A rocket separation steel cable impact response test platform based on electromagnetic drive

Abstract

The application belongs to the technical field of electromagnetism and aerospace separation, and relates to a rocket separation steel cable impact response test platform based on electromagnetic driving. The test platform is composed of an electromagnetic driving module, a steel cable impact test module and a data analysis module. The pulse power supply in the electromagnetic driving module makes the guide rail generate a stable magnetic field and provides a loop power supply to provide speed for the driving part, the steel cable impact test module is impacted by the driving part to realize the separation of the upper end pin and the socket, the entire movement process is recorded through a high-speed camera and a photoelectric sensor, and the obtained movement characteristics are analyzed to respond to the entire process of the steel cable hand impact. Compared with the existing rope separation mode based on an air gun, the test platform has the characteristics of convenient control, superior stability performance, low cost, small size and reusability. Based on the above advantages, a new generation of rocket steel cable separation test technology is expected to be formed, and the electromagnetic driving device is widely applied in the field of aerospace.

Description

Technical Field

[0001] This invention relates to the fields of electromagnetics and aerospace separation, and specifically to a test platform for the impact response of a separation cable based on electromagnetic drive. Background Technology

[0002] The rocket separation system is a critical component ensuring the safe and reliable completion of missions, impacting every aspect of rocket flight, from safety to performance and mission success. Separation cables are a key component in achieving electrical connection and separation, and have significant applications in the aerospace field.

[0003] Currently, the main types of detachable steel cables include wire rope, S-hook, and shackle types, and their testing is mostly achieved by providing motion load through an air gun. Air gun testing is a destructive test, suffering from poor repeatability and low safety, thus necessitating a new, highly reliable, and safe technology for testing the impact response of detachable steel cables.

[0004] The essence of electromagnetic drive is that a conductor, under the interaction of an electromagnetic field and an electric current, generates a driving force, thus moving. There are two common structural forms: the electromagnetic gun form, which consists of a power supply rail and a conductor; and the electromagnetic catapult form, which consists of a coil, a magnet, and a power supply.

[0005] Existing methods for testing composite ropes have various drawbacks. In contrast, the electromagnetically driven split cable impact response testing platform has irreplaceable advantages such as high precision, high speed, low cost, and strong stability. It is expected to form a highly reliable and safe split cable impact response testing platform, promoting the widespread application of electromagnetic drive devices in the aerospace field. Summary of the Invention

[0006] The purpose of this invention is to address the problems of existing separate steel cable impact response testing devices, such as high destructiveness, high cost, and harsh working conditions, by providing a separate steel cable impact response testing platform based on the electromagnetic drive principle. This platform is characterized by good stability, simple structure, low cost, and reusability.

[0007] This invention is achieved through the following technical solution:

[0008] An electromagnetically driven rocket separation cable impact response testing platform, characterized by an electromagnetic drive module, a cable impact testing module, and a data analysis module;

[0009] The electromagnetic drive module includes a sequential pulse AC power supply, a conductive concave triangular rectangular drive component, an upper copper rail on the drive component, a lower copper rail on the drive component, and connecting wires. The upper copper rail of the drive component is in close contact with the upper end of the conductive concave triangular rectangular drive component, and the lower copper rail of the drive component is in close contact with the lower end of the conductive concave triangular rectangular drive component. Together with the sequential pulse AC power supply and connecting wires, they form a closed loop. The sequential pulse AC power supply first generates short pulses with a period of 0.05 ms and a duty cycle of 16%. Under the excitation of the power supply, the upper and lower copper rails of the drive component generate a magnetic field around them. Under the combined action of the electromagnetic field, the drive component generates a driving force for parallel movement to the right. Then, the sequential pulse AC power supply generates long pulses with a period of 0.05 ms and a duty cycle of 80%. The system provides acceleration to the drive component. A photoelectric sensor light source is placed along one side of the upper copper guide rail of the drive component, and a photoelectric sensor light receiver is placed along one side of the lower copper guide rail of the drive component. The speed of the drive component at its current position is calculated by the time the drive component moves and blocks the light source. This speed is then transmitted to the electromagnetic drive controller as the drive component's movement speed. The current input terminal is controlled by a closed-loop PID controller to obtain the ideal drive component speed. The last set of photoelectric sensors is placed at the rightmost exit of the guide rail. When the drive component reaches the exit and leaves the guide rail, its final speed is recorded. The energy loss in this module is evaluated by combining the power consumption of the sequential pulse AC power supply.

