CN114112011A - Vibration detection system and method for electronic parking actuating mechanism - Google Patents
Vibration detection system and method for electronic parking actuating mechanism Download PDFInfo
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- 230000005540 biological transmission Effects 0.000 claims description 4
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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Abstract
The invention provides a vibration detection system of an electronic parking actuating mechanism and a detection method thereof, wherein the vibration detection system comprises a detection workbench, a sample piece to be detected, a servo motor simulation load, a sensor press-mounting device and a vibration sensor, the servo motor simulation load is arranged on the detection workbench and can lift up and down along the detection workbench, the sample piece to be detected is arranged at the upper end of the servo motor simulation load, the detection workbench is provided with a clamping device, and the sample piece to be detected is clamped above the detection workbench through the clamping device. According to the actual working principle of the electronic parking actuating mechanism, the effective vibration detection method which accords with the characteristics of the electronic parking actuating mechanism is formulated, the vibration can be rapidly detected, and the detection result is more accurate. And the simulation of the parking braking load is realized through the load torque change curve of the servo motor.
Description
Technical Field
The invention relates to the field of electronic parking actuating mechanisms, in particular to a vibration detection system of an electronic parking actuating mechanism and a detection method thereof.
Background
An electronic Parking Brake system (EPB) is a Brake mechanism which combines an electronic control mode and a mechanical transmission mode and is driven by a motor to realize Parking. Compare in traditional machinery manual brake, it has advantages such as compact structure, convenient, intelligent security of operation. With the development of automobile electromotion and intellectualization, the EPB has become a development trend of an automobile parking brake system, and is widely used in vehicles of all levels.
When the EPB works, a motor drives an actuating mechanism (MGU, motor gear unit) to push a brake piston to press a friction plate on a brake disc, so that parking brake is realized. The MGU is composed of a motor, gears and other transmission parts, and vibration and noise are inevitably generated in the working process. Poor parking vibration noise performance can greatly influence the vehicle using experience of customers. In order to avoid complaints and complaints of products with excessive noise at the user end, the vibration noise performance of the products must be detected when the products are off-line.
However, the existing vibration noise evaluation method of the electronic parking brake system is not suitable for the noisy environment of the production line, and the detection efficiency is low. Therefore, it is necessary to develop a method for rapidly detecting the vibration performance of the MGU suitable for the production of a noisy environment.
In the traditional method for detecting the vibration of the production line of parts such as the automobile gearbox, the gear, the bearing and the like, indexes such as a vibration acceleration peak value, a peak value factor, a kurtosis and the like are usually calculated, and the method is not suitable for an electronic parking executing mechanism comprising a motor and a gear unit and needs to develop detection indexes meeting practical experience.
In view of the above, the present inventors have devised a vibration detection system for an electronic parking actuator and a detection method thereof, in order to overcome the above technical problems.
Disclosure of Invention
The invention aims to overcome the defects that a vibration noise evaluation method of an electronic parking brake system in the prior art is not suitable for a noisy environment of a production line and is low in detection efficiency, and provides a vibration detection system of an electronic parking actuating mechanism and a detection method thereof.
The invention solves the technical problems through the following technical scheme:
the utility model provides an electron parking actuating mechanism's vibration detecting system, its characterized in that, vibration detecting system is including the testing workbench, the sample spare that awaits measuring, servo motor analog load, sensor pressure equipment device and vibration sensor, servo motor analog load installs on the testing workbench, and can follow the testing workbench oscilaltion, the sample spare that awaits measuring is installed servo motor analog load's upper end, be provided with clamping device on the testing workbench, through clamping device will the sample spare that awaits measuring presss from both sides tightly and is in the testing workbench top.
According to one embodiment of the invention, a mounting plate is arranged below the detection workbench, and the servo motor load is mounted on the mounting plate.
According to one embodiment of the invention, the detection workbench is provided with a mounting groove, and the mounting plate is mounted in the mounting groove.
