Dropping type low-speed wind tunnel test model ejection mechanism

Abstract

The invention discloses a launching type low-speed wind tunnel test model ejection mechanism which comprises a base, and a sliding rail table for a launched object to slide is fixed above the base; the energy storage assembly is fixed to the base and provides energy for sliding and propelling of a thrown object. The propelling assembly is connected to the base in a sliding mode, the propelling assembly is located at the end of the thrown object and pushes the thrown object to move on the sliding rail table, and the energy storage assembly is connected with the propelling assembly and provides propelling kinetic energy; the dragging assembly is installed on the edge of one end of the base, and the dragging assembly is connected with the propelling assembly through a hook and can drive the propelling assembly to move on the base. The positioning assembly is installed on one side of the sliding rail table, the position of the positioning assembly can be adjusted, and the positioning assembly is used for limiting the initial position of a thrown object. The laser range finder is installed on the base and used for measuring position information of the propelling assembly and the thrown object and resolving the movement speed, the structure is simple, use is convenient, and compared with a traditional free sliding throwing mode, accurate control over the cabin exiting speed of the thrown object is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of low-speed wind tunnel launch tests, and in particular relates to a launch-type low-speed wind tunnel test model ejection mechanism. Background Art

[0002] As an effective means to study the multi-body separation problem, wind tunnel model release test has been widely used in the study of multi-body separation problems of aircraft. At present, the research on aircraft release objects is carried out from two aspects: numerical calculation and wind tunnel test.

[0003] In the low-speed wind tunnel test of airdropping objects in the transport cabin, the dropped objects usually slide freely out of the cabin along the guide rails placed in the cabin at a certain angle of attack and under the action of gravity, and separate from the carrier platform. This method cannot accurately control the speed of the dropped objects leaving the cabin, which affects the accuracy and repeatability of the test data and poses a certain threat to the safety of the carrier platform.

[0004] Therefore, how to provide a low-speed wind tunnel test model ejection mechanism for a launch type that can monitor and control the motion parameters of the launched object in real time is a problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] In view of this, the present invention provides a launching mechanism for a low-speed wind tunnel test model, which can monitor and control the motion parameters of the launched object in real time, thereby ensuring the accuracy and repeatability of the test data.

[0006] In order to achieve the above object, the present invention adopts the following technical solution: a launching mechanism for a low-speed wind tunnel test model, comprising:

[0007] A base, a slide rail platform for sliding objects is fixed on the top of the base;

[0008] An energy storage component, the energy storage component is fixed on the base and provides energy for sliding and propelling the object being launched;

[0009] A propulsion assembly, wherein the propulsion assembly is slidably connected to the base, the propulsion assembly is located at the end of the object to be delivered and pushes the object to be delivered to move on the slide rail platform, and the energy storage assembly is connected to the propulsion assembly and provides propulsion kinetic energy;

[0010] A dragging assembly, the dragging assembly being mounted on an edge of one end of the base, the dragging assembly being connected to the propulsion assembly via a hook and being capable of driving the propulsion assembly to move on the base;

[0011] A positioning component, the positioning component is installed on one side of the slide platform, the position of the positioning component on the slide platform is adjustable and is used to limit the initial position of the object to be placed on the slide platform;

[0012] A laser rangefinder is installed on the base and is used to measure the position information of the propulsion component and the object being launched, and to calculate the movement speed.

[0013] The beneficial effects of the present invention are as follows: the energy storage component provides energy for the propulsion of the object being launched. When implemented specifically, the predetermined exit parameters (attitude angle, exit speed) of the object being launched can be solved into the initial energy storage parameters of the power source. The positioning component is used to lock the object being launched. After the object is unlocked and moves, a laser rangefinder is used to monitor the motion parameters of the object being launched in real time. When applied, the angle of attack of the carrier platform is simulated by changing the inclination angle of the base, and the exit speed of the object being launched is controlled by controlling the energy storage size of the energy storage component. The speed at which the object leaves the slide rail is the exit speed.

[0014] Preferably, a guide rail is fixed on the base and corresponds to the length direction of the base, the propulsion assembly is slidably connected to the guide rail, the slide rail platform is fixed above the base, and long groove seats for fixedly connecting the positioning assembly are provided on both sides of the slide rail platform, the guide rail is arranged close to one end of the base, and the slide rail platform is arranged close to the other end of the base.

