A passive self-deploying off-orbit sail mechanism with delay trigger and its control method

Abstract

A passive self-deploying off-orbit sail mechanism with delayed triggering and its control method, comprising: an off-orbit sail container, which is connected to an off-orbit operation target; a locking device, which is arranged on the outer surface of plane one of the off-orbit sail container; a timed unlocking device, which is arranged on the outer surface of plane one of the off-orbit sail container; a deploying device, which includes a deploying mechanism, a first spring, a delayed triggering device, an elastic tape measure, and a travel column. The passive self-deploying off-orbit sail mechanism with delayed triggering and its control method of the present invention can achieve passive timed unlocking, slow down the deployment speed of the sail membrane, and control the position and attitude of the deploying mechanism and the sail membrane after unlocking, making up for the technical deficiencies in the existing auxiliary sail off-orbit technology such as single-power unlocking, large impact during sail membrane deployment, and uncontrollable deployment process, which is beneficial to improving the success rate of the off-orbit of space operation devices.

Description

Technical Field

[0001] The present invention belongs to the technical field of the deorbiting technology of space operation devices, and particularly relates to a self-deploying deorbiting sail mechanism with delay trigger and its control method. Background Art

[0002] In order to slow down the growth of space debris and prevent abandoned space devices from becoming space garbage, auxiliary deorbiting devices have become a standard configuration for current spacecrafts, and deorbiting sails are one of the most widely used devices among them.

[0003] The deorbiting sail is configured on the surface of the space operation device in a compressed state. After the mission is completed, the device is unlocked and the sail membrane is deployed. By increasing the contact area with the atmosphere in the low-earth orbit environment, the space operation device gradually deviates from its original orbit, thus achieving the deorbiting operation. The deorbiting sail has the characteristics of light weight, low cost, simple structure, no need for fuel, reliability, etc., and is suitable for low-earth orbit satellites and space operation devices.

[0004] Currently, the deployment method of the deorbiting sail mainly adopts single electrical signal unlocking. After unlocking, the deployment process of the sail membrane is uncontrollable, and the uncertain movement of the deployment mechanism will have a greater impact on the space operation device, and even affect the success rate of the deorbiting operation.

[0005] Therefore, the present invention develops a self-deploying deorbiting sail mechanism with delay trigger and its control method, which can reduce the impact on the space operation device during the deployment process, and solve the problems such as unlocking of the deorbiting sail without power supply and excessive impact during the deployment of the sail membrane. Summary of the Invention

[0006] Object of the Invention: To overcome the above deficiencies, the object of the present invention is to provide a self-deploying deorbiting sail mechanism with delay trigger and its control method, which is reasonably designed. The deployment of the sail membrane adopts passive unlocking design, uses mechanical structure to achieve the effect of timed unlocking, and uses mechanical mechanism to restrict the deployment position of the sail membrane and slow down the deployment speed of the sail membrane, so as to reduce the impact on the space operation device during the deployment process of the sail membrane, and solve the problems such as unlocking of the deorbiting sail without power supply and excessive impact during the deployment of the sail membrane.

[0007] The object of the present invention is achieved through the following technical solutions:

[0008] A self-deploying deorbiting sail mechanism with delay trigger, comprising:

[0009] A deorbiting sail container, which is connected to the deorbiting operation target;

[0010] A locking device, which is arranged on the outer surface of the first plane of the deorbiting sail container;

[0011] A timed unlocking device, which is arranged on the outer surface of the first plane of the deorbiting sail container;

[0012] Deployment device, the deployment device includes a deployment mechanism, a first spring, a delay trigger device, an elastic tape measure, and a travel column;

