Study of mechanical architectures of large deployable space antenna apertures: from design to tests

Datashvili, L.; Endler, S.; Wei, Bian; Baier, H.; Langer, Harald F.; Friemel, M.; Tsignadze, N.; Santiago-Prowald, J.

doi:10.1007/s12567-013-0050-9

Cited by 60 publications

(16 citation statements)

References 6 publications

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“…By taking the coordinate values of each middle point in the yoz plane into (10), we can obtain the axial strain expressions of vertical bars (1-4), cables (5-12), cranks (13)(14)(15)(16)(17)(18)(19)(20), rails (21)(22)(23)(24), and central connecting rods (25)(26)(27)(28) as follows:…”

Section: Strain Energymentioning

confidence: 99%

“…where m 11 , m 12 , m 13 , m 22 , m 23 , and m 33 are the equivalent mass parameters of the beam model and ω means the vibration angular frequency of the beam model.…”

Section: Beam Kinetic Energymentioning

confidence: 99%

“…The Pactruss deployable antenna, which is composed of inner deployable truss, outer deployable truss, and central scissor-type link mechanism, was proposed by Escrig [11]. In 2012, Datashvili [12,13] developed a new double-hoop deployable truss and conducted a test for its deployable function. You et al [14] proposed a hoop mechanism with double-layer scissor hinge.…”

Section: Introductionmentioning

confidence: 99%

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Design and Dynamic Equivalent Modeling of Double-Layer Hoop Deployable Antenna

Guo

Shi

Lian

et al. 2018

International Journal of Aerospace Engineering

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This study proposes deployable units driven by elastic hinges and a double-layer hoop deployable antenna composed of these units. A rational modeling method based on the energy equivalence principle is presented to develop an equivalent model of the doublelayer hoop antenna in accordance with the structural characteristics of the antenna. The equivalent beam models of the rods with elastic hinges are proposed. The relationship of geometrical and material parameters is established considering the strain energy and the kinetic energy of the periodic unit, which are the same as those of the equivalent beam in the same displacement field. The equivalent model of the antenna is obtained by assembling several equivalent beam models in the circumferential direction. The precision of the equivalent model of the antenna is acceptable as found by comparing the modal analysis results obtained through equivalent model calculation, finite element simulation, and modal test.

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Section: Strain Energymentioning

confidence: 99%

“…where m 11 , m 12 , m 13 , m 22 , m 23 , and m 33 are the equivalent mass parameters of the beam model and ω means the vibration angular frequency of the beam model.…”

Section: Beam Kinetic Energymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design and Dynamic Equivalent Modeling of Double-Layer Hoop Deployable Antenna

Guo

Shi

Lian

et al. 2018

International Journal of Aerospace Engineering

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“…近年の宇宙開発において，大型で高精度な反射鏡アンテナシステムが求められており，今後のさらなる高精度化に向け，必要に応じてその形状を変えることのできる形状可変鏡システムが研究・開発されている (Theunissen et al, 2001, Tanaka and Natori, 2007, Datashvili et al, 2010．これらは，反射鏡の変形などにより生じる行路誤差（電波の位相誤差）を，鏡面の形状を適切に変化させることで低減することを目指したものであり，筆者らも圧電アクチュエータによりアンテナ鏡面の形状調整を行う高精度スマート形状可変鏡システムの開発を進めている．一方，形状可変鏡システムの形状制御に関する従来の研究では，その制御方法は様々であるが，アクチュエータは鏡面を押し引き可能なものを想定している (Belvin et al, 1989, Tabata and Natori, 1996, Tanaka , 2011．これらの形状可変鏡用のアクチュエータとして，摺動部を持たず，高精度な制御が可能である圧電アクチュエータの活用が期待されているが (Datashvili et al, 2010, Bradford et al, 2012 Vol. 29, No.…”

Section: 緒言unclassified

Path-length control for a reflector antenna using piezoelectric actuators and a focus adjustment mechanism

Tanaka

2016

Transactions of the JSME (In Japanese)

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A novel method for recovering antenna gains of a reflector antenna system using piezoelectric stack actuators and a focus adjustment mechanism is developed and its feasibility is investigated. Reconfigurable reflector antennas are promising technologies for high accuracy reflectors used for future high performance space missions. Piezoelectric stack actuators are good candidate for surface adjustment actuators for such reconfigurable reflector antennas in space, because they have no sliding portion. However, piezoelectric stack actuators are usually used for only pushing; therefore that causes some trouble in shape control of the reflector system. In order to overcome the problem, piston mode of wave front obtained by using piezoelectric stack actuators and the focus adjustment mechanism is utilized to make control inputs for the actuators positive values. In this method, a deteriorated wave front due to reflector deformations is adjusted to have new coherent wave front instead of recovering the original shape of the reflector. Some numerical simulations are carried out to investigate the feasibility of the developed method. The radiation patterns are analyzed for the corrected wave front by the developed method and that by the conventional shape control method using push/pull actuators. The results of these simulations show that the antenna gain is recovered adequately by using the developed method and the gain is almost same as that obtained by using the push/pull actuators. The effectiveness of the developed method is positively demonstrated by the comparison.

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“…Among these cable-net antennas, the hoop truss antennas have attracted lots of attentions and research interests in last two decades [16,17], and also have been applied in practical communication satellites [18,19]. The surface accuracy of a mesh antenna is often better than that of a inflatable antenna, however, the mesh antennas are mainly used in L-band because of their millimeter-level surface accuracy.…”

Section: Introductionmentioning

confidence: 99%

Novel Thermally Stable Segmented Solid Paraboloid Antenna for High Surface Accuracy

2021

AIAA Journal

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The rapidly growing communication demands in our society require the design of highperformance solid paraboloid antennas with extremely high surface accuracy, which remains a challenge due to the inevitable thermal deformations. In this study, we proposed a novel design of thermally stable segmented solid surface antenna with high surface accuracy. In this novel design, the antenna reflector is divided into a certain number of segmented pieces, each of which is then individually supported by an innovative Thermally Stable Grid Structure (TSGS). An analytical model based on Sanders improved first-approximation shell theory is developed to predict the thermal deformation of antenna surface, with which the proposed segmenting method in improving the surface accuracy of reflector antenna is theoretically approved. The working mechanism of the proposed TSGS that the thermal deformations at

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Study of mechanical architectures of large deployable space antenna apertures: from design to tests

Cited by 60 publications

References 6 publications

Design and Dynamic Equivalent Modeling of Double-Layer Hoop Deployable Antenna

Design and Dynamic Equivalent Modeling of Double-Layer Hoop Deployable Antenna

Path-length control for a reflector antenna using piezoelectric actuators and a focus adjustment mechanism

Novel Thermally Stable Segmented Solid Paraboloid Antenna for High Surface Accuracy

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