Seat vibration reduction system and control method thereof, seat and vehicle

Abstract

The present invention relates to the technical field of vehicle vibration reduction, and provides a seat vibration reduction system and a control method thereof, a seat and a vehicle, wherein the seat vibration reduction system includes a stiffness damping structure, a telescopic structure, a vibration sensor and a push-pull device; the stiffness damping structure includes: a damping rod and a spring; a seat cushion support plate includes a first link and a second link; the first end of the spring is connected to the first link, and the second end is connected to the second link; the first end of the damping rod is rotatably connected to a seat fixed base plate, and the second end is rotatably connected to the second link; the telescopic structure includes a third link and a fourth link that are cross-arranged and hinged to each other; the first end of the third link is rotatably connected to the second link, and the second end is slidably connected to the seat fixed base plate; the first end of the fourth link is rotatably connected to the seat cushion support plate, and the second end is rotatably connected to the seat fixed base plate; the push-pull device is connected to the second end of the third link, and can output a target push-pull force corresponding to the vibration signal of the vibration sensor to reduce seat vibration and improve comfort.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle vibration reduction, and in particular to a seat vibration reduction system and a control method thereof, a seat and a vehicle. Background Art

[0002] Seats are an essential component of vehicles, providing comfort for passengers. While driving or operating, vehicles inevitably generate vibrations, which are transmitted through the seats to the person sitting on them. Severe vibrations can cause discomfort. To improve seat comfort, vibration reduction is necessary. Therefore, how to reduce seat vibration is a critical issue currently under investigation in the automotive industry. Summary of the Invention

[0003] The present invention provides a seat vibration reduction system and a control method thereof, a seat and a vehicle, which are used to solve the problem of how to reduce seat vibration in the prior art and can achieve a good vibration reduction effect on the seat.

[0004] The present invention provides a seat vibration reduction system, comprising:

[0005] A stiffness damping structure; the stiffness damping structure comprises: a damping rod and a spring; the damping rod is tiltedly arranged between a seat fixing base and a seat cushion support plate; the seat cushion support plate comprises a first connecting rod and a second connecting rod; a first end of the spring is connected to the first connecting rod, and a second end is connected to the second connecting rod; a first end of the damping rod is rotatably connected to the seat fixing base, and a second end is rotatably connected to the second connecting rod;

[0006] Telescopic structure; the telescopic structure includes a third link and a fourth link that are cross-arranged and hinged to each other; the first end of the third link is rotatably connected to the second link, and the second end is slidably connected to the seat fixed base; the first end of the fourth link is rotatably connected to the seat cushion support plate, and the second end is rotatably connected to the seat fixed base;

[0007] A vibration sensor is provided on the seat fixing base;

[0008] The push-pull device is connected to the second end of the third connecting rod and can output a target push-pull force acting on the second end of the third connecting rod and corresponding to the vibration signal of the vibration sensor to reduce vibration of the seat.

[0009] According to a seat vibration reduction system provided by the present invention, the seat fixing base includes a fifth connecting rod, a first sliding groove and a second sliding groove;

[0010] The first end of the fifth connecting rod is located in the first sliding groove, and the second end is located in the second sliding groove. The fifth connecting rod can slide along the extension direction of the first sliding groove and the second sliding groove;

[0011] The push-pull device is connected to the fifth connecting rod, and the fifth connecting rod is connected to the second end of the third connecting rod.

[0012] According to a seat vibration reduction system provided by the present invention, the push-pull device adopts a stepping motor.

[0013] The present invention further provides a method for controlling a seat vibration reduction system as described above, comprising:

[0014] receiving a vibration signal at the seat fixing base plate under a current working condition collected by the vibration sensor;

[0015] determining vibration information after the vibration signal is transmitted to the seat cushion support plate under different push-pull forces based on the vibration transfer functions corresponding to different push-pull forces of the push-pull device;

[0016] determining a target push-pull force of the push-pull device according to the vibration information under different push-pull forces;

[0017] The seat is vibration-reduced by controlling the push-pull device to output the target push-pull force.

[0018] According to a control method for a seat vibration reduction system provided by the present invention, determining the target push-pull force of the push-pull device according to the vibration information under different push-pull forces includes:

[0019] The push-pull force with the smallest vibration represented by the corresponding vibration information among the different push-pull forces is used as the target push-pull force.

[0020] According to a control method for a seat vibration reduction system provided by the present invention, the vibration transfer function corresponding to each push-pull force includes vibration transfer functions in multiple directions; the vibration transfer functions corresponding to different push-pull forces of the push-pull device are used to determine vibration information after the vibration signal is transmitted to the seat cushion support plate under different push-pull forces, including:

[0021] Under each push-pull force, the vibration information under the push-pull force is determined as follows:

[0022] Performing a spectrum transformation on each direction of the vibration signal to obtain a frequency domain component in each direction; determining the vibration component of the vibration signal after transmission in each direction based on the frequency domain component in each direction and the corresponding vibration transfer function; and performing a weighted summation of the vibration components in each direction to obtain the vibration information.