[0013] In the state where the off-orbit sail is closed, the deployment device is in a locked state. The deployment mechanism and the first spring are compressed inside the off-orbit sail container. The first spring is arranged between the inner surface of the first plane of the off-orbit sail container and the outer surface of the second platform of the deployment mechanism, and the upper and lower ends of the first spring are respectively connected to the inner surface of the first plane and the outer surface of the second platform; the delay trigger device is arranged inside the off-orbit sail container, the delay trigger device is connected to the deployment mechanism and the delay trigger device can rotate around the central axis of the deployment mechanism; the elastic tape measure is arranged inside the off-orbit sail container, the elastic tape measure is connected to the inner wall of the deployment mechanism, and the elastic tape measure is connected to the sail membrane; the travel column is vertically arranged at the center of the outer surface of the second platform, and the lower end of the travel column is connected to the outer surface of the second platform and the upper end extends outside the off-orbit sail container.

[0014] The off-orbit sail mechanism with delay trigger of the present invention is designed for the off-orbit requirement of a low-orbit space operation device. Based on the mechanical transmission method, an off-orbit sail mechanism composed of an off-orbit sail container, a locking device, a timing unlocking device, and a deployment device is designed. The off-orbit sail mechanism is fixed on the surface of a satellite or a space operation device, and can realize passive timing unlocking, slow down the unfolding speed of the sail membrane, and control the position and attitude of the deployment device and the sail membrane after unlocking.

[0015] The off-orbit sail container is mainly used to provide the fixation of the locking device and the timing unlocking device, as well as the storage and connection of each component of the deployment device. The internal space of the off-orbit sail container restricts the movement direction of the deployment device and realizes the controllability of the release direction of the off-orbit sail.

[0016] Preferably, the shape of the off-orbit sail container is a cylinder. The locking device and the timing unlocking device are both arranged on the outer surface of the first circular plane of the off-orbit sail container, and the upper end of the first spring is connected to the inner surface of the first circular plane.

[0017] In the state where the off-orbit sail is closed, the travel column is clamped by the locking device to lock the fixing surface of the deployment mechanism, so that the deployment mechanism is in a locked state. The deployment mechanism is compressed inside the off-orbit sail container. The elastic tape measure and the sail membrane are curled around the central column of the deployment mechanism inside the off-orbit sail container, and the first spring is in a compressed state.

[0018] The locking device can be unlocked by a timing unlocking device. The locking device releases the travel column, unlocks the deployment mechanism, and spring 1 releases elastic force to vertically eject the deployment mechanism. The deployment mechanism has a displacement amount equal to the height of the travel column. The travel column can restrict the maximum displacement of the deployment mechanism so that it does not exceed the inner wall height of the off-orbit sail container, thereby restricting the deployment position and attitude of the sail membrane, reducing the risk of contacting other objects, and ensuring the safety of the off-orbit sail deployment.

[0019] Among them, the locking device, the timing unlocking device, and spring 1 together constitute the trigger action source. The timing unlocking device is a passive trigger mechanism that controls the trigger time through a mechanical mechanism. It can be normally unlocked without power, does not rely on a single electrical signal, and ensures the reliability of unlocking.

[0020] Furthermore, in the above-mentioned self-deploying off-orbit sail mechanism with delayed triggering, spring 1 is a conical spring.

[0021] When the deployment device is unlocked, the deployment mechanism releases elastic force and ejects outward through the compressed conical spring.

[0022] Furthermore, in the above-mentioned self-deploying off-orbit sail mechanism with delayed triggering, the delayed triggering device is connected to the strut of the deployment mechanism. The inclined surface on one side of the delayed triggering device contacts the elastic tape measure and the sail membrane. The root of the delayed triggering device is connected to a rotating bearing and fixed to the deployment mechanism.

[0023] When the deployment mechanism is unlocked, the delayed triggering device can rotate around the central axis of the deployment mechanism following the elastic tape measure and the sail membrane. The friction between the delayed triggering device and the inner wall of the deployment mechanism can slow down the deployment speed of the sail membrane, and its root is connected to a rotating bearing. The rotation speed can be set through a damping rotating shaft to limit the impact generated during the deployment process of the sail membrane and control the final deployment attitude of the sail membrane, ultimately achieving effective control of the entire process from unlocking to the elastic tape measure driving the sail membrane to deploy.

