A flexible configuration electromagnetic propulsion acceleration device

Abstract

This invention discloses a flexibly configurable electromagnetic propulsion acceleration device, belonging to the field of electromagnetic drive. It includes a power platform I, a power platform II, a traction vehicle, a traction cable, a linear guide rail, and pulley platforms I and II. The power platforms are symmetrically arranged on both sides of the starting end of the guide rail. Their controllers are controlled via wireless communication master-slave configuration to drive the traction drum to wind and unwind the traction cable. The traction cable bypasses the pulley platforms and the vehicle-mounted pulley system, forming a W-shaped flexible traction structure, enabling the traction vehicle to accelerate and brake along the guide rail. Unpowered pulley platforms are symmetrically arranged on both sides of the end of the guide rail, their height lower than the bottom of the propelled object to avoid interference. This invention supports collaborative operation of two power platforms or independent operation of a single power platform. The traction vehicle automatically locks and unlocks via a pre-tensioning device. The structure is simple, unlocking is reliable, and deployment is flexible. It is suitable for narrow outdoor spaces, indoor spaces, and the decks of large ships, and can meet the requirements of electromagnetic-assisted takeoff for aircraft and high-speed impact testing for vehicles and equipment.

Description

Technical Field

[0001] This invention belongs to the field of electromagnetic drive, and specifically relates to a flexibly configurable electromagnetic propulsion acceleration device. Background Technology

[0002] Electromagnetic propulsion acceleration technology features stepless adjustment of propulsion force, high precision in speed and overload control, and is characterized by being silent, light-free, smoke-free, highly concealable, and requiring minimal maintenance. It is a crucial method for high-performance boost takeoff of aircraft and can also replace hydraulic power in applications such as high-speed ground testing of motor vehicles. By deploying an electromagnetically driven propulsion acceleration system on the ground and using a traction cable to pull a tractor to accelerate an object, the system's maneuverability and reliability can be greatly improved, while simultaneously increasing the frequency of propulsion acceleration and reducing system costs.

[0003] However, the propulsion system is the heaviest and largest component in the entire electromagnetic propulsion acceleration system. For ease of flexible deployment, it is typically placed on a platform. In environments with limited ground space, a pressing issue is reducing the size of the propulsion platform and optimizing the overall propulsion system layout. If the electromagnetic propulsion acceleration system is poorly designed and laid out, the propulsion platform may physically interfere with the propelled object, such as an aircraft or vehicle, potentially damaging the accelerated object or the propulsion platform during high-speed acceleration. Furthermore, achieving simple and reliable pre-tensioning for the propulsion acceleration system's tractor is a crucial issue that needs to be addressed to ensure the safe acceleration of aircraft and other propelled objects.

[0004] On the other hand, the catapult launch systems for drones and other aircraft currently in orbit, as well as the electromagnetic boost cold launch systems for missiles and rockets, are difficult to promote and apply due to their large size and high cost. There is an urgent need for a simple, reliable, and low-cost electromagnetic propulsion acceleration system. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a simple and flexibly configurable electromagnetic propulsion acceleration device. It can flexibly deploy a power platform on the ground, and the pre-tensioning mechanism of the tractor is simple and reliable, enabling safe and reliable acceleration of objects such as aircraft and vehicles.

[0006] The technical solution of the present invention is as follows:

[0007] A flexibly configured electromagnetic propulsion acceleration device includes a power platform one, a power platform two, a traction vehicle, a traction cable, a linear guide rail, a pulley platform one, and a pulley platform two. Power platforms one and two provide electromagnetic torque to accelerate the traction vehicle and the object being propelled, converting the electromagnetic torque into linear traction force of the traction cable to pull the traction vehicle and propel the accelerated object. After the traction vehicle reaches a first control line, the power platform provides braking force to stop the traction vehicle at a predetermined position. Simultaneously, the traction vehicle and the object being propelled are unlocked and separated, allowing the object to continue moving. The linear guide rail is laid flat on the ground in a straight line. The traction vehicle is placed on top of the linear guide rail, with its wheels touching the ground and running along the linear guide rail. The traction vehicle's power comes from the power platform. Pulley platforms one and two are used to convert the direction of the traction cable's tension and are arranged at the ends of the linear guide rail.

