Steering wheel modal management and control method and device

Abstract

The invention discloses a steering wheel modal management and control method and device, and relates to the technical field of steering wheel modalities, and the steering wheel modal management and control method comprises the steps: carrying out the fixed constraint of a steering wheel through a first tool, and then measuring the steering wheel modal in a first direction; the vibration of the steering wheel led out by the steering wheel mode in the first direction in the whole vehicle experiment is eliminated; fixing and constraining the tubular column by means of a second tool to obtain the modal of the tubular column in the first direction, thereby eliminating the vibration of the steering wheel led out by the modal of the tubular column in the first direction in the whole vehicle experiment; finally, the steering wheel is installed on the tubular column, and the common constraint mode of the steering wheel and the tubular column in the first direction is measured, so that the vibration of the steering wheel caused by the common constraint mode of the steering wheel and the tubular column in the first direction in a whole vehicle experiment is eliminated, and the position causing the vibration of the steering wheel can be gradually eliminated; the present invention improves the problem that it is difficult to quickly find the position of a member that causes steering wheel shake on the whole.

Description

Technical Field

[0001] The present invention relates to the technical field of steering wheel modes, and in particular to a steering wheel mode control method and device. Background Art

[0002] Vehicle NVH (noise, vibration and harshness) is a comprehensive issue to measure the quality of automobile manufacturing; among them, low-frequency vibration is an important indicator for the subjective evaluation of passenger car NVH performance. The vibration of the steering wheel can be directly evaluated through the touch of the driver's fingers and is easily perceived by consumers.

[0003] The steering wheel mode is the natural frequency and vibration mode of the steering wheel, and is an inherent property of the steering wheel system. The steering wheel system mode is determined by the stiffness of the steering wheel, column, CCB (tube beam assembly) and body mounting points. When controlling the steering wheel mode, it is often tested on a real vehicle with the steering wheel installed on the real vehicle, and only the mode of the steering wheel installed on the vehicle can be controlled. The vibration of the steering wheel is mainly caused by resonance between the steering wheel mode and the modes of other body components. When the steering wheel vibrates during the vehicle test, it is difficult to quickly find the location of the component causing the steering wheel vibration. Summary of the invention

[0004] The main purpose of the present invention is to propose a steering wheel modal control method and device, aiming to improve the problem of difficulty in quickly finding the position of components causing steering wheel vibration.

[0005] To achieve the above object, the steering wheel modal control method proposed in the present invention comprises the following steps:

[0006] S1: Select the first tooling and fix the first tooling on the workbench, and then fix the steering wheel on the first tooling;

[0007] S2: arranging a first acceleration sensor in a first direction of the steering wheel, then hammering the steering wheel along the first direction, and recording a first transfer function displayed by the first acceleration sensor;

[0008] S3: taking the peak value of the first transfer function as a steering wheel mode in a first direction;

[0009] S4: removing the steering wheel from the first tooling;

[0010] S5: Select the second tooling, fix the second tooling on the workbench, and then fix the pipe column on the second tooling;

[0011] S6: arranging a second acceleration sensor in the first direction of the pipe string, then hammering the pipe string along the first direction, and recording a second transfer function displayed by the second acceleration sensor;

[0012] S7: taking the peak value of the second transfer function as the string mode in the first direction;

[0013] S8: fixing the steering wheel on the column, then arranging a third acceleration sensor in the first direction of the steering wheel, and finally hammering the steering wheel along the first direction, and recording a third transfer function displayed by the third acceleration sensor;

[0014] S9: taking the peak of the third transfer function as the common constrained mode of the column and the steering wheel in the first direction.

[0015] In one embodiment, the length direction of the actual vehicle is set as the X direction, the width direction of the actual vehicle is set as the Y direction, and the height direction of the actual vehicle is set as the Z direction.

[0016] The first direction is set to the X, Y and Z directions in sequence, and steps S2-S3 are repeated to measure the steering wheel modes in the X, Y and Z directions respectively;

[0017] Repeat steps S6-S7 to measure the pipe string modes in the X, Y and Z directions respectively;

[0018] Repeat steps S8-S9 to measure the common constraint modes of the column and the steering wheel in the X, Y and Z directions respectively.

[0019] The present invention also provides a steering wheel modal control device, comprising a first tool and a second tool, wherein the first tool is used to fix and constrain the steering wheel, and the second tool is used to fix and constrain the column.

