Vibration noise testing method, device and system of integrated brake control assembly

Abstract

The invention discloses a vibration noise test method, device and system for an integrated brake control assembly, and the method comprises the steps: fixedly installing the integrated brake control assembly on a test bench, and setting a noise test point and a vibration acceleration test point; the target rotating speed of the motor rotating speed of the integrated brake control assembly and the target pressure of the brake master cylinder pressure are set, and after the motor rotating speed is increased to the target rotating speed, the target rotating speed is kept till the brake master cylinder pressure reaches the target pressure; data information of a noise measuring point and a vibration acceleration measuring point in the process from the moment when the motor rotating speed reaches the target rotating speed to the moment when the brake master cylinder pressure reaches the target pressure is obtained; calculating a time domain total sound pressure level curve of the noise measuring point and time domain vibration acceleration curves of the vibration acceleration measuring point in three directions according to the data information; according to the method, the NVH level of the integrated brake control assembly can be effectively evaluated, a reference can be provided for the NVH performance design of the integrated brake control assembly through a rack method in the early stage of product development, and a powerful means is provided for brake system performance development control.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle testing, and in particular to a vibration and noise testing method, device and system for an integrated brake control assembly. Background Art

[0002] Traditional fuel vehicles use vacuum brake boosters to assist in building pressure in the brake system, and use ESC assemblies to control the braking force of each brake to achieve brake assist functions such as ABS. In recent years, with the development trend of automobile electrification, the control structure of the automobile braking system has also developed rapidly. The integrated brake control assembly has the advantages of large braking force, fast response and precise control. Since electric vehicles do not have engines to provide vacuum for vacuum brake boosters, electric vehicles now mostly use integrated brake control assemblies to assist vehicle braking and control braking force.

[0003] In the early stage of the development of the NVH performance of the integrated brake control assembly, due to the lack of vehicle resources, it is necessary to conduct bench tests on the integrated brake control assembly to evaluate the NVH performance of the integrated brake control assembly. Therefore, it is very important to develop a reasonable test method. Currently, most of the patent documents published on the integrated brake control assembly are studies on its various functions and control methods, and there is no patent that studies the test method of its bench state vibration and noise level. Unlike traditional vacuum brake boosters, the integrated brake control assembly uses a boost motor to drive the push rod of the brake master cylinder to assist the braking system. This causes vibration noise to be generated by the friction of the motor and the transmission mechanism during the assisting process. This vibration noise will seriously affect the NVH performance of the entire vehicle. If it is not properly controlled, it will be easily perceived by users and cause complaints. The above problems need to be solved urgently. Summary of the invention

[0004] The object of the present invention is to provide a vibration and noise testing method, device and system for an integrated brake control assembly to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a vibration and noise testing method for an integrated brake control assembly, comprising:

[0006] The integrated brake control assembly is fixedly installed on the test bench, and noise measurement points and vibration acceleration measurement points are set;

[0007] Setting a target speed of the motor speed of the integrated brake control assembly and a target pressure of the brake master cylinder pressure, and after the motor speed is accelerated to the target speed, maintaining the target speed until the brake master cylinder pressure reaches the target pressure;

[0008] Obtain data information of noise measurement points and vibration acceleration measurement points during the process from when the motor speed reaches the target speed to when the brake master cylinder pressure reaches the target pressure;

[0009] The time-domain total sound pressure level curve of the noise measurement point and the time-domain vibration acceleration curves in three directions of the vibration acceleration measurement point are calculated based on the data information.

[0010] Furthermore, the integrated brake control assembly is fixedly mounted on a test bench, and noise measurement points and vibration acceleration measurement points are set, and also includes:

[0011] Determine the center position of the integrated brake control assembly and the test bench fixed mounting point;

[0012] Set the detection distance between the center position and the noise measurement point, and the noise measurement point should not be lower than the plane where the center position is located.

