CN112061432B - Parabolic cylinder antenna low-gravity unfolding test bed based on curved guide rail - Google Patents
Parabolic cylinder antenna low-gravity unfolding test bed based on curved guide rail Download PDFInfo
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- CN112061432B CN112061432B CN202011024734.5A CN202011024734A CN112061432B CN 112061432 B CN112061432 B CN 112061432B CN 202011024734 A CN202011024734 A CN 202011024734A CN 112061432 B CN112061432 B CN 112061432B
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Abstract
The invention belongs to the technical field of satellite antennas, and particularly relates to a parabolic cylinder antenna low-gravity unfolding test bed based on a curved guide rail in the field of satellite antennas, which comprises a supporting frame, an arc guide rail, a curve guide rail, a fixed pulley, a movable pulley and a linear guide rail, and is characterized in that: a splayed opening is formed in the front of the three-dimensional frame by the supporting frame, the curve guide rail and the arc guide rail are respectively fixed in the front and back of the splayed opening, the linear guide rail is installed at the upper end and the lower end of the left and right distance of the supporting frame, the fixed pulley is arranged on the linear guide rail, the movable pulley is sleeved on the arc guide rail and the curve guide rail, the movable pulley can slide along the arc guide rail and the curve guide rail, and the cylindrical antenna reflecting surface is limited at the splayed opening through the movable pulley and is of an arc surface structure. The invention solves the problem that the existing low-gravity test bed only uses a linear guide rail, and has the advantages of simple structure and easy manufacture.
Description
Technical Field
The invention belongs to the technical field of satellite antennas, and particularly relates to a parabolic cylinder antenna low-gravity unfolding test bed based on a curved guide rail in the field of satellite antennas.
Background
With the rapid development of aerospace science and technology, a satellite-borne deployable antenna is an important component of a satellite structure, and is a focus and research hotspot of international space research institutions. Due to the height of the orbit and the centrifugal force generated when the spacecraft runs around the ground, the environment of the deployable antenna is a microgravity environment when the deployable antenna is deployed in the orbit, and due to the fact that the simulation cost in the space is too high, the low-gravity test bed is constructed on the ground and has important significance.
The key of building the ground microgravity environment is to carry out gravity unloading on the deployable antenna, and the low gravity environment building method mainly comprises a tower falling method, a parabolic flight method, a buoyancy method and a suspension method. The factors such as operability, repeatability, economy and the like are comprehensively considered, the existing suspension method is the most common gravity unloading method, the application range of the suspension method is further improved, the cost is reduced, and the method has important value in engineering practice.
In 2018, master thesis of Yanshan university, shear-type deployable antenna kinematic analysis and gravity unloading scheme design, Korean Jiaxu, Yanshan university, 2018, designs a shear-type space deployable antenna microgravity test bed, so that a guide rail trolley linearly moves in the horizontal direction, and gravity unloading is performed by an active wire hanging counterweight method.
The low gravity test bed is only suitable for a shear type space expandable antenna, and the linear guide rail cannot be suitable for expansion and unloading of the parabolic cylinder antenna.
In 2020, Qin Bo et al, in the article "design and analysis of foldable parabolic cylinder antenna mechanism", 2020,56(05): 100-. However, the low-gravity test bed is not involved, so that the low-gravity unfolding process simulation of the real object cannot be carried out.
Disclosure of Invention
The invention aims to solve the problem that the low-gravity test bed applied to the unfolding process of the parabolic cylinder antenna is provided, solves the problem that the existing low-gravity test bed only has a linear guide rail and cannot be applied to the parabolic cylinder antenna, and has the advantages of simple structure and easiness in manufacturing.
The technical scheme of the invention is as follows: the utility model provides a low gravity of parabolic cylinder antenna expandes test bench based on crooked guide rail, includes braced frame, circular arc guide rail, curve guide rail, fixed pulley, removes pulley, linear guide, its characterized in that: a splayed opening is formed in the front of the three-dimensional frame by the supporting frame, the curve guide rail and the arc guide rail are respectively fixed in the front and back of the splayed opening, the linear guide rail is installed at the upper end and the lower end of the left and right distance of the supporting frame, the fixed pulley is arranged on the linear guide rail, the movable pulley is sleeved on the arc guide rail and the curve guide rail, the movable pulley can slide along the arc guide rail and the curve guide rail, and the cylindrical antenna reflecting surface is limited at the splayed opening through the movable pulley and is of an arc surface structure.