[0020] In one embodiment, the first tooling includes a fixing seat and a fixing bolt, the fixing seat is used to be fixed on a workbench, a first fixing hole is penetrated through the fixing seat, a nut of the fixing bolt is located on the bottom side of the fixing seat, and a threaded section of the fixing bolt passes through the first fixing hole and is used to be threadedly connected to the steering wheel.

[0021] In one embodiment, a second fixing hole is formed on the fixing seat, and the second fixing hole is used to connect to a mounting bolt on the workbench.

[0022] In one embodiment, four second fixing holes are provided, and the four second fixing holes are arranged around the first fixing hole.

[0023] In one embodiment, the second tooling includes a column for fixing on a workbench, wherein four columns are provided, and the four columns are respectively arranged at the four corners of a rectangle, and the four columns are opposite to each other in pairs, and sliders are installed for lifting on the sides of two opposite columns that are close to each other, and the four sliders respectively correspond to four mounting holes on the mounting bracket of the pipe column, and matching holes for aligning the mounting holes are opened on the sliders.

[0024] In one embodiment, a first waist hole is formed on the column, a locking hole is formed on the slider, a locking bolt is provided in the locking hole, and the locking bolt passes through the first waist hole and is threadedly connected with a locking nut.

[0025] In one embodiment, the locking hole is a second waist hole, and the first waist hole is perpendicular to the second waist hole.

[0026] The second tooling also includes a fixing plate and a bottom plate, wherein the bottom plate is fixedly connected to the column, a third fixing hole for connecting the mounting bolts on the workbench is provided on the fixing plate, and a side of the fixing plate close to the workbench abuts against the bottom plate.

[0027] The technical solution of the present invention firstly uses a first tool to fix and constrain a separate steering wheel, and then uses a hammering method to measure the steering wheel mode in the first direction. When the steering wheel mode in the first direction meets the predetermined modal control target value, the steering wheel vibration induced by the steering wheel mode in the first direction in the whole vehicle test can be eliminated, thereby achieving the control of the steering wheel mode; using a second tool to fix and constrain a separate pipe column, and then uses a hammering method to measure the mode of the pipe column in the first direction. When the pipe column mode in the first direction meets the predetermined pipe column modal control target value, the steering wheel vibration induced by the steering wheel mode in the first direction in the whole vehicle test can be eliminated. The steering wheel vibration induced by the column mode in the first direction realizes the control of the column mode; finally, the steering wheel is installed on the column, and the common constrained mode of the steering wheel and the column in the first direction is measured by the hammering method. When the common constrained mode of the steering wheel and the column in the first direction meets the predetermined modal control target after the common constraint of the steering wheel and the column, the steering wheel vibration caused by the mode after the common constraint of the steering wheel and the column in the first direction in the whole vehicle test can be eliminated, and the position causing the steering wheel vibration can be quickly eliminated. The problem of difficulty in quickly finding the position of the component causing the steering wheel shake is improved as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0029] Figure 1 A schematic structural diagram of an embodiment of the first tooling provided by the present invention;

[0030] Figure 2 A schematic structural diagram of an embodiment of the second tooling provided by the present invention;

[0031] Figure 3 For along Figure 1 The cross-sectional view made by AA in the figure;

[0032] Figure 4 A schematic diagram of the structure of the slider connection in the second tooling provided by the present invention;

[0033] Figure 5 For along Figure 4 Sectional view made by BB.

[0034] Description of Figure Numbers:

[0035] 100. First tooling; 1. Fixing seat; 11. First fixing hole; 12. Second fixing hole; 2. Fixing bolt.

[0036] 200, second tooling; 3, column; 31, first waist hole; 32, connecting hole; 4, slider; 41, matching hole; 42, locking hole; 5, locking bolt; 51, locking nut; 6, fixing plate; 61, third fixing hole; 7, bottom plate; 71, positioning hole; 72, placement slot; 8, connecting bolt.

[0037] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0041] The vibration of the steering wheel can be directly sensed and evaluated through the touch of the driver's fingers. It is easy for consumers to perceive it, and it is often necessary to control the vibration of the steering wheel. The steering wheel mode is the natural frequency and vibration mode of the steering wheel, and is an inherent property of the steering wheel system. The steering wheel system mode is determined by the stiffness of the steering wheel, column, CCB (tube beam assembly) and body mounting point. The vibration of the steering wheel is mainly caused by the resonance between the steering wheel mode and the mode of other parts of the body. When controlling the steering wheel mode, it is often tested on a real vehicle. The steering wheel is installed on the real vehicle, and only the steering wheel mode installed on the vehicle can be controlled. When the steering wheel vibrates during the whole vehicle test, it is difficult to quickly find the location that causes the steering wheel to shake.

