A seat assembly road simulation working condition abnormal sound test device and method

Abstract

The application provides a seat assembly road simulation working condition abnormal sound test device and method, first confirms the seat assembly, checks the test sample, installs the test bench, arranges the vibration sensor and the sound sensor, collects the road spectrum data of the seat assembly in the whole vehicle state, inputs the road spectrum database, iteratively processes the road spectrum, obtains the control signal for the seat assembly abnormal sound bench test, carries out the road spectrum simulation test, records the abnormal sound problem, analyzes the problem, organizes and outputs the analysis result, forms the seat assembly abnormal sound evaluation analysis report, and realizes the seat assembly abnormal sound vibration test. Since various road vibration conditions can be simulated and repeated, the convenience and accuracy of the seat assembly abnormal sound problem analysis are improved.

Description

Technical Field

[0001] This invention belongs to the field of automotive design and development technology, specifically relating to a test device and method for abnormal noise of a seat assembly under simulated road conditions. Background Technology

[0002] With the development of the automotive industry, the level of intelligence in automobiles is increasing. Currently, abnormal noises are a significant factor affecting the overall NVH performance of a vehicle. According to quality issue feedback from JD Power and IQS, customer complaints about abnormal noises rank among the top two of all complaints, increasingly attracting the attention of automakers. Market complaints about abnormal noises are categorized by assembly, and the seat assembly is one of the main components where abnormal noises occur. Therefore, bench testing of seat assembly components for abnormal noises has become crucial. Summary of the Invention

[0003] To address the aforementioned issues, this invention proposes a test device and method for abnormal noise in seat assemblies under simulated road conditions. By collecting various road vibration spectra of the seat assembly to form a database, and inputting the spectra data into a test bench, the forced vibration of the seat during vehicle driving is reproduced during assembly testing. This allows for the identification and reproduction of abnormal noise problems, enabling the control of abnormal noise performance of the seat assembly in the early stages of development.

[0004] This invention is achieved through the following technical solution:

[0005] A test device for abnormal noise of seat assembly under simulated road conditions:

[0006] The test apparatus includes an electromagnetic vibration system 1, a test platform 2, a seat assembly fixture connection device 3, a seat assembly 4, a vibration sensor No. 1, a vibration sensor No. 2, and six sound sensors;

[0007] The electromagnetic excitation system 1 is used to electromagnetically excite the test bench 2, and the seat assembly 4 is installed on the test bench 2 through the seat assembly clamping connection device 3.

[0008] The seat assembly 4 is the front driver and passenger seat assembly;

[0009] The vibration sensor No. 1 is installed at sensor No. 1 arrangement position 5;

[0010] The vibration sensor No. 2 is installed at sensor No. 2 arrangement position 6;

[0011] The six sound sensors are respectively located at the seat cushion noise evaluation position 7, backrest noise evaluation position 8, and headrest noise evaluation position 9 of the driver and passenger seats.

[0012] Furthermore, the No. 1 vibration sensor and the No. 2 vibration sensor are used for road condition simulation;

[0013] The vibration sensor No. 1 is a triaxial sensor, with vibration directions along the X-axis, Y-axis, and Z-axis.

[0014] The sensor No. 1 is positioned at the rear end of the left guide rail of the driver's seat at position 5.

[0015] The vibration sensor No. 2 is a unidirectional sensor, and the vibration direction is the Z-axis direction.

[0016] The second sensor is positioned at position 6, which is at the very front of the right-side guide rail of the passenger seat.

[0017] A test method for abnormal noise of seat assembly under simulated road conditions:

[0018] The method specifically includes the following steps:

[0019] Step 1: Confirm seat assembly 4. The seat assembly 4 is the same as the front driver and passenger seats in the vehicle state. Prepare to start the abnormal noise test.

[0020] Step 2: Inspect the test specimen to ensure its structure and function are intact;

[0021] Step 3: Install the test bench and mount the seat assembly 4 onto the test bench surface 2 via the seat assembly clamping connection device 3;

[0022] Step 4: Arrange vibration sensors and sound sensors. Place vibration sensors at sensor position 5 (1) and sensor position 6 (2) on test bench 2. Ensure that the vibration of the test bench is similar to the vibration of the whole vehicle through vibration fitting and that the error is less than 5%. Place sound sensors at seat cushion noise evaluation position 7 (driver and passenger seats), backrest noise evaluation position 8 (backrest), and headrest noise evaluation position 9 (headrest).