The supporting frame is a frame body formed by connecting a frame body supporting rod, an antenna fixing rod, a guide rail fixing piece and a universal wheel, and the universal wheel is fixed at the bottom of the frame body so that the frame body can move freely; the frame body support bar at least includes: 2 vertical rods are arranged on the left and right sides, 2 vertical rods are arranged at the rear ends, 2 cross rods are arranged on the left and right sides, and 2 cross rods are arranged on the upper and lower sides horizontally; the left vertical rod, the right vertical rod, the left cross rod and the right cross rod are connected into a left-right quadrilateral frame, the left-right quadrilateral frame is connected into a three-dimensional frame by the rear end 2 vertical rods and the horizontal upper cross rod and the horizontal lower cross rod 2 cross rods, the horizontal upper cross rod and the horizontal lower cross rod 2 cross rods are in the backward position of the quadrilateral frame, and a splayed opening is formed in front of the three-dimensional frame by the connection of the upper inclined rod, the lower inclined rod, the upper cross rod and the lower cross rod 1 cross rod between the quadrilateral frame and the horizontal upper cross rod 2 cross rods; the curved guide rail and the arc guide rail are respectively fixed in front of and behind the splayed opening, the linear guide rail is fixed between 2 vertical rods at the rear end, and the two antenna fixing rods are fixed at the lower end of the linear guide rail; a stationary rod for fixing the parabolic cylinder antenna; and guide rail fixing parts are distributed and fixed on the top of the formed three-dimensional frame.
The number of the guide rail fixing pieces is eight, and the guide rail fixing pieces are used for fixing two ends of the arc guide rail and the curve guide rail; each guide rail fixing piece comprises an upper guide rail fixing piece part and a lower guide rail fixing piece part, and the bent guide rail is fixedly connected through a screw.
The arc guide rail is composed of a radius arc, and the curve guide rail is composed of a plurality of radius arcs or radius arcs which are larger than the radius of the arc guide rail.
The arc guide rail is a track in the horizontal plane projection direction of an internal node on the antenna, and the curve guide rail is a track in the horizontal plane projection direction of an external node on the antenna; the two ends of the arc guide rail and the curve guide rail are straight circular tubes, through holes with the same size as the guide rail fixing parts are formed in the middle positions of the two ends of the arc guide rail and the curve guide rail, and the arc guide rail and the curve guide rail are connected with the guide rail fixing parts through screws to complete the positioning of the bent guide rail; the two fixed pulleys are fixed on the middle plane of the frame body and used for suspending two direct-acting nodes on the antenna direct-acting rod; the linear guide rail is a motion track of a straight moving rod on the antenna and used for guiding the straight moving rod in the unfolding process, and the reflecting surface of the cylindrical antenna is fixed by an external node, an internal node, a straight moving node and the straight moving rod; the outer nodes are arranged at the two ends of the cylindrical antenna reflecting surface, and the cylindrical antenna reflecting surface arc supports are formed by the inner nodes, the direct-acting nodes and the direct-acting rods.
The invention has the beneficial effects that: the invention installs the curve guide rail on the low gravity test bed, realizes the weight reduction of the non-linear track component in the unfolding process of the parabolic cylinder antenna and solves the problem that the existing low gravity test bed only has the linear guide rail. Compared with the existing low gravity test bed, the invention also has the following advantages:
1. the invention has simple structure, the upper part and the lower part of the frame body can be directly formed by welding square steel pipes, the vertical rods are connected by bolts, and the seven vertical rods are connected with the upper part and the lower part of the frame body by bolts and nuts, thereby having the advantages of low manufacturing cost and good detachability.
2. The bending guide rail is directly manufactured by a numerical control bending machine, and the fixed pulley, the movable pulley, the universal wheel and the like are standard parts, so that the bending guide rail is simple and reliable in structure and low in cost.
Drawings
FIG. 1 is a schematic overall view of the apparatus of the present invention;
FIG. 2 is a schematic view of the support frame of the apparatus of the present invention;
FIG. 3 is a schematic view of a rail mount of the apparatus of the present invention;
FIG. 4 is a schematic view of a circular arc guide of the apparatus of the present invention;
FIG. 5 is a schematic view of a curvilinear guide track of the apparatus of the present invention;
fig. 6 is a schematic diagram of the connection of the present invention to a parabolic dish antenna.
Description of reference numerals: 1. a support frame; 2. a circular arc guide rail; 3. a curved guide rail; 4. fixing the pulley; 5. a movable pulley; 6. a linear guide rail; 11. a frame body; 12. an antenna fixing rod; 13. a guide rail fixing member; 14. a universal wheel; 131. the upper part of the guide rail fixing piece; 132. the lower part of the guide rail fixing piece; 71. a cylindrical antenna reflecting surface; 72. an external node; 73 internal nodes; 74. a direct acting node; 75. the pole is directly moved.