[0042] The present invention provides a steering wheel modal control method.

[0043] In one embodiment of the present invention, the steering wheel modal control method comprises the following steps:

[0044] Step S1: Select a first tool 100, and fix the first tool 100 on a workbench, and then fix the steering wheel on the first tool 100;

[0045] Step S2: fixing a first acceleration sensor in a first direction of the steering wheel, then hammering the steering wheel along the first direction, and recording a first transfer function displayed by the first acceleration sensor;

[0046] Step S3: taking the peak value of the first transfer function as the steering wheel mode in the first direction;

[0047] Step S4: removing the steering wheel from the first tooling 100;

[0048] Step S5: Select the second tooling 200, and fix the second tooling 200 on the workbench, and then fix the pipe column on the second tooling 200;

[0049] Step S6: arranging a second acceleration sensor in the first direction of the pipe string, then hammering the pipe string along the first direction, and recording a second transfer function displayed by the second acceleration sensor;

[0050] Step S7: taking the peak value of the second transfer function as the string mode in the first direction;

[0051] Step S8: fixing the steering wheel on the column, then arranging a third acceleration sensor in the first direction of the steering wheel, and finally hammering the steering wheel along the first direction, and recording a third transfer function displayed by the third acceleration sensor;

[0052] Step S9: taking the peak of the third transfer function as the common constrained mode of the column and the steering wheel in the first direction.

[0053] In the embodiment of the present invention, a single steering wheel is fixedly constrained by the first tool 100, and then the steering wheel mode in the first direction is measured by a hammering method. When the steering wheel mode in the first direction meets the predetermined control target value, the steering wheel vibration caused by the steering wheel mode in the first direction in the whole vehicle test can be eliminated, thereby achieving the control of the steering wheel mode. With the help of the second tool 200, a single pipe column is fixedly constrained, and then the mode of the pipe column in the first direction is measured by a hammering method. When the pipe column mode in the first direction meets the predetermined control target value, the steering wheel vibration caused by the steering wheel mode in the first direction in the whole vehicle test can be eliminated. The steering wheel vibration induced by the column mode in one direction realizes the control of the column mode; finally, the steering wheel is installed on the column, and the common constrained mode of the steering wheel and the column in the first direction is measured by the hammering method. When the common constrained mode of the steering wheel and the column in the first direction meets the predetermined modal control target after the common constraint of the steering wheel and the column, the steering wheel vibration caused by the mode after the common constraint of the steering wheel and the column in the first direction in the whole vehicle test can be eliminated, and the position causing the steering wheel vibration can be quickly eliminated, which improves the problem of difficulty in quickly finding the position of the component causing the steering wheel shake as a whole.

[0054] In the test, the length direction of the actual vehicle is set as the X direction, the width direction of the actual vehicle is set as the Y direction, and the height direction of the actual vehicle is set as the Z direction;

[0055] The first direction is set to the X, Y and Z directions in sequence, and steps S2-S3 are repeated to measure the steering wheel modes in the X, Y and Z directions respectively;

[0056] Repeat steps S6-S7 to measure the pipe string modes in the X, Y and Z directions respectively;

[0057] Repeat steps S8-S9 to measure the common constraint modes of the column and the steering wheel in the X, Y and Z directions respectively.

[0058] By setting the first direction to the X, Y and Z directions in sequence, the steering wheel modes in the X, Y and Z directions can be measured respectively, so that the modes of the steering wheel in the X, Y and Z directions can be controlled respectively; by measuring the column modes in the X, Y and Z directions respectively, the modes of the column in the X, Y and Z directions can be controlled respectively; by measuring the common constraint modes of the column and the steering wheel in the X, Y and Z directions respectively, the control of the common constraint modes of the column and the steering wheel in the X, Y and Z directions is realized.

