Low-disturbance, high-response-speed release device and control method of wind tunnel test system

Abstract

The present invention relates to a low-disturbance, high-response-speed release device and a control method for a wind tunnel test system. The release device includes a base, a limiter and a cutter. A rope for hanging a test object is connected to the base. The limiter is provided with a limit hole, the rope passes through the limit hole, and the rope and the limit hole are clearance-matched. One side of the hole wall of the limit hole is open to allow the rope to enter the limit hole radially. There are two limiters, which are arranged at intervals along the length direction of the rope. The cutter is located between the two limiters. The cutter is configured to be slidably connected to the base in a controlled manner along a plane perpendicular to the length direction of the rope. The release device can prevent or reduce lateral movement and shaking of the rope, thereby reducing or avoiding interference with the initial state of the test object, thereby achieving the effect of improving the test accuracy. It can also reduce the experimental preparation time and improve the experimental efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of wind tunnel testing, and in particular to a low-disturbance, high-response-speed release device and a control method for a wind tunnel testing system. Background Art

[0002] A high-speed wind tunnel is an experimental device specifically used to simulate high-speed fluids. By conducting experiments in a high-speed wind tunnel, researchers can obtain data on the lift, drag, stability, and control characteristics of high-speed aircraft, which is crucial for designing aircraft that can operate safely and efficiently under high-speed conditions.

[0003] In related technologies, the test object is typically suspended in a wind tunnel by a free-fall method. This involves suspending the test object in a wind tunnel via a rope. A cutter is positioned on one side of the rope. At the start of the test, the cutter is controlled to cut the rope at high speed, allowing the test object to be released accurately and quickly.

[0004] However, in the above solution, the cutter will generate a lateral shear force on the rope during the rope cutting process, causing the rope to shake laterally, thereby interfering with the initial state of the test object at the lower end, and ultimately affecting the accuracy of the test. Summary of the Invention

[0005] In view of the above problems, the present invention is proposed to provide a low-disturbance, high-response speed release device and a control method for a wind tunnel test system that overcomes the above problems or at least partially solves the above problems, aiming to solve the problem that the cutter of the existing release device causes the rope to shake laterally when cutting the rope.

[0006] Specifically, the present invention provides the following technical solutions:

[0007] A low-disturbance and high-response-speed releasing device comprises a base, a limiter and a cutter.

[0008] A rope for hanging the test object is connected to the base.

[0009] The stopper is provided with a limit hole, through which the rope passes, and the rope has a clearance fit within the limit hole. One side of the hole wall of the limit hole is open to allow the rope to enter the limit hole in a radial direction. There are two stoppers, which are spaced apart along the length of the rope.

[0010] The cutter is located between the two stoppers and is configured to be slidably connected to the base in a controlled manner along a plane perpendicular to the length direction of the rope.

[0011] Optionally, the release device further comprises a driving device, wherein the driving device comprises an actuator, a linear guide and a tool holder.

[0012] The actuator is fixedly arranged on the base and configured to drive the cutter to slide in a controlled manner.

[0013] The linear guide is fixedly arranged on the base, and the cutter is connected to the linear guide in a linear sliding manner.

[0014] The cutter is fixedly connected to the tool holder, the tool holder is slidably connected to the linear guide, and the tool holder is fixedly connected to the telescopic end of the actuator.

[0015] Optionally, the test object is suspended by a plurality of ropes, each of which corresponds to a set of the stoppers and one of the cutters.

[0016] The plurality of cutters are all fixedly connected to the knife holder.

[0017] Optionally, the response time of the actuator is less than or equal to 10 ms, and the repeatability of the response time is less than or equal to 0.5 ms.

[0018] Optionally, the base is arranged horizontally and is provided with an avoidance hole allowing the rope to pass through.

[0019] The release device further comprises a lifting mechanism, which is fixedly arranged on the upper side of the base, and the rope is connected to the lifting mechanism.

[0020] The stopper and the cutter are both located on the lower side of the base.

[0021] Optionally, the limiter includes a limit seat and a limit ring. The limit seat is fixedly arranged on the base. The limit hole is formed in the limit ring, and the limit ring is hinged to the limit seat along an axis parallel to the axial direction.

