CN111891386A - Three-dimensional modular structure for supporting multiple loads - Google Patents
Three-dimensional modular structure for supporting multiple loads Download PDFInfo
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- CN111891386A CN111891386A CN202010621512.5A CN202010621512A CN111891386A CN 111891386 A CN111891386 A CN 111891386A CN 202010621512 A CN202010621512 A CN 202010621512A CN 111891386 A CN111891386 A CN 111891386A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/10—Artificial satellites; Systems of such satellites; Interplanetary vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
- B64G1/66—Arrangements or adaptations of apparatus or instruments, not otherwise provided for
Abstract
The invention relates to a three-dimensional modular structure for supporting multiple loads, which comprises a three-dimensional modular supporting plate, a structural interface and a load equipment interface; the three-dimensional module type supporting plate is of a criss-cross sash structure, and each frame of the sash is provided with an I-shaped beam in section; the lower surface of the three-dimensional modular supporting plate is a plane, and the upper surface is provided with a local convex structure for mounting a first camera and a second camera, so that different angles are formed between the first camera and the second camera and the lower load cabin; the three-dimensional modular supporting plate is provided with a structure interface and a loading equipment interface along the transverse direction and the longitudinal direction. The invention meets the structural requirement of the high-performance remote sensing satellite for simultaneously supporting various main loads, achieves the high-dimensional stability design index that the on-orbit pointing included angle of high-precision equipment associated with a plurality of observation directions is kept unchanged for a long time, realizes the assembly mode that the assembly equipment and the platform of a plurality of loads on a three-dimensional modular structure are assembled in parallel by modular assembly, and effectively improves the working efficiency.
Description
Technical Field
The invention belongs to the field of spacecraft structures, and relates to a supporting structure.
Background
In the field of remote sensing satellites, the main development direction of a novel satellite is the improvement or expansion of the performance of a high-performance camera or SAR antenna, and the diversity and the versatility of carried loads, along with the rapid development of the technology, each load not only has a strong function, but also enhances the relevance between the loads, and even puts forward various associated requirements on the whole satellite, so that in the novel remote sensing satellite, the relevance between the performances of all subsystems is more, and more new performance services are required to be provided for the whole satellite.
When pursuing higher and stronger performance of the effective load equipment, the support structure of the effective load faces various more complex problems, firstly, the support structure faces the problem of high bearing of the interface, and simultaneously, when multiple loads are assembled together, the support structure faces the problem of different mechanical properties of each equipment, which causes different bearing performance of the interface; secondly, the load devices are multiple, the assembly types are different, the pointing difference is large, and the problem that the size of the bearing structure is stable in three-dimensional dimension needs to be faced to ensure that the in-orbit pointing relationship of all the devices is stable and unchanged; thirdly, when various load devices are assembled on the star, the problem of long total assembly period of the whole star is caused by the working mode of series connection.
The effective use of the high-performance satellite lies in the stable use of loads, for an optical remote sensing satellite, optical load equipment on the satellite is a main payload, along with the improvement of the performance of the whole satellite, a single load can not meet the requirement, therefore, when a plurality of payloads are loaded on the satellite simultaneously, associated use requirements can exist among the payloads, for example, the pointing relation among a plurality of equipment such as two cameras, a range finder and a ground sensor on a remote sensing satellite needs to be kept unchanged during the orbit, in order to meet the use requirements, a plurality of loads need to be assembled on the same supporting structure, namely, a three-dimensional modular structure, the structure needs to meet the requirement of the difference support of the multiple loads and the requirement of the dimensional stability of a three-dimensional space, in order to meet different requirements, the design of the structure can inevitably generate the following problems:
(1) the three-dimensional modular structure faces the problem of high bearing capacity of the interface, and simultaneously faces the problem of different bearing performances of the interface caused by different mechanical characteristics of each device during multi-load assembly.
In order to ensure that the related space direction among different loads is stable and unchanged, firstly, assembly system errors caused by split assembly need to be avoided, therefore, common assembly needs to be selected, namely, the loads related to space angle indexes are assembled on the same supporting structure, but the common assembly can not avoid the problem of loads with different weights, and the common assembly also has different numbers and different types of connecting interface forms, requires different bearing capacities of the mounting interfaces, and realizes different personalized interface modes on the whole supporting structure.