[0010] The steel cable impact test module includes a concave triangular rectangular drive with conductive properties, a high-speed camera, and a steel cable. The steel cable initially has a certain amount of slack, with its lower end fixed by a lower fixing component and its upper end connected to a pin. The pin is connected to a socket. The high-speed camera is placed on the upper left side of the steel cable, parallel to the pin. The drive impacts the steel cable parallel to the outlet. The concave triangular structure of the drive is used to fix the steel cable during the impact. The high-speed camera records the entire process from the start of the impact until the steel cable causes the pin to separate from the socket.

[0011] The data analysis module includes an image preprocessing unit, a frame difference calculation unit, a feature extraction unit, and a response analysis unit. The response analysis unit comprises a stress state analysis unit, a motion process analysis unit, a deformation process analysis unit, and an energy absorption analysis unit. Images captured by the high-speed camera are smoothed and denoised by the image preprocessing unit in the data analysis module. Then, the frame difference calculation unit divides adjacent frames into foreground and background. The coordinates of white pixels in the foreground image are set as the initial target position. The position and velocity of the conductive concave triangular rectangular drive component, the axial elongation, axial velocity, axial acceleration, radial displacement, radial velocity, and radial acceleration of the steel cable are tracked and features extracted. Based on the obtained velocity characteristics of the conductive concave triangular rectangular drive component at the moment of impact with the steel cable, causing the pin to separate from the socket, combined with the final velocity of the conductive concave triangular rectangular drive component when it detaches from the guide rail... Based on the kinetic energy theorem, the loss velocity of the driving component is calculated. Simultaneously, the obtained axial and radial velocity characteristics of the steel cable are used to calculate the energy absorbed by the steel cable during the impact process in segments, and the sum is calculated. The energy absorption is then evaluated by the energy absorption analysis unit. Using a neural network method, the stress state of the entire steel cable is obtained by taking parameters such as axial elongation, axial velocity, axial acceleration, radial displacement, radial velocity, radial acceleration, and driving component velocity as input conditions. The motion process analysis unit evaluates the motion process of the driving component and the steel cable, the stress state analysis unit analyzes the stress state of the steel cable, and the deformation process analysis unit analyzes the deformation process of the steel cable.

[0012] The sequential pulse AC power supply is a segmented sequential pulse square wave current, with the long pulse having a duty cycle 5 times that of the short pulse.

[0013] The light source and light receiver of the photoelectric sensor are placed symmetrically close to the guide rail.

[0014] The data analysis module uses a feature extraction method based on frame difference.

[0015] The dynamic motion speed of the drive component is controlled by an electromagnetic drive controller. The actual speed value of the drive component exit, measured by a photoelectric sensor, is compared with the actual energy consumption value of the power supply to obtain the energy consumption in the electromagnetic drive module. The kinetic energy consumption of the drive component is calculated by combining the actual speed of the drive component exit with the speed value captured by a high-speed camera when the steel cable is impacted and the pin is pulled apart from the socket. Simultaneously, the axial and radial velocity characteristics of the steel cable obtained based on the frame difference method are used to calculate the energy absorbed by the steel cable during the impact process in segments based on the kinetic energy theorem, and the sum is used to obtain the total energy absorbed by the steel cable during the impact process. Based on the law of conservation of energy, the energy loss in the steel cable impact test module is analyzed. Based on the images of the steel cable impact process captured by the high-speed camera, a neural network method is used with parameters such as the axial elongation, axial velocity, axial acceleration, radial displacement, radial velocity, radial acceleration, and drive component speed of the steel cable as input conditions to obtain the stress state of the entire steel cable and to analyze the response of the stress state, motion process, and deformation process of the steel cable during the impact process.