[0013] Furthermore, the integrated brake control assembly is fixedly mounted on a test bench, and noise measurement points and vibration acceleration measurement points are set, and further includes:

[0014] The vibration acceleration measuring points include a body vibration acceleration measuring point and a motor housing vibration acceleration measuring point. The body vibration acceleration measuring point is arranged on the body housing surface of the integrated brake control assembly close to the transmission mechanism, and the motor housing vibration acceleration measuring point is arranged at the motor housing.

[0015] Furthermore, setting the target speed of the motor speed of the integrated brake control assembly and the target pressure of the brake master cylinder pressure also includes:

[0016] Set the initial rotation speed and set the initial speed to zero;

[0017] After the motor speed is accelerated to the target speed, the target speed is maintained until the brake master cylinder pressure reaches the target pressure, and then the motor speed is controlled to decelerate to the initial speed.

[0018] Furthermore, obtaining data information of noise measurement points and vibration acceleration measurement points during the process from when the motor speed reaches the target speed to when the brake master cylinder pressure reaches the target pressure also includes:

[0019] Anti-aliasing and high-pass filtering are used to eliminate aliasing and trend terms.

[0020] Furthermore, the total sound pressure level curve in the time domain of the noise measurement point and the vibration acceleration curve in the time domain of the vibration acceleration measurement point in three directions are calculated according to the data information, and also include:

[0021] Set the time interval value according to the test requirements;

[0022] The time domain is segmented according to the time interval value, the total sound pressure level of each segment is calculated, the total sound pressure level curve of the time domain is obtained, and the test frequency range and data overlap rate are determined;

[0023] The time domain is segmented according to the time interval value, the vibration acceleration value of each segment is calculated, the time domain vibration acceleration curves in three directions are obtained, and the test frequency range and data overlap rate are determined.

[0024] Furthermore, the time-domain total sound pressure level curve and the time-domain vibration acceleration curve are averaged on the time axis to obtain the average sound pressure level of the noise measurement point during the stable operation time of the motor and the average vibration acceleration in three directions of the vibration acceleration measurement point.

[0025] Furthermore, the NVH characteristics of the test bench of the integrated brake control assembly were evaluated based on the average sound pressure level and the average vibration acceleration.

[0026] On the other hand, a vibration and noise testing device for an integrated brake control assembly is provided, and a vibration and noise testing method for an integrated brake control assembly described in any one of the above items is applied, comprising:

[0027] The first setting module is used to set the noise measurement point and the vibration acceleration measurement point;

[0028] A second setting module is used to set a target speed of the motor speed of the integrated brake control assembly and a target pressure of the brake master cylinder pressure;

[0029] A control module, used for controlling the motor speed to accelerate to a target speed and then maintaining the target speed until the brake master cylinder pressure reaches a target pressure;

[0030] An acquisition module is used to obtain data information of noise measurement points and vibration acceleration measurement points during the process from when the motor speed reaches the target speed to when the brake master cylinder pressure reaches the target pressure;

[0031] The processing module is used to calculate the time-domain total sound pressure level curve of the noise measurement point and the time-domain vibration acceleration curves in three directions of the vibration acceleration measurement point according to the data information.

[0032] In another aspect, a vibration and noise testing system for an integrated brake control assembly is provided, and the vibration and noise testing method for an integrated brake control assembly described in any one of the above items is applied, comprising:

[0033] An integrated brake control assembly and a test bench, the test bench is provided with a mounting hole, the integrated brake control assembly is fixedly mounted on the test bench through the mounting hole, the integrated brake control assembly is provided with an oil outlet hole, and the brake caliper is connected to the oil outlet hole through a brake oil pipe;

[0034] Microphone: The microphone is set at the noise measurement point, the center position of the integrated brake control assembly and the test bench fixed installation point is determined, the detection distance between the center position and the noise measurement point is set, and the noise measurement point is not lower than the horizontal plane where the center position is located;