[0015] The resulting technical effect is: the guide rail provides a guiding basis for the propulsion assembly, ensuring the directional propulsion process of the propulsion assembly on the object to be launched; the slide platform is a sliding platform for the object to be launched, which can accurately guide the movement of the object to be launched; the positioning assembly is used to locate the initial position of the object to be launched on the slide platform; according to the appearance of the different objects to be launched, the installation position of the positioning assembly and the interface shape of the slide platform can be changed to improve the versatility of the test. It should be noted that when the object to be launched is launched, the inclined arrangement angle of the base can simulate the angle of attack of the carrier platform, thereby simulating the test of the exit speed of the launched object under specific parameters.

[0016] Preferably, the actuator of the energy storage assembly includes a tension spring or a high-pressure gas storage tank or a piston or a cylinder.

[0017] The resulting technical effect is that the core actuator of the energy storage component can have multiple forms, and tension spring energy storage is only one of them. In specific implementation, it can also be a high-pressure gas tank cold launch module with compressed air as the power source, which prompts the propulsion component to push the object to be launched. It can also be a cylinder / piston hot launch module with high-pressure gas generated by gunpowder combustion as the power source, which prompts the propulsion component to push the object to be launched.

[0018] Preferably, the tension spring is parallel to the base and fixed on the bottom side of the base, one end of the tension spring is fixed on the bottom wall of the base, the other end of the tension spring is connected to a steel wire rope, a pulley for guiding the direction of the steel wire rope is provided on the base, and the steel wire rope passes around the pulley and through the rope hole on the base and then is connected to the propulsion assembly.

[0019] The resulting technical effect is: using steel wire ropes to achieve the connection between the energy storage component and the propulsion component, and a pulley is necessary to cooperate with the steel wire ropes. The steel wire ropes can reduce spatial limitations, and the connection is reliable and convenient.

[0020] Preferably, the propulsion assembly includes a sliding tube seat, a push plate frame, a push plate and a buffer compression spring. The sliding tube seat is a square tube structure, the sliding tube seat is slidably connected to the guide rail, one end of the sliding tube seat is fixed with a hanging ear, the dragging assembly is connected to the hanging ear through a hook, the push plate frame is fixed to the top of the other end of the sliding tube seat, the push plate frame is slidably connected to the slide rail platform, the push plate is fixed on the push plate frame and pushes the thrown object to move, the buffer compression spring is located inside the sliding tube seat and one end is fixedly connected to the sliding tube seat, and the other end is connected to a travel slider, the travel slider is slidably connected to the inner side of the sliding tube seat, and the steel wire rope is connected to the travel slider.

[0021] The resulting technical effect is: the dual guiding effect of the sliding tube seat and the push plate frame makes the push plate slide reliably and stably. It should be noted that the travel slider is restricted inside the sliding tube seat. Therefore, the wire rope establishes the connection between the energy storage component and the propulsion component. During operation, due to the completion of the work of the energy storage component, the sliding tube seat will continue to move forward due to inertia. At this time, the buffer compression spring is used to unload the energy of the sliding tube seat and the push plate, thereby reducing the impact of the sliding tube seat on other components.

[0022] Preferably, a limit seat is provided on the base and close to the other end of the sliding tube seat. When the sliding tube seat moves at high speed, it can slide on the outside of the limit seat. The limit seat limits the terminal sliding stroke of the sliding tube seat. The limit seat is provided with a hole for passing the wire rope, and the end of the limit seat is rotatably connected to a wire rope reversing wheel.

[0023] The resulting technical effect is: the limit seat is used to limit the stroke of the sliding tube seat, and when the travel slider abuts against the end of the limit seat, the buffer compression spring unloads the energy of the propulsion assembly. It can be understood that when the sliding tube seat and the travel slider slide to the limit seat, the travel slider is limited by the limit seat and no longer moves, while the sliding tube seat continues to slide onto the limit seat by inertia, and at this time the energy is unloaded by relying on the compression of the buffer compression spring.

[0024] Preferably, the dragging assembly includes a screw sliding portion and a hook connecting portion, the screw sliding portion is driven by a driving motor, and the sliding seat on the screw sliding portion is connected to the hook connecting portion and drives the hook connecting portion to move.

