Stable floating processing method for flight recorder and flight recorder
By forming a notch array at specific locations of the antenna support components of the flight recorder and coating superhydrophobic materials, the problem of poor stability after entering the water of the flight recorder is solved, and the effect of the flight recorder stable floating on the water and normal signal transmission is achieved.
Patent Information
- Application Number
- CN202510242112.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2025-06-03
AI Technical Summary
Existing flight recorders have poor stability after entering the water, and cannot maintain or control their own posture, which may be unable to transmit signals to the outside world or maintain normal communication with satellites.
By determining the center of gravity position and the steady-center position of the flight recorder, if the center of gravity position is lower than the steady-center position, a notch array is formed at a specific position of the antenna support member and superhydrophobic material is applied to enhance the stable floating ability of the flight recorder.
It improves the stability of the flight recorder floating on the water, ensures that the antenna can be stabilized above the water surface or facing outside the water body, ensures normal signal transmission, and improves the recovery efficiency and effect of the flight recorder.
Smart Images
Figure CN120081003A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of aircraft avionics, and particularly to a method for stabilizing and floating a flight recorder and a flight recorder. Background Art
[0002] The Air France AF447 accident in 2009 and the Malaysia Airlines MH370 accident in 2014 caused a great shock globally, highlighting the limitations of the current air navigation system in failing to promptly identify and locate the position of a distressed aircraft, which led to delays or inability to recover the data of the flight recorders of the involved aircraft. Member states of the International Civil Aviation Organization (ICAO) and the global industry began to systematically promote aircraft tracking and monitoring work and carried out work on the technology of ejectable flight recorders.
[0003] An ejectable flight recorder is used to eject the flight recorder body from the aircraft by an ejection separation mechanism in case of a flight accident of the aircraft, so as to save flight data and for subsequent accident investigation. The stability of the attitude of the ejectable flight recorder after falling into water is related to whether the antenna emission surface can normally emit signals outward and whether it can maintain normal communication with satellites. Therefore, it is necessary to at least ensure that the surface of the integrated antenna of the flight recorder is stable on the water surface to ensure normal signal emission of the antenna.
[0004] However, the entry attitude of the flight recorder after ejection is random and it may fall into water at any angle and in any attitude. Moreover, the actual shape of the flight recorder is relatively complex. Currently, the flight recorder generally adopts a wing-type structure made of composite materials, and the flight recorder itself cannot weaken the impact generated by waves when facing large waves. This results in poor stability of the existing flight recorders after ejection and entry into water, inability to maintain or control its own attitude, and thus may be unable to normally emit signals externally or maintain normal communication with satellites, which is not conducive to promptly retrieving the flight recorder. Summary of the Invention
[0005] Embodiments of this specification provide a method for stabilizing and floating a flight recorder and a flight recorder to solve the technical problem of how to improve the entry stability of the flight recorder.
[0006] Embodiments of this specification provide a method for stabilizing and floating a flight recorder, and the method includes:
[0007] Determine the center of gravity position and the metacenter position of the flight recorder, and judge whether the center of gravity position is lower than the metacenter position;
[0008] If the center of gravity position is lower than the metacenter position, form a notch array at a specific position of the antenna support component of the flight recorder; wherein, the specific position is used to bear the impact of water body;
[0009] Coat the notch array with a superhydrophobic material.
[0010] Optionally, the specific position of the antenna support member is the periphery of the antenna support member.
[0011] Optionally, for a single side included in the specific position of the antenna support member, a preset distance is provided between adjacent notches on this side.
[0012] Optionally, a single notch of the notch array is an acute-angle notch.
[0013] Optionally, the opening angle of a single notch of the notch array is not less than 45° and not greater than 60°.
[0014] Optionally, the method further includes:
[0015] If the center-of-gravity position is not lower than the metacenter position, adjust the center-of-gravity position of the flight recorder so that the center-of-gravity position of the flight recorder is lower than the metacenter position.
[0016] Optionally, determining the center-of-gravity position of the flight recorder includes:
[0017] Calculate the center-of-gravity position of the flight recorder according to the length, width, and height of the flight recorder, as well as the composition material and density of the flight recorder;
[0018] And / or,
[0019] Adjusting the center-of-gravity position of the flight recorder includes:
[0020] Adjust the layout of each module of the flight recorder.
[0021] Optionally, the superhydrophobic material is coated on the inner surface of the notch.