[0035] A vibration acceleration sensor, wherein the vibration acceleration sensor is arranged at a vibration acceleration measuring point, wherein the vibration acceleration measuring point includes a body vibration acceleration measuring point and a motor housing vibration acceleration measuring point, wherein the body vibration acceleration measuring point is arranged on the body housing surface of the integrated brake control assembly close to the transmission mechanism, and the motor housing vibration acceleration measuring point is arranged at the motor housing;

[0036] The host computer is connected to the microphone and the vibration acceleration sensor respectively, and collects data information at the noise measurement point and the vibration acceleration measurement point respectively through the microphone and the vibration acceleration sensor.

[0037] Compared with the prior art, the beneficial effects of the present invention are: the present invention can effectively evaluate the NVH level of the integrated brake control assembly, and can provide a reference for the NVH performance design of the integrated brake control assembly through the bench method in the early stage of product development, providing a powerful means for the performance development and control of the brake system. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a flow chart of a vibration and noise testing method for an integrated brake control assembly according to an embodiment of the present invention;

[0039] Figure 2 It is a connection block diagram of a vibration and noise testing device of an integrated brake control assembly in an embodiment of the present invention;

[0040] Figure 3 It is a front view and AA cross-sectional view of a test bench in an embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of the connection between the integrated brake control assembly and the test bench in an embodiment of the present invention;

[0042] Figure 5 It is a front view of the noise measurement point where the microphone is arranged in an embodiment of the present invention;

[0043] Figure 6 A top view of the noise measurement points where microphones are arranged in an embodiment of the present invention;

[0044] Figure 7 Schematic diagram of a vibration acceleration sensor arranged on the surface of the body housing and close to the transmission mechanism and a vibration acceleration sensor arranged on the motor housing in an embodiment of the present invention;

[0045] In the figure: 10, first setting module; 20, second setting module; 30, control module; 40, acquisition module; 50, processing module; 60, integrated brake control assembly; 70, test bench; 80, microphone; 90, vibration acceleration sensor; 61, oil outlet; 62, body shell; 63, motor shell; 71, mounting hole; 81, center position. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] Please refer to the attached drawings of the specification, the present invention provides a technical solution: a vibration and noise testing method of an integrated brake control assembly, comprising the following steps:

[0050] S102, the integrated brake control assembly is fixedly installed on the test bench, and noise measurement points and vibration acceleration measurement points are set;

[0051] Specifically, the center position of the integrated brake control assembly and the fixed installation point of the test bench is determined; the detection distance between the center position and the noise measurement point is set, and the noise measurement point is not lower than the plane where the center position is located.

[0052] Preferably, the detection distance between the center position and the noise measurement point is 0.5 meters, and 7 microphones are arranged on a hemisphere with a radius of 0.5 meters from the center position of the integrated brake control assembly installation point, pointing to the center of the installation point. The specific position is as follows: Figure 5 and 6 shown.

[0053] Specifically, the vibration acceleration measurement points include a body vibration acceleration measurement point and a motor housing vibration acceleration measurement point. The body vibration acceleration measurement point is set on the body housing surface of the integrated brake control assembly close to the transmission mechanism, and the motor housing vibration acceleration measurement point is set at the motor housing.

[0054] Among them, a vibration acceleration sensor is arranged on the surface of the integrated brake control assembly body shell near the transmission mechanism and the motor shell respectively, such as Figure 7 shown.

[0055] S104, setting a target speed of the motor speed of the integrated brake control assembly and a target pressure of the brake master cylinder, and after the motor speed is accelerated to the target speed, maintaining the target speed until the brake master cylinder pressure reaches the target pressure;

[0056] Specifically, an initial speed is set and the initial speed is set to zero; after the motor speed is accelerated to a target speed, the target speed is maintained until the brake master cylinder pressure reaches a target pressure, and then the motor speed is controlled to decelerate to the initial speed.