[0023] Step 5: Collect road spectrum data of the seat assembly in the whole vehicle state. The vibration sensor placement position in the whole vehicle state is the same as that in Step 4. Collect vibration data of different road surfaces in the whole vehicle state.

[0024] Step 6: Input the road spectrum database. Input the vibration data of different vehicle speeds and different types of road surfaces collected in Step 5 into the road spectrum database.

[0025] Step 7, road spectrum iterative processing: Input the road spectrum data in the database of Step 6 into the seat bench test operating system to obtain the target signal for the seat assembly abnormal noise bench test. Based on the target signal, the test bench is excited by the electromagnetic excitation system 1 and the error is calculated. Through iterative processing, the vibration road spectrum simulation of the seat assembly is realized to obtain the control signal for the seat assembly abnormal noise bench test.

[0026] Step 8, Road spectrum simulation test: Use the control signal obtained in Step 7 to excite the test bench to simulate the seat vibration when the vehicle is driving on different types of road surfaces, and evaluate the seat noise performance; Step 9, Noise problem recording: Record and score the noise problems found in Step 8.

[0027] Step 10, Problem Analysis: Analyze the causes of the abnormal noise issues recorded in Step 9;

[0028] Step 11, Results Output: The analysis results from Step 10 are compiled and output to form a seat assembly noise evaluation and analysis report. Further, in Step 5,

[0029] In the early stages of development, when there are no test vehicles available, vibration data can be collected from the seat fixing points of benchmark vehicles or platform vehicles.

[0030] The different types of road surfaces include bumpy surfaces, such as cobblestone roads, Belgian roads, and rough cement roads.

[0031] Furthermore, in step 7,

[0032] The target signal is of interest in the frequency range of 5–100 Hz;

[0033] The final vibration signal obtained from the test bench acquisition point has an error of less than 5% compared to the target signal.

[0034] Furthermore, in step 9,

[0035] The abnormal noise problem includes information such as the location of the abnormal noise, the phenomenon, the operating conditions in which it occurs, and the degree of perception of the abnormal noise.

[0036] Further, in step 10,

[0037] The abnormal noise problem is divided into parts manufacturing problems, assembly problems, and design defects. For complex problems, repeated road simulation tests are conducted to pinpoint the true cause of the abnormal noise.

[0038] An electronic device includes a memory and a processor, the memory storing a computer program, the processor executing the computer program to implement the steps of the above method.

[0039] A computer-readable storage medium for storing computer instructions that, when executed by a processor, implement the steps of the above-described method.

[0040] A vehicle, characterized in that it comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the steps of the above method.

[0041] Beneficial effects of the invention

[0042] This invention focuses on the control of abnormal noise performance of seat assembly on a test bench. It collects various road vibration spectra of the seat assembly to form a database, and inputs the road spectrum data into the test bench to reproduce the forced vibration of the seat during vehicle driving during assembly testing. This allows for the identification and reproduction of abnormal noise problems, enabling the control of abnormal noise performance of the seat assembly in the early stages of development.

[0043] This invention enables seat assembly noise and vibration testing. Because it can simulate various road vibration conditions and repeat playback, it improves the convenience and accuracy of seat assembly noise problem analysis and enhances the user's driving experience. Attached Figure Description

[0044] Figure 1 This is a flowchart of the present invention;

[0045] Figure 2 This is a schematic diagram of the bench test of the seat assembly of the present invention; wherein 1 is the electromagnetic excitation system, 2 is the test bench, 3 is the seat assembly fixture connection device, 4 is the seat assembly, 5 is the arrangement position of sensor No. 1, 6 is the arrangement position of sensor No. 2, 7 is the seat cushion abnormal noise evaluation position, 8 is the backrest abnormal noise evaluation position, and 9 is the headrest abnormal noise evaluation position.

[0046] Figure 3 The internal communication structure of this invention is shown in the figure, wherein 401 is a memory, 402 is a processor, and 403 is a communication interface. Detailed Implementation

[0047] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0048] Combination Figures 1 to 3 .

