A channel scaling method for impact response of chest of automobile crash dummy

Abstract

The present invention relates to the field of automobile collision safety testing, and in particular, to a method for scaling the impact response channel of the chest of an automobile collision dummy. The method comprises: obtaining the chest mass of the automobile collision dummy and the scaling coefficients in each direction; constructing a collision system and determining the working condition parameters; determining the relationship between the mechanical parameters and the working condition parameters according to the collision system; the mechanical parameters include inertial force F and chest compression D; determining the scaling coefficient of the mechanical parameters according to the scaling coefficient and the relationship; determining the chest impact response channel of the target dummy according to the scaling coefficient of the mechanical parameters, the basic vital sign parameter values ​​of the reference dummy, the basic vital sign parameter values ​​of the target dummy and the chest impact response channel of the reference dummy. The method takes into account the influence of stiffness and viscosity on the chest impact response, and can be used in the development of the chest of a Chinese vital sign dummy to improve the accuracy of the biological fidelity of the dummy chest.

Description

Technical Field

[0001] The invention relates to the field of automobile collision safety testing, and in particular to a method for scaling an automobile collision dummy chest impact response channel. Background Art

[0002] Automobile collision dummies are important testing tools that replace real human bodies and are used to evaluate automobile safety. However, the geometric features of collision dummies used in China are all European and American collision dummies with physical characteristics that are quite different from those of Chinese people. Therefore, the development of collision dummies with Chinese physical characteristics is crucial to improving automobile safety testing.

[0003] In the development process of the chest structure of the Chinese physical sign dummy, calibration test is an important verification link, among which the chest impact response channel is the key to evaluating the accuracy of the biological fidelity of the dummy's chest. The response limits and channels currently used in the dummy are determined based on the European and American physical sign cadaver experimental data. These data are quite different from the Chinese physical signs and cannot be directly used to scientifically and accurately evaluate the fidelity of the Chinese chest.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a channel scaling method for the impact response of the chest of an automobile collision dummy. The method takes into account the influence of stiffness and viscosity on the impact response of the chest and can be used in the development of Chinese vital sign dummy chest to improve the accuracy of the biological fidelity of the dummy chest.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] In a first aspect, the present invention provides a method for scaling a channel of a car collision dummy chest impact response, comprising:

[0008] Get the chest mass and scaling factors of the car collision dummy in each direction;

[0009] Construct a collision system and determine the working parameters; the working parameters include the mass of the pendulum m1, the mass of the dummy's chest m2, the initial velocity of the pendulum v0, the relative velocity v when the pendulum leaves the dummy's chest f , chest compression of the dummy at time t u(t), chest compression rate of the dummy at time t v(t), composite acceleration of the dummy's chest at time t a(t), equivalent stiffness K E , equivalent viscosity C E , rib component parameters;

[0010] According to the collision system, determining the relationship between mechanical parameters and the working condition parameters; the mechanical parameters include inertial force F and chest compression D;

[0011] Determining a scaling factor of the mechanical parameter according to the scaling factor and the relationship;

[0012] The chest impact response channel of the target dummy is determined according to the scaling coefficient of the mechanical parameter, the basic physical sign parameter value of the reference dummy, the basic physical sign parameter value of the target dummy and the chest impact response channel of the reference dummy.

[0013] As a further preferred technical solution, the chest mass of the automobile collision dummy and the scaling coefficients in each direction are:

[0014] or ; Among them, R m2 is the scaling factor of the chest mass, λ x is the scaling factor in the chest thickness direction, λ y is the chest width scaling factor, λ z is the chest height scaling factor, (TBW) S is the chest mass of the target dummy, (TBW) H is the chest mass of the reference dummy, (CT) S is the chest thickness of the target dummy, (CT) H is the chest thickness of the reference dummy, (CW) S is the chest width of the target dummy, (CW) H is the chest width of the reference dummy, (CH) S is the chest height of the target dummy, (CH) H is the chest height of the reference dummy, (TW) S is the weight of the target dummy, (TW) H is the weight of the reference dummy, (TSH) S is the target dummy's seat height, (TSH) H It is the seat height of the reference dummy.