[0022] The limiting ring is also provided with a limiting block to open or close the opening of the wall of the limiting hole.

[0023] Optionally, the distance between the two limiters is less than 1.2 times the thickness of the cutter.

[0024] Optionally, the cutter is connected to the base in a linear sliding manner.

[0025] The included angle between the cutting direction of the cutter and the opening direction of the corresponding limiting hole is 90-180 degrees.

[0026] Optionally, the cutting edge of the cutter is tilted, and the angle between the cutting edge and the cutting direction is 15-75 degrees.

[0027] In another aspect, the present invention also provides a control method for a wind tunnel test system. The wind tunnel test system includes a controller, a collector for acquiring the state of a test object, and the aforementioned release device. The controller is provided with a synchronizer that is signal-connected to both the release device and the collector. The control method includes:

[0028] Get the start command;

[0029] The synchronizer simultaneously sends a release signal to the release device and a collection signal to the collector according to the start instruction;

[0030] The release device cuts the rope according to the release signal;

[0031] The collector acquires the state data of the test object according to the acquisition signal;

[0032] The status data is analyzed and processed by a computer.

[0033] In the release device of the present invention, the cutter is used to cut the rope, and the limiter can limit the rope that suspends the test object. Specifically, the two limiters are located on either side of the cutter, and the rope is loosely matched with the limit hole. The limit hole can limit the rope in the lateral direction of the rope. When the cutter cuts the rope in the vertical direction, the walls of the two limit holes can block the rope, preventing or reducing lateral movement and shaking of the rope, thereby reducing or avoiding interference with the initial state of the test object and achieving the effect of improving test accuracy. On the other hand, one side of the hole wall of the limit hole is open, making it convenient for the tester to place the rope in the limit hole along the radial direction of the limit hole, which can reduce experimental preparation time and improve experimental efficiency.

[0034] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0036] Figure 1 is a schematic structural diagram of a release device according to one embodiment of the present invention;

[0037] Figure 2 is a schematic structural diagram of a release device according to one embodiment of the present invention;

[0038] Figure 3is a schematic partial structural diagram of a release device according to one embodiment of the present invention;

[0039] Figure 4 is based on Figure 3 Schematic enlarged view of point A in the middle;

[0040] Figure 5 is a schematic partial bottom view of a release device according to one embodiment of the present invention;

[0041] Figure 6 is a schematic partial cross-sectional view along a horizontal plane of a release device according to one embodiment of the present invention;

[0042] Figure 7 is a schematic partial cross-sectional view along a horizontal plane of a release device according to one embodiment of the present invention;

[0043] Figure 8 is a schematic partial cross-sectional view along a horizontal plane of a release device according to one embodiment of the present invention;

[0044] Figure 9 is a schematic partial cross-sectional view along a horizontal plane of a release device according to one embodiment of the present invention;

[0045] Figure 10 is a schematic partial cross-sectional view along a vertical plane of a release device according to one embodiment of the present invention;

[0046] Figure 11 is a schematic block diagram of a wind tunnel test system according to one embodiment of the present invention;

[0047] Figure 12 is a schematic flow chart of a control method for a wind tunnel test system according to an embodiment of the present invention.

[0048] List of reference numerals:

[0049] 100. Release device; 110. Base; 111. Avoidance hole; 120. Stopper; 121. Limiting hole; 122. Rope entry groove; 123. Limiting seat; 124. Limiting ring; 125. Limiting block; 126. Knife hole; 130. Cutter; 140. Drive device; 141. Actuator; 141a. Telescopic end; 142. Linear guide; 143. Knife holder; 150. Lifting mechanism; 200. Controller; 210. Synchronizer; 300. Collector; 400. Computer; 500. Rope; 600. Test object. DETAILED DESCRIPTION

[0050] Refer to the following Figures 1 to 12The following describes a low-disturbance, high-response speed release device and a control method for a wind tunnel test system according to an embodiment of the present invention. The directions or positional relationships indicated by terms such as "front," "rear," "up," "down," "top," "bottom," "inside," "outside," and "lateral" are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and are therefore not to be construed as limitations on the present invention.

