A high-low temperature test-based vehicle door assembly NVH test device and a control method thereof

Abstract

The application discloses a kind of based on high-low temperature test vehicle door assembly NVH test equipment and its control method, belong to automobile parts test technical field, including being positioned in the inside of environmental warehouse door positioning assembly, the door positioning assembly includes vertical edge end fixed in the top of support base one end L type cantilever support, the lower part of the one end of the horizontal edge of L type cantilever support is provided with shaft end steering plate, the shaft end steering plate is connected with the one end of telescopic shaft through universal joint, the top of support base is also provided with the lower part of the one end of the horizontal edge of L type cantilever support corresponding two-way attitude sliding table, the attitude execution top plate of two-way attitude sliding table is provided with shaft end steering plate, the other end of telescopic shaft is connected with the shaft end steering plate through universal joint, the side of telescopic shaft is provided with hinge adapter assembly, the other end of support base top is provided with two-way adjustment sliding table, locking column is fixed on the adjustment execution top plate of two-way adjustment sliding table.

Description

Technical Field

[0001] This invention discloses a door assembly NVH testing equipment and its control method based on high and low temperature testing, belonging to the field of automotive component testing technology. Background Technology

[0002] During vehicle testing or after mass production, abnormal noises may occur when raising and lowering car door windows under specific temperature conditions. Tracing the cause of product quality issues can result in significant economic losses.

[0003] Current technical limitations: 1. The door assembly fixing device cannot achieve the same mounting angle as the actual vehicle. 2. The door assembly fixing device requires the door size and shape to be basically consistent; otherwise, it cannot be fixed. 3. Using battery power during window operation and manually switching the positive and negative terminals to drive the door motor forward and reverse rotation makes high-frequency automated testing impossible, and personnel cannot simultaneously enter the environmental chamber for testing. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes a door assembly NVH testing device and its control method based on high and low temperature testing, which simulates the actual vehicle installation state to the greatest extent and enables problem identification at the door assembly level.

[0005] The technical solution of the present invention is as follows:

[0006] According to a first aspect of the present invention, a door assembly NVH testing device based on high and low temperature testing is provided, comprising a door positioning assembly disposed inside an environmental chamber. The door positioning assembly includes an L-shaped cantilever support with its vertical end fixed to one end of the top of a support base. A shaft-end steering plate is disposed at the lower part of one side of the L-shaped cantilever support. The shaft-end steering plate is connected to one end of a telescopic shaft via a universal joint. A bidirectional attitude slide corresponding to the lower part of one side of the L-shaped cantilever support is also disposed at the top of the support base. The attitude control of the bidirectional attitude slide... The top plate is equipped with a shaft end steering plate, which is connected to the other end of the telescopic shaft via a universal joint. The side of the telescopic shaft is equipped with a hinge adapter assembly. The other end of the top of the support base is equipped with a bidirectional adjustment slide. A locking column is fixed on the adjustment execution top plate of the bidirectional adjustment slide. A bidirectional locking slide is provided on the side of the locking column. A clamping assembly is provided on the clamping execution plate of the bidirectional locking slide. An air pipe clamping seat is provided on the top of the support base. Multiple movable casters connected by caster adapter plates are evenly arranged at the bottom of the support base.

[0007] Preferably, a Y-shaped tilting movable handle is fixed to one end of the top of the support base.

[0008] Preferably, an electrical cabinet is fixed to the side of the L-shaped cantilever support away from the telescopic shaft, and a lower-level controller is installed inside the electrical cabinet.

[0009] Preferably, the hinge adapter assembly includes a mounting grille fixed to the side of the large-diameter cylinder of the telescopic shaft. The mounting grille has two sets of two elongated holes, and the mounting grille is slidably connected to an upper hinge adapter plate and a lower hinge adapter plate through the two sets of two elongated holes respectively.

[0010] Preferably, the trachea clamp is disposed between the bidirectional adjustment slide and the bidirectional attitude slide.