[0059] In step S1, the mode of the first tooling 100 needs to be controlled to reduce the interference of the first tooling 100 on the measurement. The specific steps include:

[0060] Step S11: Select a first tool 100, and fix the selected first tool 100 on a workbench, and then fix the fourth acceleration sensor in a first direction of the first tool 100;

[0061] Step S12: striking the first tool 100 along the first direction by hammering, and recording the transfer function of the fourth acceleration sensor;

[0062] Step S13: taking the maximum value of the transfer function of the fourth acceleration sensor as the mode of the first tooling 100 in the first direction;

[0063] Step S14: setting the target value of the control of the mode of the steering wheel in the first direction to X1-X2 (X1 and X2 are both frequencies of a certain magnitude, and X2 is greater than X1), when the mode of the first tooling 100 is greater than five times of X2, the mode of the first tooling 100 in the first direction meets the control requirements;

[0064] The first direction is set to X, Y and Z directions in sequence. When the modes of the first tooling 100 in the X, Y and Z directions all meet the control requirements, that is, when the first tooling 100 is used to fix and constrain the steering wheel, the steering wheel modes in the X, Y and Z directions can be tested arbitrarily; when any one of the first tooling modes in the X, Y and Z directions does not meet the control requirements, repeat steps S11-S14 and reselect the first tooling 100.

[0065] Specifically, when the steering wheel modal control range in the first direction is 60 Hz-100 Hz, the mode in the first direction of the first tooling 100 must be greater than 500 Hz to meet the requirements.

[0066] In step S5, the mode of the second tooling 200 needs to be controlled to reduce the interference of the second tooling 200 on the measurement. The specific steps include:

[0067] Step S51: Select a second tool 200, and fix the selected second tool 200 on a workbench, and then fix the fifth acceleration sensor in a first direction of the second tool 200;

[0068] Step S52: striking the second tool 200 along the first direction by hammering, and recording the transfer function of the fifth acceleration sensor;

[0069] Step S53: taking the maximum value of the transfer function of the fifth acceleration sensor as the mode of the second tooling 200 in the first direction;

[0070] Step S54: setting the target value of the control of the mode of the steering wheel in the first direction to X3-X4 (X3 and X4 are both frequencies of a certain size, and X4 is greater than X3). When the mode of the second tooling 200 is greater than five times of X4, the mode of the second tooling 200 in the first direction meets the control requirements;

[0071] Specifically, the first direction is set to the X, Y and Z directions in sequence. When the modes of the second tooling 200 in the X, Y and Z directions all meet the control requirements, that is, when the second tooling 200 is used to fix the pipe string, the pipe string modes in the X, Y and Z directions can be tested arbitrarily; when any one of the modes of the second tooling 200 in the X, Y and Z directions does not meet the control requirements, repeat steps S11-S14 and reselect the second tooling 200.

[0072] Specifically, when the modal control range of the pipe string in the first direction is 40 Hz-60 Hz, the modal control range of the first tooling 100 that meets the requirements must be greater than 300 Hz.

[0073] See also Figure 1 and Figure 2 The present invention also proposes a steering wheel modal control device, including a first tool 100 and a second tool 200. The first tool 100 is used to fix and constrain the steering wheel, and the second tool 200 is used to fix and constrain the pipe column. In the embodiment of the present invention, the steering wheel is fixed by the first tool 100, and the pipe column is fixed by the second tool 200, so that the steering wheel and the pipe column can be fixed and constrained respectively at the same time. The overall upper part is convenient for testing the steering wheel mode and the pipe column mode at the same time, which can improve the efficiency of the test.

[0074] See also Figure 1 and Figure 3The first tool 100 includes a fixing seat 1 and a fixing bolt 2. The fixing seat 1 is used to be fixed on a workbench. A first fixing hole 11 is provided on the fixing seat 1. The nut of the fixing bolt 2 is located at the bottom side of the fixing seat 1. The threaded section of the fixing bolt 2 passes through the first fixing hole 11 and is used to be threadedly connected with the steering wheel. First, the nut of the fixing bolt 2 is placed on the lower side of the fixing seat 1, and the threaded section of the fixing bolt 2 passes through the first fixing hole 11. Then, the fixing seat 1 is fixed on the workbench. The nut of the fixing bolt 2 can be pressed against the workbench to fix the fixing bolt 2. After the steering wheel is threadedly connected to the threaded section of the fixing bolt 2, the fixed constraint of the steering wheel can be realized.

[0075] Specifically, the workbench can be a metal table or a metal floor, and the inner side of the first fixing hole 11 can be provided with an internal thread adapted to the thread of the fixing bolt 2. After the threaded section of the fixing bolt 2 is inserted into the first fixing hole 11, the stability of the connection between the fixing bolt 2 and the fixing seat 1 can be enhanced, thereby strengthening the fixing bolt 2. When measuring the first tooling 100, the fourth acceleration sensor can be installed on the threaded section of the fixing bolt 2.