[0051] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features, that is, include one or more of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. When a feature "includes or contains" one or more of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may further include other features.

[0052] Unless otherwise expressly specified or limited, terms such as "disposed," "installed," "connected," "connected," "fixed," and "coupled" should be understood broadly. For example, they may refer to fixed or detachable connections, or integration; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two elements or interaction between two elements, unless otherwise expressly limited. A person of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0053] In addition, in the description of this embodiment, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact via another feature between them. That is, in the description of this embodiment, the first feature being "above," "above," and "above" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below," "below," or "below" the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0054] In the description of the present embodiment, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in any one or more embodiments or examples.

[0055] Figure 1 is a schematic structural diagram of a release device according to an embodiment of the present invention, with reference to Figure 1 , and combined with Figure 2-12 An embodiment of the present invention provides a low-disturbance, high-response speed release device 100, comprising a base 110, a limiter 120 and a cutter 130. A rope 500 for hanging a test object 600 is connected to the base 110. The limiter 120 is provided with a limiting hole 121, through which the rope 500 passes, and the rope 500 is loosely fitted with the limiting hole 121. One side of the hole wall of the limiting hole 121 is open to allow the rope 500 to enter the limiting hole 121 radially. There are two limiters 120, which are arranged at intervals along the length direction of the rope 500. The cutter 130 is located between the two limiters 120. The cutter 130 is configured to be slidably connected to the base 110 in a controlled manner along a plane perpendicular to the length direction of the rope 500.

[0056] The test object 600 may be an aircraft model, a model of an object dropped from an aircraft, or the like. After the cutter 130 cuts the suspension rope 500, the test object 600 falls freely in the wind tunnel in a preset initial state (posture), encountering the high-speed airflow in the wind tunnel, thereby simulating the test object 600 running under high-speed conditions. Limited by actual physical conditions, the specifications and dimensions of high-speed wind tunnels are usually small, and the effective test time of the test object 600 therein is short. The release device 100 is usually required to have a full-range response time of milliseconds and a time repetition accuracy of milliseconds. In the related art, the cutting action of the cutter 130 will generate a lateral shear force on the rope 500, causing the rope 500 to shake laterally, thereby interfering with the initial state of the test object 600 at the lower end of the rope 500, and ultimately affecting the results of the test.

[0057] In this embodiment, base 110 can be located above or inside the wind tunnel. One end of rope 500 is connected to base 110 (e.g., wound around a pulley on base 110). Typically, the upper end of rope 500 is connected to base 110, and the lower end suspends test object 600. The weight of test object 600 creates tension on rope 500, causing it to tighten.

[0058] The stoppers 120 can be fixedly mounted on the base 110 and located near the rope 500. When the rope 500 extends vertically, the two stoppers 120 are spaced apart in the vertical direction. When the rope 500 extends horizontally, the two stoppers 120 are spaced apart in the left-right direction.

[0059] The cutter 130 can be controlled and driven by a drive device, which can be an electric device such as an actuator or an electric push rod, or a chemical device such as an explosive. The drive device is used to accurately drive the cutter 130 to move horizontally quickly to instantly cut the rope 500.

[0060] This embodiment does not limit the material of the rope 500; the rope 500 can be made of metal, nylon, polymer, or other materials, as long as it can be cut by the cutter 130. The rope 500 is inserted into the retaining hole 121, and the rope 500 and the retaining hole 121 are loosely matched. That is, the shape of the retaining hole 121 matches the cross-sectional shape of the rope 500 and is slightly larger than the rope 500. If the cross-section of the rope 500 is circular, the retaining hole 121 can be circular, with a diameter slightly larger than the rope 500. Thus, when the cutter 130 cuts the rope 500, the walls of the retaining hole 121 block the rope 500, preventing or reducing lateral movement and shaking of the rope 500. This reduces or avoids interference with the initial state of the test object 600, reduces disturbance of the test object 600, and improves test accuracy. At the same time, by blocking the rope 500 with the stopper hole 121, the cutting time of the cutter 130 can be shortened, thereby shortening the overall response time of the release device 100 and improving the response speed of the release device 100. Furthermore, because the diameter of the stopper hole 121 is slightly larger than the rope 500, after the rope 500 is severed, the wall of the stopper hole 121 does not generate excessive friction on the rope 500 below, allowing the test object 600 to begin free fall at the moment of severance. In other words, the wall of the stopper hole 121 does not affect the timing, speed, and acceleration of the test object 600's free fall, thereby reducing the disturbance caused by the stopper hole 121 on the test object 600 and improving test accuracy.