[0025] The resulting technical effect is: relying on the drive motor to control the movement of the sliding seat, this process can also be related to the energy storage component, storing energy in the energy storage component, the ear connection can quickly cut off the connection between the towing component and the propulsion component to ensure the work of the energy storage component.

[0026] Preferably, the hook connection part includes a mounting seat, an electromagnet and a hook member, the mounting seat is fixed on the sliding seat and a tension sensor is connected between the mounting seat and the sliding seat, the mounting seat is connected to a hinged seat, the hook member is a hook and is rotatably connected to the hinged seat through a pin shaft, one end of the hook member is a magnetic end, and the other end is a hook end, the electromagnet attracts the magnetic end and controls the hook end to swing and hang on the hook of the propulsion assembly.

[0027] The resulting technical effect is: relying on the magnetic attraction of the electromagnet on the hook part, the hook part is swung, thereby completing the rapid connection and disconnection process between the towing component and the propulsion component, and the tension sensor can detect the tension value of the spring, thereby realizing the monitoring and control of the energy storage component.

[0028] Preferably, the positioning assembly includes a servo seat, a servo and a positioning rod, the servo seat is connected to one side of the slide rail platform, the servo is fixedly connected to the top of the servo seat, the positioning rod is connected to the output shaft of the servo, the positioning rod rotates driven by the output shaft of the servo, a slot is provided on the outer side wall of the object to be launched, the positioning rod is snapped into the slot and limits the initial movement state of the object to be launched.

[0029] The resulting technical effect is: the rotation of the positioning rod is controlled by the servo, and the position of the object is locked by the locking relationship between the positioning rod and the slot on the object to be released. When testing is required, the positioning rod can be controlled to release the lock on the object to be released.

[0030] Preferably, the laser rangefinder includes a first laser rangefinder and a second laser rangefinder, the first laser rangefinder is fixed to one end edge of the base, the object to be launched is located on the detection path of the first laser rangefinder, the second laser rangefinder is fixed in the middle of the base, and the propulsion assembly is located on the detection path of the second laser rangefinder.

[0031] The resulting technical effect is: the laser rangefinder can feedback real-time data of the displacement of the irradiated target (such as a push plate or a dropped object, etc.) changing with time, and the real-time speed information of the target can be obtained through secondary calculation by the software. The first laser rangefinder can monitor the real-time speed of the push plate (dropped object), and the second laser rangefinder can monitor the real-time position of the propulsion component, and then solve the spring stretching length, and compare it with the preset value. After feedback to the motor, a closed-loop control is formed for the dragging component to achieve precise control of the energy storage component. It can be understood that the first laser rangefinder is used for position and speed detection of the dropped object, while the second laser rangefinder is used for data feedback when the energy storage component is storing energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a main structural diagram of a launching mechanism for a low-speed wind tunnel test model of the present invention;

[0033] Figure 2 This is a front view of a launching mechanism for a low-speed wind tunnel test model of the present invention;

[0034] Figure 3 It is a side view of a launching mechanism of a low-speed wind tunnel test model of the present invention;

[0035] Figure 4 It is a bottom and side view of a launching mechanism of a low-speed wind tunnel test model of the present invention;

[0036] Figure 5 It is a schematic diagram of the internal components of a launching mechanism of a low-speed wind tunnel test model of the present invention;

[0037] Figure 6 It is an enlarged schematic diagram of point A of the present invention;

[0038] Figure 7 It is a schematic diagram of the installation of the ear connection part of the ejection mechanism of a low-speed wind tunnel test model of a launch type according to the present invention;

[0039] Figure 8 This is a partial large-scale drawing of the propulsion assembly and the slide rail platform of the ejection mechanism of a low-speed wind tunnel test model of the present invention;

[0040] Fig. 9 This is a test principle diagram of the present invention.

