CN113871892A - Space-expandable solid-surface antenna based on Bennett mechanism and application - Google Patents
Space-expandable solid-surface antenna based on Bennett mechanism and application Download PDFInfo
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- CN113871892A CN113871892A CN202110934620.2A CN202110934620A CN113871892A CN 113871892 A CN113871892 A CN 113871892A CN 202110934620 A CN202110934620 A CN 202110934620A CN 113871892 A CN113871892 A CN 113871892A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/16—Reflecting surfaces; Equivalent structures curved in two dimensions, e.g. paraboloidal
- H01Q15/161—Collapsible reflectors
- H01Q15/162—Collapsible reflectors composed of a plurality of rigid panels
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- H—ELECTRICITY
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- H—ELECTRICITY
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Abstract
The invention belongs to the technical field of deployable antennas and discloses a space deployable fixed-surface antenna based on a Bennett mechanism and application thereof.A base of the antenna is fixed with an n-RRR/R deployable parallel mechanism which is composed of the Bennett mechanism as a basic unit, and an output rod of the deployable parallel mechanism is connected with a panel; a central chassis surface is fixed on the antenna base through a support column, and a feed source adjusting frame is fixed on the upper side of the central chassis surface. The Bennett mechanism has the minimum number of rods required by the unfolding panel, and meanwhile, the kinematic pair is a simple rotating pair, so that the unfolding reliability of the antenna is high; meanwhile, the Bennett mechanism has the least rotating pair, the error accumulation of the rotating pair is small, the alignment error of the unfolded panel is small, and the profile precision of the unfolded antenna is high finally. Lightweight and low cost: the panel deployment mechanism requires at least 4 members, and the Bennett mechanism is also the minimum number of rods, the lower the manufacturing cost and the lower the weight.
Description
Technical Field
The invention belongs to the technical field of deployable antennas, and particularly relates to a space deployable fixed surface antenna based on a Bennett mechanism and application thereof.
Background
At present, a space deployable antenna is widely applied to a plurality of fields such as satellite communication, deep space exploration and electronic countermeasure as electronic equipment for acquiring radio information, and large-caliber, light-weight and high-precision are important performance evaluation indexes for evaluating the performance of the deployable antenna. Due to the size limitation of the rocket fairing, the large-caliber antenna can only be made into an expandable type. The antenna is in a folded state in a transmitting stage, and is unfolded to form a working surface when reaching a preset track. High antenna operating frequency necessarily requires high profile accuracy, and a fixed-surface deployable antenna has the advantage of high profile accuracy. The most common solid surface expandable antenna is a petal type expandable solid surface antenna, but the antenna has the disadvantages of heavy structure, high manufacturing cost, low expansion reliability, large alignment error of the reflecting surface and the like. In addition, the antenna feed tripod has no machining and manufacturing errors and no compensation measures, so that the feed is not in a paraboloid focus, and the locking of the antenna in an unfolding state is complex. Therefore, a new deployable antenna is needed to solve the existing problems.
Through the above analysis, the problems and defects of the prior art are as follows: in the prior art, the precision of a reflecting surface can be derived from an expandable mechanism unit, and the feed source is not positioned at a paraboloid focus because of processing and manufacturing errors and no compensation measures; meanwhile, the locking of the antenna in the unfolding state is complex.
The difficulty in solving the above problems and defects is: the invention ensures that the antenna is unfolded/folded and simultaneously considers the pointing accuracy and reliability of the antenna; the deployable antenna requires a small mass, but the mass and the stiffness are contradictory to each other; the locking mechanism of the antenna in the unfolding state is reliable, and errors caused by over-positioning and under-constraint are avoided; the feed source tripod is not adjustable due to processing and manufacturing errors.
The significance of solving the problems and the defects is as follows: the space deployable solid-surface antenna based on the Bennett mechanism is optimally designed from the aspects of accuracy, adjustability, light weight, reliability and the like, the profile precision and the deployment reliability of the reflecting surface of the deployable antenna are effectively improved, the weight of the deployable antenna is reduced, and meanwhile, the feed source cabin is adjustable, so that errors caused by machining and manufacturing can be eliminated.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a space-expandable fixed-surface antenna based on a Bennett mechanism and application thereof.
