US20190263540A1 - Deployable sheet material systems and methods - Google Patents
Deployable sheet material systems and methods Download PDFInfo
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- US20190263540A1 US20190263540A1 US16/259,679 US201916259679A US2019263540A1 US 20190263540 A1 US20190263540 A1 US 20190263540A1 US 201916259679 A US201916259679 A US 201916259679A US 2019263540 A1 US2019263540 A1 US 2019263540A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
- B64G1/222—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles for deploying structures between a stowed and deployed state
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
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- B64G1/42—Arrangements or adaptations of power supply systems
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Abstract
Exemplary deployable sheet material systems may be configured to stow and deploy sheet material. The systems may include one or more masts, one or more extendable booms, and one or more guys wires configured to function in conjunction with each other to deploy the sheet material and then to maintain the sheet material in the deployed configuration.
Description
- This application claims the benefit of U.S. Provisional Patent Application Ser. No. 62/160,965 filed 13 May 2015, entitled “DEPLOYABLE TENSIONED SYSTEM,” which is incorporated herein by reference in its entirety.
- This invention was made with Government support under contract NNX14CL64P awarded by NASA. The Government has certain rights in the invention.
- The present disclosure relates generally to exemplary deployable sheet material systems for use in stowing and deploying sheet material such as, e.g., solar arrays to provide solar power to spacecraft, solar sails to provide propulsion to spacecraft, drag apparatus to de-orbit spacecraft, etc. The exemplary deployable sheet material systems may be further used with non-spacecraft systems and apparatus. For example, the exemplary deployable sheet material systems may be used with, or in conjunction with, terrestrial apparatus and systems for stowing and deploying sheet material (e.g., solar arrays, polyimide films, etc.) for use with military and research outposts, rapid disaster relief, and/or outdoor recreation.
- An exemplary spacecraft system for deploying sheet material described herein may include a primary beam member extending from a first end region to a second end region, a first mast coupled to the primary beam member, and a second mast coupled to the primary beam member opposite the first mast. Each of the first and second masts may extend from a proximal region coupled to the primary beam member to a distal region. The distal region of the first and second masts may be positioned farther from the primary beam member when the system is in a deployed configuration than when the system is in a stowed configuration. The exemplary spacecraft system may also include a spoolable apparatus coupled to the primary beam member. The spoolable apparatus may include a first boom member proximate the first end region of the primary beam member, a second boom member proximate the second end region of the primary beam member, and a sheet material extending from a proximal sheet region to a distal sheet region and located between the first and second boom members. The first boom member, second boom member, and the sheet material may be in a spooled state when the system is in the stowed configuration and the first boom member, second boom member, and the sheet material may be unspooled into an extended state when the system is in the deployed configuration. The exemplary spacecraft system may further include a plurality of guy wires. The plurality of guy wires may include a first guy wire extending from at least the distal region of the first mast to the first boom member, a second guy wire extending from at least the distal region of the first mast to the second boom member, a third guy wire extending from at least the distal region of the second mast to the first boom member, and a fourth guy wire extending from at least the distal region of the second mast to the second boom member.
- In one or more embodiments, each of the first and second boom members may extend from a proximal boom region located proximate the primary beam member to a distal boom region when in the extended state. The first and third guy wires may extend to the distal boom region of the first boom member and the second and fourth guy wires may extend to the distal boom region of the second boom member. In one or more embodiments, the first and second boom members of the spoolable apparatus may be biased to extend along extension axes to deploy the first and second boom members and the sheet material from the spooled state to the extended state. In one or more embodiments, the spoolable apparatus may also include a spoolable apparatus actuator to restrict movement of the first and seconds boom members into the extended state along the extension axes and to release the first and seconds boom members to extend along the extension axes to deploy the first and second boom members and the sheet material from the spooled state to the extended state.
- In one or more embodiments, the first mast may be biased to move relative to the primary beam member to move from the stowed configuration to the deployed configuration. The spacecraft system may also include a mast actuator to restrict movement of the first mast and to release the first mast such that the distal region of the first mast moves from proximate the primary beam member to a distance away from the primary beam member. In one or more embodiments, the sheet material may include one or more photovoltaic arrays. In one or more embodiments, the system may also include one or more tensioners to tension one or more of the plurality of guy wires.
- In one or more embodiments, the first mast may include a first mast portion and a second mast portion. Each of the first and second mast portions may extend from a proximal mast portion region pivotably coupled to the primary beam member to a distal mast portion region. The proximal mast portion region of the first mast portion may be proximate the proximal mast portion region of the second mast portion. The proximal mast portion regions of the first and second mast portions may be located between the distal mast portion region of the first mast portion and the distal mast portion region of the second mast portion when in the stowed configuration. The distal mast portion region of the first mast portion may be proximate the distal mast portion region of the second mast portion when in the deployed configuration.
- Another exemplary system for use in deploying sheet material described herein may include a primary beam member extending from a first end region to a second end region, one or more masts coupled to the primary beam member, a first boom member, and a second boom member. Each of the one or more masts may extend from a proximal region pivotably coupled to the primary beam member to a distal region. The first boom member may extend from a proximal first boom end region coupled to the first end region of the primary beam member to a distal first boom end region located farther away from the primary beam member than the proximal first boom end region. The second boom member may extend from a proximal second boom end region coupled to the second end region of the primary beam member to a distal second boom end region located farther away from the primary beam member than the proximal second boom end region. The exemplary system may also include a sheet material extending from a proximal sheet region proximate to the primary beam member to a distal sheet region located farther away from the primary beam member than the proximal sheet region. The sheet material may be further located between the first and second boom members. The exemplary system may further include one or more guy wires extending from at least the distal region of the one or more masts to the first boom member and the second boom member.