According to one embodiment of the invention, the clamping device comprises at least two mounting bosses and at least two mounting bolts, the mounting bosses are respectively located at two sides of the mounting groove, the mounting bolts are respectively mounted on the upper end surfaces of the corresponding mounting bosses, and the sample piece to be tested is clamped through the mounting bolts.
According to one embodiment of the invention, the upper surface of the mounting boss is provided with a threaded hole, and the mounting bolt penetrates through the sample piece to be tested and is connected with the threaded hole on the mounting boss.
According to one embodiment of the invention, a buffer device is further arranged between the sensor press-fitting device and the vibration sensor, and the sensor press-fitting device, the vibration sensor and the buffer device are sequentially connected to form an integral structure.
According to one embodiment of the invention, the damping means is an injection moulded rubber ball.
The invention also provides a vibration detection method of the electronic parking actuating mechanism, which is characterized in that the vibration detection method adopts the vibration detection system of the electronic parking actuating mechanism, and the vibration detection method comprises the following steps:
S1installing a sample piece to be tested of the electronic parking on a detection workbench of the vibration detection system, and carrying out press mounting on the sample piece to be tested by adopting a sensor press mounting device and a vibration sensor;
S2controlling the sample piece to be tested to move, and simulating the clamping and releasing of a friction plate to a brake disc in the parking braking process;
S3collecting the step S through a data collector2Simulating vibration acceleration signals and servo motor torque signals of the total surface in the clamping process and the releasing process;
S4judging a torque signal of the servo motor, and intercepting a vibration acceleration signal of the sample piece to be tested in the process of simulating clamping and releasing;
S5calculating the effective value of the vibration acceleration in the simulated clamping process, judging whether a preset index value is met, and if not, judging that the vibration detection is unqualified; if yes, go to step S6；
S6Calculating the effective value of the vibration acceleration in the simulated release process, judging whether a preset index value is met, and if not, judging that the vibration detection is unqualified; and if so, judging that the vibration detection is qualified.
According to an embodiment of the invention, said step S1Further comprising: after the sample piece to be tested is located, a motor interface of the sample piece to be tested is connected with a controller electrifying device; and pressing the vibration sensor at a preset position on the surface of the shell of the sample piece to be detected, and pressing the vibration sensor on the surface of the sample piece to be detected through starting force.
According to an embodiment of the invention, said step S2The method specifically comprises the following steps: the transmission system of the sample piece to be tested is controlled to rotate forwards or reversely through power supply, the simulation load of the servo motor is connected with the output end of the sample piece to be tested, the change of the load torque of the servo motor is controlled, and the load change of the clamping and releasing process of the friction plate on the brake disc in the parking braking process is simulated.
According to an embodiment of the invention, said step S3The frequency of the data acquisition instrument was set to 10 kHz.
According to an embodiment of the invention, said step S4Then also comprises the following steps: calculating amplitude spectrum, adding Hanning window and setting frequency resolution of vibration acceleration signalSet to 1 Hz.
According to an embodiment of the invention, said step S5Calculating effective values of vibration acceleration in two frequency bands of 2200 Hz-2800 Hz and 2800 Hz-3600 Hz in the simulated clamping process; said step S6Calculating effective values of vibration acceleration in 2200 Hz-2800 Hz and 2800 Hz-3600 Hz in the releasing process.
The positive progress effects of the invention are as follows:
according to the vibration detection system and the detection method of the electronic parking actuating mechanism, an effective vibration detection method which accords with the characteristics of the electronic parking actuating mechanism is formulated according to the actual working principle of the electronic parking actuating mechanism, so that the vibration can be quickly detected, and the detection result is more accurate. And the simulation of the parking braking load is realized through the load torque change curve of the servo motor.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings in which like reference numerals denote like features throughout the several views, wherein:
fig. 1 is a schematic structural diagram of a vibration detection system of an electronic parking actuator according to the present invention.
Fig. 2 is a flowchart of a vibration detection method of an electronic parking actuator according to the present invention.
Fig. 3 is a schematic diagram illustrating a torque variation of a servo motor simulation load in the vibration detection method of the electronic parking actuator according to the present invention.
