vibration excitation device

Abstract

The present application provides a kind of exciting device (1), can be reproduced with simple structure in the vehicle driving state of exciting vibration.The exciting device (1) is generated in front and back direction by exciting actuator (12) vibration, is input to second pole (16) via exciting arm (13) and exciting shaft (14,14), makes four wheels (W) vibrate by the vibration of second pole (16), makes vehicle V rotate by at least one axis in yaw axis, pitch axis, roll axis.Control (40) controls the phase and amplitude of the action of four piston rods (12b) of four exciting actuators (12) respectively.

Description

TECHNICAL FIELD

[0001] The present application relates to a vibration device that vibrates a vehicle. BACKGROUND

[0002] In the past, as a vibration device, a device described in Patent Literature 1 is known. The vibration device is a device that vibrates a vehicle, includes a placement table that places a tire, the placement table is divided into a plurality of regions that can be displaced in a mutually independent manner, and includes a load transmission mechanism that independently transmits a load to the plurality of regions respectively.

[0003] [Related Art Literature]

[0004] [Patent Literature]

[0005] [Patent Literature 1] Japanese Patent Laid-Open No. 2005-300312 SUMMARY

[0006] [Problems to be Solved by the Invention]

[0007] In the vibration device described in Patent Literature 1, by dividing the placement table into a plurality of regions that can be displaced in a mutually independent manner, the reproduction accuracy of the actual road surface driving state is improved, but there is a problem that the structure is complicated.

[0008] The present application is made to solve the problem, and aims to provide a vibration device that can appropriately reproduce a vibration state in vehicle driving with a simple structure.

[0009] [Technical Means to Solve the Problem]

[0010] In order to achieve the object, the vibration device of the present application is a vibration device that vibrates an inspection vehicle having a plurality of wheels, including:

[0011] a plurality of vibration sections that are provided corresponding to the plurality of wheels respectively, and have a front rod that is configured in a manner that restricts movement of the wheel in a front direction by abutting against the wheel from the front direction of the wheel, a rear rod that can sandwich a lower side portion of the wheel between the front rod by abutting against the wheel from a rear direction of the wheel, and an actuator that vibrates the wheel by moving the front rod in a front-rear direction, and that support and vibrate the plurality of wheels respectively; and

[0012] a control section that controls the phase and amplitude of the action of each of the plurality of actuators by controlling the action of each of the plurality of actuators, thereby causing the inspection vehicle to rotate by at least one of a yaw axis, a pitch axis, and a roll axis.

[0013] The vibration exciting device according to the present application, the control section controls the actions of the plurality of actuators respectively, and controls the phases and amplitudes of the actions of the plurality of actuators respectively, thereby making the test vehicle turn through at least one of the yaw axis, the pitch axis, and the roll axis, and thus making it possible to appropriately reproduce a vibration state in a vehicle running by exciting vibration in one direction from the front direction of the front rod to the rear direction.

[0014] Preferably, the control section makes the plurality of actuators act respectively so that the actions of the plurality of actuators become substantially the same phase, thereby making the test vehicle turn through the pitch axis.

[0015] The vibration waveform obtained by adding the action waveforms of the plurality of actuators becomes large in amplitude in the case of the same phase. According to the structure, the plurality of actuators act respectively so that the actions of the plurality of actuators become substantially the same phase, and thus it is possible to reduce the amounts of the actions of the plurality of actuators, and to easily make the test vehicle turn through the pitch axis.

[0016] Preferably, the control section makes the plurality of actuators act respectively so that the amplitude differences of the actions of the plurality of actuators are within a prescribed range, thereby making the test vehicle turn through the pitch axis.

[0017] The vibration waveform obtained by adding the action waveforms of the plurality of actuators becomes large in amplitude in the case of the same amplitude. According to the structure, the plurality of actuators act respectively so that the amplitude differences of the actions of the plurality of actuators are within a prescribed range, and thus it is possible to reduce the amounts of the actions of the plurality of actuators, and to easily make the test vehicle turn through the pitch axis.

[0018] Preferably, the plurality of wheels are arranged in the left-right direction,

[0019] The control section makes the plurality of actuators act respectively so as to generate phase differences of the actions of the plurality of actuators corresponding to the wheels arranged in the left-right direction, thereby making the test vehicle turn through at least the yaw axis.

[0020] The vibration waveform obtained by adding the action waveforms of the plurality of actuators becomes large in amplitude in the case of generating the phase differences of the actions. According to the structure, the plurality of actuators act respectively so as to generate the phase differences of the actions of the plurality of actuators, and thus it is possible to reduce the amounts of the actions of the plurality of actuators, and to easily make the test vehicle turn through the yaw axis.

[0021] Preferably, the control section makes the plurality of actuators act respectively so that the actions of the plurality of actuators corresponding to the wheels arranged in the left-right direction become substantially opposite phases.

[0022] The vibration waveform obtained by adding the action waveforms of the plurality of actuators becomes largest in the case where the actions of the respective actuators are in opposite phases. According to the configuration, the plurality of actuators are caused to act so that the actions of the plurality of actuators are in approximately opposite phases, and thus the amount of action of each of the plurality of actuators can be reduced, and the test vehicle can be easily caused to turn by the yaw axis.