[0041] 1 base, 2 slide rail platform, 3 energy storage component, 301 tension spring, 302 wire rope, 4 propulsion component, 401 sliding tube seat, 402 push plate frame, 403 push plate, 404 buffer compression spring, 405 travel slider, 5 object to be thrown, 6 drag component, 601 screw rod sliding part, 6011 drive motor, 6012 sliding seat, 602 hanging ear connection part, 6021 mounting seat, 6022 electromagnet, 6023 hook connection part, 7 positioning component, 701 steering gear seat, 702 steering gear, 703 positioning rod, 8 laser rangefinder, 801 first laser rangefinder, 802 second laser rangefinder, 9 guide rail, 10 long groove seat, 11 pulley, 12 hanging ear, 13 limit seat, 14 wire rope reversing wheel, 15 tension sensor, 16 card slot. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] Taking the spring mechanism as an energy storage energy example, the predetermined exit parameters (attitude angle, exit speed) of the launched object are solved into the initial energy storage parameters of the energy storage energy. During the movement of the launched object after it is unlocked, the feedback data from tension sensors, laser rangefinders, etc. are used to realize real-time monitoring and control of the movement parameters of the launched object.

[0044] Reference Fig. 9 Principle: The tension spring is stretched (or compressed) by L to store energy, and then the object is put in. The elastic force of the tension spring pushes the object to move a distance of L, and the speed is from 0 to V. 出舱 The corresponding formula for the movement process of the object being thrown is as follows:

[0045] 0.5·k·L 2 +M·g·L·sinα=μ·M·g·cosα·L+0.5·M·v 2

[0046] That is, the potential energy of the ejection system is converted into kinetic energy. In the formula, k is the spring elastic coefficient, M is the total mass of the moving parts (the object to be launched and the propulsion component), g is the acceleration of gravity, μ is the friction coefficient between the moving parts and the fixed parts (such as the slide rail), 0.5·k·L 2 +M·g·L·sinα is the elastic potential energy and gravitational potential energy of the moving part at the initial launch position, μ·M·g·cosα·L is the frictional internal energy loss of the moving part during the ejection process, 0.5·M·v 2Before using the mechanism, it is only necessary to calibrate or weigh the friction coefficient of each sliding track segment, the mass of each moving object, the spring elastic coefficient, the initial angle of attack of the carrier platform (base), and combine it with the specified exit speed of the object to be launched, and then the initial launch distance (initial stretch or compression length of the spring) of the object to be launched can be calculated.

[0047] See the attached Figures 1 to 9 According to an embodiment of the present invention, a launching mechanism for a low-speed wind tunnel test model includes:

[0048] A base 1, a slide rail 2 for sliding objects 5 is fixed on the top of the base 1;

[0049] An energy storage component 3, which is fixed on the base 1 and provides energy for sliding and propelling the object being put;

[0050] A propulsion assembly 4 is slidably connected to the base 1. The propulsion assembly 4 is located at the end of the object 5 to be placed and pushes the object to move on the slide rail 2. The energy storage assembly 3 is connected to the propulsion assembly 4 and provides propulsion kinetic energy.

[0051] The dragging assembly 6 is installed on one end edge of the base 1, and the dragging assembly 6 is detachably connected to the propulsion assembly 4 and can drive the propulsion assembly 4 to move on the base;

[0052] A positioning component 7, which is installed on one side of the slide rail platform 2 and can be adjusted to limit the initial position of the object 5;

[0053] The laser rangefinder 8 is installed on the base 1 and is used to measure the position information of the propulsion assembly 4 and the object 5 and calculate the movement speed.

[0054] In other embodiments, a guide rail 9 is fixed on the base 1 and corresponds to the length direction of the base, the propulsion assembly 4 is slidably connected to the guide rail 9, the slide platform 2 is fixed above the base 1, and long groove seats 10 for fixedly connecting the positioning assembly 7 are provided on both sides of the slide platform 2. The guide rail 9 is arranged close to one end of the base 1, and the slide platform 2 is arranged close to the other end of the base 1.

[0055] There is a central slide rail on the slide platform, and baffles are provided on both sides of the corresponding central slide rail. The objects to be placed are located on the inner side of the baffles but do not contact the baffles. The baffles can reduce the impact of external factors on the movement of the objects to be placed. It should be noted that there is a spacing distance between the baffles and the central slide rail. The purpose is to provide a avoidance space for the propulsion component so that the related structures of the propulsion component can abut against the objects to be placed.

