A three-axis adjustable vertical impact device and control method

Abstract

The application relates to the technical field of equipment testing, in particular to a three-axis adjustable vertical impact equipment and a control method. The equipment comprises a rack base, one side edge of the rack base is provided with an electric guide rail, a stand column bottom plate is driven to slide through the electric guide rail; a stand column and a stand column supporting rod are connected on the stand column bottom plate, a horizontal up-down cantilever and a cantilever supporting rod are connected on the stand column, a lower end of the horizontal up-down cantilever is provided with a cantilever sliding groove sliding rail; the cantilever sliding groove sliding rail is provided with a pulley base, a hoisting circular ring and an electromagnet, the pulley base is provided with a pulley, the hoisting circular ring is composed of a round rod and a sleeve ring, the electromagnet is connected with an impact head through a steel wire rope and a safety rope; a control box comprises a driving motor for winding and releasing the steel wire rope, an electromagnet control mechanism for controlling the electromagnet and an electric sliding rail controller. The application efficiently completes multi-target impact on the same tested object and one-time clamping test on different tested objects.

Description

Technical Field

[0001] This application relates to the field of equipment testing technology, and more specifically, to a triaxial adjustable vertical impact device and control method. Background Technology

[0002] A drop hammer impact tester is a testing device used to assess the performance of materials and structures under instantaneous impact forces. It is widely used in engineering, manufacturing, materials science, and other fields to evaluate the toughness, impact strength, and fracture behavior of materials or structures.

[0003] A drop hammer impact test simulates instantaneous impact loads by dropping a heavy hammer from a certain height to strike the material or structure under test. The force generated by the impact is recorded by sensors and a data acquisition system to analyze the impact resistance, deformation process, and failure mode of the tested sample. In traditional testing methods, the component is clamped before the drop hammer is released from a fixed position. Testing different parts of the same component requires re-clamping and repositioning, and different components require multiple clamping and repositioning operations. This process is cumbersome, inefficient, requires highly experienced operators, and is prone to inaccurate positioning, making repeated tests unreliable.

[0004] In view of this, this application is made. Summary of the Invention

[0005] The purpose of this application is to provide a triaxial adjustable vertical impact device and control method, which avoids repeated clamping of the test object and successive testing of multiple parts by adjusting the position of the impact head, and efficiently completes multi-target impact of the same test object and single clamping test of different test objects.

[0006] To achieve the above objectives, this application adopts the following technical solution:

[0007] In a first aspect, this application provides a triaxially adjustable vertical impact device, comprising:

[0008] The platform base has an electric guide rail on one side edge, which drives the column base plate to slide.

[0009] A column and a column support rod are connected to the column base plate. A horizontal upper and lower cantilever and a cantilever support rod are connected to the column. The lower end of the horizontal upper and lower cantilever is equipped with a cantilever slide rail.

[0010] The cantilever chute rail is equipped with a pulley base, a lifting ring and an electromagnet. The pulley base is equipped with a pulley, the lifting ring is composed of a round rod and a collar, and the electromagnet is connected to the impact head through a steel wire rope and a safety rope.

[0011] The control box includes: a drive motor for winding and releasing the wire rope, an electromagnet control mechanism for controlling the electromagnet, and an electric slide rail controller.

[0012] Secondly, this application provides a control method for a triaxially adjustable vertical impact device, applicable to the triaxially adjustable vertical impact device provided in this application, the method comprising:

[0013] Based on the aforementioned triaxial adjustable vertical impact device, a fourth-order dynamic model is constructed;

[0014] Derive the mechanical system transfer function based on the fourth-order dynamic model;

[0015] A position loop is constructed based on the transfer function, and the control quantity is determined.

[0016] The control quantity is applied to the electric slide rail actuator of the vertical impact device.