[0024] Furthermore, in the above-mentioned self-deploying off-orbit sail mechanism with delayed triggering, the inner wall of the deployment mechanism is connected to 4 elastic tape measures.

[0025] Furthermore, in the above-mentioned self-deploying off-orbit sail mechanism with delayed triggering, a locking block is provided at the center of the outer surface of platform 2 of the deployment mechanism. The lower end of the travel column is connected to the locking block, and spring 1 is sleeved outside the travel column. The travel column includes a travel column body, a fixed disk provided at the upper end of the travel column body, a lower limit block provided at the lower end of the travel column body, and a hexagonal fixed column.

[0026] After the off-orbit sail is deployed, the spring releases its elastic force. The deployment mechanism has a displacement amount equal to the height of the stroke column. The fixed disk at the upper end of the stroke column contacts the boss of the off-orbit sail container platform 1 and the housing of the timed unlocking device, and is fixed on the off-orbit sail container platform 1, thereby fixing the position of the deployment mechanism.

[0027] Furthermore, for the above-mentioned self-deploying off-orbit sail mechanism with delayed triggering, the locking device includes:

[0028] Locking rods. There are 2 locking rods, and both of the 2 locking rods are arranged on the outer surface of the off-orbit sail container plane 1 and are located on the left and right sides of the stroke column;

[0029] Spring two. The 2 locking rods are connected by spring two.

[0030] In the locked state, the timed unlocking device fixes the position of the locking rods. The 2 locking rods are connected by spring two, and spring two continuously provides an outward thrust. The hexagonal fixed column of the stroke column is clamped by the 2 locking rods, so that the deployment mechanism is in the locked state.

[0031] Furthermore, for the above-mentioned self-deploying off-orbit sail mechanism with delayed triggering, the locking device further includes:

[0032] Fixed screws. There are also fixed screws on the outer surface of the off-orbit sail container plane 1 to limit the displacement of the locking rods.

[0033] Furthermore, for the above-mentioned self-deploying off-orbit sail mechanism with delayed triggering, the timed unlocking device includes:

[0034] Timed unlocking mechanism. The timed unlocking mechanism is arranged on the outer surface of the off-orbit sail container plane 1 and is located between the 2 locking rods; Spring two and the timed unlocking mechanism are respectively located on the upper and lower sides of the stroke column;

[0035] Fiber line. The fiber line passes through the inside of the timed unlocking mechanism. In the locked state, the fiber line fixes the position of the locking rods through the pulling force.

[0036] The inside of the timed unlocking mechanism is provided with a reduction gear set, a spring, a cutting device, etc. The working principle of the timed unlocking device is as follows: The fiber line passes through the through holes of the two locking rods and the timed unlocking device. The fiber line winds around the two locking rods and is fixed on the outer surface of the off-orbit sail container platform through screws. In the locked state, the fiber line fixes the position of the locking rods through the pulling force.

[0037] The unlocking time can be preset through the timing unlocking mechanism. When the preset unlocking time is reached, the spring of the timing unlocking mechanism rotates, driving the reduction gear set to rotate. The last gear of the reduction gear set is connected to the cutting device. After the gear rotates a certain distance, the cutting device directly cuts off the fiber line, thereby realizing the unlocking operation. When the fiber line is broken, the two locking rods are elastically ejected outward and fixed at the fixing screws on the outer surface of the plane.

[0038] Furthermore, in the above-mentioned passive self-deployment deorbiting sail mechanism with delayed triggering, the fiber line is Dyneema fiber line.

[0039] The fiber line uses Dyneema fiber line, which has the characteristics of 15 times higher strength than steel, low elongation at break, anti-friction, waterproof and UV protection, and material flexibility.