[0023] According to a control method for a seat vibration reduction system provided by the present invention, the vibration transfer functions corresponding to different push and pull forces are obtained in the following manner:

[0024] Under each push-pull force, vibration signal samples at the seat cushion support plate and the seat fixed base plate under different working conditions are collected, and based on the vibration signal samples at the seat cushion support plate and the seat fixed base plate, a vibration transfer function corresponding to the push-pull force is generated.

[0025] According to a control method for a seat vibration reduction system provided by the present invention, the vibration information is a total weighted acceleration.

[0026] The present invention also provides a seat, comprising any one of the seat vibration reduction systems described above, or a method for executing any one of the seat vibration reduction systems described above.

[0027] The present invention also provides a vehicle comprising any one of the seats described above.

[0028] The seat vibration reduction system and control method thereof, seat and vehicle provided by the present invention are provided with a telescopic structure and a stiffness damping structure between a seat fixed base plate and a seat cushion support plate, wherein the seat cushion support plate includes a first link and a second link, and the stiffness damping structure includes a damping rod and a spring, wherein a first end of the spring is connected to the first link, and a second end of the spring is connected to the second link, the first end of the damping rod is rotatably connected to the seat fixed base plate, and the second end of the damping rod is rotatably connected to the second link, thereby realizing a stiffness damping structure with variable stiffness and damping, and the telescopic structure includes a third link and a fourth link cross-arranged and hinged to each other, the first end of the third link is rotatably connected to the second link, The second end is slidably connected to the seat fixed base plate, the first end of the fourth connecting rod is rotatably connected to the seat cushion support plate, and the second end of the fourth connecting rod is rotatably connected to the seat fixed base plate, thereby realizing extension and retraction. In this way, the telescopic structure can drive the seat cushion support plate to move up and down through extension and retraction and change the stiffness and damping of the stiffness damping structure. The vibration sensor can collect the vibration signal at the seat fixed base plate under the current working condition. Based on this, according to the vibration excitation of different working conditions, the push-pull device can output the corresponding target push-pull force to reduce the vibration of the seat, and adjust the vibration comfort of the seat in real time. The push-pull force adjustment range is large, the adjustment is more precise, and the degree of intelligence is higher, thereby greatly improving the vibration comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 This is one of the structural diagrams of the seat vibration reduction system provided by the present invention;

[0031] Figure 2 This is the second structural diagram of the seat vibration reduction system provided by the present invention;

[0032] Figure 3 This is the third structural diagram of the seat vibration reduction system provided by the present invention;

[0033] Figure 4 It is a simplified schematic diagram of the vibration system formed by the chair and human body provided by the present invention;

[0034] Figure 5 1 is a schematic diagram of a curve of the vibration transfer function corresponding to different push-pull forces provided by the present invention;

[0035] Figure 6 is a flow chart of a control method for a seat vibration reduction system provided by the present invention;

[0036] Figure 7 It is a structural schematic diagram of the electronic device provided by the present invention;

[0037] Reference numerals:

[0038] 110: controller; 120: stiffness damping structure; 130: seat fixing base;

[0039] 140: Seat cushion support plate; 150: Telescopic structure; 160: Vibration sensor;

[0040] 170: Push-pull device; 121: Damping rod; 122: Spring;

[0041] 131: fifth connecting rod; 132: first sliding groove; 133: second sliding groove;

[0042] 141: first connecting rod; 142: second connecting rod; 151: third connecting rod;

[0043] 152: Fourth link. DETAILED DESCRIPTION

[0044] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0045] The following combination Figures 1 to 5 The seat vibration reduction system of the present invention is described.

[0046] This embodiment provides a seat vibration reduction system, such as Figure 1 、 Figure 2 and Figure 3 Shown, including:

[0047] Stiffness and damping structure 120; Stiffness and damping structure 120 includes: a damping rod 121 and a spring 122; the damping rod 121 is tilted and arranged between the seat fixing base 130 and the seat cushion support plate 140; the seat cushion support plate 140 includes a first link 141 and a second link 142; a first end of the spring 122 is connected to the first link 141, and a second end is connected to the second link 142; the first end of the damping rod 121 is rotatably connected to the seat fixing base 130, and the second end is rotatably connected to the second link 142;

[0048] The telescopic structure 150 includes a third link 151 and a fourth link 152 that are cross-arranged and hinged to each other; a first end of the third link 151 is rotatably connected to the second link 142, and a second end is slidably connected to the seat fixing base 130; a first end of the fourth link 152 is rotatably connected to the seat cushion support plate 140, and a second end is rotatably connected to the seat fixing base 130;

[0049] A vibration sensor 160 is provided on the seat fixing base 130;

[0050] The push-pull device 170 is connected to the second end of the third link 151 and can output a target push-pull force acting on the second end of the third link 151 and corresponding to the vibration signal of the vibration sensor 160 to reduce vibration of the seat.

[0051] The seat vibration reduction system of this embodiment can be applied to seats of various vehicles, for example, seats of working machinery such as excavators, cranes, and loaders, and seats of family cars, etc.