[0016] To overcome the influence of environmental factors, the position of the drive component at the moment of separation of the pin and socket can be recorded during the first impact. During the second impact, the pin and socket can be directly disconnected, allowing the drive component to move naturally to the final position of the first impact. The speed of the two final positions can be compared to eliminate the influence of environmental factors and improve accuracy.

[0017] The beneficial effects of this invention are:

[0018] This invention proposes an electromagnetically driven rocket cable separation impact response testing platform, comprising an electromagnetic drive module, a cable impact testing module, and a data analysis module. The electromagnetic drive module features rapid start-up and wear resistance, while the data analysis module offers intelligent evaluation capabilities. Compared to existing cable separation methods based on air cannons, this platform offers advantages such as ease of control, superior stability, low cost, small size, and reusability. Based on these advantages, it is expected to develop a highly reliable and safe cable separation impact response testing platform, promoting the widespread application of electromagnetic drive devices in the aerospace field. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the electromagnetically driven rocket separation cable impact response test platform of the present invention;

[0020] Figure 2 This is a schematic diagram of the electromagnetic drive controller of the present invention;

[0021] Figure 3 This is a velocity cloud diagram at a certain moment during the motion of the driving component of the present invention in close contact with the guide rail;

[0022] Figure 4 This is a schematic diagram of the two-stage sequential pulse AC power supply of the present invention;

[0023] Figure 5 This is a schematic diagram of motion feature extraction using the frame difference method of the present invention;

[0024] Figure 1 In this module, 1 is the electromagnetic drive module, 2 is the steel cable impact testing module, and 3 is the data analysis module. 11 is the sequential pulse AC power supply, 12 is a concave triangular rectangular drive component with conductive properties, 13 is the upper copper guide rail of the drive component, 14 is the lower copper guide rail of the drive component, 15 is the light source of the photoelectric sensor, 16 is the light receiver of the photoelectric sensor, 17 is the connecting wire, 21 is the steel cable, 22 is the lower fixing component, 23 is the pin, 24 is the socket, 25 is the high-speed camera, 31 is the image preprocessing unit, 32 is the frame difference algorithm, 33 is the feature extraction unit, 34 is the response analysis unit, 341 is the stress state analysis unit, 342 is the motion process analysis unit, 343 is the deformation process analysis unit, and 344 is the energy absorption analysis unit. Figure 2 In the diagram, 4 represents the electromagnetic drive controller, 41 represents the current input terminal, 42 represents the closed-loop PID controller, and 43 represents the speed of the driven component. Figure 3 This is a grayscale image of the velocity cloud during the motion of the drive component 12 in close contact with guide rails 13 and 14. Figure 4 This is a schematic diagram of the two-stage AC sequential pulse power supply of the present invention. Figure 5 This is a schematic diagram of motion feature extraction using the frame difference method. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0026] Example 1:

[0027] An electromagnetically driven rocket separation cable impact response testing platform comprises an electromagnetic drive module, a cable impact testing module, and a data analysis module.