[0040] The present invention also relates to a control method for the passive self-deployable deorbit sail mechanism with delayed trigger, comprising the following contents: presetting an unlocking time t in the timing unlocking device through task requirement calculation; in the closed state of the deorbit sail, the timing unlocking device fixes the position of the locking device, clamps the stroke column through the locking device, locks the deployment mechanism, and the deployment mechanism and spring 1 are compressed into the inside of the deorbit sail container; when the unlocking time t is reached, the timing unlocking device releases the locking device, the locking device releases the stroke column, unlocks the deployment mechanism, the spring 1 releases the elastic force to vertically eject the deployment mechanism, the elastic tape breaks away from the inner wall of the deorbit sail container, starts to rotate and eject, the delay trigger device follows the movement of the elastic tape and increases the friction force, slows down the rotation speed of the elastic tape, and thus reduces the impact of the sail membrane deployment process; wherein the displacement of the deployment mechanism is the designed length of the stroke column, thereby constraining the deployment position and posture of the sail membrane, reducing the risk of contact with other objects, and ensuring the safety of the deorbit sail deployment.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] (1) The passive self-deployment deorbiting sail mechanism with delayed triggering disclosed in the present invention has a reasonable design, the advantages of low space occupation, light structure quality and low processing cost, and is suitable for the deorbiting operation of various space operation devices;

[0043] (2) The passive self-deployment deorbiting sail mechanism with delayed triggering disclosed in the present invention adopts passive unlocking, which can be unlocked normally without power supply, does not rely on a single electrical signal and ensures the reliability of unlocking;

[0044] (3) The self-deploying off-orbit sail mechanism with delayed triggering disclosed by the present invention can restrict the height of the sail membrane deployment, reduce the uncertainty during the deployment process, and further improve the control of the deployment position of the sail membrane during the off-orbit sail deployment;

[0045] (4) The self-deploying off-orbit sail mechanism with delayed triggering disclosed by the present invention restricts the deployment speed of the sail membrane, slows down the deployment speed of the sail membrane, reduces the impact during the deployment process, and further improves the control of the deployment attitude of the sail membrane during the off-orbit sail deployment;

[0046] (5) The control method of the self-deploying off-orbit sail mechanism with delayed triggering disclosed by the present invention designs a corresponding control method for the above-mentioned self-deploying off-orbit sail mechanism structure, solves the technical problems such as single power supply unlocking, large impact during sail membrane deployment, and uncontrollable deployment process in the existing auxiliary sail off-orbit technology, ensures its normal operation under space conditions, has a simple unlocking method, reliable unlocking, the device main body is concentrated in the off-orbit sail container, and has excellent anti-vibration and impact resistance, ensuring the working reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a schematic diagram of the overall structure of the self-deploying off-orbit sail mechanism with delayed triggering of the present invention in the locked state;

[0048] Figure 2 It is a schematic diagram of the deployment device structure of the self-deploying off-orbit sail mechanism with delayed triggering of the present invention;

[0049] Figure 3 It is a schematic diagram of the overall structure of the self-deploying off-orbit sail mechanism with delayed triggering of the present invention in the deployed state;

[0050] Figure 4 It is a top view of the unlocking device of the self-deploying off-orbit sail mechanism with delayed triggering of the present invention in the deployed state;

[0051] Figure 5 It is a main body structure diagram of the self-deploying off-orbit sail mechanism with delayed triggering of the present invention in the deployed state;

[0052] Figure 6 It is a diagram of the timing unlocking device of the self-deploying off-orbit sail mechanism with delayed triggering of the present invention in the locked state;

[0053] Figure 7 It is a structural diagram of the delayed triggering device of the self-deploying off-orbit sail mechanism with delayed triggering of the present invention;

[0054] In the figure: off-orbit sail container 1, plane 11, locking device 2, locking rod 21, second spring 22, fixing screw 23, timed unlocking device 3, timed unlocking mechanism 31, fiber line 32, deployment device 4, deployment mechanism 41, platform 411, locking block 412, first spring 42, delay trigger device 43, elastic tape measure 44, travel column 45, travel column body 451, fixed disk 452, lower limit block 453, hexagonal fixing column 454. Detailed implementation mode

[0055] Next, Example 1 and Example 2 will be combined with the attached Figure 1-7 , and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0056] Example 1 provides a self-unfolding off-orbit sail mechanism with delay trigger.