[0052] In practical applications, the seat may include a seat fixing base plate 130 and a seat cushion support plate 140 . The seat fixing base plate 130 can fix the seat to the vehicle body, and the seat cushion support plate 140 can support a human body on the seat cushion.

[0053] The vibration transfer function (VTF) is an inherent structural characteristic of a vibration system, characterizing the relationship between the excitation source and the vibration response. Given the excitation source, the vibration response can be derived from the VTF and the excitation source. For a seat, the vibration response is primarily transmitted through the vehicle body system to the seat mounting base 130 via road and engine excitation. The vibration response on the seat mounting base 130 then serves as the excitation source for transmission to the seat cushion support plate 140 and the human body above it. Due to the diversity of road surface conditions and engine operating conditions, the excitation sources transmitted to the seat mounting base 130 vary significantly. Adjusting the seat's vibration damping system can improve seat vibration comfort.

[0054] In the seat vibration reduction system of this embodiment, a stiffness and damping structure 120 and a telescopic structure 150 are disposed between the seat fixed base plate 130 and the seat cushion support plate 140. The stiffness and damping structure 120 provides both stiffness and damping, while the telescopic structure 150 can move the seat cushion support plate 140 up and down by telescoping, thereby varying the stiffness and damping of the stiffness and damping structure 120, thereby reducing vibrations felt by the human body and achieving a vibration reduction effect. The stiffness and damping of the stiffness and damping structure 120 can vary in both the horizontal x and y directions and the vertical z direction.

[0055] A vibration sensor 160 may be provided on the seat fixing base 130. The vibration sensor 160 may sense a vibration signal from the vehicle body at the seat fixing base 130 and send the signal to the controller 110. The vibration sensor 160 may be a vibration acceleration sensor, a vibration displacement sensor, or the like.

[0056] A push-pull mechanism 170 can also be provided on the seat base 130. This mechanism can generate a push-pull force on the telescopic structure 150, which can include both thrust and tension. Exemplarily, this mechanism 170 utilizes a stepper motor. The push-pull force applied by the mechanism 170 to the telescopic structure 150 can change the telescopic state of the telescopic structure 150. This change in the telescopic state of the telescopic structure 150 causes the seat support plate 140 to move up and down, changing the stiffness and damping of the stiffness damping structure 120. Ultimately, this changes the vibration information transmitted to the seat support plate 140, thereby meeting the seat vibration reduction requirements under current operating conditions.

[0057] For the seat, the vibration signal from the vehicle body at the seat fixing base plate 130 is the excitation source, and the vibration information at the seat cushion support plate 140 is the vibration response. The magnitude of the push-pull force output by the push-pull device is different, the telescopic state of the telescopic structure 150 is different, the position of the seat cushion support plate 140 and the stiffness and damping of the stiffness damping structure 120 are also different, and accordingly, the vibration transfer function between the seat fixing base plate 130 and the seat cushion support plate 140 is also different. In practice, the vibration transfer function under different push-pull forces can be obtained in advance. For example, the different push-pull forces can be different levels of push-pull forces divided according to the magnitude of the push-pull forces, such as 5N, 10N, 15N, ..., and other different levels of push-pull forces.

[0058] The magnitude of the push-pull force applied by the push-pull device 170 to the telescopic structure 150 matches the requirements for seat vibration reduction under the current working conditions. Figure 2As shown, the seat vibration reduction system may also include a controller 110, which is connected to a vibration sensor 160 and a push-pull device 170. The controller 110 receives the vibration signal at the seat fixing base plate 130 under the current working condition collected by the vibration sensor 160, and based on the vibration transfer function corresponding to the different push-pull forces of the push-pull device 170, determines the vibration information after the vibration signal is transmitted to the cushion support plate 140 under different push-pull forces. Based on the vibration information under different push-pull forces, the target push-pull force of the push-pull device 170 is determined, and the seat vibration is reduced by controlling the push-pull device 170 to output the target push-pull force. Thus, the purpose of adjusting the vibration comfort of the seat is achieved. The target push-pull force refers to the push-pull force that matches the demand for seat vibration reduction under the current working condition.

[0059] In actual application, the damping rod 121 in the stiffness damping structure 120 is tilted and arranged between the seat fixing base 130 and the seat cushion support plate 140. The tilt angle of the damping rod 121 can change with the up and down movement of the seat cushion support plate 140. The spring 122 can expand and contract with the up and down movement of the seat cushion support plate 140, and the expansion and contraction direction of the spring 122 is different from the movement direction of the seat cushion support plate 140.

[0060] The damping rod 121 mainly provides variable damping. Therefore, the damping rod 121 can be tilted between the seat fixing base 130 and the cushion support plate 140. When the tilt angle of the damping rod 121 changes, the damping provided also changes, and the damping of the damping rod 121 in the x, y and z directions all changes.