[0008] Furthermore, Power Platform 1 and Power Platform 2 are symmetrically placed on both sides of the starting end of the linear guide rail. The distance L between the two power platforms is greater than the contour length of the object being propelled perpendicular to the direction of the linear guide rail, and the distance between each power platform and the linear guide rail is L / 2.

[0009] Power platform one and power platform two each include at least a controller, a generator set, an energy storage device, a drive converter, a drive motor, a traction drum, and a power platform pulley block; the controller controls the energy storage device, the drive converter, and the drive motor. The controller of power platform one is the master controller, and the controller of power platform two is the slave controller controlled by the master controller. The two exchange information through wireless communication or optical fiber.

[0010] Furthermore, one end of the traction cable is fixed to the traction drum of power platform one, and the other end passes through the pulley block of power platform one, pulley platform one, vehicle-mounted pulley block, pulley platform two, and pulley block of power platform two, and is then fixed to the traction drum of power platform two, forming a W-shaped flexible propulsion and acceleration system.

[0011] Furthermore, based on the principle that the object being pushed does not interfere with the two pulley platforms while running along the linear guide rail, the distance D between the two pulley platforms is set, and the distance between each pulley platform and the linear guide rail is D / 2. The total height H0 of pulley platforms one and two is less than the distance H1 from the bottom of the object being pushed to the ground.

[0012] Furthermore, the acceleration, deceleration, and braking methods for the tractor are as follows:

[0013] The tractor accelerates:

[0014] The controller controls the forward rotation of the traction drums of power platform one and power platform two. The two ends of the traction cable are quickly wound up on the surfaces of the two traction drums. The traction cable passes through pulley platform one and pulley platform two, passes through the pulley block of the tractor vehicle, and pulls the tractor vehicle to accelerate along the ground linear guide rail.

[0015] Tractor deceleration and braking: When the tractor runs to the first control line, i.e. the deceleration line, the controller controls the drive motors of power platform one and power platform two and the traction drum to brake synchronously and quickly; when the tractor runs to the second control line, i.e. the center line of pulley platform one and pulley platform two, the traction drum stops rotating. Under the action of the inertial force of the tractor, the tractor leaves the second control line, the traction drum immediately begins to rotate in the opposite direction, and the traction cable is released from the traction drum. After the tractor crosses the second control line and runs a certain distance, it stops under the braking torque of the drive motor.

[0016] Furthermore, the linear guide rail is made of metal, and its shape is designed according to the guiding method of the tractor. The length of the linear guide rail is set according to the speed and acceleration of the object being propelled and accelerated. The length of the end of the linear guide rail is at least greater than the third control line, that is, the line connecting the ends of pulley platform one and pulley platform two, to prevent the object being propelled and accelerated from changing its running direction due to unexpected reasons after leaving the linear guide rail, which would cause the support wheel of the object being propelled and accelerated to collide with pulley platform one or pulley platform two.

[0017] Furthermore, the propulsion and acceleration system uses only one power platform for operation. The power platform is located on one side of the starting end of the linear guide rail, and the distance between the power platform and the linear guide rail is greater than half the profile length of the object being propelled in the direction perpendicular to the linear guide rail.

[0018] Furthermore, one end of the traction cable is fixed to the traction drum of the power platform one, and the other end is fixed to the pulley platform two through the pulley block of the power platform one, the pulley platform one, and the traction vehicle-mounted pulley block, forming a type IV flexible propulsion and acceleration system.

[0019] The two pulley platforms consist of a chassis, moving wheels, platform pulley blocks, platform legs, and a hydraulic mechanism. The hydraulic mechanism fixes the platform legs to the ground, and the platform legs support the unpowered pulley platforms at a certain angle to the ground.

[0020] Furthermore, in situations where electromagnetic boost takeoff of aircraft is conducted at a fixed site, or high-speed impact tests of vehicles and equipment are performed, two pulley platforms can be fixedly installed or fixed in a concrete pit. When working, the platforms are raised above the ground, and when not working, they are lowered to the bottom of the pit to avoid affecting the passage of other equipment or vehicles and to make full use of the space.