The invention is realized in such a way that a space deployable solid-surface antenna based on a Bennett mechanism is provided with:
an antenna base;
an n-RRR/R extensible parallel mechanism which is formed by taking the Bennett mechanism as a basic unit is fixed on the antenna base, and an output rod of the n-RRR/R extensible parallel mechanism is connected with the panel;
a central chassis surface is fixed on the antenna base through a support column, and a feed source adjusting frame is fixed on the upper side of the central chassis surface.
Further, the n-RRR/R deployable mechanism includes: a base (static platform), a branched chain and a synchronous wheel (dynamic platform);
the Bennett mechanism unit comprises: the device comprises a synchronous spoke injection rod, a Bennett mechanism synchronous connecting rod, a Bennett mechanism output rod, a frame and an expandable unit locking structure.
The branched chain is composed of 3 revolute pairs formed by n groups of synchronizing wheels, a Bennett mechanism synchronizing connecting rod, a Bennett mechanism output rod and an antenna base, and a revolute pair formed by 1 synchronizing wheel and the antenna base.
Furthermore, the Bennett mechanism unit is a plurality of, each panel is rigidly connected to the output rod of the Bennett mechanism, and the panels and the central chassis surface form a full-circle parabolic reflecting surface after the antenna is completely unfolded.
Furthermore, the Bennett mechanism units are uniformly distributed in the circumferential direction of the antenna base, and a full-circumference parabolic reflecting surface is formed by the panel and the central chassis surface after the antenna is completely unfolded.
Further, the n-RRR/R extensible parallel mechanism consists of a base (a static platform), a branched chain and a synchronous wheel (a movable platform); the synchronizing wheel is connected with the output end of the motor, and the fixed end of the motor is installed on the antenna base.
Furthermore, oblique columns are uniformly distributed in the circumferential direction of the antenna base and used for mounting the panel and the output rod of the Bennett mechanism, and a rotary joint fixed on the antenna base is formed. Similarly, the same number of inclined columns with opposite angles are uniformly distributed on the circumference of the synchronous disc so as to realize the Bennett deployable mechanism unit;
oblique columns are uniformly distributed in the circumferential direction of the antenna base and used for mounting the panel and the output rod of the Bennett mechanism, and a rotary joint fixed on the antenna base is formed.
Further, the locking part of the deployable mechanism consists of a wedge-shaped block and a spring; an extensible unit locking part consisting of a wedge-shaped block and a spring is fixed in a cylindrical hole of an output rod of the Bennett mechanism; a limit groove embedded with a wedge block is reserved on the oblique column of the antenna base, and when the antenna is completely unfolded, the wedge block slides into the groove and is combined with a locking groove surface of the output rod of the Bennett mechanism to limit the output rod of the Bennett mechanism to rotate continuously; when the antenna needs to be folded, the output rod of the Bennett mechanism can be rotated reversely, and the wedge surface of the wedge block can slide out of the limiting groove.
Furthermore, the feed source adjusting frame is a 6-UPS parallel mechanism consisting of a hook joint, an electric push rod and a feed source disc, and has six degrees of freedom;
the feed source disc is connected with the upper end of the electric push rod through a spherical hinge, the bottom end of the electric push rod is connected with a hook hinge, and the hook hinge is fixed with the support column.
Another object of the present invention is to provide an application of the space-deployable solid-surface antenna based on the Bennett mechanism in satellite communication, deep space exploration or electronic countermeasure.
By combining all the technical schemes, the invention has the advantages and positive effects that: the invention has high reliability and high precision of the reflecting surface profile: the Bennett mechanism has the minimum number of rods required by the unfolding panel, and meanwhile, the kinematic pair is a simple rotating pair, so that the unfolding reliability of the antenna is high; meanwhile, the Bennett mechanism has the least rotating pair, and the error accumulation of the rotating pair is small, so that the surface precision of the reflecting surface of the unfolded antenna is high. Lightweight and low cost: the panel deployment mechanism requires at least 4 members, the Bennett mechanism is also the minimum number of rods, so the lower the manufacturing cost and the lower the weight, and thus the lower the launch cost, the single motor drive for the synchronizing wheels of the deployable mechanism unit further reduces weight and cost. Flexible and adjustable and rigidity is big: the feed source adjusting frame is a 6-UPS parallel mechanism, and the feed source can be adjusted to the position where the best reflecting surface of the antenna in the unfolding state is matched with the corresponding focus of the paraboloid through active control of the mechanism, so that the influence of the profile error of the reflecting surface of the antenna in the unfolding state on the electrical property of the antenna is reduced. The problem of unadjustable because of processing manufacturing error arouses is solved, and the rigidity of feed frame has been increased.