(2) The load-bearing structure has a plurality of load-bearing devices and different assembly types, and the problem of dimensional stability of the load-bearing structure in three-dimensional dimension is faced to ensure that the in-orbit pointing relationship of all the devices is stable and unchanged.
All the effective loads on the satellite point to different directions, the size stability design in a certain direction is easy to realize through the design in a single direction, however, when a common structure is provided with a plurality of loads in a plurality of directions, the common structure needs to realize dimensional stability in three dimensions, namely, the design is changed from the one-way and plane stability design to the three-dimensional stability design, if the material is homogeneous, the material is easy to be designed into a structure with consistent three-dimensional deformation state or stable shape and dimension, however, the homogeneous material with extremely low thermal expansion coefficient is invar steel, the material has high density, the design of a large-size structure is difficult to realize light design, the design requirement of a spacecraft structure cannot be met, therefore, when selecting materials with a low expansion coefficient, heterogeneous lightweight carbon fiber composite materials are preferred, but the anisotropic characteristic of the carbon fiber composite material makes the design of a three-dimensional size-stable structure extremely difficult.
(3) When various load devices are assembled on a satellite, the problem of long total assembly period of the whole satellite is caused by the working modes of series connection.
In a conventional satellite, main load equipment is assembled on a main structure of the whole satellite, the main structure is limited by an operating environment of the main structure, other equipment cannot be operated simultaneously when the load equipment is used for loading, in a conventional assembly relation, a common satellite is single main load equipment, if one or two pieces of equipment are used for loading, the equipment is used for loading, but for the loading of a plurality of main load equipment, the front and back series inevitably brings long assembly time, and the main problem of influencing the assembly period of the whole satellite is solved.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: aiming at the technical problems, the three-dimensional modular structure is required to be suitable for simultaneously loading a plurality of payload devices, the aims of light design, interface differentiation and stable and unchangeable on-orbit pointing direction of each device can be achieved, and based on the consideration of the factors, the three-dimensional modular structure for supporting the multiple loads is provided so as to meet the design requirement of a high-performance remote sensing satellite on a structure for simultaneously supporting multiple main loads.
The technical scheme adopted by the invention is as follows: a three-dimensional modular structure for supporting multiple loads comprises a three-dimensional modular supporting plate, a structural interface and a load equipment interface;
the three-dimensional module type supporting plate is of a criss-cross sash structure, and each frame of the sash is provided with an I-shaped beam in section; the three-dimensional modular support plate takes a rectangular equal-height frame on the lower surface as a base surface, and the upper surface is provided with local convex structures with different heights for mounting a first camera and a second camera, so that the first camera and the second camera form different angles with a lower load cabin; the three-dimensional modular supporting plate is provided with a plurality of structural interfaces and loading equipment interfaces except for a camera interface along the transverse direction and the longitudinal direction.
The convex structure comprises a camera mounting surface, the lower part of the camera mounting surface is supported by a cross rib formed by a web plate of an I-shaped beam, and each outer side plate surrounds the periphery of the cross rib to form an inclined trapezoidal quadrangular frustum structure.
The load equipment interface comprises an angle box, a metal support, an interface part, a heat insulation pad and a trimming gasket; the angle box is arranged below a camera mounting surface of the three-dimensional module type supporting plate and above a distance meter mounting position in the middle of the three-dimensional module type supporting plate, a metal support is arranged in the angle box, a matching port part is arranged in the metal support, a heat insulation pad is adhered to the surface of the interface part, and an aluminum alloy trimming gasket is adhered to the surface of the heat insulation pad to form a group of load equipment interfaces; the metal support is directly lined on the three-dimensional modular support plate, the heat insulation pad is pasted on the outer surface of the metal support or the outer surface of a wing plate of the three-dimensional modular support plate, and the trimming gasket is pasted on the surface of the heat insulation pad to form another group of load equipment interfaces.
The structural interface comprises round gaskets and a heat insulation pad, wherein the lower end face of the three-dimensional modular supporting plate is transversely and longitudinally pasted with the round gaskets, and the heat insulation pad is pasted on the surface of each round gasket to form the structural interface.
The utility model provides a support three-dimensional modular structure of many loads, still includes long gasket, pastes 1 or 2 long gaskets of parallel paste respectively at the web surface of the web of three-dimensional modular backup pad at the internal surface of corner box after the web laminating of three-dimensional modular backup pad, and through two screws 4 parts cluster together inside and outside on every long gasket, fastens with the screw, and the use quantity of the long gasket in every corner box must not be less than 2, does not exceed 4, and inside and outside surface symmetry uses.