- In one or more embodiments, the one or more masts may include a first mast pivotably coupled to the primary beam member and a second mast pivotably coupled to the primary beam member opposite the first mast. In one or more embodiments, the one or more guy wires may extend to the distal first boom end region of the first boom member and the distal second boom end region of the second boom member. In one or more embodiments, the one or more masts may be biased to move relative to the primary beam member. The system may also include one or more mast actuators to restrict the one or more masts from moving relative to the primary beam member and to release the one or more masts to move such that the distal region of the one or more masts is located farther away from the primary beam member than the proximal region of the one or more masts.
- In one or more embodiments, the sheet material may include one or more photovoltaic arrays. In one or more embodiments, the system may also include one or more tensioners to tension the one or more of guy wires. In one or more embodiments, each of the one or more guy wire may extend from one of the first and second end regions of the primary beam member to one of the first and second boom members through the distal region of one of the one or more masts. In one or more embodiments, each of the one or more guy wires may extend from at least the distal region of the one or more masts to one of the distal first boom end region and the distal second boom end region.
- An exemplary method of deploying sheet material from a spacecraft described herein may include providing a deployable system. The deployable system may include a primary beam member, one or more masts extending from a proximal region pivotably coupled to the primary beam member to a distal region, and a deployable apparatus coupled to the primary beam member and configurable in a stowed configuration and a deployed configuration. The deployable apparatus may include a plurality of boom members, and a sheet material extending between at least two of the plurality of boom members. The plurality of boom member and the sheet material may be located proximate the primary beam member when in the stowed configuration and extend from the primary beam member when in the deployed configuration. The deployable system may also include a plurality of guy wires extending from the distal region of one or more masts to the plurality of boom members. The method may also include moving the one or more masts relative the primary beam member to position the distal region of the one or more masts farther away from the primary beam member than when in the stowed configuration. Further, the method may include extending the plurality of boom members and the sheet material away from the primary beam member to deploy the sheet material.
- In one or more embodiments, the deployable apparatus may be biased to extend into the deployed configuration and the method may also include releasing the deployable apparatus to extend away from the primary beam member. In one or more embodiments, the one or more masts may be biased to move relative the primary beam member to position the distal region of the one or more masts farther away from the primary beam member than when in the stowed configuration and the method may also include releasing the one or more masts to move relative the primary beam member to position the distal region of the one or more masts farther away from the primary beam member than when in the stowed configuration. In one or more embodiments, the method may further include tensioning the plurality of guy wires after the plurality of boom members and the sheet material are extended away from the primary beam member.
- The above summary is not intended to describe each embodiment or every implementation of the present disclosure. A more complete understanding will become apparent and appreciated by referring to the following detailed description and claims taken in conjunction with the accompanying drawings.
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FIG. 1A is a perspective view of a plurality of exemplary deployable sheet material systems coupled to a spacecraft. -
FIG. 1B is a perspective view of another plurality of exemplary deployable sheet material systems coupled to a spacecraft. -
FIG. 1C is a perspective view of yet another plurality of exemplary deployable sheet material systems coupled to a spacecraft. -
FIG. 2 is a perspective view of an exemplary deployable sheet material system in a stowed configuration. -
FIG. 3 is an expanded perspective view of an end portion of the exemplary deployable sheet material system ofFIG. 2 . -
FIG. 4 is a perspective view of the exemplary deployable sheet material system ofFIG. 2 when between the stowed configuration and a deployed configuration. -
FIG. 5 is a perspective view of the exemplary deployable sheet material system ofFIG. 2 when in the deployed configuration. -
FIG. 6 is a perspective view of an exemplary boom member housing and a portion of an exemplary boom of the deployable sheet material system ofFIGS. 2-5 . -
FIG. 7 is a top plan view of the exemplary deployable sheet material system ofFIGS. 2-6 when in the deployed configuration as shown inFIG. 5 . -
FIG. 8 is a perspective view of an exemplary mast of the deployable sheet material system ofFIGS. 2-7 between a stowed configuration and deployed configuration. -
FIG. 9 is a perspective view of the exemplary mast ofFIG. 8 when in the deployed configuration. -
FIG. 10 is a block diagram of an exemplary method of deploying an exemplary deployable sheet material system. - In the following detailed description of illustrative embodiments, reference is made to the accompanying figures of the drawing which form a part hereof, and in which are shown, by way of illustration, specific embodiments which may be practiced. It is to be understood that other embodiments may be utilized and structural changes may be made without departing from (e.g., still falling within) the scope of the disclosure presented hereby.
- Exemplary embodiments shall be described with reference to
FIGS. 1-10 . It will be apparent to one skilled in the art that elements (e.g., apparatus, structures, parts, portions, regions, configurations, functionalities, method steps, materials, etc.) from one embodiment may be used in combination with elements of the other embodiments, and that the possible embodiments of such apparatus and systems using combinations of features set forth herein is not limited to the specific embodiments shown in the figures and/or described herein. Further, it will be recognized that the embodiments described herein may include many elements that are not necessarily shown to scale. Still further, it will be recognized that the size and shape of various elements herein may be modified but still fall within the scope of the present disclosure, although certain one or more shapes and/or sizes, or types of elements, may be advantageous over others. - Systems (e.g., spacecraft, terrestrial, etc.) including exemplary deployable sheet material systems are described herein. The deployable sheet material systems may be used to deploy and stabilize one or more portions of sheet material for use by the spacecraft (e.g., using tension). In one example, the sheet material may include a solar array capable of receiving incident solar radiation, converting the solar radiation into electrical power, and providing the electrical power to the spacecraft. Sheet material such as, e.g., flexible solar arrays, thin polyimide film (e.g. MYLAR or KAPTON blanket), metallic foil, scrim cloth, etc. may not have enough rigidity to maintain a deployment position by itself. Thus, the exemplary deployable sheet material systems may provide apparatus and structure to deploy such sheet material and to maintain such material in the deployed configuration. In at least one embodiment as described herein, the sheet material (e.g., rollable/spoolable solar array) may be deployed in a substantially-planar deployment configuration (e.g., the sheet material may substantially lie in a plane when deployed). To maintain the sheet material in the deployment configuration, the exemplary deployable sheet material systems described herein may place the sheet material under tension to extend the sheet material into, or lying substantial within, a plane.