[0023] Preferably, the control section causes the plurality of actuators to act so that the amplitude difference of the actions of the plurality of actuators is within a prescribed range.

[0024] The vibration waveform obtained by adding the action waveforms of the plurality of actuators becomes larger in the case where the amplitudes are the same. According to the configuration, by setting the prescribed range to a value close to 0, and causing the plurality of actuators to act so that the amplitude difference of the actions of the plurality of actuators is within the prescribed range, the amount of action of each of the plurality of actuators can be reduced, and the test vehicle can be easily caused to turn by the yaw axis.

[0025] Preferably, the plurality of wheels are arranged in the left-right direction,

[0026] The control section causes the plurality of actuators to act so as to generate a phase difference of the actions of the plurality of actuators corresponding to the wheels arranged in the left-right direction, thereby causing the test vehicle to turn by at least the roll axis.

[0027] The vibration waveform obtained by adding the action waveforms of the plurality of actuators becomes larger in the case where a phase difference of the actions of the respective actuators is generated. According to the configuration, the plurality of actuators are caused to act so as to generate a phase difference of the actions of the plurality of actuators, and thus the amount of action of each of the plurality of actuators can be reduced, and the test vehicle can be easily caused to turn by the roll axis.

[0028] Preferably, the control section causes the plurality of actuators to act so that the actions of the plurality of actuators corresponding to the wheels arranged in the left-right direction are in approximately opposite phases.

[0029] The vibration waveform obtained by adding the action waveforms of the plurality of actuators becomes largest in the case where the actions of the respective actuators are in opposite phases. According to the configuration, the plurality of actuators are caused to act so that the actions of the plurality of actuators are in approximately opposite phases, and thus the amount of action of each of the plurality of actuators can be reduced, and the test vehicle can be easily caused to turn by the roll axis.

[0030] Preferably, the control section causes the plurality of actuators to act so that the amplitude difference of the actions of the plurality of actuators is within a prescribed range.

[0031] The vibration waveform obtained by adding the motion waveforms of the plurality of actuators becomes larger in amplitude in the case of the same amplitude. According to the configuration, by setting the prescribed range to a value close to 0 and causing the plurality of actuators to act respectively so that the amplitude difference of the motions of the plurality of actuators is within the prescribed range, it is possible to reduce the amount of motion of each of the plurality of actuators and easily cause the test vehicle to turn by the roll axis. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a perspective view showing the appearance of a vibration device according to an embodiment of the present application.

[0033] Figure 2 is a perspective view showing the structure of a front load plate portion and a vibration machine.

[0034] Figure 3 is a perspective view showing the structure of a vibration machine.

[0035] Figure 4 is a plan view showing the structure of a vibration machine.

[0036] Figure 5 is a view showing the cross section along the C-C line of Figure 4

[0037] Figure 6 is a view showing the state in which a vehicle is placed so as to be vibrated in a vibration device.

[0038] Figure 7 is a view showing the rotation state of a drive wheel.

[0039] Figure 8 is an explanatory view showing the pressing force acting on a wheel at the time of vibration and the components of the force.

[0040] Figure 9 is a graph of the motion waveforms of four vibration actuators at the time of pitch axis turning control.

[0041] Figure 10 is a plan view showing a vehicle turning in a yaw axis.

[0042] Figure 11 is a graph of the motion waveforms of four vibration actuators at the time of yaw axis turning control.

[0043] Figure 12 is a front view showing a vehicle turning in a roll axis.

[0044] Figure 13 is a graph of the motion waveforms of four vibration actuators at the time of roll axis turning control.

[0045] Figure 14 ​is a graph showing acceleration detected by the front end portion of the suspension arm.

[0046] [Explanation of symbols]

[0047] 1: excitation device

[0048] 10: excitation machine (excitation portion)

[0049] 12: excitation actuator

[0050] 16: second rod (front rod)

[0051] 17: first rod (rear rod)

[0052] 40: controller (control portion) DETAILED DESCRIPTION

[0053] Hereinafter, an excitation device 1 of an embodiment of the present application will be described with reference to the drawings. The excitation device 1 of the present embodiment is a device that excites a vehicle via wheels in order to inspect the vehicle, and four excitation machines 10 (only one of which is illustrated in the drawing) are provided in the excitation device 1. Figure 1 Figure 3

[0054] As described later, in the excitation device 1, four wheels W of a vehicle V as an inspection object are excited by the four excitation machines 10, respectively, whereby it is inspected whether or not an abnormal sound / noise or the like is generated in the vehicle V. Figure 5

[0055] The vehicle V of the present embodiment is a front-wheel drive vehicle type vehicle in which left and right front wheels W are drive wheels W, and is configured to generate a creep phenomenon due to a structure (torque converter) of an automatic transmission. Further, in the following description, a case where the drive wheels W rotate due to generation of the creep phenomenon will be referred to as "creep rotation".