[0056] In a specific implementation, the actuator of the energy storage component 3 is not limited to the tension spring 301, but can also be a high-pressure gas tank or a piston or a cylinder. The purpose of the energy storage component is to provide kinetic energy to the propulsion component and the object being launched. Therefore, the energy storage component can also be replaced by a high-pressure gas tank cold launch module with compressed air as the power source, or a cylinder / piston hot launch module with high-pressure gas generated by gunpowder combustion as the power source; and the acquisition of parameters such as force, displacement, and angle can also be achieved by a variety of sensors based on different principles.

[0057] In other specific embodiments, the tension spring 301 is parallel to the base 1 and fixed on the bottom side of the base 1, one end of the tension spring 301 is fixed on the bottom wall of the base 1, and the other end of the tension spring 301 is connected to the wire rope 302. The base 1 is provided with a pulley 11 for guiding the direction of the wire rope. The wire rope 302 passes around the pulley 11 and passes through the rope hole on the base and then is connected to the propulsion assembly 4. There is a sleeve on the outside of the tension spring to ensure the installation and stable operation of the tension spring.

[0058] In other specific embodiments, the propulsion assembly 4 includes a sliding tube seat 401, a push plate frame 402, a push plate 403 and a buffer compression spring 404. The sliding tube seat 401 is a square tube structure. The sliding tube seat 401 is slidably connected to the guide rail 9. A hanging ear 12 is fixed at one end of the sliding tube seat 401. The sliding tube seat 401 is detachably connected to the dragging assembly 6 through the hanging ear. The push plate frame 402 is fixed to the top of the other end of the sliding tube seat 401. The push plate frame 402 is slidably connected to the slide rail platform 2. The push plate 403 is fixed on the push plate frame 402 and pushes the object 5 to move. It should be noted that the central slide rail on the slide rail platform is an I-type, and there are rollers on the push plate frame, and the sliding connection between the push plate frame and the central slide rail is realized, thereby stably ensuring the forward sliding process of the push plate 403.

[0059] The buffer compression spring 404 is located inside the sliding tube seat 401 and one end is fixedly connected to the sliding tube seat 401, and the other end is connected to the travel slider 405. The travel slider 405 is slidably connected to the inner side of the sliding tube seat 401 and will not fall out. The wire rope 302 is fixedly connected to the travel slider 405, and can also pass through the travel slider 405 and be fixed inside one end of the sliding tube seat 401 close to the hanging ear 12.

[0060] In some other embodiments, a limit seat 13 is provided on the base 1 and at the other end close to the sliding tube seat 401. The limit seat is also a long strip structure, and a limit baffle is provided at its end. It should be noted that the limit seat is used to limit the terminal stroke of the sliding tube seat (i.e., the maximum displacement), and it also plays the role of end bearing of the buffer compression spring 404. The limit seat 13 can limit the continued movement of the stroke slider 405. When the sliding tube seat 401 moves at high speed, it can slide on the outside of the limit seat 13. The limit seat 13 limits the terminal sliding stroke of the sliding tube seat 401. The limit seat 13 is provided with a hole for passing the wire rope, and the end of the limit seat 13 is rotatably connected to the wire rope reversing wheel 14 to ensure smooth guiding of the wire rope.

[0061] In some other specific embodiments, the dragging assembly 6 includes a screw sliding portion 601 and a hook connection portion 602, the screw sliding portion specifically refers to a screw sliding mechanism, the screw sliding portion 601 is driven by a driving motor 6011, the sliding seat 6012 on the screw sliding portion 601 is connected to the hook connection portion 602 and drives the hook connection portion 602 to move, in order to obtain the elastic force data of the tension spring, a tension sensor 15 is arranged between the sliding seat 6012 and the hook connection portion 602.

[0062] In some other embodiments, the ear connection part 602 includes a mounting seat 6021, an electromagnet 6022 and a hook member 6023. The mounting seat 6021 is fixed on the sliding seat 6012 and a tension sensor 15 is connected between the mounting seat and the sliding seat. The mounting seat 6021 is connected to a hinged seat. The hook member 6023 is rotatably connected to the hinged seat through a pin shaft. One end of the hook member 6023 is a magnetic end, and the other end is a ear end. The electromagnet 6022 attracts the magnetic end and controls the ear end to swing and hang on the ear of the propulsion component 4. When releasing the object to be released, the electromagnet is controlled to attract the hook member to release the connection between the dragging component and the propulsion component.