Drawings
Fig. 1 is a schematic structural diagram of a spatial deployable solid-surface antenna based on a Bennett mechanism provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of an n-RRR/R deployable parallel mechanism provided by an embodiment of the invention;
fig. 3 is a schematic diagram of an expandable single-branch structure of an antenna according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating the unfolding and folding process of the deployable parabolic antenna according to the embodiment of the present invention;
in the figure: fig. a, a collapsed state; FIG. b, intermediate state; fig. c, expanded state.
FIG. 5 is an exploded view of the deployable cell locking portion structure provided by an embodiment of the present invention;
in the figure: 1. an antenna base; 2. a Bennett mechanism unit; 201. a Bennett mechanism output rod; 202. a Bennett mechanism synchronization link; 203. synchronized spoke shooting (dashed lines); 204. a frame (dashed line); 3. a central chassis face; 4. a feed source adjusting frame; 401. Hooke's joint; 402. an electric push rod; 403. a feed source disc; 5. a panel; 6. a motor; 7. a synchronizing wheel; 8. a support pillar; 9. a wedge block; 10. a spring.
FIG. 6 is a diagram of a portion of a design demonstration of a deployable antenna mechanism provided by an embodiment of the invention;
in the figure: drawing a, plane intersection; figure b, space parallel; FIG. c, coplanar; graph d, spatial co-occurrence; graph e, non-intersecting straight lines on the hyperboloid of a single sheet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Aiming at the problems in the prior art, the invention provides a space-expandable fixed-surface antenna based on a Bennett mechanism and application thereof, and the invention is described in detail with reference to the accompanying drawings.
Those skilled in the art can also implement the method by adopting other steps, and the method provided by the invention based on the Bennett mechanism and provided by the figure 1 is only one specific embodiment.
As shown in fig. 1, the figure is a schematic diagram of an unfolded state of the antenna. The space-expandable fixed-surface antenna based on the Bennett mechanism is provided with an antenna base 1, an n-RRR/R expandable mechanism is fixed on the antenna base 1, and an output rod 201 of the n-RRR/R expandable parallel mechanism is connected with a panel 5. The antenna base 1 is fixed with a central chassis surface 3 through a support column 8, and a feed source adjusting frame 4 is fixed on the upper side of the central chassis surface 3.
As shown in fig. 2 and 3, the n-RRR/R deployable mechanism according to the embodiment of the present invention includes: panel 5, Bennett mechanism unit 2, synchronizing wheel 7;
the Bennett mechanism unit 2 includes: a Bennett mechanism output rod 201, a Bennett mechanism synchronizing link 202 and a synchronizing spoke shooter (dashed line) 203, a frame 204 (dashed line) deployable unit locking structure;
the n-RRR/R deployable mechanism is provided with a plurality of Bennett mechanism units 2, the output bar of each Bennett deployable mechanism unit 2 being rigidly connected to a respective single panel 5. n is the number of branches equal to the number of panels and is 12 in the figure, and R is the revolute pair. The Bennett mechanism units 2 are evenly distributed in the circumferential direction of the antenna base 1 so as to achieve synchronous unfolding of the panels 5 to form a full-circumference parabolic reflecting surface with the central chassis surface 3.