[0015] As a further preferred technical solution, the collision system includes two mass blocks, a spring and a viscosity pot.

[0016] As a further preferred technical solution, the chest compression u(t) of the dummy at time t, the chest compression rate v(t) of the dummy at time t, and the composite chest acceleration a(t) of the dummy at time t are calculated using the following formula:

[0017] ; Among them, y1(t) is the displacement of the pendulum at time t, y2(t) is the displacement of the dummy's chest at time t, v1(t) is the velocity of the pendulum at time t, v2(t) is the velocity of the dummy's chest at time t, a1(t) is the acceleration of the pendulum at time t, and a2(t) is the acceleration of the dummy's chest at time t.

[0018] As a further preferred technical solution, the determining the relationship between the mechanical parameter and the operating condition parameter according to the collision system includes:

[0019] According to the collision system, a system dynamics model is determined;

[0020] The relationship between the mechanical parameters and the operating condition parameters is determined according to the system dynamics model, system momentum conservation, system energy conservation and system dissipated internal energy.

[0021] As a further preferred technical solution, the relationship between the mechanical parameters and the operating condition parameters is:

[0022] ; Where M and N are functions of the speed loss factor e, respectively, and their expressions are:

[0023] , , E is the Young's modulus of the rib assembly, h is the height of the cross section of the rib assembly, t is the thickness of the cross section of the rib assembly, and r is the radius of the rib assembly.

[0024] As a further preferred technical solution, the scaling factor of the mechanical parameter is:

[0025] ; Among them, R F is the scaling factor of the inertial force F, R D is the scaling factor of chest compression D, R Ke is the equivalent stiffness K E The scaling factor, R M is the scaling factor of function M, R v0 is the scaling factor of the initial velocity v0 of the pendulum, R m1 is the scaling factor of the pendulum mass m1, R m2 is the scaling factor of the dummy chest mass m2, R e is the scaling factor of the velocity loss factor e, R me is the sum of the mass of the pendulum and the dummy's chest m e The scaling factor, λ z is the scaling factor in the chest height direction, R N is the scaling factor of function N.

[0026] As a further preferred technical solution, the method of determining the chest impact response channel of the target dummy according to the scaling coefficient of the mechanical parameters, the basic vital sign parameter value of the reference dummy, the basic vital sign parameter value of the target dummy and the chest impact response channel of the reference dummy includes:

[0027] Determining a chest impact response boundary value of the target dummy according to a scaling factor of the mechanical parameter, a basic physical sign parameter value of a reference dummy, a basic physical sign parameter value of a target dummy, and a chest impact response channel of the reference dummy;

[0028] A chest impact response channel of the target dummy is determined according to the chest impact response boundary value of the target dummy.

[0029] In a second aspect, the present invention provides an electronic device, comprising:

[0030] at least one processor, and a memory communicatively coupled to at least one of the processors;

[0031] The memory stores instructions that can be executed by at least one of the processors, and the instructions are executed by at least one of the processors so that at least one of the processors can perform the above method.

[0032] In a third aspect, the present invention provides a computer-readable storage medium, on which computer instructions are stored, and the computer instructions are used to enable a computer to execute the above method.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The method for scaling the impact response channel of the chest of a car collision dummy provided by the present invention first obtains the chest mass of the car collision dummy and the scaling coefficients in each direction; then constructs a collision system to determine the working condition parameters; then determines the relationship between the mechanical parameters and the working condition parameters according to the collision system; the mechanical parameters include inertial force F and chest compression D; according to the scaling coefficient and the relationship, determines the scaling coefficient of the mechanical parameters; according to the scaling coefficient of the mechanical parameters, the basic physical sign parameter values ​​of the reference dummy, the basic physical sign parameter values ​​of the target dummy and the chest impact response channel of the reference dummy, determines the chest impact response channel of the target dummy. The method includes equivalent stiffness and equivalent viscosity in the working condition parameters, and determines the relationship between the mechanical parameters and the working condition parameters based on the collision system, so that the influence of stiffness and viscosity on the chest impact response is considered, and the chest impact response channel of the target dummy is more reliable, which makes up for the problem that the physical sign population represented by the target dummy cannot be biomechanically verified due to the lack of corpse experiments, and can be used in the development of Chinese physical sign dummy chest to improve the accuracy of the biological fidelity of the dummy chest. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a flow chart of a method for scaling a channel of an automobile collision dummy chest impact response provided by the present invention;