[0063] In some other embodiments, the positioning assembly 7 includes a servo seat 701, a servo 702 and a positioning rod 703. The servo seat 701 is connected to one side of the slide platform 2, the servo 702 is fixedly connected to the top of the servo seat 701, the positioning rod 703 is connected to the output shaft of the servo 702, and the positioning rod 703 rotates driven by the servo output shaft. A slot 16 is provided on the outer wall of the object 5 to be launched, and the positioning rod 703 is snapped into the slot 16 and limits the initial movement state of the object 5 to be launched.

[0064] In other embodiments, the laser rangefinder 8 includes a first laser rangefinder 801 and a second laser rangefinder 802. The first laser rangefinder 801 is fixed to an edge of one end of the base 1. The object 5 is located on the detection path of the first laser rangefinder 801. The second laser rangefinder 802 is fixed to the middle of the base 1. The propulsion assembly 4 is located on the detection path of the second laser rangefinder 802 and can be used to measure the position of the propulsion assembly to provide feedback on the expansion and contraction of the tension spring.

[0065] The specific process is as follows:

[0066] Before ejection, the dragging assembly and the propulsion assembly establish a connection relationship (the hooking piece hooks the hanging ear), and the driving motor pulls the propulsion assembly through the sliding seat to drag and stretch the tension spring to a predetermined length, and then pushes the object to be released into the slide rail to the release position, and is locked by the positioning assembly; during ejection, the positioning assembly is first unlocked, and then the hooking piece releases the restriction on the hanging ear, so that the propulsion assembly and the dragging assembly are quickly separated, and the propulsion assembly ejects the object to be released along the slide rail at a predetermined speed. The push plate contacts the end (head) of the object to be released throughout the movement to push it to move. During the entire ejection process, the spring parameters are fed back in real time by the tension sensor; the position information of each moving part of the mechanism and the movement speed of the object to be released are all monitored and solved in real time by the laser rangefinder.

[0067] In the delivery test, compared with the traditional free-fall delivery method, precise control of the speed of the delivered objects out of the cabin was achieved; its track form can also be expanded to a combined honeycomb, so as to realize the study of the delivery effect of the delivered objects at different delivery positions in the carrier cabin.

[0068] As for the device and the method of use disclosed in the embodiment, since they correspond to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0069] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A low-speed wind tunnel test model ejection mechanism, characterized in that: include: A base (1), a slide rail platform (2) for sliding the object (5) to be placed is fixed above the base (1); An energy storage component (3), the energy storage component (3) being fixed on the base (1) and providing energy for sliding and propelling the object being launched; A propulsion assembly (4), wherein the propulsion assembly (4) is slidably connected to the base (1), the propulsion assembly (4) is located at the end of the object to be placed (5) and pushes the object to be placed to move on the slide rail platform (2), and the energy storage assembly (3) is connected to the propulsion assembly (4) and provides propulsion kinetic energy; A dragging assembly (6), wherein the dragging assembly (6) is mounted on an edge of one end of the base (1), and the dragging assembly (6) is connected to the propulsion assembly (4) via a hook and can drive the propulsion assembly (4) to move on the base; A positioning component (7), the positioning component (7) being installed on one side of the slide platform (2), the position of the positioning component (7) on the slide platform being adjustable and being used to limit the initial position of the placed object (5) on the slide platform; A laser rangefinder (8) is installed on the base (1) and is used to measure the position information of the propulsion component (4) and the object (5) to be thrown, and to calculate the movement speed.

2. The low-speed wind tunnel test model ejection mechanism for launching according to claim 1 is characterized in that: A guide rail (9) is fixed on the base (1) and corresponds to the length direction of the base, the propulsion assembly (4) is slidably connected to the guide rail (9), the slide rail platform (2) is fixedly located above the base (1), and long groove seats (10) for fixedly connecting the positioning assembly (7) are provided on both sides of the slide rail platform (2), the guide rail (9) is arranged close to one end of the base (1), and the slide rail platform (2) is arranged close to the other end of the base (1).

3. The low-speed wind tunnel test model ejection mechanism for launching according to claim 1 is characterized in that: The actuator of the energy storage assembly (3) comprises a tension spring (301) or a high-pressure gas storage tank or a piston or a cylinder.