[ reference numerals ]
Servo motor dummy load 30
Sensor press-fitting device 40
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts.
Further, although the terms used in the present invention are selected from publicly known and used terms, some of the terms mentioned in the description of the present invention may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein.
Furthermore, it is required that the present invention is understood, not simply by the actual terms used but by the meaning of each term lying within.
Fig. 1 is a schematic structural diagram of a vibration detection system of an electronic parking actuator according to the present invention.
As shown in fig. 1, the invention discloses a vibration detection system of an electronic parking actuator, which comprises a detection workbench 10, a sample piece to be detected 20, a servo motor simulation load 30, a sensor press-fitting device 40 and a vibration sensor 50, wherein the servo motor simulation load 30 is installed on the detection workbench 10 and can lift up and down along the detection workbench 10, the sample piece to be detected 20 is installed at the upper end of the servo motor simulation load 30, the detection workbench 10 is provided with an installation boss 11, and the sample piece to be detected 20 is clamped above the detection workbench 10 through an installation bolt 13.
The detection workbench 10 is used for placing necessary accessories such as a sample assembly to be detected and a servo motor simulation load, and can be automatically connected with or separated from the spline of the output end of the sample to be detected by using the servo motor simulation load.
Preferably, a mounting plate (not shown) is provided below the inspection stage 10, and the servo motor dummy load 30 is mounted on the mounting plate. A mounting groove 12 is formed in the detection workbench 10, and the mounting plate is mounted in the mounting groove 12.
Preferably, in this embodiment, at least two mounting bosses 11 and at least two mounting bolts 13 are arranged on the detection workbench, the mounting bosses 11 are respectively located at two sides of the mounting groove 12, the mounting bolts 13 are respectively mounted on the upper end surfaces of the corresponding mounting bosses 11, and the sample piece 20 to be detected is clamped by the mounting bolts 13.
For example, a threaded hole is provided on the upper surface of the mounting boss 11, and the mounting bolt 13 is connected to the threaded hole of the mounting boss 11 through the sample through hole. The mounting bolts 13 may be used to mount the sample to be tested on the testing table, but may be replaced by an electric clamping device with similar function.
In addition, a buffer device 41 is further arranged between the sensor press-fitting device 40 and the vibration sensor 50, and the sensor press-fitting device 40, the vibration sensor 50 and the buffer device 41 are sequentially connected to form an integral structure. The damping means 41 is here preferably an injection-moulded rubber ball. The buffer device 41 is disposed between the vibration sensor 50 and the sensor press-fitting device 40 for buffering vibration energy to prevent the vibration sensor from being damaged by impact. The sensor press-fitting device 40 is connected with an air source, and presses the vibration sensor 50 on the sample piece 20 to be measured through pneumatic force. The vibration sensor 50 is preferably a single-axis vibration acceleration sensor, and is configured to collect a vibration acceleration time-domain signal during the operation of the sample to be measured.
Fig. 2 is a flowchart of a vibration detection method of an electronic parking actuator according to the present invention.
As shown in fig. 2, the invention further provides a vibration detection method for an electronic parking actuator, which adopts the vibration detection system for an electronic parking actuator, and the vibration detection method comprises the following steps:
S1mounting the sample to be tested for electronic parking on the test bench of the vibration testing system, e.g. using bolts or automatic clampingAnd (5) fixing. And (3) pressing the sample piece to be tested by adopting a sensor pressing device and a vibration sensor.
Preferably, the step S1Further comprising: after the sample piece to be tested is located, a motor interface of the sample piece to be tested is connected with a controller electrifying device; and pressing the vibration sensor at a preset position on the surface of the shell of the sample piece to be tested, and pressing the vibration sensor on the surface of the sample piece to be tested through aerodynamic force.
A buffer device, such as an elastic element, can be arranged between the vibration sensor and the sensor press-fitting device to prevent the vibration sensor from being damaged due to impact.
S2And controlling the sample piece to be tested to move, and simulating the clamping and releasing of the friction plate to the brake disc in the parking braking process.