[0061] In the related art, the lower end of the rope 500 is typically equipped with a connecting and locking device, such as a hook or loop, to connect the rope 500 to the test object 600. The specifications and dimensions of this connecting and locking device are typically larger than the cross-sectional dimensions of the rope 500 itself. When inserting the rope 500 into the retaining hole 121, the connecting and locking device is typically removed first, inserted through the retaining hole 121, and then reattached to the lower end of the rope 500. This approach is complex to operate. Furthermore, due to the limited operating space and harsh working conditions at the experimental site, the connection reliability of the connecting and locking device during on-site installation may not meet experimental requirements. In this embodiment, one side of the retaining hole 121 is open to form a rope entry groove 122. This allows the rope 500 to be placed directly into the retaining hole 121 during the preparation phase by radially passing through the rope entry groove 122 from the outside of the retaining hole 121. This reduces experimental preparation time and improves experimental efficiency.

[0062] In some embodiments of the release device of the present invention, such as Figure 5 As shown, the release device 100 also includes a drive device 140, which includes an actuator 141, a linear guide 142, and a tool holder 143. The actuator 141 is fixedly mounted on the base 110 and is configured to drive the cutter 130 to slide in a controlled manner. The linear guide 142 is fixedly mounted on the base 110, and the cutter 130 is connected to the linear guide in a linear sliding manner. The cutter 130 is fixedly connected to the tool holder 143. The tool holder 143 is slidably connected to the linear guide 142, and the tool holder 143 is fixedly connected to the telescopic end 141a of the actuator 141.

[0063] The actuator 141 is a device that enables high-precision active control of vibration / motion, providing precise load management and motion control. Actuator 141 may include piezoelectric ceramic actuators, piezoelectric film actuators, electrostrictive actuators, magnetostrictive actuators, shape memory alloy actuators, servo actuators, and electrorheological fluid actuators. Specifically, the actuator 141 in this embodiment is a linear actuator. The telescopic end 141a of the actuator 141 is fixedly connected to the tool holder 143, driving the cutter 130 along a straight line within a full response time of milliseconds.

[0064] The linear guide 142 can be a linear guide rail, a linear guide groove, etc., which is used to further limit the movement direction of the tool holder 143 and the cutter 130, so that the cutter 130 cuts the rope 500 in a precise cutting direction.

[0065] In some embodiments of the release device of the present invention, such as Figure 5 As shown, the test object 600 is suspended by a plurality of ropes 500. Each rope 500 corresponds to a set of stoppers 120 and a cutter 130. The plurality of cutters 130 are fixedly connected to the knife holder 143.

[0066] In this embodiment, the test object 600 is suspended by multiple ropes 500. For example, the test object 600 can be suspended by two ropes 500, one at the front end of the test object 600 and the other at the rear end. By adjusting the length of the ropes 500, the vertical position, front-to-back tilt, and other aspects of the test object 600 can be adjusted, so that the initial posture of the test object 600 conforms to a predetermined posture. For another example, the test object 600 can be suspended by three ropes 500, thereby adjusting the vertical position, front-to-back tilt angle, and left-to-right roll angle of the test object 600.

[0067] In this embodiment, a set of two stoppers 120 is spaced apart along the length of the same rope 500. Each rope 500 corresponds to a set of stoppers 120 and a cutter 130. The multiple cutters 130 are fixedly connected to a blade holder 143; in other words, all cutters 130 are driven by a single actuator 141. This ensures that when the actuator 141 is actuated, all cutters 130 simultaneously cut the corresponding rope 500, ensuring that the test object 600 freely falls downward in the predetermined initial posture, ensuring that the test achieves the desired result.

