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503 results about "Cable net" patented technology

Cable net reflecting surface antenna surface accuracy and tension state simultaneous design method

The invention relates to a cable net reflecting surface antenna surface accuracy and tension state simultaneous design method which is characterized by at least including the steps of firstly, determining an initial balance reference configuration, namely the configuration when k=0, marking the corresponding node position as X<(0)>, and marking a cable section lofting length as L0<(0)>; secondly, determining the node displacement Us<(k)> required by the cable net during the kth iteration; thirdly, on the basis of the kth balance, determining the sensitivity matrix T / L0 of the cable section tension to the cable length and the sensitivity matrix X / L0 of the node position to the cable length during the kth iteration; fourthly, using a optimization model to solve the kth cable length correction amount; fifthly, correcting the cable section lofting length to be L0<(k+1)>=L0<(0)>+delta L0<(k)> after the kth iteration; sixthly repeating the process until the given convergence condition is satisfied. By the method, cable net tension is allowed to be even while the antenna surface accuracy is guaranteed.
Owner:XIDIAN UNIV

Initial form design method of deployable offset parabolic antenna cable net structure

The invention discloses an initial form design method of a deployable offset parabolic antenna cable set structure. In the method, the cable net structure initial form design includes front cable net design and rear cable net design. During the front cable net design, coordinates of front cable net nodes and cable force act together as design variables, and tensions of all internal cable sections of the front cable net are equal and the ratio of the maximum tension of the boundary cable to the maximum tension of the internal cable section is minimum on conditions that all boundary nodes are fixed and all the internal nodes are on the ideal paraboloid, in force-balance states and capable of covering effective optical aperture completely. During the rear cable net design, the minimization of the ratio of the tension level of the rear cable net to that of the front cable net is achieved on the condition that an adjusting cable keeps vertical and the relation among the total height of the antenna, the height of the front cable net and the minimum length of the adjusting cable is met. Therefore, node coordinates and cable force of the front cable net and the rear cable net are acquired to complete the initial form design.
Owner:XIDIAN UNIV

Oil-well realtime monitoring system and its controlling method

InactiveCN1854460AImprove securityReal-time monitoring of oil productionSurveyMeasurement devices for drillingMicrocontrollerControl system
This is a real time monitor system in oil field and its control method. The monitor system includes sensors posited in oil field, SCM near the field and a real time remote inspection and control system via telecommunication. Oil output is monitored by sensors then transmitted to SCM via cable nets. The data from SCM then is transmitted to moving base via GPRS then to internet and finally received by inspection and control system.
Owner:延安国能科技股份有限公司

Special beam application-oriented scissors-type curved-surface reusable mesh type deployable antenna

The invention discloses a special beam application-oriented scissors-type curved-surface reusable mesh type deployable antenna which comprises a scissors-type truss structure, inner cable nets, outer cable nets, vertical cables and wire meshes, wherein the inner cable nets and the outer cable nets are connected with the scissors-type truss structure; the inner cable nets are located in a space formed by the scissors-type truss structure; the outer cable nets are respectively located on the upper end surface and the lower end surface of the space formed by the scissors-type truss structure; the vertical cables are connected with the inner cable nets and the outer cable nets; the wire meshes are attached to the inner sides of the inner cable nets; the inner cable nets and the wire meshes form a reflection surface of a whole antenna system; and application of special beams such as shaped beams is realized by changing the shapes of the inner cable nets. The special beam application-oriented scissors-type curved-surface reusable mesh type deployable antenna solves the problems that the existing mesh type deployable antenna has a single function and the application of the special beams such as the shaped beams cannot be realized by changing the shape of the reflection surface, has the advantages of small folded size, simple structure and diversified function, and can be applied to the design of a space-borne antenna required by the special beams such as the shaped beams.
Owner:XIDIAN UNIV

Self-slippage mining method of gentle dip ore body

The invention discloses a self-slippage mining method of a gentle dip ore body. The method comprises the steps of ore body dividing-accurate mining-cutting slot constructing-cutting slot supporting-bottom removing-brushing and recovering-mine discharging-filling, etc. according to the method, only the cutting slot is supported by an anchor cable net, so that the mining cost can be greatly reduced; the cutting slot is supported by the anchor cable net, and an anchor cable is connected by a flexible steel belt, so that a top plate is a suspended whole body, the stability can be improved, and the safe recovery can be realized; ore bodies at two sides of the cutting slot are exploded in a brushing way, so that compared with the existing single-side retroactive mining method, the method shortens the recovery time by a half, the efficiency can be greatly improved, the stope exposure time can be reduced, and the safety can be improved; according to the bottom removing construction, the self-slippage degree of the ore can be enlarged, and the recovery efficiency can be improved.
Owner:贵州开磷设计研究院有限责任公司