[0021] An automatic pre-tensioning device for the tractor is installed between the starting point of the linear guide rail and the tail beam of the tractor. The pre-tensioning device includes a tension cable, a slot, a tension pin, and bolts. The tension cable is fixed to both sides of the linear guide rail by its end latches and bolts. The slot is embedded in the tail beam of the tractor, and the tension pin is inserted into the slot and the hole in the tail beam. The tension cable restricts the tractor to its initial position on the guide rail. The power of the tractor itself and the power of the accelerated object are insufficient to break the tension pin. When the power platform outputs power to accelerate the tractor through the traction cable, the tension pin in the slot breaks, the tractor separates from the tensioning mechanism, and the tractor accelerates along the guide rail.

[0022] Furthermore, the maximum power of the propelled object itself, F0, is less than the tension pin cutting force, F, which is less than the traction force of the power vehicle, F1.

[0023] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory, and do not limit the invention.

[0024] The beneficial effects of this invention are as follows:

[0025] This invention provides a flexibly configurable electromagnetic propulsion acceleration device, which features low cost and flexible deployment of the propulsion acceleration system. The automatic pre-tensioning device of the tractor is simple to lock and reliable to unlock, and can quickly and continuously propel and accelerate the takeoff of the aircraft. It is particularly suitable for deployment in relatively narrow environments, such as ordinary field aprons, roads, indoor spaces, and the decks of large ships, for electromagnetic boost takeoff of aircraft.

[0026] In addition, it is suitable for applications in confined indoor spaces, meeting the growing demand for impact testing of vehicles and industrial equipment, such as ground overload testing and aerodynamic testing of motor vehicles.

[0027] By arranging the system proposed in this invention on a launch track with a certain angle, it can be applied to the catapult takeoff of unmanned aerial vehicles, or the electromagnetic boost cold launch of pre-accelerated missiles, rockets, etc. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings of the embodiments will be further described below. The present invention includes, but is not limited to, the accompanying drawings described below. That is to say, the accompanying drawings do not represent all embodiments of the present invention, but are only one of the embodiments.

[0029] Figure 1 This is a general layout diagram of the flexibly configured electromagnetic propulsion acceleration device according to an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the power platform according to an embodiment of the present invention;

[0031] Figure 3This is a schematic diagram showing the separation of the aircraft from the tractor unit of this invention;

[0032] Figure 4 This is a general layout diagram of the electromagnetic propulsion acceleration device with flexible configuration using a single power platform according to the present invention;

[0033] Figure 5 This is a schematic diagram of the pulley platform according to an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the automatic pre-tensioning mechanism for a tractor according to an embodiment of the present invention.

[0035] Figure label:

[0036] 1. Power Platform 1, 2. Power Platform 2, 3. Tractor, 4. Linear Guide Rail, 5. Pulley Platform 1, 6. Pulley Platform 2, 7. Traction Cable, 8. Controller, 11. Generator Set, 12. Energy Storage Device, 13. Drive Converter, 14. Drive Motor, 15. Traction Drum, 16. First Pulley Block, 17. Second Pulley Block, 18. First Control Line, 20. Second Control Line, 21. Third Control Line, 22. Pulley Platform Chassis, 61. Moving Wheel, 62. Hydraulic Mechanism, 63. Platform Pulley Block, 64. Hydraulic Outrigger, 65. Tension Cable, 70. Bolt, 71. Slot, 72. Tensioning Pin, 73. Tractor Tail Beam, 31. Detailed Implementation

[0037] The implementation of the embodiments is described more fully below with reference to the accompanying drawings.

[0038] Figure 1 This is an embodiment of the dual-power platform electromagnetic propulsion acceleration system of the present invention, including a power platform 1, a power platform 2, a tractor 3, a linear guide rail 4, a pulley platform 5, a pulley platform 6, and a traction cable 8. Power platforms 1 and 2 provide electromagnetic torque to accelerate the tractor and the object, converting the electromagnetic torque into linear traction force on the traction cable to pull the tractor 3 and propel the object. After the tractor 3 reaches the first control line 20, the power platforms provide braking force to stop the tractor at a predetermined position. Simultaneously, the tractor 3 and the propelled object are unlocked and separated, allowing the propelled object to continue moving.

[0039] The tractor 3 is used to propel and accelerate an object while simultaneously constraining it to move along the linear guide rail 4. The tractor 3 is powered by a power platform and includes at least wheels, a frame, guide wheels to constrain the tractor, a pulley system, and a propulsion arm to propel the object. The linear guide rail 4 constrains the left and right guide wheels mounted below the tractor 3, ensuring that the tractor 3 can only move along the linear guide rail 4.