Detailed Description
As shown in fig. 1 and 2, a parabolic cylinder antenna low gravity unfolding test bed based on a curved guide rail comprises a support frame 1, an arc guide rail 2, a curved guide rail 3, a fixed pulley 4, a movable pulley 5 and a linear guide rail 6, and is characterized in that: braced frame 1 forms a splayed opening in front of space frame, and curve guide 3 and circular arc guide 2 are fixed around the splayed opening respectively, and linear guide 6 is installed apart from the upper and lower extreme in the middle position about braced frame 1, has a fixed pulley 4 on linear guide 6, has cup jointed removal pulley 5 on circular arc guide 2 and curve guide 3, and removal pulley 5 can slide along circular arc guide 2 and curve guide 3, and cylindrical antenna plane of reflection 71 is spacing at the splayed opening part through removing pulley 5, is the cambered surface structure.
Braced frame 1 be the frame body that constitutes by frame body bracing piece 11, antenna fixed pole 12, guide rail mounting 13, universal wheel 14 connection, universal wheel 14 is fixed in the bottom of frame body, makes the frame body ability remove at will, frame body bracing piece 11 includes at least: 2 vertical rods are arranged on the left and right sides, 2 vertical rods are arranged at the rear ends, 2 cross rods are arranged on the left and right sides, and 2 cross rods are arranged on the upper and lower sides horizontally; the left vertical rod, the right vertical rod, the left cross rod and the right cross rod are connected into a left-right quadrilateral frame, the left-right quadrilateral frame is connected into a three-dimensional frame by the rear end 2 vertical rods and the horizontal upper cross rod and the horizontal lower cross rod 2 cross rods, the horizontal upper cross rod and the horizontal lower cross rod 2 cross rods are in the backward position of the quadrilateral frame, and a splayed opening is formed in front of the three-dimensional frame by the connection of the upper inclined rod, the lower inclined rod, the upper cross rod and the lower cross rod 1 cross rod between the quadrilateral frame and the horizontal upper cross rod 2 cross rods; the curved guide rail 3 and the arc guide rail 2 are respectively fixed in front of and behind the splayed opening, the linear guide rail 6 is fixed between the 2 vertical rods at the rear end, and the two antenna fixing rods 12 are fixed at the lower end of the linear guide rail 6; a stationary rod for fixing the parabolic cylinder antenna; and guide rail fixing parts 13 are distributed and fixed at the top of the formed three-dimensional frame.
As shown in fig. 3, the number of the rail fixing members 13 is eight, and the rail fixing members are used for fixing both ends of the arc rail 2 and the curved rail 3; each rail mount 13 comprises an upper part 131 and a lower part 132 for fixing the curved rail by means of a screw connection.
As shown in fig. 4 and 5, the circular arc guide 2 in fig. 4 is formed of one circular arc of a radius, and the curved guide 3 in fig. 5 is formed of a plurality of circular arcs of a radius or a circular arc of a radius larger than that in fig. 4.
Referring to fig. 4, 5 and 6, the arc guide rail 2 is a track of the antenna on the inner node 73 in the horizontal plane projection direction, and the curve guide rail 3 is a track of the antenna on the outer node 72 in the horizontal plane projection direction; the two ends of the arc guide rail 2 and the curve guide rail 3 are straight circular tubes, through holes with the same size as the guide rail fixing pieces 13 are formed in the middle positions of the two ends, and the through holes are connected with the guide rail fixing pieces 13 through screws to complete positioning of the bent guide rail; two fixed pulleys 4 are fixed on the middle plane of the frame body and used for suspending two direct-acting nodes 74 on an antenna direct-acting rod 75; the linear guide rail 6 is a motion track of a straight moving rod on the antenna and used for guiding the unfolding process of the straight moving rod 75, and the cylindrical antenna reflecting surface 71 is fixed by an external node 72, an internal node 73, a straight moving node 74 and the straight moving rod 75; the external nodes 72 are positioned at two ends of the cylindrical antenna reflecting surface 71, and the cylindrical antenna reflecting surface 71 is supported in an arc shape by the internal nodes 73, the linear motion nodes 74 and the linear motion rods 75.
In summary, the supporting frame of the present invention includes a frame body, an antenna fixing rod, a rail fixing member, and the like, which are intermediate members connecting all the members; the movable pulley can slide along a curved guide rail, and the curved guide rail is an expansion track of four points on the antenna in the horizontal plane projection direction; by suspending the corresponding weight by the moving pulley and the fixed pulley, the low-gravity deployment of the parabolic cylinder antenna can be performed.