4. The low-speed wind tunnel test model ejection mechanism for launching according to claim 3 is characterized in that: The tension spring (301) is parallel to the base (1) and fixed on the bottom side of the base (1); one end of the tension spring (301) is fixed on the bottom wall of the base (1); the other end of the tension spring (301) is connected to a steel wire rope (302); a pulley (11) for guiding the direction of the steel wire rope is provided on the base (1); the steel wire rope (302) passes around the pulley (11) and through the rope hole on the base to be connected to the propulsion assembly (4).

5. The low-speed wind tunnel test model ejection mechanism for launching according to claim 4, characterized in that: The propulsion assembly (4) comprises a sliding tube seat (401), a push plate frame (402), a push plate (403) and a buffer compression spring (404); the sliding tube seat (401) is a square tube structure; the sliding tube seat (401) is slidably connected to the guide rail (9); a hanging ear (12) is fixed to one end of the sliding tube seat (401); the dragging assembly (6) is connected to the hanging ear via a hook; the push plate frame (402) is fixed to the top of the other end of the sliding tube seat (401); the push plate frame (40 2) is slidably connected to the slide rail platform (2), the push plate (403) is fixed on the push plate frame (402) and pushes the object (5) to move, the buffer compression spring (404) is located inside the sliding tube seat (401) and one end is fixedly connected to the sliding tube seat (401), and the other end is connected to the travel slider (405), the travel slider (405) is slidably connected to the inner side of the sliding tube seat (401), and the wire rope (302) is connected to the travel slider (405).

6. The low-speed wind tunnel test model ejection mechanism for launching according to claim 5, characterized in that: A limit seat (13) is provided on the base (1) and at the other end close to the sliding tube seat (401). When the sliding tube seat moves at a high speed, it can be slidably sleeved on the outer side of the limit seat (13). The limit seat (13) limits the terminal sliding stroke of the sliding tube seat (401). The limit seat (13) is provided with a hole for passing a steel wire rope. The end of the limit seat (13) is rotatably connected to a steel wire rope reversing wheel (14).

7. The low-speed wind tunnel test model ejection mechanism for launching according to claim 1 is characterized in that: The dragging assembly (6) comprises a screw rod sliding part (601) and a hook connecting part (602); the screw rod sliding part (601) is driven by a driving motor (6011); a sliding seat (6012) on the screw rod sliding part (601) is connected to the hook connecting part (602) and drives the hook connecting part (602) to move.

8. The low-speed wind tunnel test model ejection mechanism for launching according to claim 7 is characterized in that: The hook connection part (602) includes a mounting seat (6021), an electromagnet (6022) and a hook member (6023); the mounting seat (6021) is fixed on the sliding seat (6012) and a tension sensor (15) is connected between the mounting seat and the sliding seat; the mounting seat (6021) is connected to a hinge seat; the hook member (6023) is a hook and is rotatably connected to the hinge seat via a pin; one end of the hook member (6023) is a magnetic end and the other end is a hook end; the electromagnet (6022) attracts the magnetic end and controls the hook end to swing and hang on the hook of the propulsion component (4).

9. The low-speed wind tunnel test model ejection mechanism for launching according to claim 1, characterized in that: The positioning assembly (7) comprises a steering gear seat (701), a steering gear (702) and a positioning rod (703); the steering gear seat (701) is connected to one side of the slide rail platform (2); the steering gear (702) is fixedly connected to the top of the steering gear seat (701); the positioning rod (703) is connected to the output shaft of the steering gear (702); the positioning rod (703) rotates under the drive of the steering gear output shaft; a slot (16) is provided on the outer side wall of the object (5); the positioning rod (703) is engaged in the slot (16) and limits the initial movement state of the object (5).

10. The low-speed wind tunnel test model ejection mechanism for launching according to claim 1, characterized in that: The laser rangefinder (8) comprises a first laser rangefinder (801) and a second laser rangefinder (802), wherein the first laser rangefinder (801) is fixed to an edge of one end of the base (1), the object (5) to be thrown is located on a detection path of the first laser rangefinder (801), the second laser rangefinder (802) is fixed to a middle part of the base (1), and the propulsion assembly (4) is located on the detection path of the second laser rangefinder (802).

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