Preferably, the step S2The method specifically comprises the following steps: the transmission system of the sample piece to be tested is controlled to rotate forwards or reversely through power supply, the simulation load of the servo motor is connected with the output end of the sample piece to be tested, the change of the load torque of the servo motor is controlled, and the load change of the clamping and releasing process of the friction plate on the brake disc in the parking braking process is simulated (as shown in figure 3).
S3Collecting the step S through a data collector2Simulating the vibration acceleration signal and the servo motor torque signal of the total surface during the clamping process and the releasing process.
Preferably, the step S3The frequency of the data acquisition instrument was set to 10 kHz.
S4And judging the torque signal of the servo motor, and intercepting a vibration acceleration signal of the sample piece to be tested in the process of simulating clamping and releasing.
Preferably, the step S4Then also comprises the following steps: and calculating an amplitude spectrum of the vibration acceleration signal, adding a Hanning window, and setting the frequency resolution as 1 Hz. Here, the hanning window refers to a window function, and the windowing function is a method of signal processing, and is mainly used for reducing the leakage of the vibration acceleration spectrum energy.
S5Calculating and simulating the vibration acceleration in the clamping processAn effective value RMS (root Mean square) and judging whether a preset index value is met, if not, judging that the vibration detection is unqualified; if yes, go to step S6。
Wherein, the step S5And calculating effective values of vibration acceleration in two frequency bands of 2200 Hz-2800 Hz and 2800 Hz-3600 Hz in the simulation clamping process.
S6Calculating a vibration acceleration effective value in the simulated release process, judging whether a preset index value RMS (root Mean square) is met, and if not, judging that the vibration detection is unqualified; and if so, judging that the vibration detection is qualified.
Wherein, the step S6Calculating effective values of vibration acceleration in 2200 Hz-2800 Hz and 2800 Hz-3600 Hz in the releasing process.
According to the description, the vibration detection system and the detection method of the electronic parking actuating mechanism provided by the invention design a system for rapidly detecting the vibration of the electronic parking actuating mechanism on a production line, an effective vibration detection method according with the characteristics of the electronic parking actuating mechanism is formulated according to the actual working principle of the electronic parking actuating mechanism, and a load torque change curve of a servo motor is also designed to simulate a parking braking load.
In summary, according to the vibration detection system and the detection method of the electronic parking actuator, an effective vibration detection method conforming to the characteristics of the electronic parking actuator is formulated according to the actual working principle of the electronic parking actuator, so that the vibration can be quickly detected, and the detection result is more accurate. And the simulation of the parking braking load is realized through the load torque change curve of the servo motor.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (13)
1. The utility model provides an electron parking actuating mechanism's vibration detecting system, its characterized in that, vibration detecting system is including the testing workbench, the appearance piece that awaits measuring, servo motor analog load, sensor pressure equipment device and vibration sensor, servo motor analog load installs on the testing workbench, and can follow the testing workbench oscilaltion, the appearance piece that awaits measuring is arranged the upper end of servo motor analog load, be provided with clamping device on the testing workbench, through clamping device will the appearance piece that awaits measuring presss from both sides tightly and is in the testing workbench top.
2. The vibration detecting system of an electric parking actuator according to claim 1, wherein a mounting plate is provided below the detection table, and the servo motor load is mounted on the mounting plate.
3. The vibration detecting system for an electric parking actuator according to claim 2, wherein the detecting table has a mounting recess formed therein, and the mounting plate is mounted in the mounting recess.
4. The vibration detection system of an electronic parking actuator according to claim 3, wherein the clamping device includes at least two mounting bosses and at least two mounting bolts, the mounting bosses are respectively located at two sides of the mounting groove, the mounting bolts are respectively mounted on the upper end surfaces of the corresponding mounting bosses, and the sample to be tested is clamped by the mounting bolts.
5. The vibration detection system of an electronic parking actuator according to claim 4, wherein a threaded hole is formed in an upper surface of the mounting boss, and the mounting bolt penetrates through a sample to be tested and is connected with the threaded hole in the mounting boss.