[0028] like Figure 1 , Figure 2As shown, the electromagnetic drive module 1 consists of a sequential pulse AC power supply 11, a conductive concave triangular rectangular drive component 12, an upper copper rail 13, a lower copper rail 14, and connecting wires 17. The upper copper rail 13 is in close contact with the upper end of the conductive concave triangular rectangular drive component 12, and the lower copper rail 14 is in close contact with the lower end of the conductive concave triangular rectangular drive component 12. Together with the sequential pulse AC power supply 11 and connecting wires 17, they form a closed loop. The sequential pulse AC power supply 11 first generates short pulses with a period of 0.05 ms and a duty cycle of 16%. Under the excitation of the power supply, the upper copper rail 13 and the lower copper rail 14 generate a magnetic field around them. The conductive concave triangular rectangular drive component 12 generates a driving force for parallel movement to the right under the combined action of the electromagnetic field. Then, the sequential pulse AC power supply 11 generates long pulses... The period is 0.05ms, the duty cycle is 80%, providing acceleration for the drive component. A photoelectric sensor light source 15 is placed along one side of the upper copper guide rail 13 of the drive component, and a photoelectric sensor light receiver 16 is placed along one side of the lower copper guide rail 14 of the drive component. The speed of the drive component at its current position is calculated based on the time it blocks the main light source during its movement. This speed is transmitted to 43 in the electromagnetic drive controller 4, and the current input 41 is controlled by the PID controller 42 to obtain the ideal drive component speed. The last set of photoelectric sensors is placed at the rightmost exit of the guide rail. When the drive component reaches the exit and leaves the guide rail, its final speed is recorded. The energy loss in this module is evaluated in conjunction with the electrical energy consumed by the sequential pulse AC power supply 11. Specifically: The initial velocity V0 of the drive component at the start is recorded by the photoelectric sensor. The actual velocity V1 of the drive component when it moves to the right and leaves the guide rail is compared with the actual electrical energy E0 consumed by the sequential pulse AC power supply 11 based on the law of conservation of energy. The mass of the drive component is M. The energy consumption rate η1 in module 1 is evaluated using the following formula:

[0029]

[0030] The steel cable impact test module 2 consists of a concave triangular rectangular drive component 12 with conductive properties, a high-speed camera 25, and a steel cable 21. The steel cable 21 initially has a certain amount of slack, with its lower end fixed by a fixing component 22 and its upper end connected to a pin 23. The pin 23 is connected to a socket 24. The high-speed camera 25 is placed on the upper left side of the steel cable parallel to the pin. The drive component impacts the steel cable 21 parallel to the outlet. The concave triangular structure of the drive component is used to fix the steel cable during the impact. The high-speed camera 25 records the entire process from the start of the impact until the steel cable 21 causes the pin 23 to separate from the socket 24.

[0031] Data analysis module 3 consists of image preprocessing unit 31, frame difference calculation unit 32, feature extraction unit 33, and response analysis unit 34. The response analysis unit 34 is composed of stress state analysis unit 341, motion process analysis unit 342, deformation process analysis unit 343, and energy absorption analysis unit 344. Images captured by high-speed camera 25 are smoothed and denoised by image preprocessing unit 31 in data analysis module 3. Then, frame difference processing unit 32 divides adjacent frames into foreground and background, setting the coordinates of white pixels in the foreground image as the initial target position. Specifically, this method is as follows:

[0032] Before impact, short, equidistant marks are made on the separating steel cables. Continuous separation animation frames are recorded by a high-speed camera. Image capture algorithms are used to identify attitude changes between frames, converting this information into pixel position information, thereby obtaining the cable's attitude information. For example... Figure 5 The figure shows the corresponding graphs of a hypothetical steel cable at three times: t0, t1, and t2. The segments of the cable are labeled p0, p1, and p2. Based on the labels in the figure, the axial tensile force of the cable segment p0p1 during the time interval t0 to t1 is... for:

[0033]

[0034] in, Let p0p1 be the length of segment p0p1 at time t1. Let p0 be the length of segment p1 at time t0.

[0035] Then, the axial vibration velocity of the rope in segment p0-p1 during the time interval t0-t1. for:

[0036]

[0037] Where Δt is the sampling time of the high-speed camera.