[0011] Preferably, an angle sensor is provided on the mounting grille, and the lower controller is electrically connected to the angle sensor. The angle sensor is used to measure the actual angles of the door assembly in the MX and MY directions and feed them back to the lower controller.

[0012] Preferably, the bidirectional attitude slide includes a Y-axis attitude slide disposed on the top of the support base, an X-axis attitude slide disposed on the attitude sliding connecting plate of the Y-axis attitude slide, and an attitude execution top plate of the X-axis attitude slide connected to the shaft end steering plate. The bidirectional adjustment slide includes a Y-axis adjustment slide disposed on the top of the support base, an X-axis adjustment slide disposed on the adjustment connecting plate of the Y-axis adjustment slide, and an adjustment execution top plate of the X-axis adjustment slide connected to one end of the locking column. The bidirectional locking slide includes a Z-axis locking slide disposed on the side of the locking column, an X-axis locking slide disposed on the locking connecting plate of the Z-axis locking slide, and a clamping execution plate of the X-axis locking slide connected to the clamping assembly.

[0013] Preferably, the clamping assembly includes a support base disposed on the clamping execution plate, a support optical shaft is fixedly mounted on the side of the support base, a hollow polyurethane gasket is sleeved on the support optical shaft, and a locking caliper is disposed on the support base.

[0014] Preferably, the lower-level controller is connected to the industrial control computer network via a wireless module, wherein:

[0015] The industrial control computer is used to: send control words to the lower-level controller via a wireless module, wherein the control words include: motor cooling output for controlling the cooling system; electrical cabinet cooling output signal; data acquisition start output signal to notify the data acquisition equipment to start data acquisition; electrical cabinet heating output signal to protect the electrical cabinet when the temperature is too low; and motor forward rotation output and motor reverse rotation output signals to drive the lifting and lowering of the car door windows.

[0016] The lower-level controller is used to acquire: control words sent by the industrial control computer via a wireless module; the actual angles of the door assembly in the MX and MY directions; real-time current of the two wire harnesses at the 12V and 0V ends collected by a current sensing sensor during the process of the DC adjustable power supply supplying power to the door motor; simultaneous monitoring and comparison of waveform consistency to avoid abnormal actions caused by leakage and sensor damage; real-time acquisition of ambient temperature and humidity as important data for the current door assembly test environment; and electrical cabinet temperature acquisition signal. When the temperature is too high or too low, exceeding the tolerance temperature of the controller and other important components, forced purging and ventilation are activated, and an alarm is triggered. The signal is also transmitted to the industrial control computer via a wireless module for display.

[0017] According to a second aspect of the present invention, a control method for a door assembly NVH testing device based on high and low temperature testing is provided, applied to the door assembly NVH testing device based on high and low temperature testing described in the first aspect, comprising:

[0018] Step S10: Activate manual mode, manually raise the glass, test the rising stall current, and the current limit input C1 when the glass reaches the rising position. Manually lower the glass, and test the falling stall current and the current limit input C2 when the glass reaches the falling position.

[0019] Step S20: Set the number of tests X1, sampling interval X2, rise-to-position delay X3, fall-to-position delay X4, and single run time test X5 respectively;

[0020] Step S30: Start the test. The door motor rotates in both forward and reverse directions to raise and lower the door glass. When the motor current reaches C1 during the upward movement, it stops and then lowers after a delay of X3s. When the motor current reaches C2 during the upward movement, it stops and then rises after a delay of X4s. This process continues until the motor current reaches C1 again. This completes one cycle. Record the number of runs X6.

[0021] Step S40: When the system runs for a multiple of X2, the cooling system stops to prevent air noise. The data acquisition start signal is triggered simultaneously, the data acquisition program starts, the abnormal noise data is collected once, and then the system stops and waits for the next trigger. The data acquisition time is X5. After the data acquisition is completed, the cooling system is restarted.

[0022] Step S50, repeat steps S40 and S30 until X6 = X1, then the experiment stops.