[0057] The upper computer drives the motor of the integrated brake control assembly to run, so that the motor speed is accelerated from zero to the target speed, and then the speed is maintained until the brake master cylinder pressure reaches the target pressure and then decelerates to zero.

[0058] S106, acquiring data information of noise measurement points and vibration acceleration measurement points during the process from when the motor speed reaches the target speed to when the brake master cylinder pressure reaches the target pressure;

[0059] Specifically, aliasing and trend terms are eliminated through anti-aliasing filtering and high-pass filtering.

[0060] The noise signal of the noise measuring point and the acceleration signal of the vibration acceleration measuring point are measured. The requirements of the target speed and the target pressure are shown in Table 1. Preferably, each working condition is measured three times.

[0061] Table 1 Test conditions

[0062] Serial number Target pressure Target speed 1 50 bar 100 rad / s 2 50 bar 200 rad / s 3 100 bar 100 rad / s 4 100 bar 200 rad / s

[0063] S108. Calculate the total sound pressure level curve in the time domain of the noise measurement point and the vibration acceleration curve in the time domain in three directions of the vibration acceleration measurement point according to the data information.

[0064] Among them, this step performs data processing and analysis, selects the data of the stable operation stage of the motor from the time when the motor speed reaches the target speed to the time when the brake master cylinder pressure reaches the target pressure for processing and analysis, and calculates the time-domain total sound pressure level curve of each noise measuring point in the test process and the time-domain vibration acceleration curves in three directions of each vibration acceleration measuring point.

[0065] Specifically, the time interval value is set according to the test requirements; the time domain is segmented according to the time interval value, the total sound pressure level of each segment is calculated, the time domain total sound pressure level curve is obtained, and the test frequency range and data overlap rate are determined; the time domain is segmented according to the time interval value, the vibration acceleration value of each segment is calculated, the time domain vibration acceleration curves in three directions are obtained, and the test frequency range and data overlap rate are determined.

[0066] Wherein, preferably, the time interval value is set to 0.02 seconds, then the time domain data is segmented according to the time interval of 0.02 seconds, and the total sound pressure level of each segment is calculated to obtain the time domain total sound pressure level curve, the unit is A-weighted sound pressure level: dB (A), the analysis frequency range is 20Hz ~ 20kHz, and the present embodiment preferably uses the Hanning window, and the data overlap rate is 50%;

[0067] Furthermore, the time domain data was segmented at time intervals of 0.02 seconds, and the vibration acceleration value of each segment was calculated to obtain the time domain vibration acceleration curves in three directions in units of m / s2; the analysis frequency range was 20Hz to 5kHz; the Hanning window was used; and the data overlap rate was 50%.

[0068] Specifically, the time-domain total sound pressure level curve and the time-domain vibration acceleration curve are averaged on the time axis to obtain the average sound pressure level of the noise measurement point during the stable operation time of the motor and the average vibration acceleration in three directions of the vibration acceleration measurement point.

[0069] Among them, this step is data output, the time domain total sound pressure level curve of each noise measurement point and the time domain vibration acceleration curve of each vibration acceleration measurement point in three directions are averaged on the time axis, the average sound pressure level of each measurement point during the stable operation time of the motor and the average vibration acceleration magnitude in three directions are obtained, and they are filled in Table 2;

[0070] Table 2 Test result record

[0071]

[0072]

[0073] Specifically, the NVH characteristics of the test bench of the integrated brake control assembly are evaluated based on the average sound pressure level and the average vibration acceleration.

[0074] The test bench NVH characteristics of the integrated brake control assembly were evaluated using the results in Table 2.