The utility model provides a support three-dimensional modular structure of many loads, still includes the isolation pad, and three-dimensional modular backup pad outside lower extreme I-beam web lateral surface pastes the isolation pad that has dodge the hoist, and the quantity that the isolation pad was pasted to the surface of every outside web is 2 ~ 3, implements the equidistance equipartition.
The three-dimensional modular supporting plate is provided with a first protruding structure, a second protruding structure, a third protruding structure and a fourth protruding structure; the first protruding structure and the second protruding structure are positioned at one side edge of the three-dimensional modular supporting plate, and the third protruding structure and the fourth protruding structure are positioned at the other side edge of the three-dimensional modular supporting plate; the first protruding structure and the third protruding structure are used for mounting a first camera, the widths of camera mounting surfaces of the first protruding structure and the third protruding structure are the same, and the first protruding structure is higher than the third protruding structure; the second protruding structure and the fourth protruding structure are used for installing a second camera, the width of the camera installation surface of the second protruding structure is the same as that of the camera installation surface of the fourth protruding structure, and the fourth protruding structure is higher than the second protruding structure.
The three-dimensional modular supporting plate and the part corner box are made of all-carbon fiber resin matrix composite materials.
The metal support and the interface part are made of titanium alloy.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention realizes the reliable support of multi-direction and multi-equipment by a method of common body support and local reinforcement. The main load equipment of the satellite with high pointing accuracy requirement comprises three equipment, including two cameras, a distance measuring instrument, and other equipment closely related to the main load equipment, such as a gyroscope, a momentum wheel and the like, wherein the weight of the main load is the largest, in order to realize the integrated installation, an integral installation structure is designed on the top of the load cabin, namely a three-dimensional modular structure, two cameras with the weight of about 600kg are assembled on the upper surface of the structure, a range finder with the weight of about 200kg is hung and assembled on the lower surface of the structure, a plurality of devices are respectively assembled at the upper part and the lower part of the device, the requirements of the combination body on the mode are met through the rigidity design, the light design of different interfaces is realized and the requirements of local strength are met through a differential local strengthening design method aiming at various different interfaces, the single bearing area of the camera can bear the load of about 35kN at most, and the single point in the connecting point of the lower-end distance meter can bear the pull force of 13.5kN and the shearing force of 13kN at most.
(2) The invention realizes the three-dimensional stability design, ensures the on-orbit pointing stability of multiple devices, realizes the performance design of the dimensional stability through the combined design of materials and configurations for three main load devices with high pointing accuracy, selects the high-modulus carbon fiber resin matrix composite material with comprehensively optimal thermal expansion coefficient and mechanical property, optimizes the topological configuration characteristics of material continuity, and finally achieves the index requirement that the change of the included angle is less than 0.5 arc second.
(3) The invention adopts the assembly mode of realizing the parallel connection with the star body by the modularized assembly, thereby realizing the beneficial effect of improving the efficiency. Compared with the prior art that various devices on a load cabin are installed on the cabin plate in series by one piece or even the cabin plate is detached, a protection plate is installed, the devices are installed and then returned to the star or the devices are installed on the star and then returned to the outer side plate, the whole process is complicated, most of the devices on the star load cabin are all installed on a three-dimensional modular structure, the structure can be assembled outside the cabin independently, other assembling work on the cabin is not influenced, the three-dimensional modular structure has excellent integrity and openness, when the devices are assembled, a plurality of devices can be assembled simultaneously in a plurality of areas, the assembling efficiency is further improved, and a very beneficial engineering implementation effect is achieved.
Drawings
FIG. 1 is a schematic view of a layout of two cameras and rangefinders in a load compartment;
FIG. 2 is a schematic view of a three-dimensional modular construction; wherein, fig. 2(a) is a top view structural diagram; fig. 2(b) is a bottom view configuration diagram.