Isogeometric form-finding method for space truss cable-net antenna

The invention discloses an isogeometric form-finding method for a space truss cable-net antenna. The method is capable of performing form finding on the truss cable-net antenna simply and effectively while improving accuracy. The method comprises the steps of obtaining a support truss and current node coordinates of a cable net based on a topological relation of the antenna according to set design parameters of the antenna; according to a set tension value of a cable section and the current node coordinates of the cable net, calculating an initial length of the cable section, obtaining a current force density coefficient of the cable section, and performing form-finding analysis on the cable net by adopting an asymptotic iterative force density method based on the initial force density coefficient of the cable section on the basis of not considering truss deformation; performing static balance iteration on finite element models of the truss and the cable net; and judging whether the antenna satisfies a static balance error or not, thereby finishing form finding of the truss cable net.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY

Electromechanical-integration-based shaped beam design method for satellite-borne mesh antenna

InactiveCN104794262AImproves tension uniformityRealize electromechanical integration designSpecial data processing applicationsElectricityShaped beam
The invention discloses an electromechanical-integration-based shaped beam design method for a satellite-borne mesh antenna. In the method, firstly, an electromechanical-integration-based shaped design optimization model for the mesh antenna is built, the force density of a cable net serves as the design variable of the optimization model directly, and under the condition that the cable net is in a tensioned and balanced state without loose cables, the method aims to achieve the targets of enabling the electrical performance of a far field to meet the shaping requirement as far as possible and making the tension of the cable net uniform as far as possible; then, iterative solving is performed on the optimization model till the optimal comprehensive target of the electrical performance and the tension uniformity is achieved, and shaped beam design of the mesh antenna is completed.
Owner:XIDIAN UNIV

Plane turnover multi-point leveling device and method

The invention discloses a plane turnover multi-point leveling device and method. The plane turnover multi-point leveling device comprises first to twelfth hydraulic supporting legs, first to twelfth displacement sensors, first to twelfth supporting leg force cells, first to fifth horizontal tilt angle sensors, a hydraulic control valve bank, an electrical control display box, a leveling controller, a hydraulic pipeline, a cable network and a platform. The first to twelfth supporting leg force cells and the first to twelfth displacement sensors are sequentially installed at the movable ends of the fifth to twelfth hydraulic supporting legs respectively. The movable ends of the first to twelfth hydraulic supporting legs are respectively fixed to the lower surface of the platform. According to the plane turnover multi-point leveling device and method, a mechanism can be precisely and efficiently leveled on the premise that the leveling device is safe inherently.
Owner:BEIJING INST OF SPACE LAUNCH TECH +1

Satellite-borne deployable mesh antenna

The invention discloses a satellite-borne deployable mesh antenna. The satellite-borne deployable mesh antenna comprises an antenna reflecting surface extending arm (1), an antenna reflecting surfacedeployable supporting assembly (2) and a cable net structure (3). The antenna reflecting surface extending arm adopts a carbon fiber composite material hollow round rod design, so that the weight of the extending arm and the in-orbit thermal deformation of the extending arm are reduced, and the antenna pointing accuracy is ensured. The antenna reflecting surface deployable supporting assembly (2)is composed of module units, can be increased or decreased according to the aperture requirement of the antenna reflecting surface, and is high in expandability. The cable net structure is designed ina multi-layer cable net mode, ground adjustment of the profile precision of the reflecting surface is achieved, and the requirement of microwave antenna detection for the profile precision of the reflecting surface is met. According to the invention, factors such as antenna emission folding and in-orbit unfolding, antenna reflecting surface function and performance testing and antenna reflectingsurface profile precision adjusting are comprehensively considered for design, and the requirement of satellite in-orbit ground detection can be met.
Owner:SHANGHAI SATELLITE ENG INST