[0076] See also Figure 1 and Figure 3 The fixing base 1 is provided with a second fixing hole 12, and the second fixing hole 12 is used to connect the mounting bolts on the workbench. When the fixing base 1 is installed on the workbench, the threaded section of the mounting bolt on the workbench passes through the second fixing hole 12, and then the nut is tightened on the mounting bolt, so that the nut can press the fixing base 1 against the workbench, thereby fixing the fixing base 1.

[0077] There are four second fixing holes 12 , and the four second fixing holes 12 are arranged around the first fixing hole 11 . The four fixing holes facilitate fixing the fixing base 1 from all sides, thereby improving the firmness of fixing the fixing base 1 .

[0078] The second fixing hole 12 is a waist-shaped hole, the length directions of two adjacent second fixing holes 12 are perpendicular, the extension lines of two opposite second fixing holes 12 coincide, and the second fixing hole 12 is arranged to penetrate the circumference of the fixing base 1. When the size of the fixing base 1 remains unchanged, more distributed types of mounting bolts can pass through the second fixing hole 12, thereby improving the convenience of fixing the fixing base 1.

[0079] See also Figure 2 and Figure 4The second tooling 200 includes a column 3 for fixing on a workbench. There are four columns 3, which are arranged at the four corners of a rectangle respectively, and the four columns 3 are opposite to each other in pairs. Sliders 4 are installed on the sides of two opposite columns 3 that are close to each other for lifting. The four slides 4 correspond to the four mounting holes on the mounting bracket of the column respectively. A plurality of matching holes 41 for aligning the mounting holes are opened on the peripheral side of the slide 4, and threads are opened on the inner walls of the matching holes 41.

[0080] The common pipe column mounting bracket is provided with four mounting holes for fixing the pipe column to the vehicle. By passing the bolts through the mounting holes and screwing them into the matching holes 41, the mounting bracket can be fixed to the four columns 3, thereby achieving the fixation of the pipe column and reproducing the fixing method of the pipe column in the vehicle. Steering wheels of different sizes are different in size. By controlling the lifting and lowering of the slider 4, the distance between the pipe column and the workbench can be changed, so that it is convenient to install steering wheels of different sizes on the pipe column.

[0081] See also Figure 1 , Figure 4 and Figure 5 The column 3 is provided with a first waist hole 31, the slider 4 is provided with a locking hole 42, a locking bolt 5 is provided in the locking hole 42, the locking bolt 5 passes through the first waist hole 31 and is threadedly connected with a locking nut 51. When the locking bolt 5 is loosened, the slider 4 can be easily slid; after the locking bolt 5 is tightened, the sliding of the slider 4 is locked, thereby realizing the control of the lifting of the slider 4. Further, two first waist holes 31 are provided on the column 3, and the two first waist holes 31 are parallel.

[0082] The locking hole 42 is a second waist hole, and the first waist hole 31 is perpendicular to the second waist hole. By sliding the slider 4 along the length direction of the locking hole 42, the position of the slider 4 in the horizontal direction can be adjusted, thereby adjusting the position between two adjacent sliders 4, which is convenient for aligning the matching hole 41 with the mounting hole on the mounting bracket of the pipe column. Further, two locking holes 42 are provided on the slider, and the two locking holes 42 are parallel.

[0083] See also Figure 1 , Figure 4 and Figure 5 The second tooling 200 further includes a fixing plate 6 and a bottom plate 7. The bottom plate 7 is detachably fixedly connected to the column 3. The fixing plate 6 is provided with a third fixing hole 61 for connecting the mounting bolts on the workbench. The side of the fixing plate 6 close to the workbench abuts against the bottom plate 7. After the mounting bolts are passed through the third fixing holes 61, the nuts are put on the mounting bolts and tightened. The fixing plate 6 can firmly fix the bottom plate 7 on the workbench, thereby realizing the fastening and fixing of the bottom plate 7 on the workbench.

[0084] The third fixing hole 61 may be a waist-shaped hole. After loosening the nut on the mounting bolt, it is convenient to adjust the fixing plate 6 so that the fixing plate 6 is pressed against the upper side of the bottom plate 7 .

[0085] See also Figure 1 , Figure 4 and Figure 5 The column 3 includes a rectangular section and a trapezoidal section, which are cast as one piece, and the rectangular section is located on the upper side of the body section, and the first waist hole 31 is located on the rectangular section.