FIG. 3 is a schematic view of a camera interface design; wherein, fig. 3(a) is a partial view of a camera interface thereof; FIG. 3(b) is a cross-sectional view of a camera interface thereof;
FIG. 4 is a schematic diagram of a two-camera interface design thereof; wherein, fig. 4(a) is a partial view of the two-camera interface thereof; FIG. 3(b) is a cross-sectional view of a two-camera interface thereof;
FIG. 5 is a schematic diagram of a rangefinder interface design; wherein, fig. 5(a) is a local view of the interface of the range finder; FIG. 5(b) is a cross-sectional view of a range finder interface;
FIG. 6 is a schematic diagram of a middle three-point gyroscope interface enhancement design; wherein, fig. 6(a) is an interface layout diagram; FIG. 6(b) is a cross-sectional view of the external interface; FIG. 6(c) is a cross-sectional view of the stent body interface;
FIG. 7 is a schematic diagram of an end three-point gyroscope interface enhancement design; wherein, fig. 7(a) is an interface layout diagram; FIG. 7(b) is a cross-sectional view of the external interface; FIG. 7(c) is a cross-sectional view of the stent body interface;
FIG. 8 is a schematic diagram of a design of a multi-point gyroscope interface; wherein, fig. 8(a) is an interface layout diagram; FIG. 8(b) is a cross-sectional view of the stent body interface; FIG. 8(c) is a cross-sectional view of the external interface; FIG. 8(d) is a cross-sectional view of the stent body interface;
FIG. 9 is a schematic diagram of a ground-sensitive interface design; FIG. 9(a) is a layout diagram of an interface; FIG. 9(b) is a cross-sectional view of the interface;
FIG. 10 is a spreader isolation plan;
FIG. 11 is a cross-sectional view of a spreader isolation design;
FIG. 12 is a schematic diagram of a fabric interface design; FIG. 12(a) is an inner surface view of the mouthpiece; FIG. 12(b) is a cross-sectional view of the interface;
fig. 13 is a schematic view of a partially raised structure design of a three-dimensional modular structural body.
Detailed Description
The invention is further illustrated by the following examples.
Example 1
The invention is further explained by taking a three-dimensional modular structure for supporting multiple loads on a certain satellite as an example with reference to the attached drawings, and the external dimension of the product is 1780mm multiplied by 1980mm multiplied by 860 mm.
The three-dimensional modular structure for supporting multiple loads is an assembly formed by multiple components, as shown in fig. 2, and the combination mode is as follows:
the three-dimensional modular structure 14 for supporting multiple loads comprises a three-dimensional modular supporting plate 1, a corner box 2, a metal support 3, an interface part 4, a heat insulation pad 5, a long gasket 6, a round gasket 7, a trimming gasket 8 and an isolation pad 9;
the three-dimensional modular supporting plate 1 is provided with a first camera 10 interface, a second camera 11 interface, a range finder 12 interface, a middle three-point gyroscope interface, an end three-point gyroscope interface, a multi-point gyroscope interface, a ground sensitive interface and a lifting appliance;
the three-dimensional modular support plate 1 is provided with a first convex structure 1-1, a second convex structure 1-2, a third convex structure 1-3 and a fourth convex structure 1-4; the first projection structure 1-1, the second projection structure 1-2, the third projection structure 1-3 and the fourth projection structure 1-4 are all trapezoidal structures, the first projection structure 1-1 and the second projection structure 1-2 are located at one side of the three-dimensional modular support plate 1, and the third projection structure 1-3 and the fourth projection structure 1-4 are located at the other side of the three-dimensional modular support plate 1; the first convex structure 1-1 and the third convex structure 1-3 are used for mounting a first camera 10, the widths of the camera mounting surfaces 15 of the first convex structure 1-1 and the third convex structure 1-3 are the same, and the first convex structure 1-1 is higher than the third convex structure 1-3; the second convex structure 1-2 and the fourth convex structure 1-4 are used for mounting a second camera 11, the widths of the camera mounting surfaces 15 of the second convex structure 1-2 and the fourth convex structure 1-4 are the same, and the fourth convex structure 1-4 is higher than the second convex structure 1-2;
the three-dimensional modular support plate 1 is a main structure and also an assembly foundation, the lower surface of the upper flanging of the three-dimensional modular support plate 1 is provided with an angle box 2 and a metal support 3, a metal support 3 is assembled in the corner box 2, a matching port part 4 is assembled in the metal support 3, a heat insulation pad 5 is adhered on the surface of the port part 4, a trimming gasket 8 is adhered on the surface of the heat insulation pad 5 to form a load equipment connecting port, a long gasket 6 is adhered on the joint surface of the corner box 2 and the web plate of the three-dimensional modular support plate 1, and the three-dimensional modular supporting plate 1 is connected with the angle box 2 and the metal support 3 through connecting screws, which is the realization form of the main equipment connecting interface, for the connection interface between the conventional structures, the upper surface and the lower surface of the flanging of the three-dimensional modular support plate 1 are adhered with round gaskets 7, and a heat insulation pad 5 is adhered to the surface of the round gasket 7 to form a structural interface, and an isolation pad 9 avoiding a lifting appliance is adhered to the side edge of the three-dimensional modular supporting plate 1.
