present application and its core idea. The above descriptions are only the preferred implementation manners of the present application. It should be noted that, due to the limited nature of the language expression, there are objectively infinite specific structures, and for ordinary skilled persons in the technical field, some improvements, refinements or changes can be made without departing from the principles of the present application, or the above technical features can be combined in an appropriate manner; these improvements, refinements, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, shall be regarded as the protection scope of the present application.

Claims

1. A method for reducing noise in a range extender, characterized in that, include: For each electromagnetic actuator, the chassis vibration signal and crankshaft speed signal corresponding to the electromagnetic actuator are acquired, and the reverse suppression signal is determined based on the chassis vibration signal and the crankshaft speed signal. The electromagnetic actuator is controlled according to the reverse suppression signal; Obtain the current sound intensity of the range extender and determine whether the current sound intensity is greater than a first preset intensity; In response to the current sound intensity being greater than the first preset intensity, the reverse suppression signal is updated, and the process returns to the step of controlling the electromagnetic actuator according to the reverse suppression signal.

2. The method according to claim 1, characterized in that, The step of updating the reverse suppression signal and returning to the step of controlling the electromagnetic actuator according to the reverse suppression signal in response to the current sound intensity being greater than the first preset intensity includes: In response to the current sound intensity being greater than the first preset intensity, it is determined whether the current amplitude adjustment range is greater than the preset minimum adjustment value; In response to the current amplitude adjustment being greater than the preset minimum adjustment value, the historical sound intensity of the range extender is obtained; In response to the historical sound intensity being greater than or equal to the current sound intensity, the reverse suppression signal is updated according to the current amplitude adjustment direction and the current amplitude adjustment magnitude, and the process returns to the step of controlling the electromagnetic actuator according to the reverse suppression signal. In response to the historical sound intensity being less than the current sound intensity, the opposite direction of the current amplitude adjustment direction is taken as the new current amplitude adjustment direction. Based on the current amplitude adjustment amplitude and the preset adjustment step size, the new current amplitude adjustment amplitude is determined. Based on the new current amplitude adjustment direction and the new current amplitude adjustment amplitude, the reverse suppression signal is updated, and the process returns to the step of controlling the electromagnetic actuator based on the reverse suppression signal.

3. The method according to claim 1, characterized in that, Before obtaining the current sound intensity of the range extender and determining whether the current sound intensity is greater than a first preset intensity, the method further includes: Acquire the cab sound signal, and determine the cab sound intensity based on the cab sound signal; In response to the fact that the sound intensity in the cab is greater than a second preset intensity, the step of obtaining the current sound intensity of the range extender and determining whether the current sound intensity is greater than a first preset intensity is triggered. Wherein, the second preset strength is greater than the first preset strength.

4. The method according to claim 1, characterized in that, The step of controlling the electromagnetic actuator according to the reverse suppression signal includes: The inverse suppression signal is processed by a power amplifier to obtain a power amplifier suppression signal; The electromagnetic actuator is driven according to the power amplifier suppression signal.

5. The method according to claim 1, characterized in that, Also includes: Obtain the drive current value corresponding to the electromagnetic actuator; In response to the absolute value of the driving current being less than a preset minimum current value, or the absolute value of the driving current being greater than a preset maximum current value, the electromagnetic actuator is controlled to stop, and the electromagnetic valve is driven to open, so as to open a preset channel between the upper liquid chamber and the lower liquid chamber. The preset channel and the inertial channel are arranged side by side. The solenoid valve is used to control the opening and closing of the preset channel. The size of the preset channel is smaller than that of the inertial channel.

6. The method according to claim 5, characterized in that, After the solenoid valve is opened, the following steps are also included: Obtain the current sound intensity of the range extender and determine whether the current sound intensity is greater than a first preset intensity; In response to the current sound intensity being greater than the first preset intensity, the current solenoid valve opening is obtained, and it is determined whether the current solenoid valve opening is greater than the preset minimum opening. In response to an opening greater than the preset minimum opening, the current solenoid valve opening is updated by adjusting the step size according to the preset opening. Based on the updated current solenoid valve opening, drive the solenoid valve and return to the step of obtaining the current sound intensity of the range extender until the current sound intensity is less than or equal to the first preset intensity or the current solenoid valve opening is less than or equal to the preset minimum opening.

7. The method according to claim 5, characterized in that, After the electromagnetic actuator is stopped, the method further includes: An electromagnetic actuator failure signal is generated and sent to the target device.

8. The method according to claim 1, characterized in that, Before acquiring the chassis vibration signal and crankshaft speed signal corresponding to each electromagnetic actuator, the method further includes: Get the vehicle battery level; In response to the vehicle battery charge being less than a charge threshold, the vehicle is controlled to start the range extender, and the step of acquiring the chassis vibration signal and crankshaft speed signal corresponding to each electromagnetic actuator is triggered.

9. An electronic device, characterized in that, The electronic device includes: Processor and memory; The processor executes the steps of the method for reducing range extender noise as described in any one of claims 1 to 8 by calling programs or instructions stored in the memory.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a program or instructions that cause a computer to perform the steps of the method for reducing range extender noise as described in any one of claims 1 to 8.

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