[0061] Spring 122 primarily provides variable stiffness for vibration reduction. The direction of expansion and contraction of spring 122 differs from the direction of movement of seat support plate 140, allowing spring 122 to provide variable stiffness in a wider range of directions. For example, spring 122 can be horizontally arranged on seat support plate 140. Spring 122 expands and contracts as seat support plate 140 moves up and down, providing variable stiffness. The stiffness of spring 122 varies in the x, y, and z directions. There can be one or more springs 122, and the specific number can be set based on actual needs. Four coil springs are shown in the figure for illustration.

[0062] The push-pull device 170 changes the telescopic state of the telescopic structure 150 through push-pull force, causing the seat support plate 140 to move up and down, thereby changing the inclination angle of the damping rod 121 to produce a damping change, and changing the telescopic state of the spring 122 to produce a stiffness change.

[0063] In this way, the stiffness damping structure 120 in this embodiment provides variable damping by means of the damping rod 121 tiltedly arranged between the seat fixing base plate 130 and the seat cushion support plate 140, and provides variable stiffness by means of the spring 122 whose telescopic direction is different from the moving direction of the seat cushion support plate 140, thereby realizing a stiffness damping structure 120 with variable stiffness and damping, and achieving effective vibration reduction through a simple structure.

[0064] In practical applications, the seat support plate 140 may be provided with a first connecting rod 141 and a second connecting rod 142 for connecting the telescopic structure 150 and the stiffness damping structure 120. The first connecting rod 141 and the second connecting rod 142 may be provided side by side. The first connecting rod 141 is fixed to the seat support plate 140.

[0065] The second connecting rod 142 is not fixed to the seat cushion support plate 140 .

[0066] The telescopic structure 150 formed by the intersecting and hinged third and fourth links 151, 152 is also referred to as a fork arm structure due to their intersecting arrangement. The first end of the third link 151 is pivotally connected to the second link 142 and also to the seat cushion support plate 140. The first end of the fourth link 152 is pivotally connected to the seat cushion support plate 140, thereby connecting the telescopic structure 150 to the seat cushion support plate 140. The second end of the third link 151 is slidably connected to the seat fixed base 130, while the second end of the fourth link 152 is pivotally connected to the seat fixed base 130, thereby connecting the telescopic structure 150 to the seat fixed base 130. In practice, two telescopic structures 150 can be arranged in parallel to provide more stable support for the seat cushion support plate 140.

[0067] The first end of the damping rod 121 is rotatably connected to the seat mounting base 130, thereby connecting the stiffness damping structure 120 to the seat mounting base 130. The second end of the damping rod 121 is rotatably connected to the second connecting rod 142. The first end of the spring 122 is connected to the first connecting rod 141, and the second end is connected to the second connecting rod 142, thereby mounting the spring 122 on the seat cushion support plate 140. This effectively connects the stiffness damping structure 120 to the seat cushion support plate 140. The hook at the first end of the spring 122 can be hooked on the first connecting rod 141, and the hook at the second end can be hooked on the second connecting rod 142.

[0068] Based on this, when the seat cushion support plate 140 is subjected to a certain load, the second end of the third link 151 of the telescopic structure 150 slides on the seat fixed base plate 130, changing the telescopic state of the telescopic structure 150. The telescopic structure 150 drives the seat cushion support plate 140 to move downward, and the damping rod 121 is inclined at a certain angle relative to the vertical direction, and the friction force with the second link 142 drives the second link 142 to rotate, and the spring 122 hung on the second link 142 is also stretched, so that the stiffness and damping components generated by the stiffness damping structure 120 in the x, y and z directions change.

[0069] The second end of the third connecting rod 151 slides on the seat fixed base 130. The second end of the third connecting rod 151 is also referred to as the sliding end of the telescopic structure 150. In practice, the push-pull device 170 is connected to the sliding end of the telescopic structure 150. The push-pull force exerted by the push-pull device 170 on the sliding end of the telescopic structure 150 causes the sliding end of the telescopic structure 150 to slide on the seat fixed base 130, thereby adjusting the stiffness and damping of the stiffness and damping structure 120 and increasing or offsetting a portion of the load borne by the seat cushion support plate 140.

[0070] In this way, the stiffness and damping of the stiffness damping structure 120 are adjusted by applying different push-pull forces to the sliding end of the telescopic structure 150 through the push-pull device 170. The structure is simple, effective, and easy to implement.