Secondary cable net cable dome structure

The invention discloses a secondary cable net cable dome structure, which consists of a ridge cable, a broken line stay cable, an upper ring cable, a lower ring cable, an annular middle pressure lever, a radial middle pressure lever, a corner pressure lever and a secondary cable net. The secondary cable net cable dome structure can support a rigid roof, is a novel full-tension structure similar to a cable dome, and belongs to the field of spatial structures of civil engineering buildings. The secondary cable net is formed by orthogonal radial secondary cable and annular secondary cable planes, big grids of the upper part of a main structure consisting of the ridge cable and the upper ring cable are divided into small grids, and nodes of the secondary cable net are directly used as fulcrums of the rigid roof. The secondary cable net is supported on the surrounding ridge cable and the upper ring cable, and the supporting rigidity of the ridge cable and the upper ring cable is reinforced through the annular middle pressure lever and the radial middle pressure lever. Through the secondary cable net cable dome structure, the design idea of the full-tension structure is kept, the advantages of a cable dome structure are succeeded, the integral stability is better, and the selective range of the roof material is wider; and the structure can be popularized and applied.
Owner:SOUTHEAST UNIV

Slope anti-rockfall guard net and construction method thereof

A slope anti-rockfall guard net comprises cable anchor poles (1), cable nets (4) and steel wire meshes (5); the cable anchor pole (1) is a steel rod, and buried in a slope protection area; the steel wire mesh (5) is paved on a protection grid cell, close to a slope surface, and binding wires can tie and fix the steel wire mesh with vertical support ropes (2) and transverse support ropes (3); the cable net (4) is paved on the top surface of the steel wire mesh(5), and stitching ropes can stitch the cable net with vertical support ropes (2) and transverse support ropes (3). The slope anti-rockfall guard net and a construction method thereof are reasonable in guide net preparation step design, simple in operation, and the prepared guide net is strong and durable, obvious in effect, can intercept road slope rockfall, thus reducing rockfall damages in the road usage process.
Owner:MCC5 GROUP CORP SHANGHAI

Loose cable net form-finding method based on catenary element

InactiveCN104504284AImplementing form-finding analysisSpecial data processing applicationsCable netEngineering
The invention provides a loose cable net form-finding method based on a catenary element. The loose cable net form-finding method mainly includes the steps: selecting material parameters D, geometrical parameters S, topological structures and boundary node positions Pfix of a cable net; setting an initial position Pfree of a middle free node of the cable net; building a catenary loose cable net model under the action of gravity; calculating cable segment forms and node force in a cable net system; analyzing resultant force of nodes of the cable net; judging whether resultant force of an optional node meets requirements or not, and outputting results if the resultant force meets the requirements; continuing to set the initial position Pfree of the middle free node of the cable net if not; finally, outputting the balance position of the middle free node of the cable net. Form-finding analysis for the loose cable net is realized by a nonlinear finite element method, the results are matched with a force density method, stiffness information of the loose cable net in any configuration is acquired, dynamic performances of the loose cable net can be further analyzed, or the loose cable net is combined with other finite elements (such as rods, beams, plates and shells) to realize modeling, and kinetic analysis of complicated structures is performed.
Owner:XIDIAN UNIV

Static shaping film reflector antenna based on scissor-type truss structure

The present invention discloses a static shaping film reflector antenna based on a scissor-type truss structure. The static shaping film reflector antenna is composed of a scissor-type truss structure, a flexible cable, a basic cable net electrode, a thin film reflector and a static power supply. The scissor-type truss structure is configured to provide support for the whole structure, flexible cables are staggeringly arranged at the inner side of the scissor-type truss structure, the basic cable net electrode is connected with the scissor-type truss structure through the flexible cables, the thin film reflector is fixed on the basic cable net electrode and is connected and fixed with the scissor-type truss structure, and the static power supply is configured to provide high potential for the basic cable net electrode so as to provide grounding low potential for the thin film reflector. At folding, the flexible cables, the basic cable net electrode and the thin film reflector are folded in the free space of the scissor-type truss structure; and at unfolding, the flexible cables are tightened and are configured to support the basic cable net electrode, the thin film reflector forms the paraboloid shape under the action of the electrostatic force outputted by the static power supply. The static shaping film reflector antenna based on the scissor-type truss structure is small in the folding size and simple in structure, and can be used in the high-precision static shaping film reflector antenna.
Owner:XIDIAN UNIV

Cable network running integrated management system and intelligent control platform