[0037] Figure 2 It is a schematic diagram of the structure of the collision system in the present invention;

[0038] Figure 3 is a schematic structural diagram of the rib assembly of the present invention;

[0039] Figure 4 Schematic diagram of the scaling result of the impact response channel of the chest of the automobile collision dummy of the present invention;

[0040] Figure 5 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0041] The following is a description of exemplary embodiments of the present application in conjunction with the accompanying drawings, including various details of the embodiments of the present application to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0042] Example 1

[0043] Figure 1 This is a flow chart of a method for scaling a car collision dummy's chest impact response channel provided in this embodiment. The method can be executed by a car collision dummy's chest impact response channel scaling device, which can be composed of software and / or hardware and is generally integrated in an electronic device. For ease of understanding, each step in the control method of this embodiment is executed by a computer.

[0044] like Figure 1 As shown, this embodiment provides a method for scaling a channel of a car collision dummy chest impact response, comprising the following steps:

[0045] S110, obtaining the chest mass of the automobile collision dummy and the scaling coefficients in each direction.

[0046] Optionally, the chest mass of the automobile collision dummy and the scaling coefficients in each direction are:

[0047] (1) or (2); where R m2 is the scaling factor of the chest mass, λ x is the scaling factor in the chest thickness direction, λ y is the chest width scaling factor, λ z is the chest height scaling factor, (TBW) S is the chest mass of the target dummy, (TBW) H is the chest mass of the reference dummy, (CT) S is the chest thickness of the target dummy, (CT) H is the chest thickness of the reference dummy, (CW) S is the chest width of the target dummy, (CW) H is the chest width of the reference dummy, (CH) S is the chest height of the target dummy, (CH) H is the chest height of the reference dummy, (TW) S is the weight of the target dummy, (TW) H is the weight of the reference dummy, (TSH) S is the target dummy's seat height, (TSH) H It is the seat height of the reference dummy.

[0048] If the chest size and mass parameters of the target dummy and the reference dummy are known, the chest mass of the car crash dummy and the scaling factors in each direction are as shown in formula (1). If only the sitting height and weight of the target dummy and the reference dummy are known, the chest mass of the car crash dummy and the scaling factors in each direction are as shown in formula (2).

[0049] S120, construct a collision system and determine working parameters; the working parameters include the mass of the pendulum m1, the mass of the dummy's chest m2, the initial velocity of the pendulum v0, the relative velocity v0 when the pendulum leaves the dummy's chest f , chest compression of the dummy at time t u(t), chest compression rate of the dummy at time t v(t), composite acceleration of the dummy's chest at time t a(t), equivalent stiffness K E , equivalent viscosity C E , rib component parameters.

[0050] Considering the chest impact of the dummy as a complete collision system, the collision system can be simplified to a single-degree-of-freedom collision of two rigid bodies. The collision system includes two mass blocks, a spring, and a sticky pot. Figure 2 The mass blocks are defined as the pendulum mass block (whose mass is m1) and the dummy chest mass block (whose mass is m2), and the equivalent stiffness of the spring is K E The equivalent viscosity of the sticky pot is CE , the subscripts S and H still represent the target dummy and the reference dummy respectively, such as (C E ) H Represents the equivalent viscosity in the crash system of the reference dummy.

[0051] In the collision system, the displacement of m1 at time t is y1(t), the velocity is v1(t), and the acceleration is a1(t). The displacement of m2 at time t is y2(t), the velocity is v2(t), and the acceleration is a2(t). Then the expressions of chest compression u(t), chest compression rate v(t), and chest composite acceleration are shown in formula (3).