[0017] Compared with the prior art, the beneficial effects of this application are as follows:

[0018] This application achieves the following through the collaborative design of a modular multi-clamp bench and a three-axis slide rail displacement system (horizontal cantilever slide rail + vertical column slide rail): 1) Single clamping of the same test item: By adjusting the horizontal cantilever slide rail and the vertical column slide rail, different positions of the same test item and different test impact heights of the same test item can be adjusted, avoiding multiple clamping and improving efficiency and repeatability positioning accuracy; 2) Single clamping of multiple samples: The bench base can fix multiple test items at the same time, avoiding positioning errors caused by repeated disassembly in traditional solutions. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a triaxial adjustable vertical impact device provided in an embodiment of this application;

[0021] Figure 2 This is a front view of the triaxial adjustable vertical impact device provided in the embodiments of this application;

[0022] Figure 3 This is a side view of the triaxially adjustable vertical impact device provided in the embodiments of this application;

[0023] Figure 4This is a top view of the triaxial adjustable vertical impact device provided in the embodiments of this application;

[0024] Figure 5 A flowchart of the control method for a triaxial adjustable vertical impact device provided in this application embodiment;

[0025] Figure 6 This is a structural diagram of the closed-loop control system for the electric guide rail provided in an embodiment of this application;

[0026] Among them, 1-platform base, 2-electric guide rail, 3-first positioning buckle, 4-column base plate, 5-column, 6-support rod, 7-horizontal upper and lower cantilever, 8-cantilever support rod, 9-cantilever electric slide rail, 10-second positioning buckle, 11-pulley base, 12-lifting ring, 13-electromagnet, 14-pulley, 15-wire rope, 16-safety rope, 17-impact head, 18-round rod, 19-ring, 20-clamping platform. Detailed Implementation

[0027] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of this application, including various details to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0028] Figure 1 This is a schematic diagram of the structure of a triaxial adjustable vertical impact device provided in an embodiment of this application. Figure 2 This is a front view of the triaxial adjustable vertical impact device provided in the embodiments of this application; Figure 3 This is a side view of the triaxially adjustable vertical impact device provided in the embodiments of this application; Figure 4 This is a top view of the triaxially adjustable vertical impact device provided in an embodiment of this application. See also... Figures 1-4 The device includes:

[0029] The platform base 1 is fixed to the ground and placed horizontally. One edge of the platform base 1 is equipped with an electric guide rail 2. Figure 1Two electric guide rails 2 are shown. A column base plate 4 engages with the electric guide rails 2, causing the column base plate 4 to slide. A column 5 and a column support rod 6 are connected to the column base plate 4. A column slide rail (not shown) is installed on the column 5. A horizontal upper and lower cantilever arm 7 and a cantilever support rod 8 are connected to the column 5. The lower end of the horizontal upper and lower cantilever arm 7 is equipped with a matching cantilever slide rail 9. The horizontal upper and lower cantilever arm 8 slides up and down on the column slide rail, achieving movement perpendicular to the ground. The cantilever slide rail 9 is equipped with a pulley base 11, a lifting ring 12, and an electromagnet 13. The pulley base 11 is equipped with a pulley 14. The lifting ring 12 consists of a round rod 18 and a collar 19. The electromagnet 13 is connected to the impact head 17 via a wire rope 15 and a safety rope 16. The safety rope 15 provides protection.

[0030] The electric guide rail 2 is equipped with a first positioning latch 3, and the cantilever slide rail 9 is equipped with a second positioning latch 10. The electric guide rail 2 and the cantilever slide rail 9 provide movement in the horizontal plane (e.g., in mutually perpendicular x-axis and y-axis directions), and after moving to the appropriate position, they are fixed by the first positioning latch 3 and the second positioning latch 10 respectively. The column slide rail provides movement perpendicular to the horizontal plane, i.e., movement in the z-axis direction.

[0031] The hoisting ring 12 ensures that the impact head 17 falls vertically. The falling height of the impact head 17 is adjusted by the wire rope 15, and the falling action of the impact head 17 is controlled by the electromagnet 13.

[0032] The device also includes a control box (not shown). The control box includes: a drive motor for winding and releasing the wire rope 15, an electromagnet control mechanism for controlling the electromagnet 13, and an electric slide rail controller. The control box is powered by an external power supply. The electric guide rail 2 is defined to move in the x-direction, and the cantilever slide rail 9 slides in the y-direction. The electric slide rail controller controls the electric guide rail and the cantilever slide rail to drive the impact head to move horizontally (xy).