[0023] The advantages of this invention compared to existing technologies are as follows:

[0024] This invention discloses an NVH testing device and its control method for vehicle door assemblies based on high and low temperature testing. It achieves full decoupling of the mechanical mounting components of the tested door assembly, meeting the size requirements of most current vehicle models while enabling rapid installation and arbitrary posture adjustment, maximizing the simulation of real vehicles. Through a wireless control design between the industrial computer and the lower-level controller, it meets the requirements for remote operation and data acquisition, enabling high and low temperature testing. Simultaneously, it utilizes an intermittent cooling system control strategy to maintain constant temperature for the door lifting motor and the lower-level controller within the environmental chamber. Finally, through automated software design, it achieves interactive control with data acquisition, thereby completing high-frequency automated testing. This allows for maximum simulation of the testing conditions of real vehicles, ensuring the scientific validity of the tests. It can identify and resolve quality problems at the assembly level, filling a gap in testing equipment capabilities, avoiding huge losses after mass production, and significantly reducing R&D costs. Attached Figure Description

[0025] Figure 1 This is a structural diagram of a door assembly NVH testing device based on high and low temperature testing according to the present invention.

[0026] Figure 2 This is another example structural diagram of the NVH testing equipment for a car door assembly based on high and low temperature testing according to the present invention.

[0027] Figure 3 This is a schematic diagram of the operation of a door assembly NVH testing device based on high and low temperature testing according to the present invention.

[0028] Figure 4 This is a schematic diagram of the operation of a door assembly NVH testing device based on high and low temperature testing according to the present invention.

[0029] Figure 5 This is a schematic diagram of the operation of a door assembly NVH testing device based on high and low temperature testing according to the present invention.

[0030] Figure 6 This is an electrical schematic diagram of a door assembly NVH testing device based on high and low temperature testing according to the present invention.

[0031] in:

[0032] 1-L-type cantilever support;

[0033] 2-Electrical cabinet;

[0034] 3-Y type tilting moving handle;

[0035] 4-Telescopic shaft;

[0036] 5-Cast adapter plate;

[0037] 6- Casters;

[0038] 7-X-axis attitude slide;

[0039] 8-Y axis attitude slide;

[0040] 9-Support base;

[0041] 10-Shaft end steering plate;

[0042] 11-Install the grille;

[0043] 12-Upper hinge adapter plate;

[0044] 13-Lower hinge adapter plate;

[0045] 14-X-axis adjustment slide;

[0046] 15-Y-axis adjustment slide;

[0047] 16-Locking caliper;

[0048] 17-Support base;

[0049] 18-Polyurethane gasket;

[0050] 19 - Supporting optical axis;

[0051] 20-X-axis locking slide;

[0052] 21-Z-axis locking slide;

[0053] 22-Locking pin;

[0054] 23-Angle sensor. Detailed Implementation

[0055] The following is based on the appendix Figure 1-3 Further explanation of the present invention:

[0056] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. 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.

[0057] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0059] like Figure 1 As shown, the first embodiment of the present invention provides a door assembly NVH testing device based on high and low temperature tests, based on the prior art. It includes a door positioning assembly installed inside an environmental chamber. The door positioning assembly includes an L-shaped cantilever support 1 with its vertical end fixed to one end of the top of a support base 9. A shaft end steering plate 10 is provided at the lower part of one side of the L-shaped cantilever support 1. The shaft end steering plate 10 is connected to one end of a telescopic shaft 4 via a universal joint. A bidirectional attitude slide corresponding to the lower part of one side of the L-shaped cantilever support 1 is also installed on the top of the support base 9. The bidirectional attitude slide... The attitude execution top plate is equipped with a shaft end steering plate 10, which is connected to the other end of the telescopic shaft 4 via a universal joint. A hinge adapter assembly is installed on the side of the telescopic shaft 4. A bidirectional adjustment slide is installed on the other end of the top of the support base 9. A locking column 22 is fixed on the adjustment execution top plate of the bidirectional adjustment slide. A bidirectional locking slide is installed on the side of the locking column 22. A clamping assembly is installed on the clamping execution plate of the bidirectional locking slide. An air pipe clamping seat 24 is installed on the top of the support base 9. Multiple movable casters 6 connected by caster adapter plates 5 are evenly arranged at the bottom of the support base 9.