[0075] On the other hand, a vibration and noise testing device for an integrated brake control assembly is provided, and a vibration and noise testing method for an integrated brake control assembly described in any one of the above items is applied, comprising:

[0076] The first setting module 10 is used to set the noise measurement point and the vibration acceleration measurement point;

[0077] Among them, the integrated brake control assembly is fixedly installed on the test bench, and the position parameters of the noise measurement points and the vibration acceleration measurement points are set according to the test requirements; the integrated brake control assembly is fixedly installed on the test bench, and the noise measurement points and the vibration acceleration measurement points are set; the vibration acceleration measurement points include the body vibration acceleration measurement points and the motor housing vibration acceleration measurement points, the body vibration acceleration measurement points are set on the body housing surface of the integrated brake control assembly close to the transmission mechanism, and the motor housing vibration acceleration measurement points are set at the motor housing.

[0078] A second setting module 20 is used to set a target speed of the motor of the integrated brake control assembly and a target pressure of the brake master cylinder;

[0079] The control module 30 is used to control the motor speed to accelerate to the target speed and then maintain the target speed until the brake master cylinder pressure reaches the target pressure;

[0080] Among them, the initial speed is set and the initial speed is set to zero; after the motor speed is accelerated to the target speed, the target speed is maintained until the brake master cylinder pressure reaches the target pressure, and then the motor speed is controlled to decelerate to the initial speed.

[0081] The acquisition module 40 is used to obtain data information of noise measurement points and vibration acceleration measurement points during the process from when the motor speed reaches the target speed to when the brake master cylinder pressure reaches the target pressure;

[0082] Among them, the noise signal of the noise measurement point and the acceleration signal of the vibration acceleration measurement point are measured, and the aliasing and trend items are eliminated through anti-aliasing filtering and high-pass filtering.

[0083] The processing module 50 is used to calculate the time-domain total sound pressure level curve of the noise measurement point and the time-domain vibration acceleration curves in three directions of the vibration acceleration measurement point according to the data information.

[0084] Among them, the time interval value is set according to the test requirements; the time domain is segmented according to the time interval value, the total sound pressure level of each segment is calculated, the time domain total sound pressure level curve is obtained, and the test frequency range and data overlap rate are determined; the time domain is segmented according to the time interval value, the vibration acceleration value of each segment is calculated, the time domain vibration acceleration curves in three directions are obtained, and the test frequency range and data overlap rate are determined; the time domain total sound pressure level curve and the time domain vibration acceleration curve are averaged on the time axis to obtain the average sound pressure level of the noise measuring point during the stable operation time of the motor, and the average vibration acceleration in three directions of the vibration acceleration measuring point; the NVH characteristics of the test bench of the integrated brake control assembly are evaluated according to the average sound pressure level and the average vibration acceleration.

[0085] On the other hand, a vibration and noise testing system of an integrated brake control assembly is provided, and a vibration and noise testing method of an integrated brake control assembly described in any one of the above items is applied, comprising:

[0086] An integrated brake control assembly 60 and a test bench 70, wherein the test bench 70 is provided with a mounting hole 71, the integrated brake control assembly 60 is fixedly mounted on the test bench 70 through the mounting hole 71, the integrated brake control assembly 60 is provided with an oil outlet hole 61, and the brake caliper is connected to the oil outlet hole 61 through a brake oil pipe;

[0087] Specifically, the test bench is first built. An integrated brake control assembly test bench is built in a semi-anechoic chamber. The structure of the bench is as follows: Figure 3 As shown, the whole material of the test bench is steel plate, and its thickness d is 30 mm. A mounting hole 71 is opened on the steel plate to install the test sample of the integrated brake control assembly 60. The size and position of the opening are consistent with the size of the tested sample. In order to eliminate the reflection of noise from the ground and the test bench itself, it should be ensured that the installation center position of the test piece and the ground height h should be greater than 1 meter, the dimension a between the mounting hole and the upper end of the test bench is less than 0.1 meter, and the width b from the mounting hole to the side of the test bench is less than 0.1 meter.

[0088] Furthermore, the sample of the integrated brake control assembly 60 is installed by installing the integrated brake control assembly on the test bench through the mounting hole 71. In order to simulate the actual situation, the brake caliper is connected to the oil outlet 61 of the integrated brake control assembly through the brake oil pipe. No air should be present in the pipe. Figure 4 shown.