[0057] Example 1

[0058] In view of the off-orbit requirements of low-orbit space operation devices, based on mechanical transmission methods, the present invention proposes a self-unfolding off-orbit sail mechanism with delay trigger, which can achieve passive timed unlocking, slow down the unfolding speed of the sail membrane, and control the position and attitude of the unfolding mechanism and the sail membrane after unlocking.

[0059] As Figure 1 shown, the self-unfolding off-orbit sail mechanism with delay trigger described in the present invention includes an off-orbit sail container 1, a locking device 2, a timed unlocking device 3, and a deployment device 4.

[0060] Among them, the off-orbit sail container 1 is connected to the off-orbit operation target. The locking device 2 and the timed unlocking device 3 are both arranged on the outer surface of the circular plane 11 of the off-orbit sail container 1. The off-orbit sail container 1 is mainly used to provide the fixation of the locking device 2 and the timed unlocking device 3, as well as the storage and connection of the components of the deployment device 4. The internal space of the off-orbit sail container 1 restricts the movement direction of the deployment device 4, realizing the controllability of the off-orbit sail release direction.

[0061] As Figure 1 , 4 , 5, and 6 shown, the locking device 2 includes two locking rods 21. The two locking rods 21 are both arranged on the outer surface of the plane 11 of the off-orbit sail container 1 and are located on the left and right sides of the travel column 45. The two locking rods 21 are connected by a second spring 22. A fixing screw 23 for restricting the displacement of the locking rod 21 is also arranged on the outer surface of the plane 11 of the off-orbit sail container 1.

[0062] As shown Figure 1 , 4 , 5, and 6, the timed unlocking device 3 includes a timed unlocking mechanism 31 and a fiber line 32. Inside the timed unlocking mechanism 31, there are a reduction gear set, a spring, a cutting device, etc. The timed unlocking mechanism 31 is arranged on the outer surface of the plane 11 of the off-rail sail container 1 and is located between two locking rods 21. The second spring 22 and the timed unlocking mechanism 31 are respectively located on the upper and lower sides of the travel column 45. The fiber line 32 passes through the through holes of the two locking rods 21 and the timed unlocking mechanism 31. The fiber line 32 winds around the two locking rods 21 and is fixed on the outer surface of the platform 11 of the off-rail sail container 1 by screws. In the locked state, the fiber line 32 fixes the position of the locking rod 21 through tension.

[0063] Furthermore, the fiber line 32 is made of Dyneema fiber line, which has characteristics such as a strength 15 times higher than that of steel, a low fracture elongation rate, anti-friction, waterproof and anti-ultraviolet, and flexible material.

[0064] It can be seen from the above that the present invention designs a passive unlocking device. The unlocking time can be preset through the timed unlocking mechanism 31. When the preset unlocking time is reached, the spring of the timed unlocking mechanism 31 rotates, driving the reduction gear set to rotate. The last-stage gear of the reduction gear set is connected to the cutting device. After the gear rotates a certain stroke, the cutting device directly cuts off the fiber line 32. When the fiber line 32 breaks, the two locking rods 21 bounce outwards under the elastic force and are fixed at the fixing screws 23 on the outer surface of the platform 11 of the off-rail sail container 1, thereby realizing the unlocking operation.