[0033] Optionally, a fixture platform 20 is arranged on the test bench base 1; the fixture platform 20 is equipped with corresponding fixtures according to the selected test item (such as a car power battery pack, helmet, etc.).

[0034] Optionally, a triaxial acceleration sensor (not shown) is installed at the center of the impact head 17, and the triaxial acceleration sensor is connected to a data acquisition system. During the release and descent of the impact head, the triaxial acceleration is collected by the triaxial acceleration sensor; video of the impact process is captured by a high-speed camera, allowing clear observation of the dynamic impact process and the deformation process of the tested object. The deformation of the tested object is measured using measuring equipment (such as a measuring tape and a 3D scanning device).

[0035] The following is based on Figure 1 The equipment shown is described in detail, outlining the impact test process.

[0036] During the impact test, the fixture is first installed at the fixing points on the fixture platform 20 to secure the object to be tested. The operator then controls the electric guide rail 2 and the cantilever slide rail 9 via the electric slide rail controller. Assuming the electric guide rail 2 moves along the x-axis and the cantilever slide rail 9 moves along the y-axis, the x-axis and y-axis coordinates are input on the human-machine interface to move the impact head 17 to the (x, y) position. Finally, the impact head is released via the electromagnet 13, achieving the effect of impacting the object to be tested.

[0037] The triaxial adjustable vertical impact device provided in this embodiment achieves the following through the coordinated design of a modular multi-clamp stand and a triaxial slide rail displacement system (horizontal cantilever slide rail, electric guide rail, and vertical column slide rail): 1) Single clamping of the same test item: By adjusting the horizontal cantilever slide rail, electric guide rail, and vertical column slide rail, different positions and different impact heights of the same test item can be adjusted, avoiding multiple clamping and improving efficiency and repeatability accuracy; 2) Single clamping of multiple samples: The stand base can simultaneously fix multiple test items, avoiding positioning errors caused by repeated disassembly in traditional solutions.

[0038] Figure 5 This is a flowchart of a control method for a triaxially adjustable vertical impact device provided in an embodiment of this application. The method is applicable to the triaxially adjustable vertical impact device provided in the above embodiments, and includes:

[0039] S110. Based on the aforementioned triaxial adjustable vertical impact device, construct a fourth-order dynamic model.

[0040] S120. Derive the transfer function of the mechanical system based on the fourth-order dynamic model.

[0041] First, based on a three-axis adjustable vertical impact device, a horizontal force balance (guide rail + load) and load oscillation equation are constructed. The load (impact head, etc.) oscillates during its horizontal movement with the guide rail. The load (impact head, etc.) is suspended by a steel wire rope, equivalent to a simple pendulum; when the guide rail accelerates or decelerates in the plane, it excites the load to oscillate, forming part of the fourth-order model:

[0042] ;Formula (1)

[0043] ;Formula (2)

[0044] In formulas (1) and (2), The equivalent mass of the guide rail includes moving parts such as the electric guide rail and the cantilever slide rail. m is the load mass, which includes the impact head and its follower (including the wire rope and safety rope). x is the displacement variable of the slide table (the entirety of all sliding parts) in the x-direction along with the electric guide rail. This embodiment uses the x-direction as an example for illustration. The control logic in the y-direction is similar and remains consistent with the single-axis modeling of formulas (1) to (3). θ is the suspension load swing angle, and g is the gravitational acceleration. l It is the equivalent pendulum length, and F(t) is the motor driving force applied to the slide in the x direction.

[0045] To address the complex motion characteristics of the load, a fourth-order dynamic model incorporating translational and oscillating degrees of freedom can be established by applying a Laplace transformation to equations (1) and (2). By assuming a small-angle linearization of the suspension load sway angle, the transfer function of the mechanical system is derived:

[0046] ;Formula (3)

[0047] in, It is the natural frequency of the oscillation.