ActiveCN102681518ACollect status parameters in real timeReal-time display of temperature distributionTotal factory controlProgramme total factory controlResource consumptionCable net
The invention relates to the technical field of a cable network running integrated management system and an intelligent control platform, in particular to a software intelligent control platform which can collect all status parameters in online running of a cable and is used for arranging and classifying the data to be stored, automatically analyzing the data variation and for issuing an alarm and controlling remote equipment in real time. The software intelligent control platform has a hardware environment and a software environment, a stable and reliable running, maintenance and management system is established, and reliable guarantee is provided for normal running and expansion of each application. Due to the adoption of the system, the key information needed by the analysis and decision can be timely, quickly, simply and conveniently acquired, so that the time for the analysis and the decision can be reduced, the consumption of the human resource can be reduced, and the high-efficient and low-cost electric network management can be realized. The potential danger of the cable equipment can be discovered in time, the electric power accident can be prevented, and the economic loss can be remarkably reduced.
Owner:SHENYANG POWER SUPPLY LIAONING POWER +1

Augmented reality-based satellite cable laying guidance system and method

The invention discloses an augmented reality-based satellite cable laying guidance system. The system comprises a guidance information generation module, an image collection module, a cable identification module, a capsule plate locating module, a guidance information visualization module and a guidance state control module. An operator is guided to quickly realize satellite cable assembly in an augmented reality mode. In addition, the invention discloses an augmented reality-based satellite cable laying guidance method. The cable laying efficiency and the convenience of cable net informationquery in a complex satellite assembly scene are improved; the cable laying error generation efficiency is reduced; and the predefinition process of guidance process information is simplified.
Owner:BEIJING INST OF SPACECRAFT ENVIRONMENT ENG

Spoke type single and double layer mixed cable net structure

The invention discloses a spoke type single and double layer mixed cable net structure. The spoke type single and double layer mixed cable net structure comprises a spoke type single-layer cable net,a spoke type double-layer cable net and a compressive outer ring truss; the spoke type single-layer cable net comprises a single-layer cable net annular cable and single-layer cable net radial cables,one ends of the single-layer cable net radial cables are connected with the single-layer cable net annular cable, and the other ends of the single-layer cable net radial cables are connected with thecompressive outer ring truss; the spoke type double-layer cable net comprises double-layer cable net upper annular cables, double-layer cable net lower annular cable, double-layer cable net upper radial cables, double-layer cable net lower radial cables and strut assemblies arranged between the upper annular cables, the lower annular cables and the radial cables; and one ends of the double-layercable net upper radial cables and the double-layer cable net lower radial cables are connected with the double-layer cable net upper annular cables and double-layer cable net lower annular cable correspondingly, and the other ends of the double-layer cable net upper radial cables and the double-layer cable net lower radial cables are anchored to the compressive outer ring truss. The single and double layer mixed cable net structure is formed by combining the single-layer cable net and the double-layer cable net, achieves the asymmetric architectural appearance, has the characteristics of simple structure and see-through beautiful appearance of the single-layer cable net, and meanwhile has the advantage of high bearing capacity of the double-layer cable net.
Owner:CHINA SOUTHWEST ARCHITECTURAL DESIGN & RES INST CORP LTD

Topological structure design method for foldable paraboloid antenna cable net surface based on electrical performance optimization

The invention discloses a topological structure design method for a foldable paraboloid antenna cable net surface based on electrical performance optimization, and the foldable paraboloid antenna cable net surface consists of a front cable net surface and a rear cable net surface. The design of the front cable net surface comprises the steps: taking internal nodes of the front cable net surface as design variables, taking boundary node fixing as the boundary condition, obtaining all node coordinates of the front cable net surface under the conditions that all internal nodes are not limited by an ideal paraboloid and the internal nodes are in the state of force balance, carrying out the axial translation optimization of all node coordinates based on the antenna gain electrical performances, and achieving the minimization of an illumination weighted profile error of a front cable net surface. The design of the rear cable net surface comprises the steps: employing the same design method as the front cable net surface under the condition that the total height of a foldable paraboloid antenna is met, and obtaining the structure of the rear cable net surface. The method achieves the excellent structural layout of the foldable paraboloid antenna cable net surface, can remarkably improve the profile precision, stability and electrical performance of the foldable paraboloid antenna.
Owner:XIDIAN UNIV