[0065] As shown Figure 1 , 2 , 7, the deployment device 4 includes a deployment mechanism 41, a first spring 42, a delay trigger device 43, an elastic tape measure 44, and a travel column 45. The deployment mechanism 41 is arranged inside the off-rail sail container 1. The upper and lower ends of the first spring 42 are respectively connected to the inner surface of the plane 11 of the off-rail sail container 1 and the outer surface of the platform 411 of the deployment mechanism 41. The sail film is connected to the elastic tape measure 44. The inner wall of the deployment mechanism 41 is connected to the elastic tape measure 44 and the delay trigger device 43. The delay trigger device 43 can rotate around the central axis of the deployment mechanism 41. The travel column 45 is vertically arranged at the center of the outer surface of the platform 411 and is connected to the outer surface of the platform 411 at the lower end and extends out of the off-rail sail container 1 at the upper end.

[0066] In the state where the off-orbit sail is closed, devices such as the reduction gear set, the winding spring, and the clockwork operate within the timing unlocking mechanism 31. The fiber line 32 winds around two locking rods 21, and the travel column 45 is clamped by the locking rods 21 to lock the fixed surface of the deployment mechanism 41, so that the deployment mechanism 41 is in a locked state. The deployment mechanism 41 is compressed within the off-orbit sail container 1. The elastic tape measure 44 and the sail membrane are curled around the central column of the deployment mechanism 41 within the off-orbit sail container 1, and the first spring 42 is in a compressed state.

[0067] When the deployment device 4 is unlocked (i.e., when the preset unlocking time of the timing unlocking mechanism 31 is reached), the fiber line 32 is cut off. The locking rods 21 are pushed open by the outward pressure of the second spring, and the elastic force released by the compressed first spring 42 vertically pops out the deployment mechanism 41. Due to the function of the travel column 45, the popping height of the deployment mechanism 41 is limited to prevent the deployment mechanism 41 from popping out too high and contacting other objects. During the process of the elastic tape measure 44 driving the sail membrane to unfold, the designed delay trigger device 43 slows down the unfolding speed of the sail membrane through the friction with the wall surface of the deployment mechanism 41, prevents the impact of the elastic tape measure 44 on other objects, and restricts the unfolding attitude of the sail membrane, ultimately realizing the control of the entire process of the off-orbit sail from unlocking to unfolding.

[0068] Further, the first spring 42 is a conical spring.

[0069] Further, the delay trigger device 43 is connected to the strut of the deployment mechanism 41. One side of the inclined surface of the delay trigger device 43 contacts the elastic tape measure 44 and the sail membrane. The root of the delay trigger device 43 is connected to a rotating bearing and fixed to the deployment mechanism 41. The rotation speed can be set through the damping rotating shaft to limit the impact generated during the unfolding process of the sail membrane and control the final unfolding attitude of the sail membrane.

[0070] Further, the inner wall of the deployment mechanism 41 is connected to 4 of the elastic tape measures 44.

[0071] Further, a locking block 412 is provided at the center of the outer surface of the second platform 411 of the deployment mechanism 41. The lower end of the travel column 45 is connected to the locking block 412, and the first spring 42 is sleeved outside the travel column 45. The travel column 45 includes a travel column body 451, a fixed disk 452 provided at the upper end of the travel column body 451, a lower limit block 453 provided at the lower end of the travel column body 451, and a hexagonal fixed column 454. After the off-orbit sail is unfolded, the first spring 42 releases elastic force, and the deployment mechanism 41 has a displacement amount equal to the height of the travel column 45. The fixed disk 452 at the upper end of the travel column 45 contacts the convex platform of the first platform 11 of the off-orbit sail container 1 and the outer shell of the timing unlocking mechanism 31 and is fixed on the first platform 11 of the off-orbit sail container 1, thereby fixing the position of the deployment mechanism 41.

[0072] Embodiment 2 provides a control method for a passive self - deploying off - orbit sail mechanism with delayed triggering.