[0038] Similarly, the axial motion characteristics of the rope segment p0 p1 during the time interval t1 to t2 can be obtained:

[0039]

[0040] Then, the axial acceleration of the rope segment p0 p1 during the time interval t0 to t2 can be expressed as:

[0041]

[0042] Similarly, the radial motion characteristics of point p1 on the rope during the time interval t0 to t2 can be obtained as follows:

[0043]

[0044] Based on the kinetic energy theorem, the energy absorbed by the steel cable during the impact process is calculated piecewise from the obtained axial and radial velocity characteristics and summed, denoted as E1. Similarly, the energy consumption rate η2 in module 2 can be evaluated based on the velocity V2 of the driving component at the moment of separation between the pin 23 and the socket 24, recorded using the frame difference method. The specific formula is as follows:

[0045]

[0046] Simultaneously, using a neural network method, the entire stress state of the steel cable is obtained by taking parameters such as axial elongation, axial velocity, axial acceleration, radial displacement, radial velocity, radial acceleration, and drive component velocity as input conditions. The motion process analysis unit 342 evaluates the motion process of the drive component and the steel cable, the stress state analysis unit 341 analyzes the stress state of the steel cable, and the deformation process analysis unit 343 analyzes the deformation process of the steel cable.

[0047] Example 2

[0048] The sequential pulse AC power supply 11 first generates a short pulse to start the circuit and provide initial power to the drive component. The pulse period is 0.05ms and the duty cycle is 16%. At the moment the short pulse ends, a long pulse is generated again with a period of 0.05ms and a duty cycle of 80%. The dynamic speed of the drive component is calculated by the light strip sensor. Combined with the control of the magnitude of the sequential pulse AC power supply 11 by the electrical drive controller 4, the actual speed of the drive component moving to the right and disengaging from the guide rail is compared with the theoretical speed that should be achieved by the actual electrical energy provided by the sequential pulse AC power supply 11. This comparison evaluates the energy consumption in module 1. The velocity of the driving component at the moment of pin-socket separation, captured by a high-speed camera and processed using the frame difference method, is used to calculate its kinetic energy difference based on the kinetic energy theorem. Simultaneously, the obtained axial and radial velocity characteristics are used to calculate the energy absorbed by the cable during the impact process segment by segment, based on the kinetic energy theorem, and these values ​​are summed to calculate the absorbed energy. This energy difference is compared with the kinetic energy difference of the driving component to evaluate the energy consumption in module 2. Furthermore, a neural network method is used, with parameters such as axial elongation, axial velocity, axial acceleration, radial displacement, radial velocity, and radial acceleration of the cable as input conditions, to obtain the stress state of the entire cable segment. To reduce the influence of other environmental factors, the final position of the driving component can be recorded in the first impact. In the second impact, the pin and socket are directly disconnected, allowing the driving component to naturally move to the final position of the first impact. The velocities of the two final positions are compared to eliminate the influence of environmental factors and improve accuracy.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Any modifications, equivalent substitutions, or improvements made based on the present invention are within the scope of protection of the present invention.