[0048] Substituting the existing equipment parameters into the solution of the suspended load transfer function of this equipment, we get:

[0049] ;Formula (4)

[0050] The existing equipment parameters include load mass, equivalent mass of the guide rail, equivalent pendulum length, gravitational acceleration, and natural frequency of oscillation.

[0051] S130. Construct a position loop based on the transfer function and determine the control quantity.

[0052] S140. Apply the control quantity to the electric slide rail actuator of the vertical impact device.

[0053] Specifically, for control in the x-direction, the electric slide rail actuator includes a motor for the electric guide rail; for control in the y-direction, the electric slide rail actuator includes a motor for the cantilever slide rail.

[0054] This embodiment constructs a high-precision PID (proportional-derivative-integral) closed-loop control system using the Simulink simulation platform, significantly improving the positioning performance of the electric guide rail under heavy load conditions. The simulation system can be found here. Figure 6 .

[0055] Figure 6 In the input, the desired position r is given, and x is the feedback position. rx yields the deviation e. The deviation e is input to the position loop PID(s) to obtain the control input, which is then input to the motor and the transfer function. The output position x is the position sampled by the sensor and fed back to the input.

[0056] First, based on a fourth-order dynamic model, an accurate transfer function incorporating translational and oscillating degrees of freedom was established. Then, a position loop control architecture with feedforward compensation was designed: the position loop control employs a PID algorithm, adjusting the proportional, integral, and derivative parameters to suppress load oscillation.

[0057] By controlling the motor drive force in real time, the load position on the x-axis gradually approaches the desired value.

[0058] Simulation results show that the control system can improve the positioning accuracy of a 15kg weight load to ±0.1mm, which is more than 20 times better than traditional open-loop control. Specifically, by optimizing the filtering of the differential term to reduce commutation frequency and power fluctuations, the motor commutation frequency was successfully reduced by 63%, and the power fluctuation amplitude was significantly reduced. The system's settling time under a 0.1m step command was shortened to 2.2 seconds, and the load swing amplitude was controlled within ±0.05°. This control method not only solves the positioning inaccuracy problem caused by large inertial loads but also significantly improves efficiency, providing an innovative solution for the precise positioning of heavy equipment.

[0059] Optionally, before adjusting the triaxially adjustable vertical impact device according to the control quantity, the method further includes: determining the contact radius between the impact head and the test object; determining the relationship between the contact force between the impact head and the test object and the deformation amount; obtaining the maximum contact pressure based on the contact radius and the relationship; and then, after measuring the deformation of the test object by the measuring device, if the difference between the maximum contact pressure and the yield strength of the test object material is greater than a set threshold, the test object fails.

[0060] Specifically, based on Hertzian contact theory, the contact force, deformation, and energy transfer patterns during the impact process can be accurately predicted. When an impact head (assumed to be spherical with radius R) impacts the test object (considered as a plane) at a velocity v (i.e., the instantaneous velocity of the impact head when it collides with the test object), elastic deformation occurs in the contact area, and its mechanical behavior can be described by the Hertzian contact model:

[0061] Contact radius a The relationship between the deformation δ of the contact area with the tested object and the deformation δ:

[0062] ;Formula (5)

[0063] in: a The radius of contact (in meters) is represented by δ, which represents the normal compressive deformation (in meters) and varies with time.

[0064] In practical applications of the equipment, the contact radius can be measured through impact pre-testing.a The estimated value.

[0065] According to elasticity mechanics, the contact force F between the impact head and the tested object and the deformation δ satisfy the following:

[0066] ;Formula (6)

[0067] ;Formula (7)

[0068] in: It represents the equivalent elastic modulus (in Pa), which is determined by the elastic parameters of the impact head and the tested object. , These represent the elastic modulus and Poisson's ratio of the impact head, respectively. , These represent the elastic modulus and Poisson's ratio of the tested item, respectively.

[0069] Since the pressure in the contact area is distributed in a semi-ellipsoidal pattern, and the maximum contact pressure is located at the center of the contact area, then the maximum contact pressure... Calculate using the following formula:

[0070] ;Formula (8)

[0071] in: It is the peak value of the pressure distribution within the contact area, i.e., the maximum contact pressure, which determines whether the material yields or is damaged.