The n-RRR/R deployable parallel mechanism is characterized in that a static platform is a base, a movable platform is a synchronizing wheel, a branched chain consists of 3 rotating pairs formed by n groups of synchronizing wheels 7 and a Bennett mechanism synchronizing connecting rod 202, the Bennett mechanism synchronizing connecting rod 202 and a Bennett mechanism output rod 201, the Bennett mechanism output rod 201 and the base 1, and a rotating pair formed by the synchronizing wheels 7 and the base 1 is additionally arranged; in order to realize the unfolding and folding of the antenna, the n panels 5 are rigidly connected to output rods of the Bennett mechanism of the n-RRR/R unfolding parallel mechanism branched chain; the synchronizing wheel 7 is connected with the output end of the motor 6, and the fixed end of the motor 6 is arranged on the antenna base 1 and is used for driving the synchronizing wheel 7 to rotate; when the motor 6 drives the synchronizing wheel 7 to rotate, the n Bennett mechanism synchronizing connecting rods 202 are driven to move, so that the n Bennett mechanism output rods 201 are driven to move, and finally, the n panels 5 rigidly connected to the n Bennett mechanism synchronizing connecting rods are driven to move, so that the antenna is unfolded and folded (as shown in fig. 4). The antenna folded in the rocket launching stage (figure 4 (a)) is placed in a rocket fairing, and after the antenna enters a preset orbit, the motor drives the n-RRR/R deployable parallel mechanism to achieve the deployment of the antenna (figure 4 (c)).
Oblique columns are uniformly distributed in the circumferential direction of the antenna base 1 and used for installing the panel 5 and the output rod 201 of the Bennett mechanism, and a rotary joint fixed on the antenna base 1 is formed. Likewise, the synchronizing wheel 7 is also circumferentially and uniformly provided with the same number of inclined posts with opposite angles, so as to realize the Bennett deployable mechanism unit.
The panel 5 is fixedly connected with an output rod 201 of the Bennett mechanism through a bolt, and is equivalent to the same rod, and the panel is ingeniously characterized in that a bending rod at the bottom end of the panel effectively transmits synchronous compound motion of radial outward rotation and rotation around the axis of the panel according to the space unfolding principle, and avoids an interference region.
As shown in fig. 2, the feed adjustment frame 4 provided by the embodiment of the present invention is a 6-UPS parallel mechanism composed of a hooke joint 401, an electric push rod 402, and a feed plate 403, and has six degrees of freedom.
The feed source disc 403 is connected with the electric push rod 402 through a spherical hinge, the electric push rod 402 is connected with the Hooke hinge 401, and the Hooke hinge 401 is fixed with the support column 8.
The feed source adjusting frame can adjust the central point (the position of the feed source) of the feed source disc 403 through the length change of the electric drive push rod 402 to enable the central point to be located at the position where the optimal matching of the antenna unfolding state reflecting surface and the corresponding focus of the paraboloid (shown in figure 1) is achieved, and therefore the influence of the profile error of the antenna unfolding state reflecting surface on the electrical performance of the antenna is reduced. The problem of unadjustable because of processing manufacturing error arouses is solved, and the rigidity of feed frame has been increased.
As shown in fig. 4, in order to make the unfolding process of the embodiment of the present invention clearer, the antenna unfolding process is simulated; the results show that the antenna can be smoothly and smoothly deployed without interference between panels.
As shown in fig. 5, the extendable unit locking structure provided by the embodiment of the present invention is composed of a wedge 9 and a spring 10, wherein the wedge 9 is fixedly connected with the spring 10; the deployable cell locking structure is secured within a cylindrical bore of output rod 201 of the Bennett mechanism. The wedge block 9 is embedded in a limit groove reserved on the inclined column of the antenna base 1.
When the antenna is completely unfolded, the wedge block 9 slides into the groove, and the groove surface and the locking groove surface of the output rod 201 of the Bennett mechanism jointly limit the output rod 201 of the Bennett mechanism to rotate continuously; when the antenna needs to be folded, the output rod 201 of the Bennett mechanism can be rotated reversely, and the wedge surface of the wedge block 9 can slide out of the limiting groove.