- Further, it may be described that the exemplary deployable sheet material systems described herein may define a “truss”-based structure to support any resultant loads from the deployed sheet material (e.g., a photovoltaic array). For example, one or more load-bearing members of the exemplary system may form, or define, a “truss”-based structure, and internal loads of such load-bearing members may be substantially in compression or tension, with bending loads within a member that may be marginal.
- One or more deployable sheet material systems described herein may be configurable between a stowed configuration and a deployed configuration. When in the stowed configuration, the sheet material and other structure may be described as being stored into a relatively-compact space (e.g., the sheet material and other structure may “take up” less space than when in the deployed configuration). When in the deployed configuration, the sheet material may be extended to provide a large surface area (e.g., larger than when in the stowed configuration) and may be supported by the “truss”-based structure described herein.
- The exemplary “truss”-based structure of the deployable sheet material systems may be described as helping evenly distribute resultant loads and decreasing the mass typically used (e.g., without using the “truss”-based structure) to support such resultant loads. In other words, the exemplary systems described herein may be able to support the same amount of sheet material as other systems by using structures having less mass than such other systems. Further, the exemplary deployable sheet material systems may also be described as increasing reliability by using the passive deployment of components and by distribution of internal loads.
- Various exemplary deployable
sheet material systems 100 coupled to aspacecraft 11 and configured in a deployed configuration to deploy one or more portions of sheet material 142 (e.g., solar arrays, solar sails, drag structures, etc.) are shown inFIGS. 1A-1C . As shown, the exemplary deployablesheet material systems 100 may be arranged in various configurations which respect to thespacecraft 11. For example, as shown inFIG. 1A , four deployablesheet material systems 100 may be coupled to thespacecraft 11 on opposing sides from one another. As will be described further herein, each of the deployablesheet material systems 100 may be configured in a stowed configuration in close proximity to thespacecraft 11, and then may be configured to extend away from thespacecraft 11 into a deployed configuration to deploy thesheet material 142. Further, for example, as shown inFIG. 1B , multiple deployablesheet material systems 100 are coupled to thespacecraft 11 in series on either side of thespacecraft 11. In this embodiment, each of the deployablesheet material systems 100 may be configured in a stowed configuration in close proximity to thespacecraft 11, may be configured to extend (e.g., “fold out”) from thespacecraft 11, and then may be further configured into a deployed configuration to deploy thesheet material 142. Still further, for example, as shown inFIG. 1C , two deployablesheet material systems 100 are coupled to opposing sides of thespacecraft 11 similar to thesystems 100 ofFIG. 1A . - The
spacecraft 11 may include various spacecraft components and may be many different shapes and sizes. For example, thespacecraft 11 may include one or more spacecraft structures, propulsion systems, communications systems, avionics, thermal control systems, launch vehicle adapters, payloads (telecommunications systems, science instruments, etc.), etc. As shown inFIGS. 1A-1C , the exemplary deployablesheet material systems 100 may be coupled to thespacecraft 11 in a variety of different configurations. For example, the deployablesheet material systems 100 may release (e.g., fold, slide, extend, etc.) outward from thespacecraft 11 before deploying sheet material 142 (e.g., solar arrays, solar sails, etc.) into a deployed configuration. - The deployable
sheet material systems 100 may be configurable between a stowed configuration as shown inFIG. 2 and a deployed configuration as shown inFIG. 5 .FIG. 4 illustrates the deployablesheet material system 100 between the stowed configuration and the deployed configuration. The deployablesheet material system 100 may be configured into the stowed configuration to reduce the size and profile of the deployablesheet material system 100, e.g., during transportation. The deployablesheet material systems 100 may be configured into the deployed configuration to deploy thesheet material 142 of the systems 100 (e.g., extend the surface area of the sheet material 142). In one or more of the embodiments, thesystem 100 may include one or more electro-mechanical actuators (e.g., shape-memory alloy, paraffin, pyro-technic, burn wire, etc.) configured to initiate movement of the deployablesheet material systems 100 from the stowed configuration to the deployed configuration as will be described further herein. - Generally, the exemplary deployable sheet material systems described herein include apparatus configured to stow and deploy one or more portions of the sheet material such as a photovoltaic array. One such exemplary deployable
sheet material system 100 and parts, or portions, thereof is depicted inFIGS. 2-9 . The exemplary deployablesheet material system 100 may include a primary beam member 110 (e.g., a trunk beam, a composite trunk, a primary structure, a housing, etc.) that extends from afirst end region 112 to a second end region 114 (e.g., from a first end to a second end, from a location proximate the first end to a location proximate the second end, etc.) along anaxis 113. - The
primary beam member 110 may be coupled to thespacecraft 11 such that theprimary beam member 110 is spaced away from thespacecraft 11. In one or more embodiments, for example, as shown inFIG. 1A , theprimary beam member 110 may be coupled to and spaced away from thespacecraft 11 through anintermediate coupling member 12. In one or more embodiments, for example, as shown inFIG. 1B , multipleprimary beam members 110, each part of, or corresponding to, an independent deployablesheet material system 100, may be coupled to each other and theprimary beam members 110 may be configured to fold with respect to each another to reduce the profile of the deployablesheet material systems 100 when in the stowed configuration. As shown inFIGS. 1A-1C , the axis 113 (as shown inFIG. 2 ) of, or defined by, theprimary beam member 110 may be parallel or perpendicular to theintermediate coupling members 12 when deployed or spaced away from thespacecraft 11. Theprimary beam member 110 may be described as defining the structure to which other components of the deployablesheet material system 100 are coupled to, which, thereby, may be described as coupling the other components of the deployablesheet material system 100 to thespacecraft 11 or other base system. - The exemplary deployable