[0073] Embodiment 2

[0074] As Figure 1 、 2 shown in Figures 3, 4, 5, 6, 7, the control method for the passive self - deploying off - orbit sail mechanism with delayed triggering of the present invention is designed for the space satellite active release system structure in Embodiment 1 above, and specifically includes the following content:

[0075] 1. In the closed state of the off - orbit sail, devices such as the reduction gear set, the spiral spring, and the mainspring operate within the timed unlocking mechanism 31. The fiber line 32 winds around the two locking rods 21 and is fixed to the platform 11 of the off - orbit sail container 1 through screws, fixing the locking rods 21 by tension. A second spring 22 is connected between the two locking rods 21, continuously providing an outward pulling force. The two locking rods 21 clamp the travel column 45 to lock the fixing surface of the deployment mechanism 41. The deployment device 4 is in a locked state, the deployment mechanism 41 is compressed within the off - orbit sail container 1, the elastic tape measure 44 and the sail membrane are curled around the central column of the deployment mechanism 41 within the off - orbit sail container 1, and the first spring 42 is in a compressed state.

[0076] 2. Through mission requirement calculation, a pre - set unlocking time t is set in the timed unlocking mechanism 31. In the closed state of the off - orbit sail, the first spring 42 is compressed into the off - orbit sail container 1, and the locking rods 21 fix the deployment mechanism 41 and are installed on the target surface of the off - orbit operation through screws. When the unlocking time t is reached, the timed unlocking mechanism 31 cuts off the fiber line 32, and the locking rods 21 are pushed open by the outward pressure of the second spring 22. The first spring 42 releases its elastic force to vertically eject the deployment mechanism 41. The elastic tape measure 44 disengages from the inner wall of the off - orbit sail container 1 and starts to rotate and pop out. The delayed triggering device 43 moves with the elastic tape measure 44 and increases the friction force, slowing down the rotation speed of the elastic tape measure 44, thereby reducing the impact during the sail membrane deployment process. The displacement of the deployment mechanism 41 is the designed length of the travel column 45, thereby restricting the position and attitude of the sail membrane deployment, reducing the risk of contacting other objects, and ensuring the safety of the off - orbit sail deployment.

[0077] 3. After the off - orbit sail is deployed, the first spring 42 releases its elastic force, and the deployment mechanism 41 has a displacement equal to the height of the travel column. The fixed disk 452 on the travel column 45 contacts the convex platform on the outer surface of the platform 11 of the off - orbit sail container 1 and the outer shell of the timed unlocking mechanism 31 and is fixed on the convex platform of the platform 11 of the off - orbit sail container 1, thereby fixing the position of the deployment mechanism 41. After the fiber line 32 breaks, the two locking rods 21 are pushed open by the elastic force and are fixed at the fixing screws 23 on the outer surface of the platform 11 of the off - orbit sail container 1.

[0078] The specific application scenarios of the present invention are numerous. The above description is only the preferred embodiment of the present invention. It should be noted that the above embodiments are only used to illustrate the present invention and do not limit the protection scope of the present invention. For those of ordinary skill in the art of this technology, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A passive self-deployment deorbiting sail mechanism with delayed triggering, characterized in that: include: a deorbit sail container, the deorbit sail container being connected to a deorbit operation target; A locking device, the locking device being arranged on a flat outer surface of the off-orbit sail container; A timed unlocking device, the timed unlocking device being arranged on a flat outer surface of the deorbiting sail container; An unfolding device, the unfolding device comprising an unfolding mechanism, a spring, a delay trigger device, an elastic tape measure, and a travel column; When the deorbit sail is in a closed state, the unfolding device is in a locked state, the unfolding mechanism and spring 1 are compressed inside the deorbit sail container, the spring 1 is arranged between the inner surface of plane 1 of the deorbit sail container and the outer surface of platform 2 of the unfolding mechanism, and the upper and lower ends of the spring 1 are respectively connected to the inner surface of plane 1 and the outer surface of platform 2; the delay trigger device is arranged inside the deorbit sail container, the delay trigger device is connected to the unfolding mechanism and the delay trigger device can rotate around the central axis of the unfolding mechanism; the elastic tape measure is arranged inside the deorbit sail container, and the inner wall of the unfolding mechanism is connected to 4 The elastic tape measure is connected, and the elastic tape measure is connected to the sail membrane; the stroke column is vertically arranged at the center of the outer surface of the second platform, and the lower end of the stroke column is connected to the outer surface of the second platform and the upper end extends to the outside of the off-orbit sail container; the timed unlocking device includes a timed unlocking mechanism and a fiber line. The unlocking time can be pre-set through the timed unlocking mechanism. When the pre-set unlocking time is reached, the spring of the timed unlocking mechanism rotates, driving the reduction gear group to rotate. The last stage gear of the reduction gear group is connected to the cutting device. After the gear rotates a certain stroke, the cutting device directly cuts off the fiber line.