Fig. 6 is a drawing showing a part of design proof of the deployable antenna mechanism according to the embodiment of the present invention. From the modified Kutzbach-Gr ü bler formula:
in the formulamThe order of the mechanism is (1 ≦m ≤ 6），nThe number of components (including the frame,n ≥ 2），f i the degree of freedom of the kinematic pair is (1 ≦f i ≤3）。
a) Since the expansion of the antenna requires a large range of rotational movement (about 100 degrees), the spherical pair (c) ((r))f= 3) is not suitable for use in the deployment mechanism.
b) Cylinder pair (f= 2), helical pair (f= 2) and sliding pair (f= 1) is also not suitable on deployment mechanisms because the kinematic pair is exposed to the environment.
c) Hooke's joint (f= 2) is composed of 3 components and 2 revolute pairs, and there are many kinematic pairs and components, so that reliability and accuracy are poor.
d) Composite hinge (f= 3) is composed of 4 components and 3 revolute pairs, and there are many kinematic pairs and components, so that reliability and accuracy are poor.
To achieve a deployment mechanism with high reliability, high precision, no interference and less corrosion by the external environment, the kinematic pair should be a rotary pair (A)f i = 1）。
For each panel, the deployment mechanism is a single closed-loop mechanism, son=gG-K equation becomesn=m+1。
When in usen= 2, thenmAnd = 1. This is only achieved if all kinematic pairs are kinematic pairs, so this is left to the eye.
When in usen= 3, thenmAnd (2). This condition isThis must be achieved by requiring all the revolute pair axes to meet in a plane (fig. 6 (a)). Whereas the unfolding of the panel is a complex movement in space, which is left out.
When in usen= 4, thenmAnd = 3. There are 4 cases at this time (FIG. 6 (b-d))
1) The axes of the revolute pairs are parallel in space (fig. 6 (b)), and the mechanism is a planar four-bar mechanism, so that the transmission of space motion cannot be realized, and the omission is avoided.
2) The revolute pair axes are coplanar (fig. 6 (c)), which can be achieved using hooke's joints (cross-couplings) or bevel gears. The hook joint disadvantages have been discussed previously. The bevel gear is very heavy and high in manufacturing cost, so that the bevel gear is not a good choice, and the situation is avoided.
3) The revolute pair axes are spatially concurrent (fig. 6 (d)), which is too harsh to achieve.
4) The axis of the revolute pair is a non-intersecting straight line on the hyperboloid of the single page (fig. 6 (e)), and the mechanism is a Bennett mechanism.
In summary, the deployment mechanism for the panel requires at least 4 members. The unfolding of the antenna fails because the unfolding of the panel fails whenever one member fails. From the viewpoint of reliability, the reliability is higher as the number of components is smaller because the antenna is developed as a series system. Meanwhile, the fewer the number of components, the fewer the kinematic pairs, so that the accumulated error caused by the kinematic pairs is smaller, the alignment error of the unfolded panel is smaller, and finally the profile precision of the unfolded antenna is higher. The lower the manufacturing cost. The smaller the weight and thus the lower the launch cost. The Bennett mechanism is therefore the best option for unfolding a single panel, with it being the basic unit for achieving a synchronized unfolding of the antenna. An n-RRR/R extensible parallel mechanism which is formed by taking the Bennett mechanism as a basic unit is fixed on the antenna base, and an output rod of the extensible parallel mechanism is connected with the panel; a central chassis surface is fixed on the antenna base through a support column, and a feed source adjusting frame is fixed on the upper side of the central chassis surface. The invention has high reliability and precision: the Bennett mechanism has the minimum number of rods required by the unfolding panel, and meanwhile, the kinematic pair is a simple rotating pair, so that the unfolding reliability of the antenna is high; meanwhile, the Bennett mechanism has the least rotating pair and small error accumulation of the rotating pair, so that the alignment error of the unfolded panel is small, and the profile precision of the unfolded antenna is high finally. Lightweight and low cost: the panel unfolding mechanism requires at least 4 members, the Bennett mechanism is also the minimum number of rods, so the lower the manufacturing cost and the lower the weight, and therefore the lower the launching cost, and the synchronous wheels of the unfolding parallel mechanism are driven by a single motor, so the weight and the cost are further reduced. Flexible and adjustable and rigidity is big: the feed source adjusting frame is a 6-UPS parallel mechanism, so that the problem of non-adjustability caused by machining and manufacturing errors is solved, and the rigidity of the feed source frame is increased.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention.