[0086] A plurality of positioning holes 71 are provided on the base plate 7, and a plurality of connecting holes 32 are provided on the lower side of the column 3. The connecting holes 32 are arranged one-to-one corresponding to the positioning holes 71. A placement groove 72 is provided on the lower side of the base plate 7, and the positioning holes 71 are communicated with the placement groove 72. A connecting bolt 8 is provided in the positioning hole 71, and the nut of the connecting bolt 8 is located in the placement groove 72, thereby reducing the contact between the nut of the connecting bolt 8 and the workbench. An internal thread that is compatible with the thread of the connecting bolt 8 is provided in the connecting hole 32. After the connecting bolt 8 is screwed into the connecting hole 32, a firm connection between the column 3 and the base plate 7 can be achieved.

[0087] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A steering wheel modal control method, characterized in that: The following steps are involved: S1: Select the first tooling and fix the first tooling on the workbench, and then fix the steering wheel on the first tooling; S2: arranging a first acceleration sensor in a first direction of the steering wheel, then hammering the steering wheel along the first direction, and recording a first transfer function displayed by the first acceleration sensor; S3: taking the peak value of the first transfer function as a steering wheel mode in a first direction; S4: removing the steering wheel from the first tooling; S5: Select the second tooling, fix the second tooling on the workbench, and then fix the pipe column on the second tooling; S6: arranging a second acceleration sensor in the first direction of the pipe string, then hammering the pipe string along the first direction, and recording a second transfer function displayed by the second acceleration sensor; S7: taking the peak value of the second transfer function as the string mode in the first direction; S8: fixing the steering wheel on the column, then arranging a third acceleration sensor in the first direction of the steering wheel, and finally hammering the steering wheel along the first direction, and recording a third transfer function displayed by the third acceleration sensor; S9: taking the peak of the third transfer function as the common constrained mode of the column and the steering wheel in the first direction.

2. The steering wheel modal control method according to claim 1, characterized in that: Set the length direction of the actual vehicle to the X direction, the width direction of the actual vehicle to the Y direction, and the height direction of the actual vehicle to the Z direction. The first direction is set to the X, Y and Z directions in sequence, and steps S2-S3 are repeated to measure the steering wheel modes in the X, Y and Z directions respectively; Repeat steps S6-S7 to measure the pipe string modes in the X, Y and Z directions respectively; Repeat steps S8-S9 to measure the common constraint modes of the column and the steering wheel in the X, Y and Z directions respectively.

3. A steering wheel modal control device, characterized in that: It comprises a first tool and a second tool, wherein the first tool is used for fixing and restraining a steering wheel, and the second tool is used for fixing and restraining a pipe column.

4. The steering wheel modal control device according to claim 3, characterized in that: The first tooling includes a fixing seat and a fixing bolt, wherein the fixing seat is used to be fixed on a workbench, a first fixing hole is penetrated through the fixing seat, a nut of the fixing bolt is located on the bottom side of the fixing seat, and a threaded section of the fixing bolt passes through the first fixing hole and is used to be threadedly connected to the steering wheel.

5. The steering wheel modal control device according to claim 4, characterized in that: The fixing seat is provided with a second fixing hole, and the second fixing hole is used for connecting the mounting bolts on the workbench.

6. The steering wheel modal control device according to claim 5, characterized in that: There are four second fixing holes, and the four second fixing holes are arranged around the first fixing hole.

7. The steering wheel modal control device according to claim 3, characterized in that: The second tooling includes a column for fixing on a workbench, wherein four columns are provided, and the four columns are respectively arranged at the four corners of a rectangle, and the four columns are opposite to each other in pairs, and sliders are installed on the sides of two opposite columns that are close to each other for lifting, and the four sliders respectively correspond to four mounting holes on the mounting bracket of the pipe column, and matching holes for aligning the mounting holes are opened on the sliders.

8. The steering wheel modal control device according to claim 7, characterized in that: The column is provided with a first waist hole, the slider is provided with a locking hole, a locking bolt is arranged in the locking hole, the locking bolt passes through the first waist hole and is threadedly connected with a locking nut.

9. The steering wheel modal control device according to claim 8, characterized in that: The locking hole is a second waist hole, and the first waist hole is perpendicular to the second waist hole.

10. The steering wheel modal control device according to claim 7, characterized in that: The second tooling also includes a fixing plate and a bottom plate, wherein the bottom plate is fixedly connected to the column, a third fixing hole for connecting the mounting bolts on the workbench is provided on the fixing plate, and a side of the fixing plate close to the workbench abuts against the bottom plate.

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