The composite material is designed in a main body structure in a consistent manner by optimizing the design based on the overall continuity of the material and the relevance of the material and the configuration, so that the material is ensured to be uniform and continuous, the design with high rigidity and three-dimensional stability is achieved, and meanwhile, the quality optimization layout is realized by the topological design, and the light design goal is achieved.
The three-dimensional modular support plate 1 is a main structure and is designed with a configuration-based dimensionally stable material, the basic unit of the material layer is (0 °/+45 °/-45 °/90 °)sAnd the 0 degree layer is along the height direction (860mm dimension direction), based on the unit to carry out the combined laying design, the corner box 2 needs to be lined in the three-dimensional modular support plate 1, as shown in fig. 3(a), 3(b), 4(a), 4(b), 5(a) and 5(b), the corner box 2 is a composite material structure, the design mode of the material is consistent with that of the three-dimensional modular support plate 1, the material design states of the two large-dimension structures of the three-dimensional modular support plate 1 and the corner box 2 which can affect the dimension stability in a local area are the same, namely, the main body structure and the reinforcing body are consistent in material design, and the performance difference caused by different materials can not be introduced. The configuration design implementation mode is that large-scale common interfaces and load equipment interfaces are respectively designed, and from the angle of configuration light-weight design, local and overall coordinated design is carried out, namely, the overall continuity of a main force transmission rib (a web plate of an I-shaped beam) is ensured, a large number of structural interfaces are positioned on the lower surface of the three-dimensional modular support plate 1, and as shown in fig. 1 and 2(b), the end is designed into a continuous large surface; the upper surface of the three-dimensional modular structure is provided with a load equipment interface, as shown in figures 1 and 2(a), the upper interface and the lower interface are comprehensively considered, the main force transmission rib is distributed to form an orthogonal frame structure, local targeted support design is carried out according to the difference of the interface positions of load equipment and the inconsistency of rigidity performance requirements, an angle box 2 is assembled in the inner surfaces of a web plate and a wing plate of a three-dimensional modular support plate 1, and a metal support 3 is lined in the angle box 2 to complete the local rigidity improvement of the load equipment interfaceAs shown in FIGS. 3-5, the implementation mode aiming at the local strong support of the interface of the load equipment can effectively ensure the local higher rigidity requirement.
The three-dimensional modular support plate 1 is made of all-carbon fiber resin-based composite materials and designed into an integral structure, in a criss-cross lattice structure, the fiber direction is along the topological configuration of an I-shaped beam, continuous laying is achieved, the use of the all-carbon fiber composite materials in the main structure ensures that the coefficient of thermal expansion of materials serving as a structural foundation is extremely small, the continuous laying of the fibers achieves continuity of material properties, simulation analysis based on the configuration ensures that the material laying parameters are optimal, in order to reduce deformation interference of auxiliary parts, the all-carbon fiber resin-based composite materials identical to the three-dimensional modular support plate 1 are also selected for the large-size part corner box 2, and the metal support 3 and the interface part 4 are made of titanium alloys with smaller coefficient of thermal expansion in metal materials.