[0056] Further, in the following description, for convenience, the A1 side of the arrows A1-A2 will be referred to as "front", the A2 side will be referred to as "rear", the B1 side of the arrows B1-B2 will be referred to as "right", the B2 side will be referred to as "left", the upper side will be referred to as "up", and the lower side will be referred to as "down". Figure 1

[0057] The excitation device 1 includes a placement table 2 for placing the vehicle V at the time of inspection, and the placement table 2 is provided on a floor F (refer to the drawing). Since the placement table 2 is configured to be face-symmetrical with respect to a left half portion and a right half portion, the left half portion will be described below as an example. Figure 5

[0058] ​​​​​The left half of the table 2 includes a table portion 4 extending in the front-rear direction, and front and rear inclined portions 3, 3 provided on the front and rear of the table portion 4. The surface of the front inclined portion 3 is a flat portion continuous with the front end of the table portion 4, and an inclined surface continuous with the flat portion and inclined toward the front and extending downward.

[0059] In addition, the surface of the rear inclined portion 3 is a flat portion continuous with the rear end of the table portion 4, and an inclined surface continuous with the flat portion and inclined toward the rear and extending downward. At the start of the inspection, the vehicle V moves from the ground to the table portion 4 via the rear inclined portion 3, and after the end of the inspection, moves from the table portion 4 to the ground via the front inclined portion 3.

[0060] On the other hand, the table portion 4 includes, in order from the upper side to the lower side, front and rear table plate portions 5, 6, a ceiling plate portion 7, and a base plate portion 8. The base plate portion 8 is a flat plate-shaped member extending in the front-rear direction, and the front and rear end portions thereof are integrally fixed to the front and rear inclined portions 3, 3. The base plate portion 8 is placed on the ground, and is firmly fixed to the ground F via a fixing member (not shown) such as an anchor bolt.

[0061] The ceiling plate portion 7 extends in the front-rear direction, and is arranged in parallel with the base plate portion 8. In addition, the front table plate portion 5 extends in the front-rear direction, and the front end portion thereof is placed on the flat portion of the front inclined portion 3, and a pair of long holes 5a, 5a are formed at both end portions thereof in the left-right direction. The front end portion of the front table plate portion 5 is fixed to the front inclined portion 3 via a hydraulic clamp device 9 at the edge portion of the long hole 5a.

[0062] In addition, the front inclined portion 3 is formed with a long hole 3a extending in the left-right direction, and the hydraulic clamp device 9 clamps the front table plate portion 5 and the front inclined portion 3 from the upper and lower directions in a state of being fitted to the long hole 5a of the front table plate portion 5 and the long hole 3a of the front inclined portion 3. Thus, the front table plate portion 5 is fixed to the front inclined portion 3.

[0063] An opening 5c is provided at the central portion of the front table plate portion 5. The opening 5c is formed in a rectangular shape in plan view, and penetrates the front table plate portion 5 in the upper and lower directions. A vibration generator 10 (see Fig. 2) is arranged below the opening 5c. Figure 3 Details of the vibration generator 10 will be described later.

[0064] Further, long holes 5b, 6b are formed at the rear end portion of the front table plate portion 5 and the front end portion of the rear table plate portion 6. A hydraulic clamp device 9A identical to the hydraulic clamp device 9 clamps the front table plate portion 5 and the rear table plate portion 6 in a state of being fitted to the long holes 5b, 6b, and thus the front table plate portion 5 and the rear table plate portion 6 are fixed to each other by the hydraulic clamp device 9A.

[0065] According to the above structure, the front placement plate portion 5 is movable in the left-right direction by an amount corresponding to the length of the long hole 3a in a state where the front placement plate portion 5 and the front inclined surface portion 3 are released from the fixation by the hydraulic clamp device 9, and thus the front placement plate portion 5 is configured to be movable in the left-right direction between a maximum width position shown in FIG. 6 and a minimum width position not shown. Figure 1 The front placement plate portion 5 is movable in the left-right direction by an amount corresponding to the length of the long hole 3a in a state where the front placement plate portion 5 and the front inclined surface portion 3 are released from the fixation by the hydraulic clamp device 9, and thus the front placement plate portion 5 is configured to be movable in the left-right direction between a maximum width position shown in FIG. 6 and a minimum width position not shown.

[0066] Further, the front placement plate portion 5 is relatively movable in the front-rear direction by an amount corresponding to the length of the long hole 5a and the long hole 5b in the front-rear direction in a state where the fixation by the hydraulic clamp device 9 and the hydraulic clamp device 9A is released. Specifically, the front placement plate portion 5 is configured to be movable in the front-rear direction between a maximum length position shown in FIG. 7 and a minimum length position not shown. Figure 1 The front placement plate portion 5 is movable in the left-right direction by an amount corresponding to the length of the long hole 3a in a state where the front placement plate portion 5 and the front inclined surface portion 3 are released from the fixation by the hydraulic clamp device 9, and thus the front placement plate portion 5 is configured to be movable in the left-right direction between a maximum width position shown in FIG. 6 and a minimum width position not shown.

[0067] On the other hand, the upper surface of the rear end portion of the rear placement plate portion 6 is arranged at the same height as the upper surface of the front end portion of the front placement plate portion 5, and is configured to be symmetric with the front end portion of the front placement plate portion 5. That is, the rear end portion of the rear placement plate portion 6 is placed on the planar portion of the rear inclined surface portion 3, and a pair of long holes 6a and 6a are formed at both end portions thereof in the left-right direction.