[0022] An embodiment of this specification provides a flight recorder. The center-of-gravity position of the flight recorder is lower than the metacenter position. A notch array is formed at a specific position of the antenna support member of the flight recorder, and the notch array is coated with a superhydrophobic material; wherein, the specific position is used to withstand water impact.
[0023] Optionally, the superhydrophobic material is coated on the inner surface of the notch.
[0024] At least one of the above technical solutions adopted in the embodiments of this specification can achieve the following beneficial effects:
[0025] By forming a notch array at specific positions of the antenna support component of the flight recorder and combining with the design of the center of gravity position of the flight recorder, these processing methods can enhance the stability of the flight recorder floating on water, enable the flight recorder to float stably on water, so that the integrated antenna of the flight recorder can be stable above the water surface or facing outside the water body, ensure the normal signal transmission of the antenna, and improve the recovery efficiency and effect of the flight recorder. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the technical solutions in the embodiments of this specification or the prior art, the following will briefly describe the drawings required for use in the description of the embodiments of this specification or the prior art. Obviously, the following only illustrates the drawings required for some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0027] Figure 1 It is a schematic flowchart of the stable floating processing method for a flight recorder provided in the first embodiment of this specification.
[0028] Figure 2 It is a schematic flowchart of the stable floating processing in the first embodiment of this specification.
[0029] Figure 3 It is a schematic diagram of the center of gravity and metacenter positions during the process of the flight recorder in the first embodiment of this specification recovering from an inclined state to a stable state.
[0030] Figure 4 It is a schematic diagram of the surface shape of the notch of the flight recorder in the first embodiment of this specification. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0031] In order to enable those skilled in the art to better understand the technical solutions in this specification, the following will clearly and completely describe the technical solutions in the embodiments of this specification in conjunction with the drawings. Obviously, the embodiments involved in the detailed description are only some embodiments of this application, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the detailed description shall fall within the protection scope of this application.
[0032] The first embodiment of this specification (hereinafter referred to as "Embodiment 1") provides a stable floating processing method for a flight recorder. The execution subject of Embodiment 1 includes, but is not limited to, a terminal, a server, an operating system, or an application program. That is, the execution subject can be various and can be set, used, or transformed according to needs. In addition, a third-party application program can assist the execution subject in executing Embodiment 1. For example, the method provided by Embodiment 1 can be executed by a server, and a corresponding application program can be installed on a terminal (which can be held by a user). Data can be transmitted between the terminal or the application program and the server to assist the server in executing the method provided by Embodiment 1.
[0033] Reference Figure 1 and Figure 2 , the stable floating processing method for a flight recorder provided by Embodiment 1 includes:
[0034] S101: Determine the center of gravity position and the metacenter position of the flight recorder, and judge whether the center of gravity position is lower than the metacenter position;
[0035] In Embodiment 1, stable floating processing can be performed on a flight recorder product or a flight recorder design scheme, including performing stable floating processing on an existing flight recorder product or a flight recorder design scheme. Hereinafter, whether it is an actual flight recorder product (referred to as the initial product) or a flight recorder design scheme (referred to as the initial scheme), they are collectively referred to as the flight recorder.
[0036] For a flight recorder, an appropriate method can be determined to determine the center of gravity position and the metacenter position of the flight recorder.
[0037] For example, determining the center of gravity position of the flight recorder can include: According to the length, width, and height of the flight recorder (the length, width, and height are specifically determined according to the external dimensions of the flight recorder), as well as the constituent materials and density of the flight recorder, calculate the center of gravity position of the flight recorder. Specifically, tools such as CATIA can be used to calculate the center of gravity position of the flight recorder. For example, a flight recorder model can be constructed through these tools, and parameters such as the dimensions of the flight recorder, the constituent materials, and density values are set, and the measurement inertia tool is used to calculate the center of gravity position of the flight recorder. Reference Figure 3 , the center of gravity position of the flight recorder can be denoted as G, and the gravitational moment generated is e.
[0038] Reference Figure 3 , when the flight recorder is tilted, for example, tilted due to the impact force of water waves on the water, the center of buoyancy is D, and due to the tilt, the center of buoyancy position changes to D'. The intersection point of the force generated by the center of buoyancy D' and the floating axis is the metacenter M.
[0039] As described above, appropriate methods can be used to determine the center of gravity position and the metacenter position of an actual flight recorder product or design solution. However, for different flight recorder products or design solutions, their specific center of gravity positions or metacenter positions may vary. Embodiment 1 does not limit the specific center of gravity position and metacenter position.