sheet material system 100 may further include one or more masts coupled to theprimary beam member 110 that are configured to extend from theprimary beam member 110 to locate, or position, one or more guy wires that will be used to stabilize thesheet material 142 as described further herein. As shown in the embodiment depicted inFIGS. 2-9 , the exemplary deployablesheet material system 100 includes afirst mast 120 coupled to theprimary beam member 110 and asecond mast 130 coupled to theprimary beam member 110 opposite thefirst mast 120. The first andsecond masts second masts primary beam member 110 as shown in FIG. 4. Theprimary beam member 110, the first andsecond masts - Each of the first and
second masts proximal region primary beam member 110 to adistal region second masts primary beam member 110 at, or proximate, theproximal regions second masts - The first and
second masts primary beam member 110 between thefirst end region 112 and thesecond end region 114 of theprimary beam member 110. As shown inFIG. 4 , each of the first andsecond masts primary beam member 110 about halfway (e.g., proximate a center region) between thefirst end region 112 and thesecond end region 114 of theprimary beam member 110. In one or more embodiments, the first andsecond masts first end region 112 than thesecond end region 114 or closer to thesecond end region 114 than thefirst end region 112. In one or more embodiments, the first andsecond masts primary beam member 110 directly opposite each other (e.g., on opposite sides of the primary member 110). In other embodiments, the first andsecond masts primary beam member 110 offset from each other (e.g., not directly opposite one another on the primary beam member 110). - As described herein, the exemplary deployable
sheet material systems 100 may be configured in a stowed configuration where thesheet material 142 is in storage, and in a deployed configuration, where thesheet material 142 is deployed (e.g., extended, unfurled, unrolled, unspooled, etc.) for use thereof. Likewise, the first andsecond masts second masts FIG. 2 and are deployed inFIG. 4 . - To allow movement from the stowed configuration to the deployed configuration, the
proximal regions second masts primary beam member 110. For example, the first andsecond masts proximal regions distal regions primary beam member 110. For example, when in the stowed configuration as shown inFIG. 2 , each of the first andsecond masts primary beam member 110. In this example, the first andsecond masts FIG. 4 , each of the first andsecond masts second masts primary beam member 110. In this example, the first andsecond masts primary beam member 110 orthogonally away from the primarybeam member axis 113. In other words, the first andsecond masts primary beam member 110 when transitioning from the stowed configuration to the deployed configuration. In one or more embodiments, the first andsecond masts FIG. 4 before the rest of thesystem 100 is completely configured into the deployed configuration as shown inFIG. 5 . Further, thedistal regions second masts primary beam member 110 when in the deployed configuration as shown inFIGS. 4-5 than when in the stowed configuration as shown inFIG. 2 . - The first and
second masts second masts FIGS. 2-9 , each of the first andsecond masts FIGS. 8-9 . As shown, thefirst mast 120 may include afirst mast portion 126 and asecond mast portion 128. InFIG. 8 , the first andsecond mast portions arrows 199 about pivot axes 198. InFIG. 9 , the first andsecond mast portions second mast portions second mast portion beam member axis 113. - It may be described that each of the first and
second mast portions distal regions first mast 120. For example, each of the first andsecond mast portions proximal region 122 and thedistal region 124. More specifically, theproximal region 122 of each of the first andsecond mast portions primary beam member 110 and thedistal region 124 of each of the first andsecond mast portions primary beam member 110 so as to be able to be moved into the deployed configuration. Although not further described herein, it is be understood that thesecond mast 130 and any other mast of the exemplary systems may also include first and second mast portions similar to those described with regards to thefirst mast 120. - In one or more embodiments, the first and
second masts primary beam member 110 from the stowed configuration shown inFIG. 2 to the deployed configuration as shown inFIG. 4 . In other words, the first andsecond masts FIG. 4 , but are held in place, or restricted from movement, until released. Still, in other words, the exemplary deployablesheet material system 100 may be described as storing potential energy that is configured to move the first andsecond masts exemplary system 100. For example, theexemplary system 100 may include one ormore mast actuators 129 configurable to release the first andsecond masts distal regions 124 of the first andsecond masts primary beam member 110 to a distance away from the primary beam member 110 (e.g., extending orthogonally from the primary beam member 110) into a deployed configuration. The biasing element, which is the element that is configured to bias, or predispose the first andsecond masts - As described, in the embodiment depicted in
FIGS. 2-9 , each of the first andsecond mast portions FIG. 8 , each of the first andsecond mast portion proximal regions 122 toward the deployed configuration as indicated byarrows 199. InFIG. 9 , the first andsecond mast portion first mast 120 have come together, or joined, to define thefirst mast 120 in the deployed configuration. When thefirst mast 120 is deployed, it may be described that the potential energy has been expended to move thefirst mast 120 into the deployed configuration. Further, in one or more embodiments, at least some energy may still be acting on thefirst mast 120 and/or portions thereof 126, 128 to maintain thefirst mast 120 configured into the deployed configuration (e.g., extending orthogonally to the primary beam member axis 113). - The exemplary deployable
sheet material system 100 may further include a plurality of guy wire mast pivots 171 coupled to thedistal regions 124 of the masts that are configured to receive and direct guy wires for supporting and stabilizing thesheet material 142 as will be further described herein. - The exemplary
deployable apparatus 140 of the deployablesheet material system 100 may be described as one or more portions, or pieces, of apparatus and/or structures configured to move thesheet material 142 away fromprimary beam member 110 towards, and ultimately to, the deployed configuration. Thedeployable apparatus 140 may be described in terms of the various types of motions, or movement, thedeployable apparatus 140 may perform when deploying thesheet material 142. For example, thedeployable apparatus 140 may be described as rollable apparatus, spoolable apparatus (i.e., configured to be spooled/unspooled), foldable apparatus, accordion shaped apparatus, winglets, compressible apparatus, etc. In other words, thedeployable apparatus 140 may extend in a variety of different ways such as, e.g., rolling, folding, accordion-like, sliding, etc. In the exemplary deployablesheet material system 100 depicted and described with reference toFIGS. 2-9 , thedeployable apparatus 140 may be described as spoolable apparatus because, e.g., the apparatus, or at least many parts, or portions, thereof may be spooled (e.g., placed or configured into a spooled state) when in the stowed configuration. - The exemplary