[0052] (3)

[0053] Three stages are defined in the collision process. The first is the compression stage, in which the pendulum mass block gradually approaches the dummy chest mass block with an initial velocity of v0, and the chest compression gradually increases; the second is the common velocity stage, at which the chest compression reaches the maximum, the maximum compression is D, and the velocity is V; the last is the separation stage, in which the pendulum mass block gradually moves away from the dummy chest mass block. It is defined that when the pendulum mass block separates from the dummy chest mass block, the relative velocity between the two is the separation velocity, and the velocity is v f Define the speed loss factor e, and its expression is shown in formula (4).

[0054] (4)

[0055] S130. Determine, according to the collision system, the relationship between mechanical parameters and the operating condition parameters; the mechanical parameters include inertial force F and chest compression D.

[0056] Optionally, determining the relationship between the mechanical parameter and the operating condition parameter according to the collision system includes:

[0057] According to the collision system, a system dynamics model is determined;

[0058] The relationship between the mechanical parameters and the operating condition parameters is determined according to the system dynamics model, system momentum conservation, system energy conservation and system dissipated internal energy.

[0059] Specifically, during the collision, the system dynamics model is shown in formula (5), where m e It is the sum of the mass of the pendulum and the dummy's chest.

[0060] (5)

[0061] For formula (5), when the damping ratio of the system approaches 0, the chest compression amount and chest compression rate of the system can be approximately represented as an ellipse, so the expressions of the chest compression amount u(t) and chest compression rate v(t) are approximately obtained, as shown in formula (6).

[0062] (6)

[0063] Therefore, the chest compression rate v(t) during the compression phase and the separation phase can be expressed as formula (7).

[0064] (7)

[0065] According to the momentum conservation theorem, the system satisfies equation (8).

[0066] (8)

[0067] According to the law of conservation of energy, the energy of the system satisfies formula (9).

[0068] (9)

[0069] Where E0 is the initial kinetic energy of the system, E k is the kinetic energy of the system at the same speed, U k is the elastic potential energy of the system when it is at the same speed, Q C is the internal energy dissipated by the system. Substituting the known operating parameters into formula (9), we can get formula (10).

[0070] (10)

[0071] Definition of equivalent viscosity C E Satisfies formula (11):

[0072] (11)

[0073] Where ξ is the viscosity correction factor. Substituting formulas (7), (8) and (11) into formula (10), the expression for the maximum compression amount D can be obtained, see formula (12).

[0074] (12)

[0075] Assume that the chest cavity of the dummy is a semicircular rib assembly of continuous uniform medium, refer to Figure 3 , with a radius of r and a cross section of a rectangle with a thickness of t and a height of h. Under impact conditions, the inertia force F acts on the head end of the rib assembly, and its expression is shown in (13). It is compressed by Δr along the center of the circle. At this time, the work done by the external force of the unilateral rib assembly system is W M All converted into strain energy U generated by rib bending Eand internal energy Q C , as shown in formula (14).

[0076] (13)

[0077] (14)

[0078] The strain energy U E It can be expressed as formula (15):

[0079] (15)

[0080] Where E is the Young's modulus of the rib assembly, and I is the moment of inertia of the rectangular section, which can be expressed as shown in formula (16):

[0081] (16)

[0082] According to kinetic theory, the internal energy Q dissipated by the system C It can be expressed as formulas (17) and (18).

[0083] (17)

[0084] (18)

[0085] By combining equations (12), (17) and (18), we can solve the viscosity correction factor ξ, as shown in equation (19):

[0086] (19)

[0087] By combining formulas (12) to (19), we can solve the expressions of the main mechanical parameters of the collision system, as shown in (20):

[0088] (20)

[0089] Where M and N are functions of e, respectively, and their expressions are:

[0090] (twenty one)

[0091] S140. Determine a scaling factor of the mechanical parameter according to the scaling factor and the relationship.