[0060] The support base 9 has a Y-shaped tilting handle 3 fixed to one end of its top, and an electrical cabinet 2 fixed to the side of the L-shaped cantilever support 1 away from the telescopic shaft 4. The electrical cabinet 2 mainly supports electrical components such as the lower controller, wireless transceiver module, and voltage regulator. The hinge adapter assembly includes a mounting grille 11 fixed to the side of the large-diameter cylinder of the telescopic shaft 4 via reinforcing ribs. The mounting grille 11 has two sets of two elongated holes, through which the upper hinge adapter plate 12 and the lower hinge adapter plate 13 can be slidably connected. When the hinge mounting hole is horizontal, it can be matched with the horizontal strip hole for connection; when the hinge mounting hole is vertical, it can be matched with both the horizontal and vertical mounting holes for connection 13. The structure of the lower hinge adapter plate is the same as that of the upper hinge adapter plate, which can correspond to the two lower elongated holes of the mounting grille 11 and can be slid up and down for adjustment. Finally, it is tightened to achieve the matching connection of the lower hinge of the door assembly. By adjusting the upper hinge adapter plate 12 and the lower hinge adapter plate 13, hinge connections for most sizes of car door assemblies on the market can be achieved.

[0061] The airway clamp 24 is positioned between the bidirectional adjustment slide and the bidirectional attitude slide. It is used to flexibly support the outer surface of the door assembly and prevent damage to the door assembly. An angle sensor 23 is installed on the mounting grille 11. The lower controller is electrically connected to the angle sensor 23. The angle sensor 23 is used to measure the actual angles of the door assembly in the MX and MY directions and feed them back to the lower controller.

[0062] The bidirectional attitude slide includes a Y-axis attitude slide 8 mounted on the top of the support base 9. An X-axis attitude slide 7 is mounted on the attitude sliding connecting plate of the Y-axis attitude slide 8. The attitude execution top plate of the X-axis attitude slide 7 is connected to the shaft end steering plate 10. The X-axis attitude slide 7 and the Y-axis attitude slide 8 can thus achieve the movement of the top plate in the X and Y directions through the handwheel, thereby completing the swing of the telescopic shaft 4 in the MX and MY directions.

[0063] The bidirectional adjustment slide includes a Y-axis adjustment slide 15 mounted on the top of the support base 9. An X-axis adjustment slide 14 is provided on the adjustment connecting plate of the Y-axis adjustment slide 15. The adjustment execution top plate of the X-axis adjustment slide 7 is connected to one end of the locking column 22. The Y-axis adjustment slide 15 and the X-axis adjustment slide 14 can move the top plate in the X and Y directions through the handwheel, thereby completing the position adjustment of the locking column 22 in the XY plane.

[0064] The bidirectional locking slide includes a Z-axis locking slide 21 disposed on the side of the locking column 22, an X-axis locking slide 20 disposed on the locking connecting plate of the Z-axis locking slide 21, and a clamping execution plate of the X-axis locking slide 20 connected to the clamping assembly.

[0065] The clamping assembly includes a support base 17 mounted on a clamping actuator plate. A support optical shaft 19 is fixed to the side of the support base. Specifically, one end of the support optical shaft 19 is machined with an external thread, which can be screwed into the internal thread of the support base 17 for fixation. A hollow polyurethane washer 18 is sleeved on the support optical shaft 19. The polyurethane washer 18 is used to flexibly support the outer surface of the door assembly and prevent damage to the door assembly. A locking caliper 16 is installed on the support base 17.

[0066] like Figure 2 As shown, in another embodiment, a bidirectional locking slide is installed on each side of the locking column 22, and a clamping assembly is installed on the clamping execution plate of the bidirectional locking slide. This can be accomplished by installing the upper hinge adapter plate 12 and the lower hinge adapter plate 13 on the other side of the mounting grille 11, and simultaneously replacing or adding the clamping mechanism on the opposite side.