[0072] Maximum contact force is a key quantity for failure criteria and safety assessment. If the calculated maximum contact pressure is much greater than the material's yield strength, then... If the test object fails, it is highly likely to exhibit failure modes such as plastic deformation or even fracture.

[0073] Optionally, after measuring the deformation of the object under test using a measuring device, the method further includes: determining the collision time between the impact head and the object under test; calculating the average impact force based on the collision time and the mass of the impact head; calculating the energy absorbed by the collision based on the average impact force and the amount of deformation; and calculating the rebound energy based on the rebound height and mass of the impact head in the video.

[0074] Specifically, based on Hertzian theory, the elastic collision time is given. :

[0075] ;Formula (9)

[0076] in: R is the mass of the impact head, R is the radius of the impact head, and v is the instantaneous velocity of the impact head when it collides with the object being tested.

[0077] Furthermore, based on the momentum theorem, the average impact force of the impact head on the tested object is calculated. Perform theoretical estimations. The estimated results can be compared and verified with data from the impact head's internal force sensor.

[0078] ;Formula (10)

[0079] in: Let be the mass of the impact head, and v be the instantaneous velocity of the impact head when it collides with the object being tested. It is the elastic collision time.

[0080] If the estimated result differs from the data from the impact head internal force sensor, calibration and time synchronization can be performed first, and the contact / installation conditions between the impact head and the object being tested can be checked before retesting.

[0081] The impact force and energy can be experimentally verified using the following formula: total energy. The energy absorbed during the collision is related to the height of the impact head. It can be obtained by integrating the contact force F over the contact depth (i.e., the normal compressive deformation). Rebound energy. The rebound height of the impact head can then be captured by a high-speed camera. get.

[0082] ;

[0083] The total energy E mentioned above, and the energy absorbed in the collision. and rebound energy It can be used to evaluate the energy absorption capacity of the tested item.

[0084] Where E is the total energy generated during the impact, m is the mass of the impact head, g is the gravitational acceleration, and h is the height of the impact head's fall.

[0085] This embodiment provides an electronic device, including at least one processor and a memory communicatively connected to at least one of the processors;

[0086] The memory stores instructions that can be executed by at least one of the processors to enable the at least one processor to perform the control method of the triaxial adjustable vertical impact device described above, thus having at least the same advantages as the method described above.

[0087] Optionally, the electronic device also includes interfaces for connecting the various components, including high-speed interfaces and low-speed interfaces. The components are interconnected using different buses and can be mounted on a common motherboard or otherwise installed as needed. The processor can process instructions executed within the electronic device, including instructions stored in or on memory to display graphical information of a GUI (Graphical User Interface) on an external input / output device (such as a display device coupled to the interface). In other embodiments, multiple processors can be used with multiple memories, and / or multiple buses can be used with multiple memories, if desired. Similarly, multiple electronic devices (e.g., as a server array, a group of blade servers, or a multiprocessor system) can be connected, each providing some of the necessary operations.

[0088] Memory, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions / modules corresponding to the control method of the triaxial adjustable vertical impact device in the embodiments of this application. The processor executes various functional applications and data processing of the device by running the software programs, instructions, and modules stored in the memory, thereby realizing the control method of the aforementioned triaxial adjustable vertical impact device.

[0089] The memory may primarily comprise a program storage area and a data storage area. The program storage area may store the operating system and at least one application program required for a given function; the data storage area may store data created based on terminal usage. Furthermore, the memory may include high-speed random access memory (RAM) and non-volatile memory, such as at least one disk storage device, flash memory, or other non-volatile solid-state storage device. In some instances, the memory may further include memory remotely located relative to the processor, which can be connected to the device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks (LANs), mobile communication networks, and combinations thereof.

[0090] The electronic device may also include input devices and output devices. The processor, memory, input devices, and output devices may be connected via a bus or other means.