[0092] Define R F , R H and R Ke They are the mechanical parameters F, D and working condition parameters K of the reference dummy relative to the target dummy. E The scaling factors can be expressed as:

[0093] (twenty two)

[0094] Furthermore, in order to simplify formula (22), we define R v0 , R m1 , R me , R e , R E , R M and R N They represent the initial velocity v0 of the pendulum, the mass m1 of the pendulum, the mass m2 of the dummy's chest, and the sum of the masses m of the pendulum and the dummy's chest. e , speed loss factor e, and scaling factors of functions M and N. These coefficients can be calculated based on the actual working conditions of the reference dummy and the target dummy. The expressions of these scaling factors are shown in (23). E Yes 1.

[0095] (twenty three)

[0096] Furthermore, define R h , R t and R r are the scaling factors of the reference dummy relative to the target dummy in terms of h, t and r parameters, respectively. These scaling factors are determined by the scaling factors of the dimensions in the direction in which they are located, as shown in formula (24):

[0097] (twenty four)

[0098] Therefore, F, D and K E The scaling factor can be expressed as:

[0099] (25)

[0100] S150 , determining a chest impact response channel of the target dummy according to the scaling coefficient of the mechanical parameter, the basic vital sign parameter value of the reference dummy, the basic vital sign parameter value of the target dummy, and the chest impact response channel of the reference dummy.

[0101] Optionally, determining the chest impact response channel of the target dummy according to the scaling coefficient of the mechanical parameter, the basic vital sign parameter value of the reference dummy, the basic vital sign parameter value of the target dummy and the chest impact response channel of the reference dummy comprises:

[0102] Determining a chest impact response boundary value of the target dummy according to a scaling factor of the mechanical parameter, a basic physical sign parameter value of a reference dummy, a basic physical sign parameter value of a target dummy, and a chest impact response channel of the reference dummy;

[0103] A chest impact response channel of the target dummy is determined according to the chest impact response boundary value of the target dummy.

[0104] Specifically, by substituting the basic vital sign parameter values ​​of the target dummy and the reference dummy into formulas (1) to (25), the chest impact response boundary value of the target dummy can be calculated, and the chest impact response channel of the target dummy can be determined by connecting the boundary points.

[0105] Based on this method, this implementation scheme calculates the chest impact response channel of the Chinese physical sign dummy (target dummy) according to the basic physical sign parameters (sitting height 872mm, weight 77.748kg) and chest impact response channel of the Hybrid III 50th male dummy (reference dummy), combined with the metrological data of the 50th percentile male in China (sitting height 918mm, weight 68kg), as shown in the following figure: Figure 4 shown.

[0106] The above-mentioned car collision dummy chest impact response channel scaling method first obtains the chest mass of the car collision dummy and the scaling coefficients in each direction; then constructs the collision system to determine the working condition parameters; then determines the relationship between the mechanical parameters and the working condition parameters according to the collision system; the mechanical parameters include inertial force F and chest compression D; according to the scaling coefficient and the relationship, determines the scaling coefficient of the mechanical parameters; according to the scaling coefficient of the mechanical parameters, the basic sign parameter values ​​of the reference dummy, the basic sign parameter values ​​of the target dummy and the chest impact response channel of the reference dummy, determines the chest impact response channel of the target dummy. This method includes equivalent stiffness and equivalent viscosity in the working condition parameters, and determines the relationship between the mechanical parameters and the working condition parameters based on the collision system, so that the influence of stiffness and viscosity on the chest impact response is considered, and the chest impact response channel of the target dummy is more reliable, which makes up for the problem that the physical sign population represented by the target dummy cannot be biomechanically verified due to the lack of corpse experiments, and can be used in the development of Chinese physical sign dummy chest to improve the accuracy of the biological fidelity of the dummy chest.

[0107] Example 2

[0108] like Figure 5 As shown, this embodiment provides an electronic device, including:

[0109] at least one processor; and

[0110] a memory communicatively connected to at least one of the processors; wherein,

[0111] The memory stores instructions executable by at least one of the processors, and the instructions are executed by at least one of the processors to enable at least one of the processors to perform the above method. At least one processor in the electronic device can perform the above method, and thus has at least the same advantages as the above method.