In order to reduce the entity to the maximum extent and realize the light body design, the three-dimensional module type supporting plate 1 is designed into a criss-cross sash structure, each frame of the sash is in the structural form of an I-beam with the cross section of 4mm, the I-beam can effectively realize the bearing effect of in-plane load transfer and out-of-plane rigidity support, the design principle of the size of the lattices in the structure is that the lattices are as large as possible, and the specifications of the lattices are as consistent as possible, on the premise of this principle, the design of each frame position of the sash mainly depends on the position of the interface and the requirement of the force transmission path, the interface requirements come from two aspects, namely a structure interface connected with a satellite and an interface of a load device, the structure interface and the interface of the load device mostly run along Z, Y two-directional reference of a three-dimensional modular structure, as shown in fig. 2(a) and 2(b), the positions of the i-shaped frame are designed into a criss-cross orthogonal lattice form. Meanwhile, according to the requirement of main load direction, the direction of the distance measuring instrument 12 is parallel to the Z direction of the whole star, and the equipment is positioned in the load cabin 13, therefore, the interface of the distance measuring instrument 12 is parallel to the structural installation surface, namely, the lower end surface of the three-dimensional modular structure is in a planar design state, two cameras are installed at the top of the load cabin 13, and a pitch included angle exists between the two cameras and the horizontal reference surface of the whole star, therefore, a local convex structure is designed on the upper surface of the three-dimensional modular structure, as shown in fig. 13, and only a convex structure is formed at the installation position, namely, the convex structure extends out from the front and back frame positions of the interface, the upper end camera installation surface 15 of the convex structure is designed to form an included angle of 10 degrees and 21 degrees with the horizontal plane according to the pitch angle of the two cameras, the two cameras respectively have 6 groups of camera interfaces which are respectively concentrated at the front and back two area positions, each, the width of the camera mounting surface 15 is about 200mm, the projection structure is in a trapezoidal quadrangular frustum pyramid form that a middle cross rib 16 supports and a web plate surrounds the periphery, has better support rigidity, has a good material continuity relation with the lower end surface of the three-dimensional modular structure, and better realizes the support of various loads and meets the requirements of various performances no matter from the effectiveness of load transfer or the retentivity of stable dimension.
The configurations and performances of the various load local interfaces with different bearing requirements are as follows: because the size, the weight, the number of interfaces and the position of various load devices are different, in order to carry out adaptive design aiming at different interface requirements, optimize configuration resources, the following implementation measures are carried out:
the large-volume and heavy-weight equipment interface embodiment mainly based on a camera and a range finder 12 is a multi-part combined reinforced interface, an upper wing plate of a three-dimensional modular support plate 1 is enlarged in a local area for mounting the camera, a corner box 2 is lined between the upper wing plate and a web plate, a glued metal support 3 is assembled in the corner box 2, an interface part 4 is arranged in the metal support 3 and outside the metal support 3, a heat insulation pad 5 is pasted on the outer surface of the interface part 4, a trimming gasket 8 is pasted on the heat insulation pad 5, so that the parts form a combined interface together through room temperature curing glue pressure gluing, and the three-dimensional modular support plate 1, the corner box 2 and the metal support 3 are firmly connected together through a large thread (such as M16-M20) connection form of the metal support 3 and the interface part 4, such as figure 3(a), figure 3(b), figure 4(a), figure 4(b), figure 5(a), As shown in figure 5(b), a connecting screw is added between the large corner box 2 and the web plate of the three-dimensional modular support plate 1, and the glue-screw connection can not only ensure the glue-connection quality in the assembly process, but also improve the anti-stripping capability between the parts. The comprehensive implementation result can improve the local rigidity and the strength of a large bearing area, and ensure that the load is quickly and stably transmitted from the interface to be uniform force, and the whole star vibration test and the static test result of the three-dimensional modular structure show that the single bearing area of the camera at the upper end of the three-dimensional modular structure can bear the load of about 35kN at most, and the single point in the connecting point of the range finder 12 at the lower end can bear the pull force of 13.5kN and the shearing force of 13kN at most.
For interfaces with smaller bearing requirements (such as gyros and ground sensors), a metal support 3 can be directly lined in the three-dimensional modular support plate 1, a heat insulation pad 5 is adhered to the outer surface of the metal support 3 or the outer surface of a wing plate of the three-dimensional modular support plate 1, and a trimming gasket 8 is adhered to the outer surface of the heat insulation pad 5 to form a low-bearing-load equipment interface in a combined manner, as shown in fig. 6(a) -6 (c), 7(a) -7 (c), 8(a) -8 (c) and 9(a) -9 (c);
for a common structural interface, a round gasket 7 and a heat insulation pad 5 are adhered to the upper part and the lower part of the edge of a wing plate of the three-dimensional modular supporting plate 1, as shown in figure 12; through the difference of the local implementation strengthening modes, various interfaces with different bearing requirements can be flexibly supported in an individualized way, and the optimal configuration of resources is realized. As a three-dimensional modular structure which has comprehensive functions, large body shape and completely covers the upper surface of the whole satellite, a lifting appliance penetrates through the side surface of the three-dimensional modular structure, and in order to avoid the fragile composite material three-dimensional modular support plate 1 from being damaged by a large metal lifting appliance, a plurality of isolation pads 9 are adhered to a side web plate of the three-dimensional modular support plate 1, so that the material surface of the three-dimensional modular support plate 1 can be effectively protected, as shown in fig. 10 and 11.