Automatic rope-collecting-type net surface management hasp device

The invention relates to an automatic rope-collecting-type net surface management hasp device, and belongs to the technical field of satellite antenna structures. The automatic rope-collecting-type net surface management hasp device is mainly used for resolving the problem of hooking and winding of an annular net-shaped deployable antenna net surface system, and comprises a rope-winding wheel, an outer end rotary-type volute spiral spring, a connection shaft, an end cap, a bearing, a shaft sleeve, an upper covering plate, a lower covering plate and a cable net connecting ring, and peripheral equipment comprises a tension array and a rear tension cable net. The automatic rope-collecting-type net surface management hasp device guarantees orderly unfolding of a net surface when an antenna reflector is unfolded, and the whole operation process is simple. Meanwhile, by combing the forming characteristics of a cable net, net surface management and a cable net forming function are integrally designed. The automatic rope-collecting-type net surface management hasp device can be applied to unfolding tests of various annular deployable antennas, and has broad application prospects.
Owner:XIAN INSTITUE OF SPACE RADIO TECH

Large-span upper layer connection square-shaped and inner ring saddle-shaped double-layer cable strut tension structure

The invention discloses a large-span upper layer connection square-shaped and inner ring saddle-shaped double-layer cable strut tension structure, and relates to the field of novel light-weight large-span building structures. The large-span upper layer connection square-shaped and inner ring saddle-shaped double-layer cable strut tension structure comprises upper layer connection square-shaped cable nets, inner ring saddle-shaped cable trusses, lower chord radial cables and an external compression ring; the upper layer connection square-shaped cable nets are connected with the inner ring saddle-shaped cable trusses and the external compression ring; the upper layer connection square cable nets comprise clockwise inhaul cables, counterclockwise inhaul cables and cable clamp joints; the clockwise inhaul cables are all positioned above or below the counterclockwise inhaul cables and are connected with the counterclockwise inhaul cables through the cable clamp joints; radial inhaul cablesin the lower chord radial cables are radially arranged; and the radial inhaul cables are connected with the inner ring saddle-shaped cable trusses through lower chord radial cable inner ring joints and are connected with the external compression ring through lower chord radial cable outer ring joints. The large-span upper layer connection square-shaped and inner ring saddle-shaped double-layer cable strut tension structure has large overall rigidity and can better resist wind loads; and in particular, the torsional rigidity is large, and the defect of insufficient torsional resistance of a traditional structure can be obviously overcome.
Owner:SHANGHAI JIAO TONG UNIV

Large-span membrane structure roof

The invention discloses a large-span membrane structure roof. The large-span membrane structure roof comprises air membranes and a fixing device, wherein the air membranes are connected to the top of a building, and the air membranes and the building form a closed space; the fixing device is arranged at the top of the building and used for fixing the bottoms of the edges of the air membranes to the building. The air membranes are connected to the building, and by the adoption of a membrane structure, the roof is suitable for a large-span building; the roof is low in weight, simple in structure, good in heat insulation effect, easy and convenient to construct, short in construction period, free of pollutant emission in the construction process and environmentally friendly; the space between the middle membrane and the inner membrane is filled with air, an inflated air bag is formed, and the sealed air which does not flow is used for insulating heat according to the principle similar to vacuum glass, so that the heat insulation effect of the space in the building is good, and all the air membranes will not get loose; a heat insulating layer is arranged, so that the heat insulation effect of the space in the building is enhanced; a steel cable net is arranged, so that the air membranes have strong compression resistance and tear resistance in a tensioning state.
Owner:SHENZHEN ZHONGDE MEMBRANE STRUCTURE CO LTD

Three dimensional anchor cable bolting technology in heading

A coal bed alley way three dimensional anchor cable net support technology is best adapted for supporting the thick rock layer with soft top board in mine. When adopting the anchor cable to fix the top board rock layer, the anchor rods at two ends of the same top board are connected to two adjacent anchor cable in level plane cross direction to integrate all supports in order to form a strict 'support net'. The anchor cable can reinforce the top board rack layer in vertical direction, and can be connected to two anchor rods and the front and rear adjacent anchor cables in level direction. The alley way top board rock layer can bear a three dimensional restraining force, so the top board rock layer is prevented from being damaged earlier, the reliability and safety of the support whole body are increased, the difficult problem the bottom construction top board risk when exploiting thick and very thick soft coal layer in mine is solved. The construction technics is simple, convenient in locale operation and has broad practicability.
Owner:CHINA UNIV OF MINING & TECH