The invention installs the curve guide rail on the low gravity test bed, realizes the weight reduction of the non-linear track component in the unfolding process of the parabolic cylinder antenna, solves the problem that the existing low gravity test bed only uses the linear guide rail, and has the advantages of simple structure and easy manufacture.
The parts of the present embodiment not described in detail are common means known in the art, and are not described here. The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention.
Claims (4)
1. The utility model provides a low gravity of parabolic cylinder antenna expandes test bench based on crooked guide rail, includes braced frame (1), circular arc guide rail (2), curve guide rail (3), fixed pulley (4), removes pulley (5), linear guide (6), its characterized in that: the support frame (1) forms a splayed opening in front of the three-dimensional frame, the curved guide rail (3) and the arc guide rail (2) are respectively fixed in front of and behind the splayed opening, the upper end and the lower end of the left-right distance middle position of the support frame (1) are provided with the linear guide rail (6), the linear guide rail (6) is provided with the fixed pulley (4), the arc guide rail (2) and the curved guide rail (3) are sleeved with the movable pulley (5), the movable pulley (5) can slide along the arc guide rail (2) and the curved guide rail (3), and the cylindrical antenna reflecting surface (71) is limited at the splayed opening through the movable pulley (5) and is of an arc surface structure; the arc guide rail (2) is a track of an inner node (73) on the antenna in the horizontal plane projection direction, and the curve guide rail (3) is a track of an outer node (72) on the antenna in the horizontal plane projection direction; the two ends of the arc guide rail (2) and the curve guide rail (3) are straight circular pipes, through holes with the same size as the guide rail fixing piece (13) are formed in the middle positions of the two ends, and the through holes are connected with the guide rail fixing piece (13) through screws to complete the positioning of the bent guide rail; two fixed pulleys (4) are fixed on the middle plane of the frame body and are used for suspending two direct-acting nodes (74) on the antenna direct-acting rod (75); the linear guide rail (6) is a motion track of a straight moving rod on the antenna and used for guiding the unfolding process of the straight moving rod (75), and the cylindrical antenna reflecting surface (71) is fixed by an external node (72), an internal node (73), a straight moving node (74) and the straight moving rod (75); the external nodes (72) are arranged at the two ends of the cylindrical antenna reflecting surface (71), and the cylindrical antenna reflecting surface (71) is supported in an arc shape by the internal nodes (73), the straight moving nodes (74) and the straight moving rods (75).
2. The parabolic cylinder antenna low-gravity unfolding test bed based on the curved guide rail as claimed in claim 1, wherein: the supporting frame (1) is a frame body formed by connecting a frame body supporting rod (11), an antenna fixing rod (12), a guide rail fixing piece (13) and a universal wheel (14), and the universal wheel (14) is fixed at the bottom of the frame body to enable the frame body to move randomly; the frame support bar (11) at least comprises: 2 vertical rods are arranged on the left and right sides, 2 vertical rods are arranged at the rear ends, 2 cross rods are arranged on the left and right sides, and 2 cross rods are arranged on the upper and lower sides horizontally; the left vertical rod, the right vertical rod, the left cross rod and the right cross rod are connected into a left-right quadrilateral frame, the left-right quadrilateral frame is connected into a three-dimensional frame by the rear end 2 vertical rods and the horizontal upper cross rod and the horizontal lower cross rod 2 cross rods, the horizontal upper cross rod and the horizontal lower cross rod 2 cross rods are in the backward position of the quadrilateral frame, and a splayed opening is formed in front of the three-dimensional frame by the connection of the upper inclined rod, the lower inclined rod, the upper cross rod and the lower cross rod 1 cross rod between the quadrilateral frame and the horizontal upper cross rod 2 cross rods; the curved guide rail (3) and the arc guide rail (2) are respectively fixed in front of and behind the splayed opening, the linear guide rail (6) is fixed between the 2 vertical rods at the rear end, and the two antenna fixing rods (12) are fixed at the lower end of the linear guide rail (6); a stationary rod for fixing the parabolic cylinder antenna; and guide rail fixing parts (13) are distributed and fixed at the top of the formed three-dimensional frame.
3. The parabolic cylinder antenna low-gravity unfolding test bed based on the curved guide rail as claimed in claim 2, wherein: the guide rail fixing pieces (13) are eight in number and are used for fixing two ends of the arc guide rail (2) and the curve guide rail (3); each rail mount (13) comprises an upper rail mount part (131) and a lower rail mount part (132) to which the curved rail is fixed by means of screw connections.