The accuracy requirements of each interface are as follows: no matter the interface is camera interface, 12 interfaces of range finder, various equipment interfaces such as top, still load cabin 13's structure interface, each group of interface all need form coplane respectively, and processing threaded connection hole, each group of interface forms the single-point coplane interface of large-span respectively, in order to avoid the problem that the combined material punches and easily produces the layering, paste various gaskets in the interface position, simultaneously, when pterygoid lamina or web take place to warp a little or the skew after the three-dimensional modular backup pad of large-scale combined material 1 shaping, the use of trimming gasket 8 can also compensate the problem that three-dimensional modular backup pad 1 leads to leading to unable the leveling, as shown in fig. 3 ~ 9, 12, the load equipment interface plane degree of processing back ganged can reach 0.1mm, the plane degree of all structure interfaces can reach 0.15mm, the position degree is not more than phi 0.2 mm.
The rubber screw connection design: all parts binding surfaces are coated with glue on two sides, large threaded connection or increased screw connection among related metal parts is designed, the front side of the tool is pressurized in the forming process, the gluing quality is ensured, the welding shearing strength is detected along with a furnace part, the gluing forming quality is verified, and the implementation of threads can ensure that the gluing surfaces have strong anti-stripping capability.
The three-dimensional modular structure 14 is characterized in that a main body structure, namely the three-dimensional modular support plate 1, is designed into an integral structure with excellent rigidity, the three-dimensional modular structure 14 can be detached from the load cabin 13, the upper surface and the lower surface of the three-dimensional modular structure 14 which is placed beside are respectively or simultaneously provided with the first camera 10, the second camera 11, the distance measuring instrument 12, various instruments, cables and other equipment which are associated with three large-scale equipment while other various equipment is arranged in the load cabin 13, and the assembled combination can be integrally transferred to the load cabin 13 to finish three main loads at one time, so that the whole satellite development cycle is saved.
The three-dimensional modular supporting plate 1 is matched with the angle box 2 and the metal angle seat 3 for use, according to a simulation analysis result, the combination of the angle box 2 and the metal angle seat 3 is arranged at the mounting interface of a large device, the metal angle seat 3 is arranged at a medium bearing area, and the round gasket 7 is only arranged at a small bearing interface.
In the whole satellite assembly process, the three-dimensional modular structure can be disassembled from the top end of the load cabin and independently exists outside the satellite body, equipment installation is carried out, the three-dimensional modular structure is good in openness, two cameras can be separately installed in two areas of the upper surface at the same time, a distance measuring instrument and a gyroscope are installed on the lower surface, equipment such as ground sensitivity and the like are installed on the side surface, the load cabin can be parallelly assembled with other equipment, modular assembly can be completed after the equipment assembly on the three-dimensional modular structure is accurately adjusted, the upper end face of the load cabin can be integrally hung, the assembly mode improves assembly efficiency, and a very beneficial engineering implementation effect is achieved.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (10)
1. A three-dimensional modular structure for supporting multiple loads is characterized by comprising a three-dimensional modular supporting plate (1), a structure interface and a load equipment interface;
the three-dimensional module type supporting plate (1) is of a criss-cross sash structure, and each frame of the sash is provided with an I-shaped beam in section; the three-dimensional modular support plate (1) takes a rectangular equal-height frame on the lower surface as a base surface, and the upper surface is provided with local convex structures with different heights for mounting a first camera (10) and a second camera (11), so that the first camera (10) and the second camera (11) and a lower load cabin (13) present different angles; the three-dimensional modular supporting plate (1) is provided with a plurality of structural interfaces and load equipment interfaces except for a camera interface along the transverse direction and the longitudinal direction.
2. A modular construction, according to claim 1, characterised in that the projecting structure comprises a camera mounting surface (15), supported below the camera mounting surface (15) by a cross rib (16) formed by the web of an i-beam, and in that the outer plates surround the cross rib (16) to form a trapezium-shaped quadrangular frustum of a pyramid.