[0049] A test device for abnormal noise of seat assembly under simulated road conditions:

[0050] The test apparatus includes an electromagnetic vibration system 1, a test platform 2, a seat assembly fixture connection device 3, a seat assembly 4, a vibration sensor No. 1, a vibration sensor No. 2, and six sound sensors;

[0051] The electromagnetic excitation system 1 is used to electromagnetically excite the test bench 2, and the seat assembly 4 is installed on the test bench 2 through the seat assembly clamping connection device 3.

[0052] The seat assembly 4 is the front driver and passenger seat assembly;

[0053] The vibration sensor No. 1 is installed at sensor No. 1 arrangement position 5;

[0054] The vibration sensor No. 2 is installed at sensor No. 2 arrangement position 6;

[0055] The six sound sensors are respectively located at the seat cushion noise evaluation position 7, backrest noise evaluation position 8, and headrest noise evaluation position 9 of the driver and passenger seats.

[0056] Vibration sensor No. 1 and vibration sensor No. 2 are used for road condition simulation;

[0057] The vibration sensor No. 1 is a triaxial sensor, with vibration directions along the X-axis, Y-axis, and Z-axis.

[0058] The sensor No. 1 is positioned at the rear end of the left guide rail of the driver's seat at position 5.

[0059] The vibration sensor No. 2 is a unidirectional sensor, and the vibration direction is the Z-axis direction.

[0060] The second sensor is positioned at position 6, which is at the very front of the right-side guide rail of the passenger seat.

[0061] A test method for abnormal noise of seat assembly under simulated road conditions:

[0062] The method specifically includes the following steps:

[0063] Step 1: Confirm seat assembly 4, identify the seat assembly that needs to be bench tested. The seat assembly 4 is the same as the front driver and passenger seats in the vehicle state. Prepare to start the abnormal noise test.

[0064] Step 2: Inspect the test specimen to ensure that its structure and function are intact and meet the requirements for abnormal noise evaluation.

[0065] Step 3: Install the test bench and mount the seat assembly 4 onto the test bench surface 2 via the seat assembly clamping connection device 3;

[0066] Step 4: Deploy vibration and sound sensors. Vibration sensors are placed at sensor positions 5 (1) and 6 (2) on test bench surface 2. These vibration sensors are used for iterative simulation of road conditions. Vibration fitting ensures that the vibration of the test bench approximates the vibration of the entire vehicle, with an error of less than 5%. Sound sensors are placed at sensor positions 7 (seat cushion noise evaluation point), 8 (backrest noise evaluation point), and 9 (headrest noise evaluation point). The sensor positions and orientations are as follows: Figure 2 As shown in Table 1, the purpose of each channel is as follows.

[0067]

[0068] Table 1 Sensor Layout Information

[0069] Step 5: Collect road spectrum data of the seat assembly in the whole vehicle state. The vibration sensor placement position in the whole vehicle state is the same as that in Step 4. Collect vibration data of different road surfaces in the whole vehicle state.

[0070] Step 6: Road spectrum database entry. The vibration data of different types of road surfaces collected in Step 5 are entered into the road spectrum database. This data can be used in this test and also in subsequent seat noise tests of the same vehicle model.

[0071] Step 7, road spectrum iterative processing: Input the road spectrum data in the database of Step 6 into the seat bench test operating system, obtain the target signal for the seat assembly abnormal noise bench test through signal extraction, filtering and peak processing, excite the test bench through electromagnetic excitation system 1 according to the target signal, calculate the error, realize the seat assembly vibration road spectrum simulation iteration through iterative processing, and obtain the control signal for the seat assembly abnormal noise bench test;

[0072] Step 8, Road Spectrum Simulation Test: Using the control signal obtained in Step 7 for the seat assembly noise test bench, the test bench is excited to simulate seat vibration under different types of road surfaces, and the seat noise performance is evaluated; evaluation locations are as follows... Figure 2 As shown.

[0073] Step 9: Record abnormal noise issues. Record and score the abnormal noise issues found in Step 8.

[0074] Step 10, Problem Analysis: Analyze the causes of the abnormal noise issues recorded in Step 9;

[0075] Step 11: Output Results. Organize and output the analysis results from Step 10 to form a seat assembly noise evaluation and analysis report. This supports the control of seat assembly noise performance in the early stages of development.

[0076] In step 5,

[0077] In the early stages of development, when there are no test vehicles available, vibration data can be collected from the seat fixing points of benchmark vehicles or platform vehicles.