[0040] After determining the center of gravity position and the metacenter position of the flight recorder, it is judged whether the center of gravity position is lower than the metacenter position.
[0041] S103: If the center of gravity position is lower than the metacenter position, a notch array is formed at a specific position of the antenna support member of the flight recorder; wherein, the specific position is used to withstand the impact of water.
[0042] Embodiment 1 proposes that the relative position between the center of buoyancy and the center of gravity of the floating body has a crucial impact on the stability of the floating body. However, it is not necessarily required that the center of gravity is below the center of buoyancy. Even if the center of gravity is above the center of buoyancy, it is still possible to be stable. Because after the floating body tilts, the shape of the part of the floating body immersed in the liquid changes, and the position of the center of buoyancy also changes accordingly. Under certain conditions, it is possible to have a reverse torque - the torque generated by the buoyancy at the new center of buoyancy action point relative to the original center of buoyancy, so that the floating body can still maintain its stability. Whether the floating body can return to the original equilibrium position after tilting depends on the relative position between the center of gravity and the metacenter. If the metacenter point is higher than the center of gravity point after the floating body tilts, a reverse torque will be generated due to the gravity and the buoyancy after tilting, causing the floating body to return to the original equilibrium position, thus achieving a stable equilibrium.
[0043] For the judgment result of whether the center of gravity position is lower than the metacenter position, the following is described in different cases:
[0044] Case 1: The center of gravity position is lower than the metacenter position
[0045] In Embodiment 1, to ensure that the upper surface of the flight recorder (i.e., the upper surface when the flight recorder antenna is facing up) is stable, it is necessary to make the center of gravity of the flight recorder lower than the metacenter. For example Figure 3 As shown, assuming that the reverse torque generated at the metacenter when the flight recorder tilts is ρ, since the metacenter point is higher than the center of gravity point, the reverse torque ρ > the center of gravity torque e, so that the flight recorder can be restored to the expected equilibrium position or equilibrium state, thus achieving the effect of stable equilibrium of the flight recorder.
[0046] If it is judged that the center of gravity position of the flight recorder is lower than its metacenter position, a notch array is formed at a specific position of the antenna support member of the flight recorder; wherein, the specific position is used to withstand the impact of water.
[0047] In an actual flight recorder, the flight recorder antenna (including an integrated antenna) is disposed on a certain or certain components or structures, and this or these components or structures can be antenna support components. That is, this or these components or structures can serve as the installation position of the flight recorder antenna and support the flight recorder antenna. The specific shape of the antenna support component is not limited in the first embodiment. For example Figure 4 in, the flight recorder antenna is disposed on a rectangular plate-like component, and the rectangular plate-like component is the antenna support component.
[0048] For an actual antenna support component, it is possible to estimate which positions of the antenna support component will be impacted by water after the flight recorder falls into water; or it is possible to determine which positions need (or are expected to) withstand water impact after the flight recorder falls into water. These positions of the antenna support component that may be impacted by water or need (or are expected to) withstand water impact are referred to as specific positions of the antenna support component. In the first embodiment, the function of the specific position of the antenna support component is to withstand water impact after the flight recorder falls into water. For example Figure 4 in, it is estimated that after the flight recorder enters the water, the four sides of the antenna support component will be impacted by water or need (or are expected to) withstand water impact, then the four sides of the antenna support component are its specific positions.
[0049] In the first embodiment, if the center of gravity position is lower than the metacenter position, a notch array is formed at the specific position of the antenna support component, that is, notches are constructed at the specific position of the antenna support component, and the constructed notches are arranged in an array, so that the overall constructed notches are called a notch array.
[0050] Preferably, the specific position of the antenna support component is the periphery of the antenna support component. For example Figure 4 in, if the antenna support component is a rectangular plate-like component, then the specific position of the antenna support component can be the four sides of the periphery of the antenna support component.
[0051] In the first embodiment, regardless of the shape of the antenna support component, the specific position of the antenna support component generally has one or more sides. For example, if the specific position of the antenna support component is its periphery, the periphery of the antenna support component can be formed by connecting one or more sides. For a single side included in the specific position of the antenna support component, a notch array can be formed on or on the surface of the side, and in the notch array of the side, a preset distance is provided between any two adjacent notches. Further, the notch arrays of the respective sides included in the specific position of the antenna support component can be of the same form or the same structure or the same size. For example Figure 4 in, on the respective sides included in the specific position of the antenna support component, a plurality of notches are arranged side by side to form an array, so that the respective sides form a notch array of the same form, and a preset distance is provided between the adjacent notches of each side.