[0040] Pulley platforms 5 and 6 are used to change the direction of the tension in the traction cable. They are placed at the end of the straight track, i.e., on the side where the accelerated object leaves the straight track. The pulley platforms are small in size, especially in height, and the pulleys do not need to be too far from the straight track, as long as they do not interfere with the accelerated object. This makes them more adaptable to different sites and allows for more flexible configuration.

[0041] The traction cable 8 is used to convert the torque of the drive motor on the power platform into the tension of the traction cable, which pulls the tractor to accelerate or brake, thereby propelling the object to accelerate.

[0042] Linear guide rail 4 is laid flat on the ground in a straight line. The tractor 3 is placed above the linear guide rail 4, below or behind the object being accelerated, to propel the aircraft or vehicle to accelerate. The wheels of the tractor 3 touch the ground and run along the linear guide rail 4. The landing gear tires of the aircraft touch the ground and roll. The tires of other test vehicles also touch the ground and roll.

[0043] Power platform 1 and power platform 2 are placed symmetrically on both sides of the starting end of linear guide rail 4. The distance L between the two power platforms is greater than the outline length of the object being accelerated perpendicular to the direction of the linear guide rail. The distance between each power platform and the linear guide rail is L / 2.

[0044] Pulley platform 1 (5) and pulley platform 2 (6) are placed mirror-symmetrically on both sides of the end of linear guide rail 4. Based on the principle that the object being pushed does not interfere with the two pulley platforms while running along linear guide rail 4, the distance D between the two pulley platforms is designed, and the distance D / 2 between each pulley platform and the linear guide rail is also designed.

[0045] Furthermore, the height H0 of pulley platform 5 and pulley platform 6, which are placed mirror-symmetrically on both sides of the end of the guide rail, is less than the distance H1 from the bottom of the object being pushed to the ground.

[0046] Figure 2 This is a layout diagram of the power platform. Power platform 1 and power platform 2 have the same composition and function, each including at least a controller 11, a generator set 12, an energy storage device 13, a drive converter 14, a drive motor 15, a traction drum 16, and a first pulley block 17. The controller 13 controls the operation of the energy storage device 11, the drive converter 14, and the drive motor 15. The energy storage device 13, the drive converter 14, and the drive motor 15 are connected by cables. The controller of power platform 1 is the master controller, and the controller of power platform 2 is the slave controller controlled by the master controller. The two exchange information wirelessly.

[0047] One end of the traction cable 8 is fixed to the traction drum 16 of the power platform 1, and the other end passes through the first pulley block 17, pulley platform 5, vehicle-mounted pulley block, pulley platform 2 6, and the second pulley block 18 of the power platform 2, and is then fixed to the traction drum of the power platform 2, forming a W-shaped flexible propulsion acceleration system.

[0048] Figure 3 This is a schematic diagram of the separation process between the tractor and the aircraft in this invention. The acceleration, deceleration, and braking methods of the tractor are as follows:

[0049] The tractor accelerates:

[0050] The main controller controls the traction drums of power platform 1 and power platform 2 to rotate in the forward direction. The two ends of the traction cable 8 are quickly wound up on the surfaces of the two traction drums. The traction cable 8 passes through pulley platform 1 5 and pulley platform 2 6, passes through the traction vehicle pulley block, and pulls the traction vehicle 3 to accelerate along the ground linear guide rail 4.

[0051] Tractor deceleration and braking: When the tractor 3 runs to the first control line 20, also known as the deceleration line, the controller 11 controls the drive motors of power platform 1 and power platform 2 and the traction drum to brake synchronously and quickly. When the tractor 3 runs to the second control line 21, that is, the center line between pulley platform 5 and pulley platform 6, the drive motor and the traction drum stop rotating. Under the action of the inertial force of the tractor 3, the tractor 3 crosses the second control line 21, and the traction drum immediately begins to rotate in the opposite direction and releases the traction cable 8 from the traction drum. After the tractor 3 runs a certain distance after crossing the second control line 21, it stops under the action of the braking torque of the drive motor.