[0091] The input device can receive input digital or character information, and the output device may include a display device, an auxiliary lighting device (e.g., an LED), and a haptic feedback device (e.g., a vibration motor). The display device may 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 may be a touchscreen.

[0092] This embodiment provides a medium storing computer instructions for instructing a computer to perform the methods described above. The computer instructions on this medium, used to instruct the computer to perform the methods described above, thus possess at least the same advantages as the methods described above.

[0093] The medium in this application may be 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, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any combination thereof. More specific examples of the medium (a non-exhaustive list) include: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this document, the medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device.

[0094] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of sending, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0095] Program code contained on a computer-readable medium may be transmitted using any suitable medium, including but not limited to wireless, wire, optical fiber, RF (Radio Frequency), or any suitable combination thereof.

[0096] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof. Programming languages ​​include object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0097] It should be understood that the various forms of processes shown above can be used to rearrange, add, or delete steps. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution disclosed in this application can be achieved, and this is not limited herein.

[0098] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand 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 within the scope of protection of this application.

Claims

1. A control method for a triaxially adjustable vertical impact device, characterized in that, include: A fourth-order dynamic model is constructed based on a triaxial adjustable vertical impact device; Derive the mechanical system transfer function based on the fourth-order dynamic model; A position loop is constructed based on the transfer function, and the control quantity is determined. The control quantity is applied to the electric slide rail actuator of the vertical impact device; The triaxial adjustable vertical impact device includes: The platform base has an electric guide rail on one side edge, which drives the column base plate to slide. A column and a column support rod are connected to the column base plate. A horizontal upper and lower cantilever and a cantilever support rod are connected to the column. The lower end of the horizontal upper and lower cantilever is equipped with a cantilever slide rail. The cantilever chute rail is equipped with a pulley base, a lifting ring and an electromagnet. The pulley base is equipped with a pulley, the lifting ring is composed of a round rod and a collar, and the electromagnet is connected to the impact head through a steel wire rope and a safety rope. The control box includes: a drive motor for winding and releasing the wire rope, an electromagnet control mechanism for controlling the electromagnet, and an electric slide rail controller.

2. The control method for the triaxial adjustable vertical impact device according to claim 1, characterized in that, A triaxial acceleration sensor is installed at the middle position of the impact head, and the triaxial acceleration sensor is connected to the data acquisition system.

3. The control method for the triaxial adjustable vertical impact device according to claim 2, characterized in that, The electric guide rail is equipped with a first positioning buckle, and the cantilever slide rail is equipped with a second positioning buckle; The impact head's descent height is adjusted via a steel wire rope.

4. The control method for the triaxial adjustable vertical impact device according to claim 3, characterized in that, A fixture platform is arranged on the base of the test bench; the fixture platform is equipped with corresponding fixtures according to the selected test item.

5. The control method for the triaxial adjustable vertical impact device according to claim 1, characterized in that, Also includes: During the release and descent of the impact head, triaxial acceleration is collected by a triaxial acceleration sensor; Video of the impact process was captured using a high-speed camera; The deformation of the object being tested is measured using measuring equipment.

6. The control method for the triaxial adjustable vertical impact device according to claim 5, characterized in that, Before applying the control quantity to the electric slide rail actuator of the vertical impact device, the following is also included: Determine the contact radius between the impact head and the object being tested; Determine the relationship between the contact force between the impact head and the tested object and the amount of deformation; The maximum contact pressure is obtained based on the contact radius and the relationship described above. After measuring the deformation of the object being tested using measuring equipment, the process also includes: If the difference between the maximum contact pressure and the yield strength of the material being tested is greater than a set threshold, the material being tested will fail.

7. The control method for the triaxial adjustable vertical impact device according to claim 6, characterized in that, After measuring the deformation of the object being tested using measuring equipment, the process also includes: Determine the collision time between the impact head and the object being tested; Calculate the average impact force based on the collision time and the mass of the impact head; Calculate the energy absorbed in the collision based on the average impact force and deformation. Calculate the rebound energy based on the rebound height and mass of the impact head as shown in the video.

Images