deployable apparatus 140 of the deployablesheet material system 100 may be coupled to theprimary beam member 110 and may be configured such that at least a portion of thedeployable apparatus 140 extends away from theprimary beam member 110 to position and support thesheet material 142 in an extended, substantially planar status, which in at least one example, is configured to collect solar energy. Thedeployable apparatus 140 may include a sheet material spool 148 (e.g., mandrel, spindle, reel, shaft, etc.) from which thesheet material 142 extends. For example, thesheet material 142 may be rolled-up or wound-up on thesheet material spool 148 such that increasing portions of thesheet material 142 may be configured to extend, or disperse, from thesheet material spool 148 while thesheet material spool 148 remains in place (e.g., similar to a carpenter's tape) while any remaining portion of thesheet material 142 remains rolled-up on thesheet material spool 148. Thesheet material spool 148 may be coupled to theprimary beam member 110 such that, e.g., thesheet material spool 148 may not move relative to theprimary beam member 110. In other words, a portion of thesheet material 142 may move relative to and extend away from theprimary beam member 110 while thesheet material spool 148 remains stationary proximate theprimary beam member 110. In contrast, other systems may include a spool that that extends away from (e.g., moves relative to) a primary beam member to dispose sheet material while the spool moves, or rolls, away from the primary beam member. Anchoring or affixing thesheet material spool 148 relative to theprimary beam member 110 may avoid the complexity attributed to having to move thesheet material spool 148 as would be the case in systems in which the spool moves, or rolls, away from theprimary beam member 110. Anchoring or affixing thesheet material spool 148 to theprimary beam member 110 may also improve the first vibration mode of thesystem 100 by minimizing the amount of mass far from theprimary beam member 110. - In the embodiment depicted, the
deployable apparatus 140 may include afirst boom member 150 proximate thefirst end region 112 of theprimary beam member 110, asecond boom member 160 proximate thesecond end region 114 of theprimary beam member 110, andsheet material 142 located between thefirst boom member 150 and thesecond boom member 160. Each of the first andsecond boom members primary beam member 110 parallel to anextension axis 101, which is perpendicular to the primarybeam member axis 113, to deploy thesheet material 142 when in the deployed configuration as shown inFIG. 5 . When in the stowed configuration, the first andsecond boom members primary beam member 110 as shown inFIG. 4 . - More specifically, each of the first and
second boom members proximal boom region primary beam member 110 to adistal boom region second boom members primary beam member 110 with theproximal boom regions primary beam member 110. For example, it may be described that thedistal boom regions second boom members primary beam member 110 when in the stowed configuration than when in the deployed and extended configuration. - As shown in
FIGS. 2-6 , the deployablesheet material system 100 may include a firstboom member housing 158 located proximate and coupled to thefirst end region 112 of theprimary beam member 110 and a secondboom member housing 168 located proximate and coupled to thesecond end region 114 of theprimary beam member 110. The first and secondboom member housings second boom member boom member housings second boom members second boom members boom member housings - In one or more embodiments, the first and
second boom members extension axis 101 into the deployment configuration. In other words, the first andsecond boom members system 100 may include a deployable (e.g., rollable, spoolable, etc.)apparatus actuator 149 that is configurable to release the deployable apparatus 140 (e.g., the first andsecond boom members 150, 160) as shown inFIGS. 3 and 6 . In other words, the deployable apparatus actuator 149 (e.g., a solenoid) may release theboom member boom member boom member housings 158, 168 (e.g., extending parallel to theextension axis 101 to deploy along the boom axes 103) without additional forces (e.g., passively). - In the embodiment depicted in
FIGS. 2-9 , each of the first andsecond boom members boom members second boom members second boom members - It may be described that the first and
second boom members sheet material system 100 is configured in the stowed configuration. The stored potential energy of the first andsecond boom members deployable apparatus 140 from the stowed configuration to the deployed configuration when released. More specifically, for example, the lenticular springs of the first andsecond boom members second boom members beam member housings second boom members second boom members deployable apparatus 140 in a passive manner based on the first andsecond boom members second boom members boom member housings - Additionally, as shown, each of the first and second
boom member housings more rollers 147 configured to guide the first orsecond boom members primary beam member 110. - As previously described herein, the
deployable apparatus 140 also includes the sheet material 142 (e.g., one or more photovoltaic arrays, solar shield, solar sail, etc.) located between the first andsecond boom members end beam 144 as shown inFIGS. 5 and 7 . Theend beam 144 may extend from thefirst boom member 150 to thesecond boom member 160 and may be coupled to each of thedistal regions second boom members - As shown in
FIG. 7 , thesheet material 142 or the portion ofsheet material 142 may be described as extending from adistal sheet region 143 to aproximal sheet region 146. Theproximal sheet region 146 may be located proximate to, and possibly coupled to, theprimary beam member 110. For example, theproximal sheet region 146 of thesheet material 142 may be coupled to theprimary beam member 110 through one or more elastic members (e.g., proximate the first andsecond end regions 112, 114). In other embodiments, theproximal sheet region 146 of thesheet material 142 may be directly coupled to theprimary beam member 110. Thedistal sheet region 143 may be located away from theprimary beam member 110 when in the deployed configuration as shown inFIGS. 5 and 7 . When thesheet material 142 is configured in the stowed configuration such as, e.g., “rolled up” or “spooled up” proximate theprimary beam member 110, both of the distal andproximal sheet regions sheet material 142 are proximate theprimary beam member 110. - The first and