[0052] The linear guide rail 4 is made of metal. The shape of the linear guide rail 4 is designed according to the guiding method of the tractor 3. The length of the linear guide rail 4 is set according to the speed and acceleration of the object being pushed and accelerated. The length of the end of the linear guide rail 4 is at least greater than the third control line 22, that is, the end lines of pulley platform 1 5 and pulley platform 2 6, to prevent the object being pushed and accelerated from changing its running direction due to unexpected reasons after leaving the linear guide rail 4, which would cause the support wheel of the object being pushed and accelerated to collide with pulley platform 1 5 or pulley platform 2 6.

[0053] Figure 4 This is an embodiment of the single-power platform propulsion acceleration of the present invention. The propulsion acceleration system uses only power platform 1 as the power source. Power platform 1 is arranged on one side of the starting end of linear guide rail 4. The distance between power platform 1 and linear guide rail 4 is greater than half the outline length of the object being propelled in the direction perpendicular to the linear guide rail.

[0054] One end of the traction cable 8 is fixed to the traction drum 16 of the power platform 1, and the other end is fixed to the pulley platform 6 via the first pulley block 17, the pulley platform 5, and the vehicle-mounted pulley block, forming a type IV flexible propulsion and acceleration system.

[0055] Figure 5In this embodiment of the pulley platform of the present invention, a movable wheel 62 is arranged under the pulley platform chassis 61 for easy movement, and a hydraulic outrigger 65 is used to resist the tension of the traction cable. A platform pulley block 64 and a hydraulic mechanism 63 are arranged on the platform, and the hydraulic mechanism 63 fixes the hydraulic outrigger 65 to the ground.

[0056] Figure 6 In this embodiment of the automatic pre-tensioning device for the tractor, an automatic pre-tensioning device is installed between the starting point of the linear guide rail 4 and the tail beam 31 of the tractor. The pre-tensioning device includes a tension cable 70, a slot 72, a bolt 71, and a tension pin 73. The tension cable 70 is fixed to both sides of the linear guide rail 4 by a locking buckle at its end and a bolt 71. The slot 72 is embedded in the tail beam 31 of the tractor. The tension pin 73 is inserted into the slot 72 and the hole in the tail beam 31 of the tractor. The tension cable 70 restricts the tractor 3 to the initial position of the linear guide rail 4. The power of the tractor 3 itself and the power of the accelerated object are insufficient to break the tension pin 73. When the power platform outputs power to pull the tractor 3 through the traction cable 8 to accelerate, the tension pin 73 in the slot 72 breaks, the tractor 3 separates from the tensioning mechanism, and the tractor 3 accelerates along the linear guide rail 4.

[0057] The tension pin 73 is a hard aluminum alloy cylindrical bar, and the cutting force F of the tension pin is less than the traction force F1 of the power platform.

[0058] Furthermore, the maximum power of the propelled object itself, F0, is less than the tension pin cutting force, F, and the traction force of the power platform, F1.

[0059] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A flexibly configurable electromagnetic propulsion acceleration device, characterized in that, It includes a power platform one, a power platform two, a tractor, a traction cable, a linear guide rail, and pulley platforms one and two. Power platforms one and two provide electromagnetic torque to accelerate the tractor and the object being propelled, converting the electromagnetic torque into linear traction force of the traction cable to pull the tractor and propel the object. After the tractor reaches the first control line, the power platform provides braking force to stop the tractor at the predetermined position. At the same time, the tractor and the object being propelled are unlocked and separated, and the object continues to move. The linear guide rail is laid flat on the ground in a straight line. The tractor is placed on the linear guide rail, and the tractor wheels touch the ground and run along the linear guide rail. The power of the tractor comes from the power platform. Pulley platforms one and two are used to change the direction of the traction cable tension and are arranged at the ends of the linear guide rail.

2. The flexibly configurable electromagnetic propulsion acceleration device according to claim 1, characterized in that, Power platform one and power platform two are symmetrically placed on both sides of the starting end of the linear guide rail. The distance L between the two power platforms is greater than the contour length of the object being propelled perpendicular to the linear guide rail. The distance between each power platform and the linear guide rail is L / 2.

3. The flexibly configurable electromagnetic propulsion acceleration device according to claim 1, characterized in that, Power platform one and power platform two each include at least a controller, a generator set, an energy storage device, a drive converter, a drive motor, a traction drum, and a power platform pulley block; the controller controls the energy storage device, the drive converter, and the drive motor. The controller of power platform one is the master controller, and the controller of power platform two is the slave controller and is controlled by the master controller. The two exchange information through wireless communication or optical fiber.