[0068] In some embodiments of the release device of the present invention, the response time of actuator 141 is less than or equal to 10 ms, and the repeatability of the response time is less than or equal to 0.5 ms. This enables the release device 100 to be applied to release tests requiring timely excitation (millisecond-level) (e.g., in hypersonic wind tunnels). In conjunction with observation and measurement equipment, the response of the test object 600 under excitation can be studied. The device has millisecond-level repeatability, ensuring successful release tests even under short-duration excitations in the millisecond range.

[0069] In some embodiments of the release device of the present invention, such as Figure 1-2 As shown, the base 110 is horizontally disposed and has an escape hole 111 for allowing the rope 500 to pass through. The release device 100 also includes a lifting mechanism 150, which is fixedly disposed on the upper side of the base 110 and to which the rope 500 is connected. The limiter 120 and the cutter 130 are both located on the lower side of the base 110.

[0070] In this embodiment, the lifting mechanism 150 can be a rope pulley, a winch, or the like, and is used to tighten or retract the rope 500. By placing the lifting mechanism 150 on the upper side of the base 110 and the stopper 120 and the cutter 130 on the lower side of the base 110, space can be effectively utilized, the volume of the release device 100 can be reduced, and its application in smaller wind tunnel equipment can be facilitated.

[0071] In some embodiments of the release device of the present invention, the lifting mechanism 150 , the stopper 120 , and the cutter 130 are all adjustably mounted on the base 110 to adjust the position of the rope 500 , thereby adjusting the position and angle of the test object 600 .

[0072] In some embodiments of the release device of the present invention, such as Figure 8-9 As shown, the limiter 120 includes a limit seat 123 and a limit ring 124. The limit seat 123 is fixedly arranged on the base 110. The limit ring 124 has a limit hole 121 formed therein and is hinged to the limit seat 123 along an axis parallel to the axial direction.

[0073] In this embodiment, the retaining seat 123 can be fixedly connected to the base 110 by welding, clamping, fastener connection, or other means, thereby providing a firm support for the retaining ring 124 and preventing it from moving or shaking. The retaining ring 124 is hingedly connected to the retaining seat 123, allowing the angle or direction of the rope entry groove 122 to be freely changed. During the test preparation stage, the retaining ring 124 can be first rotated so that the rope entry groove 122 faces the rope 500, facilitating the introduction of the rope 500 through the rope entry groove 122 into the retaining hole 121. The retaining ring 124 can then be rotated again so that the rope entry groove 122 faces the cutter 130, preventing the rope 500 from disengaging from the retaining hole 121 when the cutter 130 cuts the rope 500.

[0074] In some embodiments of the release device of the present invention, such as Figure 7 As shown, a limiting block 125 is further provided on the limiting ring 124 to open or close the opening of the hole wall of the limiting hole 121 . Figure 7 In FIG. 1 , the dotted line portion illustrates the state when the limit block 125 opens the rope entry groove 122 .

[0075] The stopper 125 can be hinged to the stopper ring 124 or can be mounted on the stopper ring 124. Thus, during the test preparation phase, the stopper 125 can be opened to expose the rope entry groove 122, facilitating the insertion of the rope 500 into the stopper hole 121 through the rope entry groove 122. The stopper 125 can then be closed to prevent the rope 500 from escaping the stopper hole 121 in the direction of the rope entry groove 122 when the cutter 130 is cutting the rope 500.

[0076] In some embodiments of the release device of the present invention, such as Figure 10As shown, the spacing L3 between the two stoppers 120 is less than 1.2 times the thickness L2 of the cutter 130. This reduces shear deformation of the rope 500 during the cutting process by the cutter 130, thereby shortening the cutting time of the cutter 130, that is, shortening the overall response time of the release device 100, and improving the response speed of the release device 100. In some preferred embodiments of the present invention, the spacing L3 between the two stoppers 120 is less than 1.1 times the thickness L2 of the cutter 130, to further reduce shear deformation of the rope 500 during the cutting process by the cutter 130, thereby shortening the cutting time of the cutter 130, that is, shortening the overall response time of the release device 100, and further improving the response speed of the release device 100.