[0089] Microphone 80, the microphone 80 is set at the noise measuring points 1 to 7, the center position 81 of the fixed installation point of the integrated brake control assembly 60 and the test bench 70 is determined, and the detection distance between the center position 81 and the noise measuring point is set, and the noise measuring point is not lower than the horizontal plane 82 where the center position 81 is located;

[0090] Specifically, it is preferred to arrange 7 microphones on a hemisphere with a radius of 0.5 meters from the center of the integrated brake control assembly installation point, with the direction pointing to the center of the installation point. Figure 5 and 6 shown.

[0091] A vibration acceleration sensor 90, which is arranged at a vibration acceleration measuring point. The vibration acceleration measuring point includes a body vibration acceleration measuring point and a motor housing vibration acceleration measuring point. The body vibration acceleration measuring point is arranged on the surface of the body housing 62 of the integrated brake control assembly near the transmission mechanism, and the motor housing vibration acceleration measuring point is arranged at the motor housing 63;

[0092] Specifically, the vibration acceleration sensor 90 is arranged at a surface of the integrated brake control assembly body housing 62 close to the transmission mechanism and at the motor housing 63, respectively. Figure 7 shown.

[0093] The host computer is connected to the microphone 80 and the vibration acceleration sensor 90 respectively, and collects data information at the noise measurement point and the vibration acceleration measurement point respectively through the microphone 80 and the vibration acceleration sensor 90, and uses a computer to drive the integrated brake control assembly motor to operate.

[0094] Among them, the host computer is preferably a computer, and the microphone and the vibration acceleration sensor are connected to the data acquisition device through a data cable. The data acquisition system of the data acquisition device should use anti-aliasing filtering and high-pass filtering to eliminate the influence of aliasing and trend items. The data acquisition system should have a data sampling capability of at least 20kHz, wherein the data acquisition system is installed on the host computer.

[0095] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vibration and noise testing method for an integrated brake control assembly, characterized in that: include: The integrated brake control assembly is fixedly installed on the test bench, and noise measurement points and vibration acceleration measurement points are set; Setting a target speed of the motor speed of the integrated brake control assembly and a target pressure of the brake master cylinder pressure, and after the motor speed is accelerated to the target speed, maintaining the target speed until the brake master cylinder pressure reaches the target pressure; Obtain data information of noise measurement points and vibration acceleration measurement points during the process from when the motor speed reaches the target speed to when the brake master cylinder pressure reaches the target pressure; The time-domain total sound pressure level curve of the noise measurement point and the time-domain vibration acceleration curves in three directions of the vibration acceleration measurement point are calculated based on the data information.

2. The vibration and noise testing method of an integrated brake control assembly according to claim 1, characterized in that: The integrated brake control assembly is fixedly installed on the test bench, and noise measurement points and vibration acceleration measurement points are set, including: Determine the center position of the integrated brake control assembly and the test bench fixed mounting point; Set the detection distance between the center position and the noise measurement point, and the noise measurement point should not be lower than the plane where the center position is located.

3. The vibration and noise testing method of an integrated brake control assembly according to claim 1, characterized in that: The integrated brake control assembly is fixedly installed on the test bench, and noise measurement points and vibration acceleration measurement points are set, including: The vibration acceleration measuring points include a body vibration acceleration measuring point and a motor housing vibration acceleration measuring point. The body vibration acceleration measuring point is arranged on the body housing surface of the integrated brake control assembly close to the transmission mechanism, and the motor housing vibration acceleration measuring point is arranged at the motor housing.

4. The vibration and noise testing method of an integrated brake control assembly according to claim 1, characterized in that: Setting the target speed of the integrated brake control assembly motor speed and the target pressure of the brake master cylinder pressure also includes: Set the initial rotation speed and set the initial speed to zero; After the motor speed is accelerated to the target speed, the target speed is maintained until the brake master cylinder pressure reaches the target pressure, and then the motor speed is controlled to decelerate to the initial speed.