Claims

1. A rocket separation cable impact response testing platform based on electromagnetic drive, characterized in that, Electromagnetic drive module (1), steel cable impact test module (2), data analysis module (3); The electromagnetic drive module (1) includes a sequential pulse AC power supply (11), a concave triangular rectangular drive component (12) with conductive properties, an upper copper guide rail (13) of the drive component, a lower copper guide rail (14) of the drive component, and connecting wires (17). The upper copper guide rail (13) of the drive component is in close contact with the upper end of the concave triangular rectangular drive component (12) with conductive properties, and the lower copper guide rail (14) of the drive component is in close contact with the lower end of the concave triangular rectangular drive component (12) with conductive properties. Together with the sequential pulse AC power supply (11) and connecting wires (17), they form a closed loop. A light source is placed along one side of the upper copper guide rail (13) of the drive component. The light source (15) of the electric sensor is placed along the copper guide rail (14) at the lower end of the drive unit. The light receiver (16) of the photoelectric sensor is placed along the copper guide rail (14) at the lower end of the drive unit. The speed of the current position of the drive unit is calculated by the time the drive unit moves and blocks the light source. The speed is transmitted to the drive unit movement speed (43) in the electromagnetic drive controller (4). The current input terminal (41) is controlled by the closed-loop PID controller (42) to obtain the ideal speed of the drive unit. The last set of photoelectric sensors is placed at the rightmost exit of the guide rail. When the drive unit reaches the exit and leaves the guide rail, its last speed is recorded. The energy loss in this module is evaluated by combining the power used by the sequential pulse AC power supply (11). The steel cable impact test module (2) includes a concave triangular rectangular drive (12) with conductive properties, a high-speed camera (25) and a steel cable (21). The steel cable (21) has a certain amount of slack in its initial state. The lower end is fixed by the lower end fixing component (22), and the upper end is connected to the pin (23). The pin (23) is connected to the socket (24). The high-speed camera (25) is placed on the upper left side of the steel cable parallel to the pin. The drive impacts the steel cable (21) parallel from the outlet. The concave triangular structure of the drive is used to fix the steel cable during the impact. The high-speed camera (25) records the entire process from the start of the impact until the steel cable (21) drives the pin (23) to separate from the socket (24). The data analysis module (3) includes an image preprocessing unit (31), a frame difference calculation unit (32), a feature extraction unit (33), and a response analysis unit (34), wherein the response analysis unit (34) is composed of a stress state analysis unit (341), a motion process analysis unit (342), a deformation process analysis unit (343), and an energy absorption analysis unit (344); The images captured by the high-speed camera (25) are smoothed and denoised by the image preprocessing unit (31) in the data analysis module (3). The adjacent frame images are divided into foreground and background by the frame difference calculation unit (32). The coordinates of the white pixels in the foreground image are set as the initial position of the target. The position and velocity of the conductive concave triangular rectangular drive (12), the axial elongation, axial velocity, axial acceleration, radial displacement, radial velocity, and radial acceleration of the steel cable (21) are tracked and feature extracted. Based on the obtained velocity characteristics of the conductive concave triangular rectangular drive (12) impacting the steel cable (21) and causing the pin (23) to separate from the socket (24), combined with the velocity characteristics of the conductive concave triangular rectangular drive (12) at the moment of impact, the pin (23) is separated from the socket (24). 2) The final velocity when detached from the guide rail is calculated based on the kinetic energy theorem. The loss velocity of the driving component is calculated. At the same time, the axial velocity and radial velocity characteristics of the obtained cable are calculated in segments based on the kinetic energy theorem. The energy absorbed by the cable during the impact process is calculated and added together. The energy absorption is evaluated by the energy absorption analysis unit (344). Using the neural network method, the entire stress state of the cable is obtained with the axial elongation, axial velocity, axial acceleration, radial displacement, radial velocity, radial acceleration, and driving component velocity parameters as input conditions. The motion process analysis unit (342) evaluates the motion process of the driving component and the cable, the stress state analysis unit (341) analyzes the stress state of the cable, and the deformation process analysis unit (343) analyzes the deformation process of the cable.

2. The rocket separation cable impact response test platform based on electromagnetic drive as described in claim 1, characterized in that, When the sequential pulse AC power supply (11) is working, it first generates a short pulse with a pulse period of 0.05ms and a duty cycle of 16%. The copper rails (13) at the upper end of the drive component and the copper rails (14) at the lower end of the drive component generate a magnetic field around them under the excitation of the power supply. The drive component generates a driving force to move parallel to the right under the combined action of the electromagnetic field. Then the sequential pulse AC power supply (11) generates a long pulse with a pulse period of 0.05ms and a duty cycle of 80%, which provides acceleration for the drive component.

3. A rocket separation cable impact response test platform based on electromagnetic drive as described in claim 1 or 2, characterized in that, The sequential pulse AC power supply (11) is a segmented sequential pulse square wave current, with the long pulse having a duty cycle 5 times that of the short pulse.