[0077] In some embodiments of the release device of the present invention, such as Figure 6 As shown, the cutter 130 is connected to the base 110 along a straight line and slidingly. The angle α between the cutting direction of the cutter 130 and the opening direction of the corresponding limiting hole 121 is 90-180 degrees. Figure 6 In the embodiment, the cutting direction is rightward. The opening direction of the limiting hole 121 is the same as the opening direction of the rope entry groove 122. When the cutter 130 cuts the rope 500, the rope 500 will move slightly to the right. By setting α to 90-180 degrees, the rope 500 can be prevented from dislodging from the rope entry groove 122 when the cutter 130 cuts to the right, thereby affecting the response speed of the release device 100. In some preferred embodiments of the present invention, the angle α between the cutting direction of the cutter 130 and the opening direction of the corresponding limiting hole 121 is 120-150 degrees. This reliably prevents the rope 500 from dislodging from the rope entry groove 122 when the cutter 130 cuts to the right. It also prevents the rope 500 from moving to the left and dislodging from the rope entry groove 122 before the cutter 130 cuts.

[0078] In some embodiments of the release device of the present invention, such as Figure 6 As shown, the blade of the cutter 130 is tilted, and the angle β with the cutting direction is 15-75 degrees.

[0079] In this embodiment, the blade edge can be straight or curved. When the blade edge is curved, the angle β between the blade edge and the cutting direction is the angle between the tangent line at the point of contact between the blade edge and the rope 500 and the cutting direction. By tilting the blade edge, the contact surface between the rope 500 and the blade edge can be increased, thereby improving the cutting effect.

[0080] In some embodiments of the release device of the present invention, such as Figure 6As shown, the angle α between the cutting direction of the cutter 130 and the opening direction of the corresponding limiting hole 121 is 90-180 degrees, the angle β between the blade edge and the cutting direction is 15-75 degrees, and the angle between the opening direction of the limiting hole 121 and the blade edge is 70-110 degrees. In this way, when the cutter 130 cuts the rope 500, the blade edge is approximately perpendicular to the direction of the rope entry groove 122, causing the rope 500 to move or shake in a direction approximately opposite to the rope entry groove 122, thereby minimizing the risk of the rope 500 escaping from the rope entry groove 122.

[0081] In some embodiments of the release device of the present invention, such as Figure 10 As shown, the maximum distance L1 between the rope 500 and the wall of the limiting hole 121 is less than or equal to 1 mm. The rope 500 and the limiting hole 121 have a clearance fit, and the maximum distance L1 is less than or equal to 1 mm. This limits the maximum lateral movement and shaking of the rope 500 to 1 mm, reducing or avoiding interference with the initial state of the test object 600, reducing disturbances to the test object 600, and improving test accuracy.

[0082] In some embodiments of the release device of the present invention, such as Figure 4 and Figure 10 As shown, the stopper 123 is provided with a cutter hole 126 that allows the cutter 130 to pass through. The provision of the cutter hole 126 prevents the cutter 130 from cutting into the stopper 123 and damaging the blade. Furthermore, since the cutter 130 cuts at a relatively high speed, the provision of the cutter hole 126 prolongs the deceleration time of the cutter 130, allowing the cutter 130 and the tool holder 143 to decelerate and stop at a relatively low acceleration, thereby reducing the impact on the actuator 141 and increasing the lifespan of the actuator 141.

[0083] In some embodiments of the control method of the wind tunnel test system of the present invention, as Figure 11-12 As shown, the wind tunnel test system includes a controller 200, a collector 300 for obtaining the state of a test object 600, and a release device 100 according to any one of the above embodiments or a combination of embodiments. The controller 200 is provided with a synchronizer 210, which is signal-connected to both the release device 100 and the collector 300. The control method includes:

[0084] S111, obtaining a start instruction;

[0085] S112, the synchronizer 210 sends a release signal to the release device 100 and a collection signal to the collector 300 at the same time according to the start instruction;

[0086] S113, the release device 100 cuts the rope 500 according to the release signal;

[0087] S114, the collector 300 obtains the status data of the test object 600 according to the collected signal;

[0088] S115 , analyzing and processing the status data by the computer 400 .