second boom members sheet material 142 when theboom members sheet material 142 may be coupled to the first andsecond boom members deployable apparatus 140. For example, as shown, thesheet material 142 may not be directly coupled to the first orsecond boom members distal end region 143 of thesheet material 142 may be coupled to theend beam 144 and theend beam 144 may be coupled to each of the first andsecond boom members sheet material 142 and each of the first andsecond boom members FIG. 7 . In other embodiments, thedistal end region 144 or other side regions of thesheet material 142 may be coupled to the first andsecond boom members sheet material 142 is coupled to the first andsecond boom members 150, 160 (e.g., coupled directly thereto, coupled through other parts, portions, or apparatus, etc.), when theboom members sheet material 142 may also move along with the first andsecond boom members - As described herein, in one or more embodiments, the
sheet material 142 may include one or more solar arrays 145 (e.g., one or more photovoltaic arrays) disposed thereon as shown inFIG. 7 . For example, in one or more of the embodiments, thesheet material 142 may include a thin-film photovoltaic material (e.g., amorphous silicon, copper indium gallium selenide, inverted metamorphic multi-junction, cadmium telluride, organic photovoltaics, etc.) and/or a crystalline photovoltaic material (e.g., crystalline silicon, multi junction crystalline, gallium arsenide, etc.). In one or more of the embodiments, the sheet material 142 (e.g., thin-film photovoltaic material, crystalline photovoltaic material, etc.) may be combined with additional materials in layers (e.g., scrim cloth, glass, polyimide films, adhesives, encapsulations, circuit wiring, etc.) to form a solar array blanket assembly that may be configured to perform mechanical functions (e.g., blanket tensioning) and electrical functions (e.g., power transfer to the system or spacecraft). - In one or more embodiments, the
sheet material 142 may be in tension when in the deployed configuration. Tension on thesheet material 142 may be achieved by the geometry of the sheet, such that the fully deployedboom members sheet material 142 in tension by pushing on theend beam 144 to which thesheet material 142 is coupled. In one or more embodiments, thesheet material 142 may be placed in tension by a sheet tensioning apparatus that may be housed within theprimary beam member 110 or within the mandrel, or spindle, upon which thesheet material 142 is stored when in the stowed configuration. In one or more embodiments, the sheet tensioning apparatus may apply tension to thesheet material 142 by using, e.g., springs, elastic materials, etc. The sheet tensioning apparatus may be engaged continuously, or only after the other system elements have reached the deployed configuration. Such activation of the sheet tensioning apparatus may be achieved using any suitable type of release actuator such as, e.g., shape-memory alloy, paraffin, pyro-technic, burn wire, etc. - The one or more
solar arrays 145 may be flexible such that the one or moresolar arrays 145 can be stowed and extended along with thesheet material 142 as thesystem 100 moves between the stowed configuration and the deployed configuration. For example, in one or more of the embodiments, the sheet material 142 (e.g., the solar array blanket assembly) may be pliable such that thesheet material 142 may be spooled into a spooled state, or configuration, when the deployablesheet material system 100 is in the stowed configuration and may be unrolled or unspooled into an extended state, or configuration, (e.g., planar configuration) when the deployablesheet material system 100 is in the deployed configuration. - In one or more of the embodiments, the
sheet material 142 may include pliable sections that define fold lines such that thesheet material 142 may be folded into a prismatic shape (e.g. flattened accordion shape) when the deployablesheet material system 100 is in the stowed configuration and may be unfolded into a planar configuration when the deployablesheet material system 100 is in the deployed configuration. In one or more of the embodiments, thesheet material 142 may include a plurality of circuits that wire photovoltaic materials in a variety of series and parallel configurations to achieve desirable voltage and current parameters for thesheet material 142. - In one or more embodiments, the deployable
sheet material system 100 may include an electrical system (e.g., wires, cables, circuit board, etc.) electrically coupled to the sheet material 142 (e.g., the one or more photovoltaic arrays) to, e.g., transfer or transmit solar-generated electricity from thesheet material 142 to an electrical storage system. The electrical system may also electrically couple thesheet material 142 to a harness that passes adjacent to (e.g., along, though, etc.) the primary beam member 110 (e.g., alongprimary beam member 110 from thefirst end region 112 to thesecond end region 114, proximate thefirst end region 112, proximate thesecond end region 114, between the first andsecond end regions sheet material 142 to an additional component (e.g., module, housing, satellite portions, solar array drive assembly, diode board, etc.) at a location, e.g., proximate thefirst end region 112, proximate thesecond end region 114, between the first andsecond end regions - The deployable
sheet material system 100 may also include a plurality of guy wires 170 (e.g., cables, tethers, etc.) to support and stabilize thedeployable apparatus 140 when the deployablesheet material system 100 is in the deployed configuration as shown inFIG. 5 . The plurality ofguy wires 170 may be defined by various different configurations such as, e.g., a multi-stranded tether defined by a cross-strapped pattern. In other words, each of the plurality ofguy wires 170 may include (e.g., be formed up) a plurality of strands. - Generally, the plurality of
guy wires 170 may extend from a location outside of the plane defined boom axes 103 and the primarybeam member axis 113 to any location of the structures or apparatus described herein so as to provide support and stability to thesheet material 142 when in the extended, deployed configuration. For example, the plurality ofguy wires 170 may extend to one or more of thedistal sheet region 143 of thesheet material 142, theend beam 144, and thedistal boom regions beam member axis 113. As shown in this embodiment, the plurality ofguy wires 170 may include afirst guy wire 172 extending from at least the distal region 124 (e.g., the distal end) of thefirst mast 120 to the distal region 154 (e.g., the distal end) of thefirst boom member 150 and asecond guy wire 174 extending from at least the distal region 124 (e.g., the distal end) of thefirst mast 120 to the distal region 164 (e.g., the distal end) of thesecond boom member 160. The plurality ofguy wires 170 may also include a third guy wire 176 (e.g., the distal end) extending from at least the distal region 134 (e.g., the distal end) of thesecond mast 130 to the distal region 154 (e.g., the distal end) of thefirst boom member 150 and afourth guy wire 178 extending from at least the distal region 134 (e.g., the distal end) of thesecond mast 130 to the distal region 164 (e.g., the distal end) of thesecond boom member 160. Additionally, although theguy wires distal regions second boom members guy wires second boom members - The combination of one or more of the