5. The vibration and noise testing method of an integrated brake control assembly according to claim 1, characterized in that: The data information of the noise measurement point and the vibration acceleration measurement point during the process from when the motor speed reaches the target speed to when the brake master cylinder pressure reaches the target pressure is obtained, and also includes: Anti-aliasing and high-pass filtering are used to eliminate aliasing and trend terms.

6. The vibration and noise testing method of an integrated brake control assembly according to claim 1, characterized in that: The total sound pressure level curve in the time domain of the noise measurement point and the time domain vibration acceleration curve in three directions of the vibration acceleration measurement point are calculated based on the data information, including: Set the time interval value according to the test requirements; The time domain is segmented according to the time interval value, the total sound pressure level of each segment is calculated, the total sound pressure level curve of the time domain is obtained, and the test frequency range and data overlap rate are determined; The time domain is segmented according to the time interval value, the vibration acceleration value of each segment is calculated, the time domain vibration acceleration curves in three directions are obtained, and the test frequency range and data overlap rate are determined.

7. The vibration and noise testing method of an integrated brake control assembly according to claim 6, characterized in that: include: The time-domain total sound pressure level curve and the time-domain vibration acceleration curve are averaged on the time axis to obtain the average sound pressure level of the noise measurement point during the stable operation time of the motor and the average vibration acceleration in three directions of the vibration acceleration measurement point.

8. The vibration and noise testing method of an integrated brake control assembly according to claim 7, characterized in that: The NVH characteristics of the test bench of the integrated brake control assembly are evaluated based on the average sound pressure level and average vibration acceleration.

9. A vibration and noise testing device for an integrated brake control assembly, using a vibration and noise testing method for an integrated brake control assembly as claimed in any one of claims 1 to 8, characterized in that: include: The first setting module is used to set the noise measurement point and the vibration acceleration measurement point; A second setting module is used to set a target speed of the motor speed of the integrated brake control assembly and a target pressure of the brake master cylinder pressure; A control module, used for controlling the motor speed to accelerate to a target speed and then maintaining the target speed until the brake master cylinder pressure reaches a target pressure; An acquisition module is used to obtain data information of noise measurement points and vibration acceleration measurement points during the process from when the motor speed reaches the target speed to when the brake master cylinder pressure reaches the target pressure; The processing module is used to calculate the time-domain total sound pressure level curve of the noise measurement point and the time-domain vibration acceleration curves in three directions of the vibration acceleration measurement point according to the data information.

10. A vibration and noise testing system for an integrated brake control assembly, using a vibration and noise testing method for an integrated brake control assembly as claimed in any one of claims 1 to 8, characterized in that: include: An integrated brake control assembly and a test bench, the test bench is provided with a mounting hole, the integrated brake control assembly is fixedly mounted on the test bench through the mounting hole, the integrated brake control assembly is provided with an oil outlet hole, and the brake caliper is connected to the oil outlet hole through a brake oil pipe; Microphone: The microphone is set at the noise measurement point, the center position of the integrated brake control assembly and the test bench fixed installation point is determined, the detection distance between the center position and the noise measurement point is set, and the noise measurement point is not lower than the horizontal plane where the center position is located; A vibration acceleration sensor, wherein the vibration acceleration sensor is arranged at a vibration acceleration measuring point, wherein the vibration acceleration measuring point includes a body vibration acceleration measuring point and a motor housing vibration acceleration measuring point, wherein the body vibration acceleration measuring point is arranged on the body housing surface of the integrated brake control assembly close to the transmission mechanism, and the motor housing vibration acceleration measuring point is arranged at the motor housing; The host computer is connected to the microphone and the vibration acceleration sensor respectively, and collects data information at the noise measurement point and the vibration acceleration measurement point respectively through the microphone and the vibration acceleration sensor.

Images