[0089] In this embodiment, the wind tunnel test system can pre-set a start time and issue a start command based on the start time. Alternatively, a triggering program can be pre-set and used to trigger the start command. For example, a sensor can be placed at a preset location in the wind tunnel. When the sensor detects a preset high-speed airflow, the start command is automatically triggered.

[0090] The collector 300 may include a high-speed camera, high-frequency sensors, and the like, capable of photographing, recording, and measuring the release device 100, rope 500, and test object. High-frequency sensors may include distance measuring devices, speed measuring devices, acceleration measuring devices, pressure measuring devices, and temperature measuring devices. High-frequency sensors may be mounted on the test object 600 or within the wind tunnel, though this is not required. In this embodiment, the synchronizer 210 is used to establish time synchronization. Specifically, the synchronizer 210 connects the trigger interface of the collector 300 to the trigger interface of the release device 100. After the synchronizer 210 sends a signal, the release device 100 and the collector 300 operate simultaneously, ensuring precise temporal synchronization between the release and collection actions. The synchronizer 210 can be connected to the collector 300 and release device 100 via electrical or wireless connections.

[0091] At this point, those skilled in the art will recognize that, although a number of exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications consistent with the principles of the present invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. A low-disturbance, high-response-speed release device, characterized in that: include: a base to which a rope for suspending the test object is connected; A limiter is provided with a limit hole, the rope passes through the limit hole, and the rope is loosely fitted in the limit hole; one side of the hole wall of the limit hole is open to allow the rope to enter the limit hole in a radial direction; there are two limiters, which are spaced apart along the length direction of the rope; a cutter, the cutter being located between the two stoppers; the cutter being configured to be slidably connected to the base in a controlled manner along a plane perpendicular to the length direction of the rope; a lifting mechanism, the rope being connected to the lifting mechanism; The lifting mechanism, the stopper and the cutter can all be adjustably mounted on the base to adjust the position of the rope.

2. The release device according to claim 1, characterized in that The release device further includes a driving device, which includes: an actuator, fixedly disposed on the base and configured to drive the cutter to slide in a controlled manner; A linear guide is fixedly arranged on the base, and the cutter is connected to the linear guide by sliding along a straight line; The cutter is fixedly connected to the tool holder; the tool holder is slidably connected to the linear guide, and the tool holder is fixedly connected to the telescopic end of the actuator.

3. The release device according to claim 2, characterized in that The test object is suspended by a plurality of ropes; each rope corresponds to a set of the limiters and one of the cutters; The plurality of cutters are all fixedly connected to the knife holder.

4. The release device according to claim 2, characterized in that The response time of the actuator is less than or equal to 10 ms, and the repetition accuracy of the response time is less than or equal to 0.5 ms.

5. The release device according to claim 1, characterized in that: The base is arranged horizontally and is provided with an avoidance hole allowing the rope to pass through; The stopper and the cutter are both located on the lower side of the base.

6. The release device according to claim 1, characterized in that The limiter includes a limit seat and a limit ring; the limit seat is fixedly arranged on the base; the limit hole is formed in the limit ring, and the limit ring is hinged to the limit seat along an axis parallel to the axial direction; The limiting ring is also provided with a limiting block to open or close the opening of the wall of the limiting hole.

7. The release device according to claim 1, characterized in that The distance between the two stoppers is less than 1.2 times the thickness of the cutter.

8. The release device according to claim 1, characterized in that The cutter is connected to the base in a straight line and sliding manner; The included angle between the cutting direction of the cutter and the opening direction of the corresponding limiting hole is 90-180 degrees.

9. The release device according to claim 8, characterized in that The cutting edge of the cutter is tilted, and the angle between the cutting edge and the cutting direction is 15-75 degrees.

10. A control method for a wind tunnel test system, characterized in that: The wind tunnel test system includes a controller, a collector for obtaining the state of the test object, and a release device according to any one of claims 1 to 9, wherein the controller is provided with a synchronizer, and the synchronizer is signal-connected to both the release device and the collector; the control method includes: Get the start command; The synchronizer simultaneously sends a release signal to the release device and a collection signal to the collector according to the start instruction; The release device cuts the rope according to the release signal; The collector acquires the state data of the test object according to the acquisition signal; The status data is analyzed and processed by a computer.

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