[0068] Further, the rear inclined surface portion 3 is also formed with a long hole 3a extending in the left-right direction, and the hydraulic clamp device 9 clamps the rear placement plate portion 6 and the rear inclined surface portion 3 from above and below in a state where the long hole 6a of the rear placement plate portion 6 and the long hole 3a of the rear inclined surface portion 3 are fitted. Thus, the rear placement plate portion 6 is fixed to the rear inclined surface portion 3.

[0069] Further, an opening 6c is provided at the central portion of the rear placement plate portion 6. The opening 6c is formed in a rectangular shape in plan view, penetrates the rear placement plate portion 6 in the up-down direction, and is configured to be the same size as the opening 5c of the front placement plate portion 5. In addition, the vibration generator 10 is arranged below the opening 6c.

[0070] According to the above structure, the rear placement plate portion 6 is movable in the left-right direction by an amount corresponding to the length of the long hole 3a in a state where the rear placement plate portion 6 and the rear inclined surface portion 3 are released from the fixation by the hydraulic clamp device 9, and thus the rear placement plate portion 6 is configured to be movable in the left-right direction between a maximum width position shown in FIG. 8 and a minimum width position not shown. Figure 1 The rear placement plate portion 6 is movable in the left-right direction by an amount corresponding to the length of the long hole 3a in a state where the rear placement plate portion 6 and the rear inclined surface portion 3 are released from the fixation by the hydraulic clamp device 9, and thus the rear placement plate portion 6 is configured to be movable in the left-right direction between a maximum width position shown in FIG. 8 and a minimum width position not shown.

[0071] Further, the rear placement plate portion 6 is relatively movable in the front-rear direction by an amount corresponding to the length of the long hole 6a and the long hole 6b in the front-rear direction in a state where the fixation by the hydraulic clamp device 9 and the hydraulic clamp device 9A is released. Specifically, the rear placement plate portion 6 is configured to be movable in the front-rear direction between a maximum length position shown in FIG. 9 and a minimum length position not shown. Figure 1The maximum length position shown moves in the front-back direction between the minimum length position (not shown).

[0072] Next, refer to Figures 2-8 The exciter 10 will be explained in detail below. Furthermore, for ease of understanding, Figure 2 The structure with the top plate 7 omitted is shown. In the excitation device 1 of this embodiment, the exciter 10 disposed below the opening 5c ​​of the front mounting plate 5 is configured in the same way as the exciter 10 disposed below the opening 6c of the rear mounting plate 6. Therefore, the following description will take the exciter 10 disposed below the opening 5c ​​of the front mounting plate 5 as an example.

[0073] The vibrator 10 is mounted on a movable base plate 11 that is rectangular in top view. The movable base plate 11 is fixed to the base plate 8 by a magnetic clamp (not shown) in a state where its bottom surface is in surface contact with the upper surface of the base plate portion 8.

[0074] In addition, four position changing devices 30 and multiple free bearings (not shown) are provided on the upper surface of the base plate 8. The four position changing devices 30 are arranged in a rectangular shape when viewed from above, and the movable base plate 11 is arranged in such a way that it is surrounded by these position changing devices 30.

[0075] Each position adjustment device 30 includes multiple synchronous pulleys, a synchronous belt wound around these pulleys, and a motor mechanism driving one of the pulleys (all not shown). The two ends of the synchronous belt of each position adjustment device 30 are connected to four designated locations on the movable base plate 11. Additionally, multiple free bearings are positioned below the movable base plate 11.

[0076] Based on the above structure, when the magnetic clamp is released, the movable base plate 11 rotates on multiple free bearings and moves on the base plate portion 8, accompanied by the rotation of the synchronous pulleys in the four position changing devices 30. That is, the movable base plate 11 is configured such that its relative position to the base plate portion 8 can be changed. Furthermore, in this changed position, the movable base plate 11 is fixed to the base plate portion 8 by the magnetic clamp.

[0077] like Figures 3-5 As shown, the vibrator 10 includes a vibration actuator 12; a vibration arm 13; a pair of vibration shafts 14, 14; a pair of hydrostatic bearings 15, 15; a second rod 16; a first rod 17; and a passageway 18, etc. Furthermore, in Figure 5 For ease of understanding, the shadow lines of the cross-sectional portions of the second rod 16 and the first rod 17 have been omitted.

[0078] The excitation actuator 12 includes a hydraulic cylinder 12a, a piston rod 12b, a bracket 12c, a hydraulic control circuit mechanism 12d, and the like. The hydraulic cylinder 12a is fixed and supported on the movable base plate 11 and the front load plate portion 5 via the bracket 12c.

[0079] The hydraulic control circuit mechanism 12d is connected to the hydraulic cylinder 12a. By supplying hydraulic pressure from the hydraulic control circuit mechanism 12d, the hydraulic cylinder 12a drives the piston rod 12b in the front-rear direction.