6. The vibration detecting system for the electronic parking actuator according to claim 1, wherein a buffering device is further disposed between the sensor press-fitting device and the vibration sensor, and the sensor press-fitting device, the vibration sensor and the buffering device are sequentially connected to form an integrated structure.
7. The vibration detecting system of an electric parking actuator according to claim 6, wherein the buffering means is an injection molded rubber ball.
8. A vibration detecting method of an electronic parking actuator, which employs the vibration detecting system of the electronic parking actuator according to any one of claims 1 to 7, the vibration detecting method comprising the steps of:
S1installing a sample piece to be tested of the electronic parking on a detection workbench of the vibration detection system, and carrying out press mounting on the sample piece to be tested by adopting a sensor press mounting device and a vibration sensor;
S2controlling the sample piece to be tested to move, and simulating the clamping and releasing of a friction plate to a brake disc in the parking braking process;
S3collecting the step S through a data collector2Simulating vibration acceleration signals and servo motor torque signals of the total surface in the clamping process and the releasing process;
S4judging a torque signal of the servo motor, and intercepting a vibration acceleration signal of the sample piece to be tested in the process of simulating clamping and releasing;
S5calculating the effective value of the vibration acceleration in the simulated clamping process, judging whether a preset index value is met, and if not, judging that the vibration detection is unqualified; if yes, go to step S6；
S6Calculating the effective value of the vibration acceleration in the simulated release process, judging whether a preset index value is met, and if not, judging that the vibration detection is unqualified; and if so, judging that the vibration detection is qualified.
9. As claimed in claim 8The vibration detection method of the electronic parking actuator is characterized in that the step S1Further comprising: after the sample piece to be tested is located, a motor interface of the sample piece to be tested is connected with a controller electrifying device; and pressing the vibration sensor at a preset position on the surface of the shell of the sample piece to be detected, and pressing the vibration sensor on the surface of the sample piece to be detected through starting force.
10. The vibration detecting method of an electronic parking actuator according to claim 8, wherein the step S2The method specifically comprises the following steps: the transmission system of the sample piece to be tested is controlled to rotate forwards or reversely through power supply, the simulation load of the servo motor is connected with the output end of the sample piece to be tested, the change of the load torque of the servo motor is controlled, and the load change of the clamping and releasing process of the friction plate on the brake disc in the parking braking process is simulated.
11. The vibration detecting method of an electronic parking actuator according to claim 8, wherein the step S3The frequency of the data acquisition instrument was set to 10 kHz.
12. The vibration detecting method of an electronic parking actuator according to claim 8, wherein the step S4Then also comprises the following steps: and calculating an amplitude spectrum of the vibration acceleration signal, adding a Hanning window, and setting the frequency resolution as 1 Hz.
13. The vibration detecting method of an electronic parking actuator according to claim 8, wherein the step S5Calculating effective values of vibration acceleration in two frequency bands of 2200 Hz-2800 Hz and 2800 Hz-3600 Hz in the simulated clamping process; said step S6Calculating effective values of vibration acceleration in 2200 Hz-2800 Hz and 2800 Hz-3600 Hz in the releasing process.
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| CN202111106697.7A CN114112011A (en) | 2021-09-22 | 2021-09-22 | Vibration detection system and method for electronic parking actuating mechanism |
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| CN202111106697.7A CN114112011A (en) | 2021-09-22 | 2021-09-22 | Vibration detection system and method for electronic parking actuating mechanism |
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| CN110907823A (en) * | 2019-11-04 | 2020-03-24 | 中国电子产品可靠性与环境试验研究所（（工业和信息化部电子第五研究所）（中国赛宝实验室）） | Real-time acquisition system and method for servo motor test data |
| CN112945572A (en) * | 2021-01-28 | 2021-06-11 | 成都辰启电子科技有限公司 | MGU braking noise detection device and control system |
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2021
- 2021-09-22 CN CN202111106697.7A patent/CN114112011A/en active Pending
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|---|---|---|---|---|
| KR101350192B1 (en) * | 2012-10-26 | 2014-01-09 | 기아자동차주식회사 | Control method of vehicle for test in braking force of electronic parking brake |
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