[0071] In this embodiment, a telescopic structure 150 and a stiffness damping structure 120 are provided between the seat fixing base plate 130 and the seat cushion support plate 140, wherein the seat cushion support plate 140 includes a first link 141 and a second link 142, and the stiffness damping structure 120 includes: a damping rod 121 and a spring 122, wherein the first end of the spring 122 is connected to the first link 141, and the second end of the spring 122 is connected to the second link 142, the first end of the damping rod 121 is rotatably connected to the seat fixing base plate 130, and the second end of the damping rod 121 is rotatably connected to the second link 142, thereby realizing a stiffness damping structure 120 with variable stiffness and damping, and the telescopic structure 150 includes a third link 151 and a fourth link 152 which are cross-arranged and hinged to each other, and the first end of the third link 151 is connected to the first link 141 and the second end of the spring 122 is connected to the second link 142. The second connecting rod 142 is rotatably connected, and the second end is slidably connected to the seat fixed base 130. The first end of the fourth connecting rod 152 is rotatably connected to the seat cushion support plate 140, and the second end of the fourth connecting rod 152 is rotatably connected to the seat fixed base 130, thereby realizing telescopic extension. In this way, the telescopic structure 150 can drive the seat cushion support plate 140 to move up and down through telescopic extension and change the stiffness and damping of the stiffness damping structure 120. The vibration sensor 160 can collect the vibration signal at the seat fixed base 130 under the current working condition. Based on this, according to the vibration excitation of different working conditions, the push-pull device 170 can output the corresponding target push-pull force to reduce the vibration of the seat, and adjust the vibration comfort of the seat in real time. The push-pull force adjustment range is large, the adjustment is more precise, and the degree of intelligence is higher, thereby greatly improving the vibration comfort.

[0072] In an exemplary embodiment, as Figure 1 and Figure 3 As shown, the seat fixing base 130 includes a fifth connecting rod 131, a first sliding groove 132 and a second sliding groove 133;

[0073] The first end of the fifth connecting rod 131 is located in the first sliding groove 132, and the second end is located in the second sliding groove 133. The fifth connecting rod 131 can slide along the extending direction of the first sliding groove 132 and the second sliding groove 133;

[0074] The push-pull device 170 is connected to the fifth connecting rod 131 , and the fifth connecting rod 131 is connected to the second end of the third connecting rod 151 .

[0075] In actual application, a fifth link 131 for connecting the telescopic structure 150 can be provided on the seat fixing base 130, and a first slide groove 132 is provided at the first end of the fifth link 131, and a second slide groove 133 is provided at the second end. The fifth link 131 can slide along the extension direction of the first slide groove 132 and the second slide groove 133. The second end of the third link 151 is connected to the fifth link 131, and the push-pull device 170 is connected to the fifth link 131. In this way, the push-pull force of the push-pull device 170 can act on the second end of the third link 151 through the connected fifth link 131, that is, act on the sliding end of the telescopic structure 150.

[0076] The lengths of the first sliding groove 132 and the second sliding groove 133 can be set according to actual needs.

[0077] In practice, the second end of the third connecting rod 151 has a groove, and the fifth connecting rod 131 is located in the groove of the second end of the third connecting rod 151 , thereby achieving connection between the second end of the third connecting rod 151 and the fifth connecting rod 131 .

[0078] In this embodiment, the connection with the sliding end of the telescopic structure 150 is achieved through the fifth connecting rod 131, the first slide groove 132 and the second slide groove 133 on the seat fixing base 130. The push-pull device 170 applies different push-pull forces to the sliding end of the telescopic structure 150 through the fifth connecting rod 131, so that the sliding end of the telescopic structure 150 slides in the first slide groove 132 and the second slide groove 133. The adjustment range of the push-pull force is larger, and the improvement effect of the seat vibration comfort is more obvious.

[0079] It should be noted that there are various ways to achieve the aforementioned rotational connection, such as a connection via a rotating shaft. Regarding the fourth connecting rod 152, a groove may be provided at the first end of the fourth connecting rod 152, and a rotating shaft (not shown) may be provided on the seat support plate 140. The rotating shaft is disposed within the groove at the first end of the fourth connecting rod 152, thereby achieving a rotational connection between the first end of the fourth connecting rod 152 and the seat support plate 140.

[0080] In an exemplary embodiment, the target push-pull force of the push-pull device 170 is determined based on vibration information under different push-pull forces. Specifically, this may include: using the push-pull force with the minimum vibration represented by the corresponding vibration information among the different push-pull forces as the target push-pull force.

[0081] Under different push-pull forces, the smaller the vibration represented by the vibration information at the seat cushion support plate 140 obtained in combination with the vibration transfer function, the more comfortable it is for the human body on the seat. Therefore, in this embodiment, the push-pull force that can minimize the vibration at the seat cushion support plate 140 is used as the target push-pull force and applied to the telescopic structure 150, thereby achieving the best vibration reduction effect and further improving the comfort of the seat.

[0082] Of course, the push-pull force with the second smallest vibration represented by the vibration information may also be selected as the target push-pull force. During implementation, it is set according to actual needs so as to achieve a better vibration reduction effect.

[0083] In an exemplary embodiment, the vibration transfer function corresponding to each push-pull force includes vibration transfer functions in multiple directions. Based on the vibration transfer functions corresponding to different push-pull forces of the push-pull device 170, vibration information after the vibration signal under different push-pull forces is transmitted to the seat cushion support plate 140 is determined, including:

[0084] Under each push and pull force, the vibration information under push and pull force is determined as follows:

[0085] Perform spectrum transformation on each direction of the vibration signal to obtain the frequency domain component in each direction; based on the frequency domain component in each direction and the corresponding vibration transfer function, determine the vibration component after the vibration signal is transmitted in each direction, and perform weighted summation of the vibration components in each direction to obtain vibration information.