[0080] The hydraulic control circuit mechanism 12d is a mechanism that combines an electromagnetic slide valve mechanism and a hydraulic circuit, and the like, and is electrically connected to the controller 40 (refer to Figure 4 ) described later. In the hydraulic control circuit mechanism 12d, the hydraulic pressure supplied to the hydraulic cylinder 12a is controlled by controlling the electromagnetic slide valve mechanism with the controller 40. Thus, by controlling the moving state and the reciprocating state of the piston rod 12b, the operating state of the second rod 16 is controlled.

[0081] The controller 40 includes a microcomputer including a Central Processing Unit (CPU), a Random Access Memory (RAM), a Read Only Memory (ROM), an Input / Output (I / O) interface (all not shown), and the like, and executes an excitation control process.

[0082] The controller 40 executes an excitation control process for exciting the vehicle V via the four wheels W by controlling the four excitation actuators 12.

[0083] The controller 40 is connected to a memory 42 in which various operation control data for operating the excitation actuators 12 is stored, and reads the various operation control data stored in the memory 42 to operate the excitation actuators 12.

[0084] In the memory 42, as the operation control data, pitch axis rotation operation control data for rotating the vehicle V about a pitch axis (an axis extending in the left-right direction), yaw axis rotation operation control data for rotating the vehicle V about a yaw axis (an axis extending in the up-down direction), and roll axis rotation operation control data for rotating the vehicle V about a roll axis (an axis extending in the front-rear direction) are stored.

[0085] Each of the operation control data is data for controlling the phase and the amplitude of the operation of each of the four excitation actuators 12 (the operation of the four piston rods 12b). For example, as described in detail later, it is data for making the operations of the four piston rods 12b have the same phase and the same amplitude.

[0086] A vibration arm 13 is connected to the front end portion of the piston rod 12b of the vibration actuator 12, whereby the vibration arm 13 is configured to be driven / vibrated in the front-rear direction via the piston rod 12b.

[0087] The left and right end portions of the vibration arm 13 are connected to the front end portions of the vibration shafts 14 via ball joints 14a, respectively. These vibration shafts 14 are arranged at intervals in the left-right direction and extend in the front-rear direction in parallel to each other at a prescribed length. The vibration shafts 14 are rod-shaped members with a circular cross section and are supported so as to be slidable in the front-rear direction by static pressure bearings 15.

[0088] Recesses (not shown) are arranged and disposed at prescribed intervals in the front-rear direction on the inner circumferential surfaces of the static pressure bearings 15, and the vibration shafts 14 are supported so as to be slidable by the hydraulic pressure generated by these recesses. The upper surfaces of the static pressure bearings 15 are fixed to the front placement plate portion 5, and the lower surfaces are fixed to the movable base plate 11.

[0089] In addition, the rear end portions of the vibration shafts 14 are formed as two shaft mounting portions 20, 20, and the second rod 16 is provided between these shaft mounting portions 20, 20. Further, a pair of shaft mounting portions 21, 21 are provided rearward of the second rod 16, and the first rod 17 is provided between these shaft mounting portions 21, 21. In addition, in the present embodiment, the first rod 17 corresponds to a rear rod, and the second rod 16 corresponds to a front rod.

[0090] In addition, in the operation of the vibrator 10, the second rod 16 is driven at least between a vibration position (for example, the position shown in FIG. 1) and an ejection position (not shown) by the vibration actuator 12. Further, the vibration in the front-rear direction generated by the vibration actuator 12 is input to the second rod 16 via the vibration arm 13 and the vibration shafts 14. Figure 5

[0091] Further, the passage stage 18 is disposed between the static pressure bearings 15 on the movable base plate 11 and is provided with a hydraulic actuator (not shown) therein. The passage stage 18 is driven at least in the front-rear direction between a retreat position (for example, the position shown in FIG. 1) and an abutting position (not shown) at which the second rod 16 in the state of being in the ejection position abuts, by the hydraulic actuator. Figure 5

[0092] ​​When the passage platform 18 moves to the contact position and contacts the second lever 16 in the push-out position, the second lever 16 is held in a non-rotating state by the passage platform 18. This is because, after the excitation operation ends, when the wheel W of the vehicle V moves forward while passing over the second lever 16, keeping the second lever 16 in a stopped state allows the driving force of the wheel W to be transmitted to the second lever 16, making it easier for the wheel W to move forward.

[0093] The left half of the mounting platform 2 is constructed as described above, and the right half of the mounting platform 2 is constructed in the same way.

[0094] Next, the operation of inspecting vehicle V in the vibration device 1 configured as described above will be explained. First, the hydraulic clamp device 9, the hydraulic clamp device 9A and the magnetic clamp are released, and the two front mounting plate parts 5, the two rear mounting plate parts 6 and the four movable base plates 11 are set to a movable state.

[0095] Next, the four movable base plates 11 are moved to positions corresponding to the wheelbase and tire surface of the vehicle V being inspected via four position changing devices 30, and then fixed to the base plate portion 8 by magnetic clamps. Along with the movement of the movable base plates 11, the two front mounting plate portions 5 and the two rear mounting plate portions 6 are moved together with the movable base plates 11 to positions corresponding to the wheelbase and tire surface. Then, at these positions, the front mounting plate portions 5 and the rear mounting plate portions 6 are fixed to each other via hydraulic clamping device 9A, and simultaneously fixed to the front and rear inclined portions 3, 3 via hydraulic clamping device 9.