[0052] In the first embodiment, a single notch in the notch array may be an acute-angle notch, that is, the opening of a single notch is an acute angle, the vertex of the acute angle extends into the interior of the antenna support component of the flight recorder, and the acute-angle opening faces outward.
[0053] Preferably, the opening angle of a single notch is not less than 45° and not greater than 60°.
[0054] Case 2: The center-of-gravity position is not lower than the metacenter position
[0055] If it is determined that the center-of-gravity position of the flight recorder is not lower than its metacenter position, then adjust the center-of-gravity position of the flight recorder so that the center-of-gravity position of the flight recorder is lower than its metacenter position.
[0056] Among them, adjusting the center-of-gravity position of the flight recorder may include: adjusting the layout of each module of the flight recorder. What specific modules the flight recorder includes and how to specifically adjust the layout of each module are not limited in the first embodiment.
[0057] In the first embodiment, after adjusting the center-of-gravity position of the flight recorder, continue to determine whether the adjusted center-of-gravity position of the flight recorder is lower than its metacenter position. If the adjusted center-of-gravity position of the flight recorder is still not lower than its metacenter position, then continue to adjust the center-of-gravity position of the flight recorder and continue to determine whether the adjusted center-of-gravity position of the flight recorder is lower than its metacenter position. It can be seen that adjusting the center-of-gravity position of the flight recorder may need to be performed one or more times. That is, after each adjustment of the center-of-gravity position of the flight recorder, it is judged whether the adjusted center-of-gravity position of the flight recorder is lower than its metacenter position; if the adjusted center-of-gravity position of the flight recorder is still not lower than its metacenter position, then continue to adjust the center-of-gravity position of the flight recorder and continue to determine whether the adjusted center-of-gravity position of the flight recorder is lower than its metacenter position.
[0058] If the adjusted center-of-gravity position of the flight recorder satisfies being lower than its metacenter position, then on this basis, refer to Case 1 for processing to form a notch array at a specific position of the antenna support component of the flight recorder.
[0059] S105: Coat the notch array with a superhydrophobic material.
[0060] In the first embodiment, coat the notch array with a superhydrophobic material. Preferably, the superhydrophobic material is coated on the inner surface of each notch. The specific model or type of the superhydrophobic material is not limited in the first embodiment.
[0061] Through the above content, a flight recorder product after stable floating treatment can be obtained on the basis of the foregoing initial product, or a flight recorder design scheme after stable floating treatment can be obtained on the basis of the foregoing initial scheme, and the flight recorder product can be manufactured according to the flight recorder design scheme after stable floating treatment.
[0062] Embodiment 1 can achieve the following beneficial effects:
[0063] By forming a notch array at a specific position of the antenna support component of the flight recorder and combining floating treatment means such as the design of the center of gravity position of the flight recorder (i.e., the center of gravity position is lower than the metacenter position), when the flight recorder enters the water due to reasons such as falling, it can reduce the impact of water body or water wave impact on the floating stability of the flight recorder, improve the floating stability and impact resistance of the flight recorder, especially the antenna support component, so that the antenna support component can float stably towards the water body (i.e., the flight recorder, especially the antenna support component of the flight recorder, floats stably on the water), and the flight recorder antenna supported by the antenna support mechanism (or the surface of the antenna) can be above the water body or towards the outside of the water body, that is, the antenna is exposed above the water surface and is in an upward form, ensuring normal signal transmission of the antenna and improving the recovery efficiency and effect of the flight recorder.
[0064] Specifically, since the specific position of the antenna support component of the flight recorder is itself used to withstand the impact of the water body, after the flight recorder enters the water, the notch array at the specific position can reduce the impact of the water body or water wave impact on the floating stability of the flight recorder, improve the floating stability and impact resistance of the flight recorder, especially the antenna support component, so that the antenna support component can float stably towards the water body (i.e., the antenna support component floats stably on the water), and the flight recorder antenna supported by the antenna support mechanism can be above the water body or towards the outside of the water body, that is, the antenna is exposed above the water surface and is in an upward form, and then can stably transmit signals outward, facilitating the discovery and recovery of the flight recorder.