first boom member 150, thesecond boom member 160, thefirst mast 120, thesecond mast 130, theend beam 144, theprimary beam member 110, thefirst guy wire 172, thesecond guy wire 174, thethird guy wire 176, and thefourth guy wire 178 may be described as forming a truss structure. As a result, the internal member loads of each of those one or more elements above may be placed either substantially in compression or tension. For example, the plurality of guy wires 170 (e.g., first, second, third,fourth guy wires first boom member 150, the second boom member 160) may be placed in compression to, e.g., stabilize and support thesystem 100. Specifically, tension applied to the plurality ofguy wires 170 may apply compression to the one or more boom members, which is in contrast to systems that do not apply any compression to the one or more boom members (e.g., the boom members are free standing in such systems without guy wires or other devices to place booms in compression). Placing the one or more boom members in compression may provide a variety of different advantages such as, e.g., providing stability, rigidity, support, etc. to thesystem 100 that may not be present in systems including boom members that are not in compression. - Further, in one or more embodiments, one or more of the
primary beam member 110, the first andsecond masts fourth guy wires end beam 144, and thesheet material 142 may be described as forming a winglet structure. In one or more embodiments, a plurality of winglet structures may be arranged such that thesheet material 142 of each winglet may be in a planar configuration and may form a solar array wing (e.g., two winglets may form a wing). In one or more embodiments, the system may include a plurality of winglets (e.g., aligned along an axis, distributed along a mounting structure, etc.). - The exemplary deployable
sheet material system 100 may include a first guy wire housing 181 (e.g., spool) configured to store (e.g., roll up, spool) at least a portion of thefirst guy wire 172 when in the stowed configuration as shown inFIG. 2 and a second guy wire housing 182 (e.g., spool) configured to store (e.g., roll up, spool) at least a portion of thesecond guy wire 174 when in the stowed configuration as shown inFIGS. 2 and 3 . Each of the first and secondguy wire housings primary beam member 110 or thefirst mast 120 such that thefirst guy wire 172 and thesecond guy wire 174 may extend to the first andsecond boom members distal region 124 of thefirst mast 120. For example, in one or more embodiments, the first and secondguy wire housings distal region 124 of thefirst mast 120. Further, for example, as shown inFIGS. 2 and 3 , the firstguy wire housing 181 may be located proximate thefirst end region 112 of theprimary beam member 110 and the secondguy wire housing 182 may be located proximate thesecond end region 114 of theprimary beam member 110. In one or more embodiments, thesystem 100 may include multiple guy wire housings to position and store a corresponding guy wire of the plurality ofguy wires 170. - As shown in
FIGS. 4-5 , thefirst guy wire 172 may extend from thefirst end region 112 of theprimary beam member 110 to thefirst boom member 150 through thedistal region 124 of thefirst mast 120 and thesecond guy wire 174 may extend from thesecond end region 114 of theprimary beam member 110 to thesecond boom member 160 through thedistal region 124 of thefirst mast 120. Thesystem 100 may include a plurality of guy wire mast pivots 171 positioned proximate thedistal region 124 of thefirst mast 120 as shown inFIG. 9 that may be configured to guide one or more of the plurality ofguy wires 170 from thefirst mast 120 to a corresponding boom member (e.g., the first orsecond boom members 150, 160) when thesystem 100 is moving between the stowed configuration and the deployed configuration. For example, the guy wire mast pivots 171 may move (e.g., pivot about an axis perpendicular to the primary beam axis 113) relative to thefirst mast 120 as the first andsecond boom members sheet material 142. - In one or more embodiments, the deployable
sheet material system 100 may further include one ormore tensioners 179 as shown inFIG. 9 to place the plurality ofguy wires 170 in tension. Placing the plurality ofguy wires 170 in tension may help to form the truss-like structure with distributed internal loads. In one or more embodiments, the one ormore tensioners 179 may be located proximate (e.g., attached to) the first orsecond mast corresponding guy wire 170 passes. Thetensioners 179 may be configured to be biased such that thetensioners 179 pull on theguy wire 170 until theguy wire 170 is taut. - In one or more embodiments, the deployable
sheet material system 100 may include additionaldeployable apparatus 240 coupled to theprimary beam member 110 opposite the deployable apparatus 140 (e.g., as shown inFIG. 5 ) and may be deployable opposite thedeployable apparatus 140. The additionaldeployable apparatus 240 may be a mirrored structure of thedeployable apparatus 140. For example, the additional deployable apparatus may include athird boom member 250 proximate thefirst end region 112 of theprimary beam member 110 andfourth boom member 260 proximate thesecond end region 114 of theprimary beam member 110. The additionaldeployable apparatus 240 may also include anadditional sheet material 242 between thethird boom member 250 and thefourth boom member 260. The additionaldeployable apparatus 240 may function in the same ways as described herein regarding thedeployable apparatus 140. - In one or more embodiments, a control apparatus (e.g., one or more processors employing one or more programs or routines carrying out one or more methods or processes and implemented with one or more types of memory) may be configured to control the system and/or one or more elements thereof moving between the stowed configuration and the deployed configuration. In one or more embodiments, the control apparatus may be configured to control the
deployable apparatus actuator 149 to release thedeployable apparatus 140 and control a rate of deployment such that thedeployable apparatus 140 deploys (e.g., passively) from the stowed configuration (e.g., spooled state) to the deployed configuration (e.g., extended state). In one or more embodiments, the control apparatus may be configured to control themast actuator 129 to release the first mast 120 (or second mast 130) and control a rate of deployment such that thedistal region 124 of thefirst mast 120 moves (e.g., passively) from proximate to theprimary beam member 110 to a distance away from theprimary beam member 110. - The methods and/or logic and/or configurations described in this disclosure, including those attributed to the systems, or various constituent components, may be implemented, at least in part, in hardware, software, firmware, or any combination thereof. For example, various aspects of the techniques may be implemented within one or more processors, including one or more microprocessors, microcontrollers, DSPs, ASICs, FPGAs, or any other equivalent integrated or discrete logic circuitry, as well as any combinations of such components, or other devices. The term “processor” or “processing circuitry” may generally refer to any of the foregoing logic circuitry, alone or in combination with other logic circuitry, or any other equivalent circuitry.