4. The rocket separation cable impact response test platform based on electromagnetic drive as described in claim 1, characterized in that, The sequential pulse AC power supply (11) is a segmented sequential pulse square wave current, with the long pulse having a duty cycle 5 times that of the short pulse.

5. A rocket separation cable impact response testing platform based on electromagnetic drive as described in claim 1, 2, or 4, characterized in that, The electromagnetic drive controller (4) controls the dynamic movement speed of the drive component. The actual speed value of the drive component outlet measured by the photoelectric sensor is compared with the actual energy consumption value of the power supply to obtain the energy consumption in the electromagnetic drive module (1). The kinetic energy consumption of the drive component is calculated by the actual speed of the drive component outlet and the speed value captured by the high-speed camera when the steel cable is impacted and the pin is pulled to separate from the socket. At the same time, the axial and radial speed characteristics of the steel cable obtained based on the frame difference method are used to calculate the energy absorbed by the steel cable during the impact process in segments based on the kinetic energy theorem and add them together to obtain the total energy absorbed by the steel cable during the impact process. Based on the law of conservation of energy, the energy loss in the steel cable impact test module (2) is analyzed. Based on the image of the steel cable impact process captured by the high-speed camera, the neural network method is used to obtain the stress state of the entire steel cable with the axial elongation, axial speed, axial acceleration, radial displacement, radial speed, radial acceleration and drive component speed parameters as input conditions. The stress state, motion process and deformation process of the steel cable during the impact process are analyzed.

6. The rocket separation cable impact response test platform based on electromagnetic drive as described in claim 1, characterized in that, The electromagnetic drive controller (4) controls the dynamic movement speed of the drive component. The actual speed value of the drive component outlet measured by the photoelectric sensor is compared with the actual energy consumption value of the power supply to obtain the energy consumption in the electromagnetic drive module (1). The kinetic energy consumption of the drive component is calculated by the actual speed of the drive component outlet and the speed value captured by the high-speed camera when the steel cable is impacted and the pin is pulled to separate from the socket. At the same time, the axial and radial speed characteristics of the steel cable obtained based on the frame difference method are used to calculate the energy absorbed by the steel cable during the impact process in segments based on the kinetic energy theorem and add them together to obtain the total energy absorbed by the steel cable during the impact process. Based on the law of conservation of energy, the energy loss in the steel cable impact test module (2) is analyzed. Based on the image of the steel cable impact process captured by the high-speed camera, the neural network method is used to obtain the stress state of the entire steel cable with the axial elongation, axial speed, axial acceleration, radial displacement, radial speed, radial acceleration and drive component speed parameters as input conditions. The stress state, motion process and deformation process of the steel cable during the impact process are analyzed.

7. The rocket separation cable impact response test platform based on electromagnetic drive as described in claim 3, characterized in that, The electromagnetic drive controller (4) controls the dynamic movement speed of the drive component. The actual speed value of the drive component outlet measured by the photoelectric sensor is compared with the actual energy consumption value of the power supply to obtain the energy consumption in the electromagnetic drive module (1). The kinetic energy consumption of the drive component is calculated by the actual speed of the drive component outlet and the speed value captured by the high-speed camera when the steel cable is impacted and the pin is pulled to separate from the socket. At the same time, the axial and radial speed characteristics of the steel cable obtained based on the frame difference method are used to calculate the energy absorbed by the steel cable during the impact process in segments based on the kinetic energy theorem and add them together to obtain the total energy absorbed by the steel cable during the impact process. Based on the law of conservation of energy, the energy loss in the steel cable impact test module (2) is analyzed. Based on the image of the steel cable impact process captured by the high-speed camera, the neural network method is used to obtain the stress state of the entire steel cable with the axial elongation, axial speed, axial acceleration, radial displacement, radial speed, radial acceleration and drive component speed parameters as input conditions. The stress state, motion process and deformation process of the steel cable during the impact process are analyzed.

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