4. The parabolic cylinder antenna low-gravity unfolding test bed based on the curved guide rail as claimed in claim 1, wherein: the arc guide rail (2) is composed of a radius arc, and the curve guide rail (3) is composed of a plurality of radius arcs or radius arcs which are larger than the radius of the arc guide rail.
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| CN202011024734.5A CN112061432B (en) | 2020-09-25 | 2020-09-25 | Parabolic cylinder antenna low-gravity unfolding test bed based on curved guide rail |
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| CN112061432B true CN112061432B (en) | 2022-02-25 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3516179A (en) * | 1968-01-26 | 1970-06-23 | Nasa | Mechanical simulator of low gravity conditions |
| JPH11115900A (en) * | 1997-10-14 | 1999-04-27 | Nippon Telegr & Teleph Corp <Ntt> | Hanging device |
| CN102145755A (en) * | 2010-02-10 | 2011-08-10 | 上海卫星工程研究所 | Zero-gravity suspension type deployment test device |
| CN103972661A (en) * | 2014-05-19 | 2014-08-06 | 中国科学院国家天文台 | Parabolic cylinder antenna device |
| CN106275525A (en) * | 2016-08-12 | 2017-01-04 | 浙江工商大学 | A kind of sun wing plate air supporting supports ground simulation hanging expanding unit |
| CN106564630A (en) * | 2016-11-09 | 2017-04-19 | 上海卫星工程研究所 | Gravity balance and follow-up system for deployment of large-scale parabolic cylindrical antenna |
| CN107933980A (en) * | 2017-11-17 | 2018-04-20 | 哈尔滨工业大学 | Main passive combined suspention zero-g simulation system and analogy method |
| CN108382616A (en) * | 2018-05-17 | 2018-08-10 | 燕山大学 | The suspention gravity-compensated device being servo-actuated based on magnetic suspension |
| CN108535035A (en) * | 2018-03-20 | 2018-09-14 | 北京航空航天大学 | A kind of zero-g hanging test device for cylinder unwrapping mechanism |
| CN109540198A (en) * | 2018-10-17 | 2019-03-29 | 南京航空航天大学 | A kind of parabolic-cylinder antenna expansion reflecting surface ground-testing plant |
-
2020
- 2020-09-25 CN CN202011024734.5A patent/CN112061432B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3516179A (en) * | 1968-01-26 | 1970-06-23 | Nasa | Mechanical simulator of low gravity conditions |
| JPH11115900A (en) * | 1997-10-14 | 1999-04-27 | Nippon Telegr & Teleph Corp <Ntt> | Hanging device |
| CN102145755A (en) * | 2010-02-10 | 2011-08-10 | 上海卫星工程研究所 | Zero-gravity suspension type deployment test device |
| CN103972661A (en) * | 2014-05-19 | 2014-08-06 | 中国科学院国家天文台 | Parabolic cylinder antenna device |
| CN106275525A (en) * | 2016-08-12 | 2017-01-04 | 浙江工商大学 | A kind of sun wing plate air supporting supports ground simulation hanging expanding unit |
| CN106564630A (en) * | 2016-11-09 | 2017-04-19 | 上海卫星工程研究所 | Gravity balance and follow-up system for deployment of large-scale parabolic cylindrical antenna |
| CN107933980A (en) * | 2017-11-17 | 2018-04-20 | 哈尔滨工业大学 | Main passive combined suspention zero-g simulation system and analogy method |
| CN108535035A (en) * | 2018-03-20 | 2018-09-14 | 北京航空航天大学 | A kind of zero-g hanging test device for cylinder unwrapping mechanism |
| CN108382616A (en) * | 2018-05-17 | 2018-08-10 | 燕山大学 | The suspention gravity-compensated device being servo-actuated based on magnetic suspension |
| CN109540198A (en) * | 2018-10-17 | 2019-03-29 | 南京航空航天大学 | A kind of parabolic-cylinder antenna expansion reflecting surface ground-testing plant |
Non-Patent Citations (4)
| Title |
|---|
| 《一种周边桁架式可展开天线展开过程的索网张力分析方法》;茹文锐等;《空间电子技术》;20151025(第05期);84-96 * |
| 《一种大型全可动反射面天线的轻量化创新设计》;冯树飞等;《中国科学:物理学 力学 天文学》;20170501(第05期);5-11 * |
| 《航天器结构的零重力环境模拟试验问题》;何传大;《强度与环境》;19860630(第03期);6-10 * |
| 《赋形卡氏天线主面变形的副面实时补偿》;冷国俊;《系统工程与电子技术》;20110531;第33卷(第5期);996-1000 * |
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