[0065] Especially, the notch array on the opposite surface of the specific position of the antenna support component of the flight recorder can take the external shape structure of a water lily leaf as the design core (for example Figure 4 as shown), and adopt an array arrangement of acute-angle notches. This form of notch array can further reduce the impact of water wave impact on the floating stability of the flight recorder, further improve the floating stability and impact resistance of the flight recorder, especially the antenna support component, so that the antenna support mechanism can float more stably on the water, and the flight recorder antenna can be stable above the water body or towards the outside of the water body.
[0066] Especially, a single notch is designed as an acute angle, and the acute angle can be further set to be not less than 45° and not more than 60°. It has been verified that this notch angle design will neither cause stress concentration due to too small a notch angle, increase the risk of structural damage of the flight recorder and problems such as uneven buoyancy distribution of the flight recorder, nor can it maximize the floating stability and impact resistance of the flight recorder, especially the antenna support component, and achieve a balance between reducing the resistance of the flight recorder in the air and water body and ensuring the floating stability of the flight recorder.
[0067] Since the notch of the flight recorder is coated with superhydrophobic material, this processing method enables the water body (i.e., the water body located within the notch) between the parts coated with the superhydrophobic material of each notch to serve as a buffer layer to buffer the impact of the water body on the flight recorder, reduce the influence of the water body impact force, which can not only increase the floating stability of the flight recorder, especially the antenna support component, but also reduce the use of superhydrophobic material on the remaining outer surface of the flight recorder and lower the cost.
[0068] The first embodiment adopts a method for designing the center of gravity position adapted to the structure of the flight recorder, calculates the center of gravity position and metacenter position of the flight recorder in combination with parameters such as the material, shape, and size of the flight recorder, and adaptively adjusts the module layout of the flight recorder, which can more quickly and accurately achieve that the center of gravity position of the flight recorder is lower than its metacenter position, and improve the efficiency of stable floating treatment of the aircraft.
[0069] The second embodiment of this specification provides a flight recorder corresponding to the method described in the first embodiment. The center of gravity position of the flight recorder is lower than the metacenter position. A notch array is formed at a specific position of the antenna support component of the flight recorder, and the notch array is coated with superhydrophobic material; wherein, the specific position is used to withstand the impact of the water body.
[0070] Preferably, the superhydrophobic material is coated on the inner surface of the notch.
[0071] The flight recorder of the second embodiment can be obtained by the method described in the first embodiment. For the parts not described in detail in the second embodiment, refer to the first embodiment. The second embodiment can achieve the same beneficial effects as the first embodiment, and the above embodiments can be used in combination.
[0072] The above is only for the embodiments of this specification and is not used to limit this application. For those skilled in the art, various changes and modifications can be made to this application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.
Claims
1. A stable floating processing method for a flight recorder, characterized in that: The method comprises: determining a center of gravity position and a metacentric position of the flight recorder, and determining whether the center of gravity position is lower than the metacentric position; If the center of gravity position is lower than the metacentric position, a notch array is formed at a specific position of the antenna supporting component of the flight recorder; wherein the specific position is used to withstand water impact; The notch array is coated with a superhydrophobic material.
2. The method according to claim 1, characterized in that The specific position of the antenna supporting component is the periphery of the antenna supporting component.
3. The method according to claim 1, characterized in that For a single edge included in a specific position of the antenna supporting component, adjacent notches on the edge are spaced apart by a preset distance.
4. The method according to any one of claims 1 to 3, characterized in that A single notch in the notch array is an acute-angle notch.
5. The method according to claim 4, characterized in that The opening angle of a single notch in the notch array is not less than 45° and not more than 60°.
6. The method according to claim 1, characterized in that The method further comprises: If the center of gravity position is not lower than the metacentric position, the center of gravity position of the flight recorder is adjusted so that the center of gravity position of the flight recorder is lower than the metacentric position.
7. The method according to claim 1, characterized in that Determining the center of gravity of the flight recorder involves: Calculate the center of gravity of the flight recorder based on the length, width, height, and the material and density of the flight recorder; and / or, Adjusting the center of gravity position of the flight recorder includes: Adjust the layout of each module of the flight recorder.
8. The method according to claim 1, characterized in that The super hydrophobic material is coated on the inner surface of the notch.
9. A flight recorder, characterized in that: The center of gravity of the flight recorder is lower than the metacentric position, and a notch array is formed at a specific position of the antenna supporting component of the flight recorder, and the notch array is coated with a super-hydrophobic material; wherein the specific position is used to withstand water impact.
10. The flight recorder according to claim 9, characterized in that: The super hydrophobic material is coated on the inner surface of the notch.