[0067] like Figure 3-5As shown, the door hinges are first installed correspondingly to the upper hinge adapter plate 12 and the lower hinge adapter plate 13. The hinge fixing mechanism generally consists of a fixing bolt and a threaded hole. The overall structure is divided into two types: horizontal and vertical. For the horizontal structure, the horizontal slots on the hinge adapter plate are used for connection. For the vertical structure, the horizontal and vertical slots on the hinge adapter plate are combined for connection. The bolts on the hinges are tightened with nuts. The threaded holes are tightened with bolts, thus achieving a fixed connection between the upper and lower hinges and the upper and lower hinge adapter plates 12 and 13. Then, the four threaded holes on each of the upper and lower hinge adapter plates 12 and 13 are bolted to the two elongated holes on the mounting grille 11, ultimately fixing the door assembly to the mounting grille 11. To fix the door lock position, the X-axis adjusting slide 14 and Y-axis adjusting slide 15 are used to adapt to the door size. Then, the X-axis locking slide 20 and Z-axis locking slide 21 are adjusted to adjust the clamping position. Finally, the locking caliper 16 is used to press the edge of the door assembly. This achieves quick fixation of the door assembly. When the door posture needs to be adjusted, first release the locking caliper 16, adjust the X-axis posture slide 7 as needed to adjust the inward tilt angle, then adjust the Y-axis posture slide 8 to adjust the side tilt angle, and finally tighten the locking caliper 16 to fix the position simulating the real vehicle state.

[0068] like Figure 6 As shown, the human-machine interface is implemented by an industrial control computer (ICC), while the specific local control of the equipment consists of a lower-level controller. Both the ICC and the lower-level controllers are equipped with wireless modules, enabling wireless communication between them. This allows for remote operation and monitoring of the equipment inside the high and low temperature chambers from outside the environmental chamber, such as in a control room. The design logic is as follows: the ICC sends control words to the lower-level controller, which is then transmitted via the wireless module. The lower-level controller executes the specific control logic based on the control words, ensuring that the test execution is not affected by communication stability. Simultaneously, the lower-level controller collects required signals and transmits them to the ICC via the wireless module, thereby achieving local monitoring of the equipment and test status. Specifically:

[0069] The industrial control computer is used to send control words to the lower-level controller via a wireless module. These control words include: motor cooling output for controlling the cooling system; electrical cabinet cooling output signal; data acquisition start output signal to notify the data acquisition equipment to begin data acquisition; electrical cabinet heating output signal to protect the electrical cabinet from low temperatures; and forward and reverse output signals for the motor driving the car door windows. The motor cooling output and electrical cabinet cooling output are generally controlled by using air pipes and solenoid valves for on / off operation. For motor cooling, the air pipe is directly directed at the car door window motor for blowing air; for electrical cabinet cooling, the air pipe is inserted into the electrical cabinet to force ventilation, thereby maintaining a constant temperature for critical components.

[0070] The lower-level controller acquires control words sent by the industrial computer via a wireless module; MX and MY angle adjustment display signals during door posture adjustment; and real-time current of the 12V and 0V wire harnesses is collected by current sensors during the DC adjustable power supply to the door motor. Simultaneous monitoring and comparison of waveform consistency helps prevent abnormal actions caused by leakage or sensor damage. The controller also collects real-time ambient temperature and humidity data as crucial parameters for the current door assembly testing environment. The electrical cabinet temperature acquisition signal serves as a critical parameter for protecting components within the cabinet. When the temperature is too high or too low, exceeding the tolerance temperature of the controller and other critical components, forced purging and ventilation are activated, and an alarm is triggered.

[0071] The second embodiment of the present invention provides a control method for a door assembly NVH testing device based on high and low temperature tests, based on the first embodiment, characterized in that it includes:

[0072] Step S10: Activate manual mode, manually raise the glass, test the rising stall current, and the current limit input C1 when the glass reaches the rising position. Manually lower the glass, and test the falling stall current and the current limit input C2 when the glass reaches the falling position.