2. The passive self-deployment deorbiting sail mechanism with delayed triggering according to claim 1, characterized in that: The first spring is a conical spring.

3. The passive self-deployment deorbiting sail mechanism with delayed triggering according to claim 1, characterized in that: The time-delay trigger device is connected to the support column of the unfolding mechanism, the inclined surface on one side of the time-delay trigger device contacts the elastic tape measure and the sail film, and the root of the time-delay trigger device is connected to the rotating bearing and fixed to the unfolding mechanism.

4. The passive self-deployment deorbiting sail mechanism with delayed triggering according to claim 1, characterized in that: A locking block is arranged at the center of the second outer surface of the platform of the unfolding mechanism, the lower end of the stroke column is connected to the locking block, and the spring set is arranged outside the stroke column; the stroke column includes a stroke column body, a fixed plate arranged at the upper end of the stroke column body, a lower limiting block arranged at the lower end of the stroke column body, and a hexagonal fixed column.

5. The passive self-deployment deorbiting sail mechanism with delayed triggering according to claim 1, characterized in that: The locking device comprises: Locking rods, there are two locking rods, both of which are arranged on an outer surface of the off-orbit sail container plane and located on the left and right sides of the travel column; Spring 2, the two locking rods are connected via spring 2.

6. The passive self-deployment deorbiting sail mechanism with delayed triggering according to claim 5, characterized in that: The locking device also includes: A fixing screw is also provided on the plane outer surface of the deorbit sail container to limit the displacement of the locking rod.

7. The passive self-deployment deorbiting sail mechanism with delayed triggering according to claim 5, characterized in that: The timing unlocking mechanism is arranged on the outer surface of the plane one of the deorbit sail container and is located between the two locking rods; the spring two and the timing unlocking mechanism are respectively located at the upper and lower sides of the stroke column; the fiber line passes through the inside of the timing unlocking mechanism, and in the locked state, the fiber line fixes the position of the locking rod by tension.

8. The passive self-deployment deorbiting sail mechanism with delayed triggering according to claim 7, characterized in that: The fiber line is Dyneema fiber line.

9. The control method of the passive self-deployment de-orbiting sail mechanism with delayed triggering according to any one of claims 1 to 8, characterized in that: The invention comprises the following contents: an unlocking time t is preset in the timing unlocking device according to task requirement calculation; in the closed state of the off-orbit sail, the timing unlocking device fixes the position of the locking device, clamps the stroke column through the locking device, locks the unfolding mechanism, and the unfolding mechanism and spring 1 are compressed into the inside of the off-orbit sail container; when the unlocking time t is reached, the timing unlocking device releases the locking device, the locking device releases the stroke column, unlocks the unfolding mechanism, the spring 1 releases the elastic force to vertically eject the unfolding mechanism, the elastic tape measure detaches from the inner wall of the off-orbit sail container, starts to rotate and eject, the delay trigger device follows the movement of the elastic tape measure and increases the friction force, slows down the rotation speed of the elastic tape measure, and thus reduces the impact of the sail membrane unfolding process; wherein, the displacement of the unfolding mechanism is the designed length of the stroke column.

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