4. The flexibly configurable electromagnetic propulsion acceleration device according to claim 1, characterized in that, Pulley platform one and pulley platform two are designed based on the principle that the object being pushed will not interfere with the two pulley platforms as it runs along the linear guide rail. The distance between the two pulley platforms is D, and the distance between each pulley platform and the linear guide rail is D / 2. The height H0 of pulley platform one and pulley platform two is less than the distance H1 from the bottom of the object being pushed to the ground.

5. The flexibly configurable electromagnetic propulsion acceleration device according to claim 1, characterized in that, One end of the traction cable is fixed to the traction drum of power platform one, and the other end passes through the pulley block of power platform one, pulley platform one, vehicle-mounted pulley block, pulley platform two, and power platform two pulley block, and is then fixed to the traction drum of power platform two, forming a flexible W-shaped structure. The acceleration, deceleration, and braking methods of the tractor are as follows: The controller controls the forward rotation of the traction drums of power platform one and power platform two. The two ends of the traction cable are quickly wound up on the surfaces of the two traction drums. The traction cable passes through pulley platform one and pulley platform two, passes through the pulley block of the tractor vehicle, and pulls the tractor vehicle to accelerate along the ground linear guide rail. When the tractor reaches the first control line, i.e. the deceleration line, the controller controls the drive motors of power platform one and power platform two and the traction drum to brake synchronously and quickly. When the tractor reaches the second control line, i.e. the center line of pulley platform one and pulley platform two, the drive motors and the traction drum stop rotating. Under the action of the inertial force of the tractor, the tractor crosses the second control line, and the traction drum immediately begins to rotate in the opposite direction and releases the traction cable from the traction drum. After the tractor has traveled a certain distance after crossing the second control line, it stops under the braking torque of the drive motor.

6. The flexibly configurable electromagnetic propulsion acceleration device according to claim 1, characterized in that, The linear guide rail is made of metal. Its shape is designed according to the guiding method of the tractor. The length of the linear guide rail is set according to the speed and acceleration of the object being pushed and accelerated. The length of the end of the linear guide rail is at least greater than the end lines of pulley platform one and pulley platform two to prevent the object being pushed and accelerated from changing its running direction due to unexpected reasons after leaving the linear guide rail, which would cause the support wheel of the object being pushed and accelerated to collide with pulley platform one and pulley platform two.

7. The flexibly configurable electromagnetic propulsion acceleration device according to claim 5, characterized in that, The flexibly configured electromagnetic propulsion acceleration device uses only one power platform as its power source. The power platform is located on one side of the starting end of the linear guide rail. The distance between the power platform and the linear guide rail is greater than half the outline length of the object being propelled in the direction perpendicular to the linear guide rail. One end of the traction cable is fixed to the traction drum of the power platform, and the other end is fixed to the pulley platform 2 through the pulley block of the power platform, the pulley platform 1, and the vehicle-mounted pulley block, forming a flexible type IV structure.

8. The flexibly configurable electromagnetic propulsion acceleration device according to claim 1, characterized in that, The two pulley platforms consist of a chassis, moving wheels, platform pulley blocks, platform legs, and a hydraulic mechanism. The hydraulic mechanism fixes the platform legs to the ground, and the platform legs support the two pulley platforms at a certain angle to the ground.

9. The flexibly configurable electromagnetic propulsion acceleration device according to claim 1, characterized in that, A pre-tensioning device for the tractor is installed between the starting point of the linear guide rail and the tail beam of the tractor. The pre-tensioning device includes a tension cable, a slot, a tension pin, and bolts. The tension cable is fixed to both sides of the linear guide rail by the locking buckle at its end and the bolts. The slot is embedded in the tail beam of the tractor. The tension pin is inserted into the slot and the hole in the tail beam of the tractor. The tension cable restricts the tractor to the initial position of the guide rail. The power of the tractor and the power of the accelerated object are insufficient to break the tension pin. When the power platform outputs power to pull the tractor to accelerate through the traction cable, the tension pin in the slot breaks, the tractor separates from the tensioning mechanism, and the tractor accelerates along the guide rail.

10. A flexibly configurable electromagnetic propulsion acceleration device according to claim 8, characterized in that, The maximum power of the object being propelled is F0 < the cutting force of the tension pin is F < the traction force of the power platform is F1.

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