[0086] The seat and the human body can form a complex nonlinear vibration system, such as Figure 4 The simplified schematic diagram of the vibration system formed by the seat and human body is shown. Based on this, the vibration transfer function is related to the stiffness K and damping C of the seat vibration reduction system, namely:

[0087] T x (f) = F x (K,C)(1);

[0088] T y (f) = F y (K,C)(2);

[0089] T z (f) = F z (K,C)(3);

[0090] T x (f), T y (f), T z (f) Vibration transfer functions in the x, y, and z directions respectively.

[0091] In implementation, the vibration transfer function corresponding to each push-pull force may include vibration transfer functions in three directions: x, y, and z. The vibration transfer function in each direction is related to stiffness and damping.

[0092] Based on this, under each push-pull force, the spectrum of the vibration signal at the seat fixed base plate 130 in the x, y and z directions can be transformed to obtain the frequency domain components in each direction; based on the frequency domain components in each direction and the corresponding vibration transfer function, the vibration components of the vibration signal after transmission in each direction are determined, and the vibration components in each direction are weighted and summed to obtain vibration information.

[0093] The vibration signal can be obtained by a vibration acceleration sensor. In a method for evaluating seat vibration comfort, the vibration signals a in the x, y and z directions of the human body support position are collected. x (t), a y (t), a z (t), perform spectrum transformation on the vibration signal to obtain the frequency domain components a in the x, y and z directions x (f), a y (f), a z (f) Calculate the weighted acceleration A in the x, y, and z directions using the frequency domain weighting method x 、A y 、A z , where the horizontal vibration (x and y directions) uses W d Weighting method, the vibration in the vertical direction (z direction) is W k The weighting method is used to calculate the total weighted acceleration A at that position through directional weighting. Specifically:

[0094] A x =a x (f)*W d (4);

[0095] A y =a y (f)*W d (5);

[0096] A z =a z (f)*W k (6);

[0097] A=1.4*A x +1.4*A y +1.0*A z (7);

[0098] The total weighted acceleration is the final vibration information, and correspondingly, the weighted acceleration A in the x, y and z directions is x 、A y 、A z The smaller the total weighted acceleration, the smaller the vibration and the better the vibration reduction effect. Therefore, the push-pull force with the minimum total weighted acceleration can be used as the target push-pull force and applied to the telescopic structure 150 to achieve the best vibration reduction effect.

[0099] In this embodiment, for each push-pull force, vibration information is obtained by combining the vibration transfer functions in multiple directions. The vibration transfer situation in each direction can be comprehensively considered so that the final target push-pull force can meet the vibration reduction requirements in each direction, thereby improving the overall vibration reduction effect.

[0100] In an exemplary embodiment, the vibration transfer functions corresponding to different push and pull forces are obtained as follows:

[0101] Under each push-pull force, vibration signal samples at the seat cushion support plate 140 and the seat fixed base plate 130 under different working conditions are collected. Based on the vibration signal samples at the seat cushion support plate 140 and the seat fixed base plate 130, a vibration transfer function corresponding to the push-pull force is generated.

[0102] In practical applications, for complex vibration systems, the vibration transfer function can be calculated through testing. The calculation formula is as follows:

[0103]

[0104] Where resp(f) and input(f) are the spectrum of the vibration response and the spectrum of the excitation source, respectively.

[0105] Since the vibration transfer function is related to the stiffness K and damping C of the seat vibration reduction system, the vibration transfer function can be adjusted by adjusting the push-pull force of the push-pull device 170 applied to the sliding end of the telescopic structure 150 .

[0106] Under each push-pull force, the vibration sensor 160 collects vibration signal samples at the seat cushion support plate 140 as a vibration response, and collects vibration signal samples at the seat fixed base plate 130 as an excitation source. For each direction, the vibration transfer function corresponding to the push-pull force is obtained based on the ratio of the frequency domain components (i.e., frequency spectrum) of the vibration signal samples at the seat cushion support plate 140 and the vibration signal samples at the seat fixed base plate 130.

[0107] Taking one of the directions of x, y and z as an example, the magnitude of the push and pull force is set to n levels, and the vibration transfer function corresponding to each level of thrust is calibrated through testing. The vibration transfer function corresponding to the nth level of thrust and the vibration transfer function corresponding to each level of tension are shown. It represents the vibration transfer function corresponding to the tension of the nth level. Figure 5 , which shows the curve of the vibration transfer function T(f) corresponding to different push-pull forces.

[0108] After the calibration of the vibration transfer function is completed, the spectrum input of the excitation source within the time period T can be obtained in real time through the vibration sensor 160. x (f) input y (f) input z (f), combined with the weighted acceleration calculation formula, that is, formula (7), the weighted acceleration corresponding to each push-pull force is calculated. If the push-pull device 170 applies a thrust with a magnitude of n, the weighted acceleration at the seat support plate 140 is:

[0109]

[0110] Among them, input x (f) input y (f) input z (f) are the frequency spectra of the vibration signals, i.e., the excitation sources, in the x, y, and z directions at the seat fixing base 130 .

