&lt;title&gt;Reconfigurable contour beam generation using a smart subreflector antenna system&lt;/title&gt;

Yoon, Hwan‐Sik; Washington, Gregory; Theunissen, Wilhelmus H.

doi:10.1117/12.388890

Cited by 3 publications

(4 citation statements)

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“…As stated in Section II-C3, it should be verified mathematically if the objective function defined in (12) has more than one local minimum point in the feasible design space. This verification will justify the use of the direct search technique rather than probabilistic techniques such as the simulated annealing method.…”

Section: Discussionmentioning

confidence: 99%

“…More actuators can be added if more resolution is needed and actuators can be removed if redundancies are not needed. A weighted average of the actuator positions for each land mass can be used to find the final actuator positions [12]. The problem is now reduced to finding the actuator deflection values and their positions for a given landmass.…”

Section: Software and Sensing Systemmentioning

confidence: 99%

“…Each variable in the design space corresponds to the actuation value of each actuator and it is constrained by the stroke limit (calculated to avoid maximum yield stress of the actuators. The cost function that needs to be minimized in the optimization process can be defined as (12) where is the actual value of subreflector deflection at the th nodal point, is the desired value of deflection and is the total number of nodes in the finite element model. The actual value of deflection can be found from the calculation of the finite element analysis and the desired value can be obtained from a reflector synthesis code.…”

Section: ) Optimization Of Actuation Values (Deflections)mentioning

confidence: 99%

“…This is because of the fact that convection cooling cannot be expected in any space application and it is relatively costly to have satellites equipped with cooling systems. In order to get around these problems while retaining reconfigurability, several researchers have investigated mechanically reconfigurable reflector antennas [9]- [12]. One of the most successful designs was an array-fed reconfigurable mesh reflector antenna consisting of a knitted mesh reflector with 78 actuators attached to every node in order to generate and hold various surface shapes [9].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Design, modeling, and optimization of mechanically reconfigurable aperture antennas

Washington¹,

Yoon²,

Angelino³

et al. 2002

IEEE Trans. Antennas Propagat.

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The work in this study develops the framework for placement and actuation of novel reconfigurable dual-offset contour beam reflector antennas (DCBRA). Toward that end, the methodology for the antennas' design is defined. In addition, two separate optimization problems are stated and solved: actuator position optimization and actuation value optimization. For the former, a method termed as greatest error suppression method is proposed where the position of each actuator is decided one by one after each evaluation of the error between the desired subreflector shape and the actual subreflector shape. For the second problem, a mathematical analysis shows that there exists only one optimal configuration. Two optimization techniques are used for the second problem: the simulated annealing algorithm and a simple univariate optimization technique. The univariate technique always generates the same optimal configuration for different initial configurations and it gives the low bound in the evaluation of the error. The simulated annealing algorithm is a stochastic technique used to search for global optimum point. Finally, as an example the results of the proposed optimization techniques are presented for the generation of a subreflector shape corresponding to the geographical outline of Brazil.Index Terms-Active antennas, piezoelectric devices, reconfigurable antennas.

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Section: Discussionmentioning

confidence: 99%

Section: Software and Sensing Systemmentioning

confidence: 99%

Section: ) Optimization Of Actuation Values (Deflections)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design, modeling, and optimization of mechanically reconfigurable aperture antennas

Washington¹,

Yoon²,

Angelino³

et al. 2002

IEEE Trans. Antennas Propagat.

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Smart materials and structures—a finite element approach—an addendum: a bibliography (1997–2002)

Mackerle

2003

Modelling Simul. Mater. Sci. Eng.

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This paper gives a bibliographical review of the finite element methods (FEMs) applied to the analysis and simulation of smart materials and structures. The bibliography is an addendum to the Smart materials and structures—a finite-element approach: a bibliography (1986–1997) published in 1998 Modelling Simul. Mater. Sci. Eng. 6 293–334. The added bibliography at the end of this article contains 977 references to papers and conference proceedings on the subject that were published in 1997–2002. The following topics are included: smart materials, smart components/structures, smart sensors and actuators, and controlled structures technology.

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Structural design and realization of a mechanical reconfigurable antenna

Jiang

Zhou

Wang

et al. 2018

2018 International Conference on Electronics Technology (ICET)

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<title>Reconfigurable contour beam generation using a smart subreflector antenna system</title>

Cited by 3 publications

References 0 publications

Design, modeling, and optimization of mechanically reconfigurable aperture antennas

Design, modeling, and optimization of mechanically reconfigurable aperture antennas

Smart materials and structures—a finite element approach—an addendum: a bibliography (1997–2002)

Structural design and realization of a mechanical reconfigurable antenna

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