[0096] Next, the excitation actuators 12 of each vibrator 10 are driven, and the interval between the first rod 17 and the second rod 16 is set to a value consistent with the size of the wheel W of the vehicle V to be inspected. Based on the above, the preparatory actions for inspection are completed.

[0097] Next, move vehicle V so that it opens from the rear ramp 3 onto the loading platform 2, as shown. Figure 6 As shown, the four wheels W are inserted into the openings 5c of the front mounting plate 5 and 6c of the rear mounting plate 6 and move downward, becoming clamped by the first rod 17 and the second rod 16 from the front and rear directions.

[0098] In this state, the vibration control process is performed by the controller 40, such as... Figure 7 As indicated by arrow Y1, the second rod 16 is excited in the front-rear direction by the excitation actuator 12, and the wheel W is excited accordingly. During the excitation process, when the pressing force Fo of the second rod 16 acts on the wheel W, as shown... Figure 8As shown, two component forces of the pressing force Fo, Fx, Fy, act on the wheel W. That is, by exciting the second rod 16 in the front-rear direction, the wheel W is simultaneously excited in the front-rear direction and the up-down direction.

[0099] [Pitch axis rotation control]

[0100] Next, control when the vehicle V is rotated by a pitch axis (an axis extending in the left-right direction) will be described. In the present embodiment, the pitch axis is, for example, an axis extending in the left-right direction from the center of gravity position of the vehicle.

[0101] The controller 40 reads pitch axis rotation motion control data for rotating the vehicle V by a pitch axis from the memory 42. The pitch axis rotation motion control data is data for causing the plurality of excitation actuators 12 to act so that the piston rods 12b of the four excitation actuators 12 each move in the front-rear direction with phases and amplitudes as shown in the drawing. Figure 9 The controller 40 controls the phases and amplitudes of the piston rods 12b by controlling the amount of hydraulic pressure supplied from the hydraulic control circuit mechanism 12d.

[0102] Specifically, according to an actuation command (signal) from the controller 40, hydraulic pressure is supplied from the hydraulic control circuit mechanism 12d, and by this hydraulic pressure supply, the hydraulic cylinder 12a moves the piston rod 12b in the front-rear direction. The controller 40 controls the phases and amplitudes of the piston rods 12b by controlling the amount of hydraulic pressure supplied from the hydraulic control circuit mechanism 12d.

[0103] In the present embodiment, as shown in the drawing, the controller 40 controls the four piston rods 12b so that they move in the front-rear direction with the same phase and the same amplitude. That is, the controller 40 controls the phases and amplitudes of the actuation (the actions of the four piston rods 12b) of the four excitation actuators 12 each. Figure 9

[0104] In addition, in the pitch axis rotation control, control is performed in such a manner that the vehicle V is vibrated at a frequency near the resonance frequency (for example, around 2 Hz) of the pitch axis rotation of the vehicle V.

[0105] By this control, the vibrations in the front-rear direction generated by the excitation actuators 12 are input to the second rod 16 via the excitation arm 13 and the excitation shaft 14, the excitation shaft 14, and by the vibration of the second rod 16, vibrations with the same phase and the same amplitude are applied to the four wheels W, and thus the vehicle V is rotated by the pitch axis (see Figure 6 ).

[0106] The excitation waveform obtained by adding the action waveforms of the four piston rods 12b becomes large in amplitude in the case of the same phase. In the control, the four piston rods 12b are controlled so as to move in the front-rear direction with the same phase and the same amplitude, and thus it is possible to reduce the amount of action of the four piston rods 12b each, and it is possible to easily rotate the vehicle V by the pitch axis.​

[0107] [Yaw axis rotation control]

[0108] Next, control when the vehicle V is made to pass through yaw axis rotation (axis extending in the up-down direction) is described. In the present embodiment, the pitch axis is, for example, an axis extending in the up-down direction from the center of gravity position of the vehicle. Figure 10

[0109] The controller 40 reads yaw axis rotation motion control data that makes the vehicle V pass through yaw axis rotation from the memory 42. The yaw axis rotation motion control data is data that makes the plurality of excitation actuators 12 act so that the piston rods 12b of the four excitation actuators 12 each move in the front-rear direction at the phase and amplitude shown in FIG. 6. Figure 11

[0110] In the present embodiment, the piston rod 12b of the right front excitation actuator 12 and the piston rod 12b of the left front excitation actuator 12 are controlled to move in the front-rear direction at opposite phases and the same amplitude.

[0111] In addition, in the yaw axis rotation control, control is performed so as to vibrate at a frequency near the resonance frequency (for example, around 15 Hz) of the yaw axis rotation of the vehicle V. Therefore, in the yaw axis rotation control, the four piston rods 12b act at a frequency shorter period than the four piston rods 12b act in the pitch axis rotation control shown in FIG. 5. Figure 9 Figure 11

[0112] In addition, the controller 40 controls the piston rod 12b of the right rear excitation actuator 12 to move in the front-rear direction at the same phase and the same amplitude as the piston rod 12b of the right front excitation actuator 12, and controls the piston rod 12b of the left rear excitation actuator 12 to move in the front-rear direction at the same phase and the same amplitude as the piston rod 12b of the left front excitation actuator 12b.