[0078] The different types of road surfaces include bumpy roads, such as cobblestone roads, Belgian roads, and rough cement roads.

[0079] In step 7,

[0080] The target signal is of interest in the frequency range of 5–100 Hz;

[0081] The final vibration signal obtained from the test bench acquisition point has an error of less than 5% compared to the target signal.

[0082] In step 9,

[0083] The abnormal noise problem includes information such as the location of the abnormal noise, the phenomenon, the operating conditions in which it occurs, and the degree of perception of the abnormal noise.

[0084] The evaluators primarily focused on abnormal noises from the seat cushion, backrest, and headrest. The evaluation locations were as follows: Figure 2 As shown in Table 2, the scoring criteria for abnormal noise are as follows. The subjective scoring adopts a 10-point scoring method. Since it does not involve functional and safety issues, the score for the most serious abnormal noise problem is set at 4 points. A subjective evaluation of 7 points or above indicates that the level of abnormal noise of the component or assembly is acceptable.

[0085] Score Severity of abnormal noise Subjective evaluation and feelings 4 The extremely loud, abnormal noise is noticeable to all customers and causes extreme discomfort. All users will complain or lodge complaints. 5 A severe abnormal noise that can be felt by all customers and causes discomfort. It easily leads to complaints 6 The slight noise is only noticeable to discerning users. Difficult customers will complain 7 The slight noise is only noticeable when listened to attentively by discerning or professional users. There is a need for improvement, and discerning users may complain. 8 The unusual noise is almost inaudible; even discerning or professional users will find it difficult to detect. Discerning users shouldn't complain. 9 Almost no sound Even the most discerning users won't complain. 10 Flawless, outstanding very good

[0086] Table 2 Subjective Scoring Rules for Assembly Noises

[0087] In step 10,

[0088] The abnormal noise problem is divided into parts manufacturing problems, assembly problems, and design defects. For complex problems, repeated road simulation tests are conducted to pinpoint the true cause of the abnormal noise.

[0089] An electronic device includes a memory and a processor, the memory storing a computer program, the processor executing the computer program to implement the steps of the above method.

[0090] A computer-readable storage medium for storing computer instructions that, when executed by a processor, implement the steps of the above-described method.

[0091] A vehicle, characterized in that it comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the steps of the above method.

[0092] The vehicles also include:

[0093] Communication interface 403 is used for communication between memory 401 and processor 402.

[0094] The memory 401 is used to store computer programs that can run on the processor 402.

[0095] Memory 401 may include high-speed RAM memory, and may also include non-volatile memory, such as at least one disk storage.

[0096] If the memory 401, processor 402, and communication interface 403 are implemented independently, then the communication interface 403, memory 401, and processor 402 can be interconnected via a bus to complete communication between them. The bus can be an Industry Standard Architecture (ISA bus), a Peripheral Component Interconnect (PCI bus), or an Extended Industry Standard Architecture (EISA bus), etc. Buses can be categorized as address buses, data buses, control buses, etc. For ease of representation, Figure 3 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0097] Optionally, in a specific implementation, if the memory 401, processor 402, and communication interface 403 are integrated on a single chip, then the memory 401, processor 402, and communication interface 403 can communicate with each other through an internal interface.

[0098] Processor 402 may be a Central Processing Unit, or simply a CPU, or an Application Specific Integrated Circuit, or simply an ASIC, or one or more integrated circuits configured to implement the embodiments of this application.