[0073] Step S20: Set the number of tests X1, sampling interval X2, rise-to-position delay X3, fall-to-position delay X4, and single run time test X5 respectively;

[0074] Among them, the test number setting X1 means the total number of lifting and lowering tests; the test number setting X1 means the total number of lifting and lowering tests; the lifting-to-position delay setting X3 means that when the door glass rises to the stall current C1, it stays for X3 time before falling; the single run time test X5 is recorded, which means the time for one cycle of lifting and lowering the door glass, which is automatically calculated using the time difference between two triggers of the stall current C1 during the rising process.

[0075] Step S30: Start the test. The door motor rotates in both forward and reverse directions to raise and lower the door glass. When the motor current reaches C1 during the upward movement, it stops and then lowers after a delay of X3s. When the motor current reaches C2 during the upward movement, it stops and then rises after a delay of X4s. This process continues until the motor current reaches C1 again. This completes one cycle. Record the number of runs X6.

[0076] Step S40: When the system runs for a multiple of X2, the cooling system stops to prevent air noise. The data acquisition start signal is triggered simultaneously, the data acquisition program starts, the abnormal noise data is collected once, and then the system stops and waits for the next trigger. The data acquisition time is X5. After the data acquisition is completed, the cooling system is restarted.

[0077] Step S50, repeat steps S40 and S30 until X6 = X1, then the experiment stops.

[0078] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Other modifications can be readily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and examples shown and described herein.

Claims

1. A door assembly NVH testing device based on high and low temperature testing, characterized in that, The system includes a door positioning assembly installed inside the environmental chamber. The door positioning assembly includes an L-shaped cantilever support (1) with its vertical end fixed to one end of the top of a support base (9). A shaft-end steering plate (10) is provided at the lower part of one horizontal end of the L-shaped cantilever support (1). The shaft-end steering plate (10) is connected to one end of a telescopic shaft (4) via a universal joint. The top of the support base (9) is also provided with a bidirectional attitude slide corresponding to the lower part of one horizontal end of the L-shaped cantilever support (1). The attitude execution top plate of the bidirectional attitude slide is provided with the shaft-end steering plate (10). The other end of the telescopic shaft (4) is connected to the telescopic shaft (4) via a universal joint. A hinge adapter assembly is provided on the side of the telescopic shaft (4). A bidirectional adjustment slide is provided at the other end of the top of the support base (9). A locking column (22) is fixed on the adjustment execution top plate of the bidirectional adjustment slide. A bidirectional locking slide is provided on the side of the locking column (22). A clamping assembly is provided on the clamping execution plate of the bidirectional locking slide. An air pipe clamping seat (24) is provided on the top of the support base (9). A plurality of movable casters (6) connected by caster adapter plates (5) are evenly arranged at the bottom of the support base (9).

2. The NVH testing equipment for vehicle door assembly based on high and low temperature testing according to claim 1, characterized in that, The top end of the support base (9) is fixed with a Y-shaped tilting movable handle (3).

3. A door assembly NVH testing device based on high and low temperature testing according to claim 1 or 2, characterized in that, An electrical cabinet (2) is fixed on the side of the L-shaped cantilever support (1) away from the telescopic shaft (4), and a lower-level controller is installed inside the electrical cabinet (2).

4. The NVH testing equipment for vehicle door assembly based on high and low temperature testing according to claim 3, characterized in that, The hinge adapter assembly includes an installation grille (11) fixed on the side of the large-diameter cylinder of the telescopic shaft (4). The installation grille (11) has two sets of two elongated holes. The installation grille (11) is slidably connected to an upper hinge adapter plate (12) and a lower hinge adapter plate (13) through the two sets of two elongated holes.

5. The NVH testing equipment for vehicle door assembly based on high and low temperature testing according to claim 4, characterized in that, The tracheal clamp (24) is positioned between the bidirectional adjustment slide and the bidirectional attitude slide.

6. The equipment for NVH testing of a vehicle door assembly based on high and low temperature testing according to claim 4 or 5, characterized in that, An angle sensor (23) is provided on the mounting grille (11). The lower controller is electrically connected to the angle sensor (23). The angle sensor (23) is used to measure the actual angles of the door assembly in the MX and MY directions and feed them back to the lower controller.