[0113] Thus, the controller 40 controls the piston rod 12b of the right rear excitation actuator 12 and the piston rod 12b of the left rear excitation actuator 12 to move in the front-rear direction at opposite phases and the same amplitude. That is, the controller 40 controls the phase and amplitude of the act of each of the four excitation actuators 12 (the act of the four piston rods 12b).

[0114] ​​​​By this control, the vibrations in the front-rear direction generated by the excitation actuators 12 are input to the second shaft 16 via the excitation arm 13 and the excitation shaft 14, the excitation shaft 14, and the vibrations of the second shaft 16 impart the same phase and the same amplitude of vibrations to the right front wheel W and the right rear wheel W, and impart the opposite phase and the same amplitude of vibrations to the left front wheel W and the left rear wheel W, and impart the same phase and the same amplitude of vibrations to the four wheels W, whereby the vehicle V is turned by the yaw axis (refer to Figure 10 ).

[0115] The excitation waveform obtained by adding the motion waveforms of the four piston rods 12b is large in amplitude in the case where the phases are opposite in the left-right direction. In the control, the four piston rods 12b are controlled to move in the front-rear direction in opposite phases and the same amplitude in the left-right direction, and thus it is possible to reduce the motion amount of each of the four piston rods 12b, and it is possible to easily turn the vehicle V by the yaw axis.

[0116] [Roll axis turning control]

[0117] Next, the control when the vehicle V is turned by the roll axis (an axis extending in the front-rear direction) as shown in FIG. 6 will be described. In the present embodiment, the roll axis is, for example, an axis extending in the front-rear direction from the center of gravity of the vehicle. Figure 12 The controller 40 reads roll axis turning motion control data for turning the vehicle V by the roll axis from the memory 42. The roll axis turning motion control data is data for causing the plurality of excitation actuators 12 to move so that the piston rods 12b of the four excitation actuators 12 move in the front-rear direction in the phases and the amplitudes shown in FIG. 6.

[0118] Figure 13 In the present embodiment, the piston rod 12b of the right front excitation actuator 12 is controlled to move in the front-rear direction in opposite phases and the same amplitude as the piston rod 12b of the left front excitation actuator 12. In addition, the control is performed so as to vibrate at a frequency near the resonance frequency (for example, about 0.5 Hz) at which the vehicle V turns by the roll axis.

[0119] In addition, the piston rod 12b of the right rear excitation actuator 12 is controlled to move in the front-rear direction in the same phase and the same amplitude as the piston rod 12b of the right front excitation actuator 12, and the piston rod 12b of the left rear excitation actuator 12 is controlled to move in the front-rear direction in the same phase and the same amplitude as the piston rod 12b of the left front excitation actuator 12.

[0120] In addition, the piston rod 12b of the right rear excitation actuator 12 is controlled to move in the front-rear direction in the same phase and the same amplitude as the piston rod 12b of the right front excitation actuator 12, and the piston rod 12b of the left rear excitation actuator 12 is controlled to move in the front-rear direction in the same phase and the same amplitude as the piston rod 12b of the left front excitation actuator 12.

[0121] ​Thus, the controller 40 controls the right rear exciter actuator 12 so that the piston rod 12b moves in the front-rear direction in the same phase and with the same amplitude as the piston rod 12b of the left rear exciter actuator 12. That is, the controller 40 controls the phase and amplitude of the motion of each of the four exciter actuators 12 (the motion of the four piston rods 12b).

[0122] By this control, the vibration in the front-rear direction generated by the exciter actuators 12 is input to the second shaft 16 via the excitation arm 13 and the excitation shaft 14, the excitation shaft 14, and the vibration of the second shaft 16 applies the same phase and the same amplitude of vibration to the right front wheel W and the right rear wheel W, and applies the opposite phase and the same amplitude of vibration to the left front wheel W and the left rear wheel W, and applies the same phase and the same amplitude of vibration to the four wheels W, thereby the vehicle V is rotated by the roll axis (refer to Figure 12 ).

[0123] The excitation waveform obtained by adding the motion waveforms of the four piston rods 12b becomes large in amplitude in the case of opposite phases in the left-right direction. In the control, the four piston rods 12b are controlled to move in the front-rear direction in opposite phases and with the same amplitude, so the amount of motion of each of the four piston rods 12b can be reduced, and the vehicle V can be easily rotated by the roll axis.

[0124] In addition, the controller 40 changes the phase and amplitude and performs the pitch axis rotation control, the yaw axis rotation control, and the roll axis rotation control a plurality of times. At this time, an abnormal sound in the vehicle V is checked, and in the case where an abnormal sound is generated in the vehicle V, the control content (phase and amplitude) and the position where the abnormal sound is generated (for example, the center portion of the instrument panel) are recorded.

[0125] Also, when performing a vibration check of another vehicle V in the same vehicle type, the control content (phase and amplitude) when an abnormal sound is generated in the instrument panel is used to perform a vibration check. Thus, it can be easily confirmed whether an abnormal sound is generated at a position where an abnormal sound is intended to be checked in advance.