[0111] If the push-pull device 170 applies a pulling force, the corresponding weighted acceleration can be obtained by referring to the implementation method of applying a pushing force.

[0112] Finally, the push or pull force with the smallest weighted acceleration is used as the optimal push or pull force, that is, the target push or pull force, and the push-pull device 170 is controlled to output the target push or pull force, thereby achieving the purpose of adjusting the seat to the optimal vibration comfort in real time.

[0113] In this embodiment, the relationship between different push-pull forces and the vibration transfer function is calibrated through testing. Therefore, even in the case of a complex vibration system, the vibration transfer function corresponding to different push-pull forces can be obtained quickly and accurately.

[0114] The control method of the seat vibration reduction system provided by the present invention is described below. The control method of the seat vibration reduction system described below and the seat vibration reduction system described above can be referred to in correspondence with each other.

[0115] like Figure 6 As shown, this embodiment provides a method for controlling the seat vibration reduction system provided in any of the above embodiments, the method comprising:

[0116] Step 601: Receive a vibration signal at the seat fixing base plate 130 under the current working condition collected by the vibration sensor 160;

[0117] Step 602: Based on the vibration transfer functions corresponding to different push-pull forces of the push-pull device 170, determine the vibration information after the vibration signal under different push-pull forces is transmitted to the seat cushion support plate 140;

[0118] Step 603: Determine the target push-pull force of the push-pull device 170 based on the vibration information under different push-pull forces;

[0119] Step 604 : Control the push-pull device 170 to output a target push-pull force to reduce vibration of the seat.

[0120] The control method of the seat vibration reduction system provided in this embodiment can be applied to the seat vibration reduction system provided in any of the above embodiments, and the execution subject of the method can be a controller.

[0121] In an exemplary embodiment, determining the target push-pull force of the push-pull device 170 according to vibration information under different push-pull forces includes:

[0122] The push-pull force with the minimum vibration represented by the corresponding vibration information among different push-pull forces is used as the target push-pull force.

[0123] In an exemplary embodiment, the vibration transfer function corresponding to each push-pull force includes vibration transfer functions in multiple directions. Based on the vibration transfer functions corresponding to different push-pull forces of the push-pull device 170, vibration information after the vibration signal under different push-pull forces is transmitted to the seat cushion support plate 140 is determined, including:

[0124] Under each push and pull force, the vibration information under push and pull force is determined as follows:

[0125] Perform spectrum transformation on each direction of the vibration signal to obtain the frequency domain component in each direction; based on the frequency domain component in each direction and the corresponding vibration transfer function, determine the vibration component after the vibration signal is transmitted in each direction, and perform weighted summation of the vibration components in each direction to obtain vibration information.

[0126] In an exemplary embodiment, the vibration transfer functions corresponding to different push and pull forces are obtained as follows:

[0127] Under each push-pull force, vibration signal samples at the seat cushion support plate 140 and the seat fixed base plate 130 under different working conditions are collected. Based on the vibration signal samples at the seat cushion support plate 140 and the seat fixed base plate 130, a vibration transfer function corresponding to the push-pull force is generated.

[0128] In an exemplary embodiment, the vibration information is a total weighted acceleration.

[0129] The specific implementation method of the control method of the seat vibration reduction system provided in this embodiment can refer to the above embodiments of the seat vibration reduction system, and has the same beneficial effects, which will not be repeated here.

[0130] Figure 7 An example of a physical structure diagram of an electronic device is shown below. Figure 7As shown, the electronic device may include: a processor 710, a communication interface 720, a memory 730, and a communication bus 740. The processor 710, the communication interface 720, and the memory 730 communicate with each other via the communication bus 740. The processor 710 may call logic instructions in the memory 730 to execute a control method for a seat vibration reduction system, which includes:

[0131] receiving a vibration signal at the seat fixing base plate 130 under the current working condition collected by the vibration sensor 160;

[0132] Based on the vibration transfer functions corresponding to different push-pull forces of the push-pull device 170, the vibration information after the vibration signal under different push-pull forces is transmitted to the seat cushion support plate 140 is determined;

[0133] Determine the target push-pull force of the push-pull device 170 based on the vibration information under different push-pull forces;

[0134] The seat vibration is reduced by controlling the push-pull device 170 to output a target push-pull force.

[0135] In addition, the logic instructions in the above-mentioned memory 730 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0136] In another aspect, the present invention further provides a computer program product, comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions. When the program instructions are executed by a computer, the computer is capable of executing the control method for the seat vibration reduction system provided by the above methods, the method comprising:

[0137] receiving a vibration signal at the seat fixing base plate 130 under the current working condition collected by the vibration sensor 160;

[0138] Based on the vibration transfer functions corresponding to different push-pull forces of the push-pull device 170, the vibration information after the vibration signal under different push-pull forces is transmitted to the seat cushion support plate 140 is determined;

[0139] Determine the target push-pull force of the push-pull device 170 based on the vibration information under different push-pull forces;

[0140] The seat vibration is reduced by controlling the push-pull device 170 to output a target push-pull force.