Reticular deployable antenna deploying process cable force analysis method

The invention provides a reticular deployable antenna deploying process cable force analysis method. The reticular deployable antenna deploying process cable force analysis method mainly includes steps: selecting the number and geometric parameters of peripheral truss units of a reticular deployable antenna, a material parameter D of a cable net, a geometric parameter S, a network cable topology structure and the number M of discrete working conditions of a deploying process; calculating a change motion trail of positions of connection points of trusses and the cable net; calculating a stress state of each cable unit under each working condition; fitting a changing curve F(theta) of acting force of the cable net for a boundary connection point along with changes of a spread angle; finally, using changing cable net acting force as a load, substituting the load into a flexible multiple body dynamics model, and performing dynamics analysis. The reticular deployable antenna deploying process cable force analysis method regards the deploying process of the reticular deployable antenna as a series of discrete loaded mechanism balance forms, studies strain distribution of each balance form, accurately obtains a cable force changing curve of the deploying process, and provides effective support for ground engineering to achieve influence mechanism analysis of cable net tension for the deploying process based on flexible multiple body system dynamics modeling and analysis.
Owner:XIDIAN UNIV

Construction technology of cable net dot-mode glass curtain wall

The invention discloses a construction technology of a cable net dot-mode glass curtain wall and relates to the technical field of building decoration, in particular to the technical field of construction of glass curtain walls. According to the construction technology of the cable net dot-mode glass curtain wall, a supporting structure which is composed of a roof beam, a floor beam, a ground anchor, a horizontal foundation beam and the like serves as basic supporting, and a glass panel is fixed through a cable truss which is pulled upward on the glass panel. Therefore, the construction technology of the cable net dot-mode glass curtain wall can shorten the construction period of an overall building, lightens load of the building, is remarkable in advantage and beneficial to natural lighting, can save electricity resources and improves the durability and the safety of the glass curtain wall.
Owner:华新建工集团有限公司

Satellite-borne netted deployable antenna structure optimizing method in consideration of on-orbit thermal environment

The invention discloses a satellite-borne netted deployable antenna structure optimizing method in consideration of an on-orbit thermal environment. The method comprises the following steps: firstly, giving an initial point, a convergence precision and a cable net strain lower limit; secondarily, determining the gradient vector of cable strain with respect to the design variable, the gradient vector of the stress with respect to the design variable, the gradient vector of the precision with respect to the design variable and the gradient vector of the target function with respect to the design variable at the R-th iteration; and then solving an optimization model to obtain the R-th design variable correction value; performing the design variable correction after the R-the iteration again; repeating the process till to obtain the optimal solution. Through the adoption of the method disclosed by the invention, the necessary requirement while designing the antenna can be satisfied, and the design effect can be optimized; under the condition of improving the precision of a reflecting surface and lightening the structure weight, the method can effectively guarantee that the tension force at the cable section cannot occur relaxation; the computing efficiency of designing the antenna structure can be obviously improved while guaranteeing the computing precision, and the computing quantity of designing the structure can be obviously reduced.
Owner:XIDIAN UNIV

Construction method of thin shell with thin-shell structure

The invention discloses a construction method of a thin shell with a thin-shell structure and relates to a reinforced concrete construction method of a thin shell with a thin-shell structure. Aiming to reduce the workload of producing, mounting and stripping a framework, the construction method comprises the following construction steps of: (1) hanging and paving a combined body of a concrete gridded attached carrier for deposing and pouring and reinforcing ribs on a prestress cable net, binding the attached carrier, the reinforcing ribs and the cable net by using the reinforcing ribs with a concrete bearing structure; and carrying out spraying and concreting to generate a form shell of the formwork for pouring concrete; and (2) carrying out spraying concreting on the generated form shell to finish the construction of the thin shell with the thin shell structure. The construction method is simple, can save a large amount of labor force and physical resources and has favorable comprehensive technical and economic performances.
Owner:CHINA CHEM ENG SECOND CONSTR

Installation method for steel reticulated shell and cable dome combined structure