- Such hardware, software, and/or firmware may be implemented within the same device or within separate devices (e.g., within the system, outside of the system, or a combination of both) to support the various operations and functions described in this disclosure. In addition, any of the described components may be implemented together or separately as discrete but interoperable logic devices. Description of different features is intended to highlight different functional aspects and does not necessarily imply that such features must be realized by separate hardware or software components. Rather, functionality may be performed by separate hardware or software components, or integrated within common or separate hardware or software components.
- When implemented in software, the functionality ascribed to the systems and methods described in this disclosure may be embodied as instructions and/or logic on a computer-readable medium such as RAM, ROM, NVRAM, EEPROM, FLASH memory, magnetic data storage media, optical data storage media, or the like. The instructions and/or logic may be executed by one or more processors to support one or more aspects of the functionality described in this disclosure.
- An
exemplary method 1000 of deploying an exemplary deployablesheet material system 100 is shown inFIG. 10 . The method may include providing 1010 a deployable sheet material system such as, e.g., the deployablesheet material system 100 described herein with reference toFIGS. 2-9 . Themethod 1000 may also include deploying 1020 the distal region of the first mast from proximate the primary beam member to a distance away from the primary beam member. Themethod 1000 may further include moving one or more masts (e.g.,first mast 120, second mast 130) relative a primary beam member (e.g., primary beam member 110) to position a distal region of the one or more masts further away from the primary beam member than when in the stowed configuration and extending a plurality of boom members (e.g.,first boom member 150, second boom member 160) and sheet material (e.g., sheet material 142) away from the primary beam member to deploy the sheet material. - The
method 1000 may also include releasing the deployable apparatus to extend away from the primary beam member and/or releasing the one or more masts to move relative the primary beam member. In one or more embodiments, themethod 1000 may also include tensioning one or more of the plurality of guy wires after the plurality of boom members and the sheet material are extended away from the primary beam member. For example, a tensioner, or tensioner apparatus, may pull the plurality of guy wires until each of the plurality of guy wires is taut and carries a tensile internal load. - All embodiments described herein with regards to the system may be used in conjunction with embodiments described herein with regards to the methods. Additionally, all embodiments described herein with regards to the method may be used in conjunction with embodiments described herein with regards to the system.
- The following provides details about a plurality of embodiments of the present disclosure. One or more of the various features described may be used in various combinations to provide such embodiments.
- All patents, patent documents, and references cited herein are incorporated in their entirety as if each were incorporated separately. This disclosure has been provided with reference to illustrative embodiments and is not meant to be construed in a limiting sense. As described previously, one skilled in the art will recognize that other various illustrative applications may use the techniques as described herein to take advantage of the beneficial characteristics of the system and methods described herein. Various modifications of the illustrative embodiments, as well as additional embodiments of the disclosure, will be apparent upon reference to this description.
Claims (2)
1. A spacecraft system for deploying sheet material comprising:
a primary beam member extending from a first end region to a second end region;
a first mast coupled to the primary beam member;
a second mast coupled to the primary beam member opposite the first mast, wherein each of the first and second masts extends from a proximal region coupled to the primary beam member to a distal region, wherein the distal region of the first and second masts is positioned farther from the primary beam member when the system is in a deployed configuration than when the system is in a stowed configuration;
a spoolable apparatus coupled to the primary beam member, wherein the spoolable apparatus comprises:
a first boom member proximate the first end region of the primary beam member,
a second boom member proximate the second end region of the primary beam member, and
a sheet material extending from a proximal sheet region to a distal sheet region and located between the first and second boom members,
wherein the first boom member, second boom member, and the sheet material are in a spooled state when the system is in the stowed configuration, and wherein the first boom member, second boom member, and the sheet material are unspooled into an extended state when the system is in the deployed configuration; and
a plurality of guy wires comprising:
a first guy wire extending from at least the distal region of the first mast to the first boom member,
a second guy wire extending from at least the distal region of the first mast to the second boom member,
a third guy wire extending from at least the distal region of the second mast to the first boom member, and
a fourth guy wire extending from at least the distal region of the second mast to the second boom member.
2-20. (canceled)
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US20160332752A1 (en) | 2016-11-17 |
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