[0141] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the computer program is implemented to perform the above-mentioned control method of the seat vibration reduction system, the method comprising:

[0142] receiving a vibration signal at the seat fixing base plate 130 under the current working condition collected by the vibration sensor 160;

[0143] Based on the vibration transfer functions corresponding to different push-pull forces of the push-pull device 170, the vibration information after the vibration signal under different push-pull forces is transmitted to the seat cushion support plate 140 is determined;

[0144] Determine the target push-pull force of the push-pull device 170 based on the vibration information under different push-pull forces;

[0145] The seat vibration is reduced by controlling the push-pull device 170 to output a target push-pull force.

[0146] The present invention also provides a seat, including the seat vibration reduction system provided in the above embodiments, or a control method for executing the seat vibration reduction system provided in the above embodiments, or including the electronic device provided in the above embodiments, or including the non-transitory computer-readable storage medium provided in the above embodiments, or including the computer program product provided in the above embodiments.

[0147] The present invention further provides a vehicle comprising the seats provided in the above embodiments. The vehicle may be an operating machine such as an excavator, a crane, or a loader, or may be a family car or a commercial vehicle.

[0148] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0149] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0150] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A seat vibration reduction system, characterized in that: include: Stiffness damping structure; The stiffness damping structure includes: a damping rod and a spring; the damping rod is tilted and arranged between a seat fixing base and a seat cushion support plate; the seat cushion support plate includes a first link and a second link; the first end of the spring is connected to the first link, and the second end is connected to the second link; the first end of the damping rod is rotatably connected to the seat fixing base, and the second end is rotatably connected to the second link, the first link is fixed to the seat cushion support plate, and the second link is not fixed to the seat cushion support plate; Telescopic structure; the telescopic structure includes a third link and a fourth link that are cross-arranged and hinged to each other; the first end of the third link is rotatably connected to the second link, and the second end is slidably connected to the seat fixed base; the first end of the fourth link is rotatably connected to the seat cushion support plate, and the second end is rotatably connected to the seat fixed base; A vibration sensor is provided on the seat fixing base; a push-pull device connected to the second end of the third connecting rod, capable of outputting a target push-pull force acting on the second end of the third connecting rod and corresponding to the vibration signal of the vibration sensor to reduce vibration of the seat, wherein the push-pull device adopts a stepping motor; In which, the seat fixing base includes a fifth link, a first slide groove and a second slide groove, the first end of the fifth link is located in the first slide groove, and the second end is located in the second slide groove, the fifth link can slide along the extension direction of the first slide groove and the second slide groove, the push-pull device is connected to the fifth link, and the fifth link is connected to the second end of the third link.

2. A control method for a seat vibration reduction system according to claim 1, characterized in that: include: receiving a vibration signal at the seat fixing base plate under a current working condition collected by the vibration sensor; determining vibration information after the vibration signal is transmitted to the seat cushion support plate under different push-pull forces based on the vibration transfer functions corresponding to different push-pull forces of the push-pull device; determining a target push-pull force of the push-pull device according to the vibration information under different push-pull forces; The seat is vibration-reduced by controlling the push-pull device to output the target push-pull force.

3. The control method of the seat vibration reduction system according to claim 2, characterized in that: The determining the target push-pull force of the push-pull device according to the vibration information under different push-pull forces includes: The push-pull force with the smallest vibration represented by the corresponding vibration information among the different push-pull forces is used as the target push-pull force.

4. The control method of the seat vibration reduction system according to claim 2, characterized in that: The vibration transfer function corresponding to each push-pull force includes vibration transfer functions in multiple directions; the vibration transfer functions corresponding to different push-pull forces of the push-pull device are used to determine vibration information after the vibration signal is transmitted to the seat cushion support plate under different push-pull forces, including: Under each push-pull force, the vibration information under the push-pull force is determined as follows: Performing a spectrum transformation on each direction of the vibration signal to obtain a frequency domain component in each direction; determining the vibration component of the vibration signal after transmission in each direction based on the frequency domain component in each direction and the corresponding vibration transfer function; and performing a weighted summation of the vibration components in each direction to obtain the vibration information.

5. The control method of a seat vibration reduction system according to any one of claims 2 to 4, characterized in that: The vibration transfer functions corresponding to the different push-pull forces are obtained in the following manner: Under each push-pull force, vibration signal samples at the seat cushion support plate and the seat fixed base plate under different working conditions are collected, and based on the vibration signal samples at the seat cushion support plate and the seat fixed base plate, a vibration transfer function corresponding to the push-pull force is generated.

6. The control method of the seat vibration reduction system according to claim 4, characterized in that: The vibration information is the total weighted acceleration.

7. A seat, characterized in that: The invention comprises the seat vibration reduction system according to claim 1 , or is used to execute the control method of the seat vibration reduction system according to any one of claims 2 to 6 .

8. A vehicle, characterized in that: Comprising the seat as claimed in claim 7.

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