[0099] The above provides a detailed description of the abnormal noise test method for a seat assembly under simulated road conditions proposed in this invention, and elucidates the principle and implementation method of this invention. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this invention. At the same time, for those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this invention. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A test method for a seat assembly road simulation abnormal noise test device, characterized in that: the test device comprises an electromagnetic excitation system (1), a test bed (2), a seat assembly clamp connection device (3), a seat assembly (4), a No. 1 vibration sensor, a No. 2 vibration sensor and six sound sensors; the electromagnetic excitation system (1) is used for electromagnetic excitation of the test bed (2), and the seat assembly (4) is installed on the test bed (2) through the seat assembly clamp connection device (3); the seat assembly (4) is a front row of main and auxiliary driver's seat assembly; the No. 1 vibration sensor is installed at a No. 1 sensor arrangement position (5); the No. 2 vibration sensor is installed at a No. 2 sensor arrangement position (6); the six sound sensors are arranged at seat cushion abnormal noise evaluation positions (7), backrest abnormal noise evaluation positions (8) and headrest abnormal noise evaluation positions (9) of the main and auxiliary driver's seats respectively; the method specifically comprises the following steps: Step 1, confirming the seat assembly (4), which is the same as the front row of main and auxiliary driver's seats in the whole vehicle state, and preparing to start the abnormal noise test; Step 2, checking the test sample, checking the structure and function of the test sample; Step 3, installing the test bed, installing the seat assembly (4) on the test bed (2) through the seat assembly clamp connection device (3); Step 4, arranging the vibration sensor and the sound sensor, arranging the vibration sensor at the No. 1 sensor arrangement position (5) and the No. 2 sensor arrangement position (6) of the test bed (2), ensuring that the vibration amplitude error between the test bed vibration and the whole vehicle vibration is less than 5% through vibration fitting, and arranging the sound sensor at the seat cushion abnormal noise evaluation positions (7), the backrest abnormal noise evaluation positions (8) and the headrest abnormal noise evaluation positions (9) of the main and auxiliary driver's seats; Step 5, collecting road spectrum data of the seat assembly in the whole vehicle state, the vibration sensor arrangement position in the whole vehicle state is the same as that in Step 4, and vibration data of different roads in the whole vehicle state is collected; Step 6, inputting the vibration data of different kinds of roads collected in Step 5 into a road spectrum database; Step 7, road spectrum iterative processing, inputting the road spectrum data in the database in Step 6 into a seat bench test operation system to obtain a target signal for the seat assembly abnormal noise bench test, exciting the test bed through the electromagnetic excitation system (1) according to the target signal, calculating the error, and realizing seat assembly vibration road spectrum simulation iteration through iterative processing to obtain a control signal for the seat assembly abnormal noise bench test; Step 8, road spectrum simulation test, exciting the test bed using the control signal for the seat assembly abnormal noise bench test obtained in Step 7 to simulate the seat vibration when the vehicle runs on different kinds of roads and evaluate the seat abnormal noise performance; Step 9, abnormal noise problem recording, recording and evaluating the abnormal noise problems found in Step 8; Step 10, problem analysis, analyzing the causes of the abnormal noise problems recorded in Step 9; Step 11, result output, outputting the analysis results in Step 10 to form a seat assembly abnormal noise evaluation analysis report. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The test method of the test device according to claim 1, characterized in that: The No. 1 vibration sensor and the No. 2 vibration sensor are used for road condition simulation; The No. 1 vibration sensor is a three-way sensor, and the vibration direction is the X-axis, Y-axis and Z-axis direction; the No. 1 sensor arrangement position (5) is the last end of the left rail of the main driver seat; The No. 2 vibration sensor is a single-way sensor, and the vibration direction is the Z-axis direction; The No. 2 sensor arrangement position (6) is the front end of the right rail of the co-driver seat.

3. The test method of claim 2, wherein: In step 5, When there is no test vehicle in the early stage of development, collect the vibration data of the seat fixing points of the benchmark vehicle or platform vehicle; The different kinds of road surfaces include bumpy road surface, cobblestone road, Belgian road surface and rough cement road.

4. The test method of claim 3, wherein: In step 7, The frequency range of the target signal concerned is 5-100 Hz; The error of the obtained final test bench collection point vibration signal and the target signal is less than 5%.

5. The test method of claim 4, wherein: In step 9, The abnormal sound problem includes the position, phenomenon, occurrence condition and abnormal sound perception degree information of the abnormal sound.

6. The test method of claim 5, wherein: In step 10, The abnormal sound problem is divided into part manufacturing problem, assembly problem and design defect problem, and for complex problems, the road simulation test is repeatedly performed to lock the real cause of the abnormal sound. 7.An electronic device comprising a memory and a processor, the memory storing a computer program, wherein, The processor executes the computer program to realize the steps of the method in any one of claims 1-6.

8. A computer readable storage medium for storing computer instructions, characterized in that, The computer instructions are executed by the processor to realize the steps of the method in any one of claims 1-6.

9. A vehicle characterized by comprising: Comprise: Memory, processor and computer program stored on the memory and executable on the processor, the processor executes the program to realize the steps of the method in any one of claims 1-6.

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