[0112] Optionally, the electronic device also includes interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are connected to each other using different buses and can be installed on a common mainboard or installed in other ways as needed. The processor can process instructions executed in the electronic device, including instructions stored in or on a memory to display graphical information of a GUI (Graphical User Interface) on an external input / output device (such as a display device coupled to an interface). In other embodiments, if necessary, multiple processors can be used together with multiple memories, and / or multiple buses can be used together with multiple memories. Similarly, multiple electronic devices can be connected (for example, as a server array, a group of blade servers, or a multi-processor system), and each device provides some necessary operations. Figure 5 A processor 301 is taken as an example.

[0113] The memory 302 is a computer-readable storage medium that can be used to store software programs, computer executable programs and modules, such as the program instructions / modules corresponding to the vehicle collision dummy chest impact response channel scaling method in the embodiment of the present invention. The processor 301 executes various functional applications and data processing of the device by running the software programs, instructions and modules stored in the memory 302, that is, realizing the above-mentioned vehicle in-situ steering control method.

[0114] The memory 302 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and at least one application required for a function; the data storage area may store data created according to the use of the terminal, etc. In addition, the memory 302 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other non-volatile solid-state storage device. In some instances, the memory 302 may further include a memory remotely arranged relative to the processor 301, and these remote memories may be connected to the device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0115] The electronic device may further include: an input device 303 and an output device 304. The processor 301, the memory 302, the input device 303 and the output device 304 may be connected via a bus or other means. Figure 5 The example of connecting through bus is taken in the following.

[0116] The input device 303 can receive input digital or character information, and the output device 304 can include a display device, an auxiliary lighting device (e.g., LED), and a tactile feedback device (e.g., a vibration motor), etc. The display device can include, but is not limited to, a liquid crystal display (LCD), a light emitting diode (LED) display, and a plasma display. In some embodiments, the display device can be a touch screen.

[0117] Example 3

[0118] This embodiment provides a computer-readable storage medium, on which computer instructions are stored, and the computer instructions are used to enable a computer to execute the above method. The computer instructions on the computer-readable storage medium are used to enable a computer to execute the above method, and thus have at least the same advantages as the above method.

[0119] The medium in the present invention may adopt any combination of one or more computer-readable media. The medium may be a computer-readable signal medium or a computer-readable storage medium. The medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples of the medium (a non-exhaustive list) include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, the medium may be any tangible medium containing or storing a program that may be used by or in combination with an instruction execution system, device, or device.

[0120] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, which carry computer-readable program code. Such propagated data signals may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0121] The program code contained on the computer-readable medium can be transmitted using any appropriate medium, including but not limited to wireless, wire, optical cable, RF (Radio Frequency), etc., or any suitable combination of the above.

[0122] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., through the Internet using an Internet service provider).

[0123] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps recorded in this application can be executed in parallel, sequentially or in different orders, as long as the expected results of the technical solution disclosed in this application can be achieved, and this document is not limited here.

[0124] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A method for scaling the impact response channel of a car collision dummy chest, characterized in that: include: Get the chest mass and scaling factors of the car collision dummy in each direction; Construct a collision system and determine the working parameters; the working parameters include the mass of the pendulum m1, the mass of the dummy's chest m2, the initial velocity of the pendulum v0, the relative velocity v when the pendulum leaves the dummy's chest f , chest compression of the dummy at time t u(t), chest compression rate of the dummy at time t v(t), composite acceleration of the dummy's chest at time t a(t), equivalent stiffness K E , equivalent viscosity C E , rib component parameters; According to the collision system, determining the relationship between mechanical parameters and the working condition parameters; the mechanical parameters include inertial force F and chest compression D; Determining a scaling factor of the mechanical parameter according to the scaling factor and the relationship; The chest impact response channel of the target dummy is determined according to the scaling coefficient of the mechanical parameter, the basic physical sign parameter value of the reference dummy, the basic physical sign parameter value of the target dummy and the chest impact response channel of the reference dummy.