Disclosed is an installation method for a steel reticulated shell and cable dome combined structure. Hinged supports capable of rotating unidirectionally are arranged on outer ring beams, an installation support is arranged in the middle of a site, and part of rods of a steel reticulated shell are installed; a multipoint synchronous lifting device is arranged on the upper portion of the steel reticulated shell; an inner ring cable system of a dorsal cable net is connected with supporting rods, and an outer ring cable system is connected with the supports on the outer ring beams through auxiliary pulling cables; the lifting device on the upper portion of the steel reticulated shell lifts the supporting rods evenly, outer ring dorsal cables are pulled in the lifting process, the whole dorsal cable net keeping a loose state is lifted synchronously, ring cables and inclined cables at different installation heights are installed during the lifting, and after all inhaul cables are installed, the inclined cables of the outer rings can be pulled to be shaped; and remaining rods of the steel reticulated shell are mounted, and the reticulated shell is connected with a cable dome into a whole. According to the installation method for the steel reticulated shell and cable dome combined structure, difficulties of cable dome structure installation can be reduced effectively, and simultaneously, cross operation of steel reticulated shell and cable dome installation can be achieved, the construction period is reduced, and the cost is saved.
Owner:HUAIHAI INST OF TECH

Automatic-resilient, multi-dimensional reconfigurable and high-parameter satellite-borne expandable antenna

ActiveCN107248620AIncreased bending stiffnessRealize multi-dimensional reconfigurable functionsCollapsable antennas meansCable netIntegrated antenna
The invention belongs to the technical field of an antenna, and discloses an automatic-resilient, multi-dimensional reconfigurable and high-parameter satellite-borne expandable antenna. The automatic-resilient, multi-dimensional reconfigurable and high-parameter satellite-borne expandable antenna is provided with a central wheel cylinder, an upper variable parabolic radiation rib, a lower variable parabolic radiation rib, a memory adjustment rope, an upper shape memory cable net, a lower shape memory cable net, a force balance system and a metal reflection net, wherein the upper variable parabolic radiation rib, the lower variable parabolic radiation rib and the memory adjustment rope form a parabolic cable net structure on a parabolic substrate, the force balance system, the upper shape memory cable net and a lower shape memory cable net are used for building the antenna in a thermodynamic property controllable mode along a radial direction, and the metal reflection net covers surfaces of the shape memory cable nets. By the antenna, the flexural rigidity of the radiation ribs are improved, the internal force of the whole structure is substantially reduced, and the rigidity demand and the weight of the whole structure can be effectively reduced; and with the adoption of the shape memory cable net structure, automatic monitoring and self-adaptive adjustment of a shape memory pull rope can be achieved, the multi-dimensional reconfigurable function of the integrated antenna is achieved by synchronous control of a multi-degree of freedom variable radiation rib, and the surface accuracy and the on-orbit stability of a parabolic cable net cable can be further improved.
Owner:石家庄凯杰电子科技有限公司

Satellite-borne cable-net-foldable antenna profile accuracy measurement method

The invention discloses a satellite-borne cable-net-foldable antenna profile accuracy measurement method. The method specifically includes the following steps of preparation work conducted before antenna measurement, picture taking, measuring point coordinate calculation achieved by leading in a measurement device, coordinate conversion, surface fitting, and antenna profile accuracy calculation. The method is high in measuring efficiency and speed, and one-time measurement time of a cable net type foldable antenna is about one hour; devices are convenient to use and easy to disassemble and assemble, and less time is spent on the early-stage preparation work; non-contact type measurement is conducted, and no direct contact with the reflection face of the antenna is needed in the measurement process; the measurement stability is high. The method is not prone to interference of environment factors; the measurement accuracy is high, the maximum measurement error is 0.2 mm, and the measurement requirement of the foldable antenna can be completely met; compared with other measurement methods, the measurement cost is low.
Owner:XIDIAN UNIV

Coordinate positioning method based three-dimensional cable network design method

InactiveCN106777639ARealize 3D independent modelingImprove 3D design efficiencyGeometric CADSpecial data processing applicationsSystems designCable net
The invention provides a coordinate positioning method based three-dimensional cable network design method. Three-dimensional cable network design is of an important component of design of a mechanical-electrical integration system. Assembly design of an electric connector and wiring design of cables are performed through the coordinate positioning method, the three-dimensional cable network design is enabled to be separated from a system component model and contraction envelope by connecting wiring harness and enveloping wiring harness analog cables, independent modeling of three-dimensional cable network is realized, requirement of the three-dimensional cable network design on computer hardware is reduced, efficiency in three-dimensional cable network design is improved, and maintenance and data stability of the three-dimensional cable network are enhanced.
Owner:SHANGHAI AEROSPACE SYST ENG INST
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