7. The NVH testing equipment for vehicle door assembly based on high and low temperature testing according to claim 6, characterized in that, The bidirectional attitude slide includes a Y-axis attitude slide (8) set on the top of the support base (9), an X-axis attitude slide (7) set on the attitude sliding connecting plate of the Y-axis attitude slide (8), and the attitude execution top plate of the X-axis attitude slide (7) connected to the shaft end steering plate (10). The bidirectional adjustment slide includes a Y-axis adjustment slide (15) set on the top of the support base (9), an X-axis adjustment slide (14) set on the adjustment connecting plate of the Y-axis adjustment slide (15), and the adjustment execution top plate of the X-axis adjustment slide (14) connected to one end of the locking column (22). The bidirectional locking slide includes a Z-axis locking slide (21) set on the side of the locking column (22), an X-axis locking slide (20) set on the locking connecting plate of the Z-axis locking slide (21), and the clamping execution plate of the X-axis locking slide (20) connected to the clamping assembly.

8. The NVH testing equipment for vehicle door assembly based on high and low temperature testing according to claim 7, characterized in that, The clamping assembly includes a support base (17) mounted on the clamping execution plate, a support optical shaft (19) fixedly mounted on the side of the support base, a hollow polyurethane gasket (18) mounted on the support optical shaft (19), and a locking caliper (16) mounted on the support base (17).

9. The NVH testing equipment for vehicle door assembly based on high and low temperature testing according to claim 7, characterized in that, The lower-level controller is connected to the industrial control computer network via a wireless module, wherein: The industrial control computer is used to: send control words to the lower-level controller via a wireless module, wherein the control words include: motor cooling output for controlling the cooling system; electrical cabinet cooling output signal; data acquisition start output signal to notify the data acquisition equipment to start data acquisition; electrical cabinet heating output signal to protect the electrical cabinet when the temperature is too low; and motor forward rotation output and motor reverse rotation output signals to drive the lifting and lowering of the car door windows. The lower-level controller is used to acquire: control words sent by the industrial computer via a wireless module; the actual angles of the door assembly in the MX and MY directions; real-time current of the two wire harnesses at the 12V and 0V ends collected by a current sensing sensor during the process of the DC adjustable power supply supplying power to the door motor; simultaneous monitoring and comparison of waveform consistency to avoid abnormal actions caused by leakage and sensor damage; real-time acquisition of ambient temperature and humidity as important data for the current door assembly test environment; and electrical cabinet temperature acquisition signal. When the temperature is too high or too low, exceeding the tolerance temperature of the controller and other important components, forced purging and ventilation are activated, and an alarm is triggered. The signal is also transmitted to the industrial computer via a wireless module for display.

10. A control method for a door assembly NVH testing device based on high and low temperature testing, applied to the door assembly NVH testing device based on high and low temperature testing as described in any one of claims 1-9, characterized in that, include: Step S10: Activate manual mode, manually raise the glass, test the rising stall current, and the current limit input C1 when the glass reaches the rising position. Manually lower the glass, and test the falling stall current and the current limit input C2 when the glass reaches the falling position. Step S20: Set the number of tests X1, sampling interval X2, rise-to-position delay X3, fall-to-position delay X4, and single run time test X5 respectively; Step S30: Start the test. The door motor rotates in both forward and reverse directions to raise and lower the door glass. When the motor current reaches C1 during the upward movement, it stops and then lowers after a delay of X3s. When the motor current reaches C2 during the upward movement, it stops and then rises after a delay of X4s. This process continues until the motor current reaches C1 again. This completes one cycle. Record the number of runs X6. Step S40: When the system runs for a multiple of X2, the cooling system stops to prevent air noise. The data acquisition start signal is triggered simultaneously, the data acquisition program starts, the abnormal noise data is collected once, and then the system stops and waits for the next trigger. The data acquisition time is X5. After the data acquisition is completed, the cooling system is restarted. Step S50, repeat steps S40 and S30 until X6 = X1, then the experiment stops.

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