The above description is only for the purpose of illustrating the present invention and the appended claims are not to be construed as limiting the scope of the invention, which is intended to cover all modifications, equivalents and improvements that are within the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A spatial deployable solid surface antenna based on a Bennett mechanism, characterized in that it is provided with:
an antenna base;
an n-RRR/R extensible parallel mechanism which is formed by taking the Bennett mechanism as a basic unit is fixed on the antenna base, and an output rod of the n-RRR/R extensible parallel mechanism is connected with the panel;
a central chassis surface is fixed on the antenna base through a support column, and a feed source adjusting frame is fixed on the upper side of the central chassis surface.
2. The Bennett mechanism based space deployable solid-surface antenna according to claim 1, wherein the n-RRR/R deployable mechanism comprises: a base (static platform), a branched chain and a synchronous wheel (dynamic platform);
the Bennett mechanism unit comprises: the synchronous spoke shooting rod, the Bennett mechanism synchronous connecting rod, the Bennett mechanism output rod, the frame and the deployable unit locking structure;
the branched chain is composed of 3 revolute pairs formed by n groups of synchronizing wheels, a Bennett mechanism synchronizing connecting rod, a Bennett mechanism output rod and an antenna base, and a revolute pair formed by 1 synchronizing wheel and the antenna base.
3. A space-deployable fixed-area antenna based on a Bennett mechanism as claimed in claim 2, wherein the Bennett mechanism unit is in plurality, each panel is rigidly connected to the output rod of the Bennett mechanism, and the panels and the central chassis surface form a full-circumference parabolic reflecting surface when the antenna is fully deployed.
4. The spatial deployable fixed surface antenna based on the Bennett mechanism as claimed in claim 2, wherein the Bennett mechanism units are uniformly distributed in the circumferential direction of the antenna base, and a full-circumference parabolic reflecting surface is formed by the fully deployed rear panel and the central chassis surface of the antenna.
5. The Bennett mechanism-based space deployable fixed surface antenna according to claim 2, wherein the n-RRR/R deployable parallel mechanism is composed of a base (static platform), a branched chain and a synchronous wheel (movable platform); the synchronizing wheel is connected with the output end of the motor, and the fixed end of the motor is installed on the antenna base.
6. The space-deployable fixed-surface antenna based on the Bennett mechanism as claimed in claim 2, wherein inclined columns are uniformly distributed in the circumferential direction of the antenna base, are used for installing a panel and an output rod of the Bennett mechanism, and form a rotary joint fixed on the antenna base; likewise, the same number of inclined columns with opposite angles are uniformly distributed on the circumference of the synchronizing wheel so as to realize the Bennett deployable mechanism unit.
7. The Bennett mechanism based space deployable solid surface antenna according to claim 2, wherein the deployable mechanism locking portion is comprised of a wedge and a spring; an extensible unit locking part consisting of a wedge-shaped block and a spring is fixed in a cylindrical hole of an output rod of the Bennett mechanism; a limit groove embedded with a wedge block is reserved on the oblique column of the antenna base, and when the antenna is completely unfolded, the wedge block slides into the groove and is combined with a locking groove surface of the output rod of the Bennett mechanism to limit the output rod of the Bennett mechanism to rotate continuously; when the antenna needs to be folded, the output rod of the Bennett mechanism can be rotated reversely, and the wedge surface of the wedge block can slide out of the limiting groove.
8. The Bennett mechanism-based space-deployable solid-surface antenna as claimed in claim 1, wherein the feed adjustment frame is a 6-UPS parallel mechanism consisting of a hook hinge, an electric push rod and a feed plate, and has six degrees of freedom;
the feed source disc is connected with the upper end of the electric push rod through a spherical hinge, the bottom end of the electric push rod is connected with a hook hinge, and the hook hinge is fixed with the support column.
9. Use of a spatial deployable solid-surface antenna based on a Bennett mechanism as claimed in any one of claims 1 to 8 in satellite communications, deep space exploration or electronic countermeasure.
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| CN202110934620.2A CN113871892B (en) | 2021-08-16 | 2021-08-16 | Space-expandable solid-surface antenna based on Bennett mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116646745A (en) * | 2023-07-27 | 2023-08-25 | 银河航天(西安)科技有限公司 | Phased array antenna |
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| CN116646745B (en) * | 2023-07-27 | 2023-10-24 | 银河航天(西安)科技有限公司 | Phased array antenna |
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