2. The method for scaling the impact response channel of the automobile collision dummy chest according to claim 1, characterized in that: The chest mass and scaling factors of the automobile collision dummy in each direction are: or ; Among them, R m2 is the scaling factor of the chest mass, λ x is the scaling factor in the chest thickness direction, λ y is the chest width scaling factor, λ z is the chest height scaling factor, (TBW) S is the chest mass of the target dummy, (TBW) H is the chest mass of the reference dummy, (CT) S is the chest thickness of the target dummy, (CT) H is the chest thickness of the reference dummy, (CW) S is the chest width of the target dummy, (CW) H is the chest width of the reference dummy, (CH) S is the chest height of the target dummy, (CH) H is the chest height of the reference dummy, (TW) S is the weight of the target dummy, (TW) H is the weight of the reference dummy, (TSH) S is the target dummy's seat height, (TSH) H It is the seat height of the reference dummy.

3. The method for scaling the impact response channel of the automobile collision dummy chest according to claim 1, characterized in that: The collision system includes two mass blocks, a spring and a viscosity pot.

4. The method for scaling the impact response channel of the automobile collision dummy chest according to claim 1, characterized in that: The chest compression u(t) of the dummy at time t, the chest compression rate v(t) of the dummy at time t, and the composite chest acceleration a(t) of the dummy at time t are calculated using the following formula: ; Among them, y1(t) is the displacement of the pendulum at time t, y2(t) is the displacement of the dummy's chest at time t, v1(t) is the velocity of the pendulum at time t, v2(t) is the velocity of the dummy's chest at time t, a1(t) is the acceleration of the pendulum at time t, and a2(t) is the acceleration of the dummy's chest at time t.

5. The method for scaling the impact response channel of the automobile collision dummy chest according to claim 1, characterized in that: Determining the relationship between the mechanical parameter and the operating condition parameter according to the collision system includes: According to the collision system, a system dynamics model is determined; The relationship between the mechanical parameters and the operating condition parameters is determined according to the system dynamics model, system momentum conservation, system energy conservation and system dissipated internal energy.

6. The method for scaling the impact response channel of the automobile collision dummy chest according to claim 1, characterized in that: The relationship between the mechanical parameters and the working condition parameters is: ; Where M and N are functions of the speed loss factor e, respectively, and their expressions are: , , E is the Young's modulus of the rib assembly, h is the height of the cross section of the rib assembly, t is the thickness of the cross section of the rib assembly, and r is the radius of the rib assembly.

7. The method for scaling the impact response channel of the automobile collision dummy chest according to claim 1, characterized in that: The scaling factor of the mechanical parameters is: ; Among them, R F is the scaling factor of the inertial force F, R D is the scaling factor of chest compression D, R Ke is the equivalent stiffness K E The scaling factor, R M is the scaling factor of function M, R v0 is the scaling factor of the initial velocity v0 of the pendulum, R m1 is the scaling factor of the pendulum mass m1, R m2 is the scaling factor of the dummy chest mass m2, R e is the scaling factor of the velocity loss factor e, R me is the sum of the mass of the pendulum and the dummy's chest m e The scaling factor, λ z is the scaling factor in the chest height direction, R N is the scaling factor of function N.

8. The method for scaling the impact response channel of the automobile collision dummy chest according to any one of claims 1 to 7, characterized in that: The step of determining the chest impact response channel of the target dummy according to the scaling coefficient of the mechanical parameter, the basic physical sign parameter value of the reference dummy, the basic physical sign parameter value of the target dummy and the chest impact response channel of the reference dummy comprises: Determining a chest impact response boundary value of the target dummy according to a scaling factor of the mechanical parameter, a basic physical sign parameter value of a reference dummy, a basic physical sign parameter value of a target dummy, and a chest impact response channel of the reference dummy; A chest impact response channel of the target dummy is determined according to the chest impact response boundary value of the target dummy.

9. An electronic device, characterized in that: include: at least one processor, and a memory communicatively coupled to at least one of the processors; The memory stores instructions executable by at least one of the processors, and the instructions are executed by at least one of the processors so that the at least one processor can execute the method according to any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that: The medium stores computer instructions, and the computer instructions are used to enable a computer to execute the method according to any one of claims 1 to 8.

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