[0126] When performing the check, a damper acceleration sensor can be provided at the front end (upper end) portion of the suspension arm, the spring, the damper, and the suspension supporting each of the left and right front axles of the vehicle V (the front end (upper end) portion of the damper), and further, an arm acceleration sensor can be provided at the rear portion of each of the left and right suspension arms, and the acceleration (X direction, Y direction, Z direction) at the time of the check is detected by each acceleration sensor. Figure 14 The acceleration detection results are shown in Table 1.

[0127] Thus, by simultaneously monitoring the movement of the suspension under the spring (the movement of the four piston rods 12b) and the movement of the spring (the detected acceleration detected by the acceleration sensor), the movement at the time of various road surface vibration inputs can be monitored three-dimensionally. Thus, it is possible to effectively use in the design of the attenuation characteristics based on the degree of influence of the vibration transmission path, the damper characteristics, and the bushing characteristics.

[0128] Further, in the embodiment, the four piston rods 12b are caused to move with the same amplitude in the case where the pitch axis rotation control, the yaw axis rotation control, and the roll axis rotation control are performed, but the amplitude of the movement can not be the same as long as the difference in the amplitude of the movement is within a prescribed range, and the prescribed range is preferably close to 0.

[0129] Further, in the embodiment, the left and right piston rods 12b are caused to move in opposite phases in the case where the yaw axis rotation control and the roll axis rotation control are performed, but the left and right piston rods 12b can not be caused to move in opposite phases as long as the left and right piston rods 12b are caused to move so as to produce a phase difference in the movement of the left and right piston rods 12b, respectively. For example, if the phase of the movement of the left and right piston rods 12b is shifted by, for example, 90°, the pitch axis rotation and the roll axis rotation occur at the same time.

[0130] In the embodiment, the four piston rods 12b are caused to move in the same phase or opposite phases, but the phase can not be the same as long as the phase difference is produced in the manner of substantially the same phase or substantially opposite phase.

[0131] In the embodiment, a four-wheeled vehicle type vehicle is used as the vehicle V, but instead, a two-wheeled vehicle to a three-wheeled vehicle or a vehicle having six or more wheels can be used.

Claims

1. A vibration exciting device that excites a test vehicle having a plurality of wheels, the vibration exciting device characterized by comprising: a plurality of vibration exciting portions that are provided corresponding to the plurality of wheels, respectively, and that have a front rod, a rear rod, and an actuator, and that support and excite the plurality of wheels, the front rod is configured to restrict the wheels from moving in a front direction by abutting against the wheels from the front direction of the wheels, the rear rod is capable of sandwiching a lower side portion of the wheels between the front rod by abutting against the wheels from a rear direction of the wheels, and the actuator excites the wheels by moving the front rod in a front-rear direction; a control portion that controls a phase and an amplitude of an action of each of the plurality of actuators by controlling the action of each of the plurality of actuators, and that causes the test vehicle to rotate through at least one of a yaw axis, a pitch axis, and a roll axis; and an acceleration sensor that detects an acceleration of a spring of a suspension of the test vehicle, an activity under the spring is monitored by the action of the actuators, and an activity on the spring is monitored by the detected acceleration, the acceleration sensor includes: a first acceleration sensor that is provided on a damper of the suspension; and a second acceleration sensor that is provided on a suspension arm of the suspension.

2. The vibration exciting device according to claim 1, wherein the control portion causes the plurality of actuators to act, respectively, so that the actions of the plurality of actuators become substantially the same phase, and causes the test vehicle to rotate through the pitch axis.

3. The vibration exciting device according to claim 2, wherein the control portion causes the plurality of actuators to act, respectively, so that an amplitude difference of the actions of the plurality of actuators is within a prescribed range, and causes the test vehicle to rotate through the pitch axis.

4. The vibration exciting device according to any one of claims 1 to 3, wherein the plurality of wheels are arranged in a left-right direction, the control portion causes the plurality of actuators to act, respectively, so that a phase difference of the actions of the plurality of actuators corresponding to the wheels arranged in the left-right direction is generated, and causes the test vehicle to rotate through at least the yaw axis.

5. The vibration exciting device according to claim 4, wherein the control portion causes the plurality of actuators to act, respectively, so that the actions of the plurality of actuators corresponding to the wheels arranged in the left-right direction become substantially opposite phases.

6. The vibration exciting device according to any one of claims 1 to 3, wherein the plurality of wheels are arranged in a left-right direction, the control portion causes the plurality of actuators to act, respectively, so that a phase difference of the actions of the plurality of actuators corresponding to the wheels arranged in the left-right direction is generated, and causes the test vehicle to rotate through at least the roll axis.

7. The vibration exciting device according to claim 6, wherein ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The control section causes the plurality of actuators to actuate respectively so that the actuation of the plurality of actuators corresponding to the wheel pairs arranged in the left-right direction becomes substantially opposite phases. The control section causes the plurality of actuators to actuate respectively so that the actuation of the plurality of actuators corresponding to the wheel pairs arranged in the left-right direction becomes substantially opposite phases.

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