3. The stereoscopic modular structure for supporting multiple loads according to claim 1 or 2, characterized in that the load equipment interface comprises a corner box (2), a metal support (3), an interface part (4), a heat insulation mat (5), a trimming gasket (8); the camera mounting structure comprises an angle box (2) which is arranged below a camera mounting surface (15) of a three-dimensional modular support plate (1) and above a distance meter (12) mounting position in the middle of the three-dimensional modular support plate (1), a metal support (3) is mounted in the angle box (2), a matching port part (4) is mounted in the metal support (3), a heat insulation pad (5) is pasted on the surface of the interface part (4), an aluminum alloy trimming gasket (8) is pasted on the surface of the heat insulation pad (5), and a group of load equipment interfaces are formed; the three-dimensional modular support plate is characterized in that a metal support (3) is directly lined on the three-dimensional modular support plate (1), a heat insulation pad (5) is pasted on the outer surface of the metal support (3) or the outer surface of a wing plate of the three-dimensional modular support plate (1), and a trimming gasket (8) is pasted on the surface of the heat insulation pad (5) to form another group of load equipment interfaces.
4. The modular structure for supporting multiple loads according to claim 3, wherein the structural interface comprises a plurality of round washers (7) and a plurality of heat insulation pads (5), the plurality of round washers (7) are adhered to the lower end surface of the modular support plate (1) along the transverse direction and the longitudinal direction, and the structural interface is formed by adhering the heat insulation pads (5) to the surfaces of the round washers (7).
5. The three-dimensional modular structure for supporting multiple loads according to claim 4, further comprising long gaskets (6), wherein 1 or 2 long gaskets (6) are respectively adhered to the inner surface of the corner box (2) and the outer surface of the web of the three-dimensional modular support plate (1) after the corner box (2) is attached to the web of the three-dimensional modular support plate (1), 4 parts inside and outside each long gasket (6) are strung together through two screws and are fastened by the screws, the number of the long gaskets (6) in each corner box (2) is not less than 2, not more than 4, and the long gaskets (6) are symmetrically used on the inner surface and the outer surface.
6. The three-dimensional modular structure for supporting multiple loads according to claim 5, further comprising isolation pads (9), wherein the isolation pads (9) for avoiding the lifting tool are adhered to the outer side surfaces of the I-beam webs at the lower end of the outermost side of the three-dimensional modular support plate (1), the number of the isolation pads (9) adhered to the outer surface of each outer web is 2-3, and the isolation pads are uniformly distributed at equal intervals.
7. The modular structure for supporting multiple loads according to claim 2, wherein the modular support plate (1) is provided with a first convex structure (1-1), a second convex structure (1-2), a third convex structure (1-3) and a fourth convex structure (1-4); the first protruding structure (1-1) and the second protruding structure (1-2) are positioned at one side of the three-dimensional modular supporting plate (1), and the third protruding structure (1-3) and the fourth protruding structure (1-4) are positioned at the other side of the three-dimensional modular supporting plate (1); the first protruding structure (1-1) and the third protruding structure (1-3) are used for installing a first camera 10, the width of a camera installation surface (15) of the first protruding structure (1-1) and the width of a camera installation surface (15) of the third protruding structure (1-3) are the same, and the first protruding structure (1-1) is higher than the third protruding structure (1-3); the second convex structures (1-2) and the fourth convex structures (1-4) are used for installing the second camera 11, the widths of the camera installation surfaces (15) of the second convex structures (1-2) and the fourth convex structures (1-4) are the same, and the fourth convex structures (1-4) are higher than the second convex structures (1-2).
8. A multi-load supporting three-dimensional modular structure according to claim 3, characterised in that the material of the three-dimensional modular support plate (1) is an all carbon fibre resin-based composite material.
9. A multi-load supporting modular construction according to claim 8, characterised in that the corner box parts (2) are made of all carbon fibre resin based composite material.
10. Three-dimensional modular structure for supporting multiple loads according to claim 9, characterised in that the material of the metal support (3) and of the interface element (4) is titanium alloy.
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Cited By (1)
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| CN112455721A (en) * | 2020-11-11 | 2021-03-09 | 北京空间飞行器总体设计部 | Large-bearing modular service cabin structure |
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| CN111891386B (en) | 2022-04-08 |
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