scholarly journals Robust Design of 3D-Printed 6–18 GHz Double-Ridged TEM Horn Antenna

2018 ◽  
Vol 8 (9) ◽  
pp. 1582 ◽  
Author(s):  
Sungwoo Lee ◽  
Youngoo Yang ◽  
Kang-Yoon Lee ◽  
Kyung-Young Jung ◽  
Keum Hwang
Keyword(s):  
Reflection Coefficient ◽  
Robust Design ◽  
Design Method ◽  
Horn Antenna ◽  
Initial Design ◽  
3D Printed ◽  
Tem Horn ◽  
Robust Design Method ◽  
Noise Factors ◽  
Ridged Waveguide

A robust design of a 3D-printed 6–18 GHz double-ridged TEM horn antenna is proposed in this paper. The designed TEM horn antenna has two parts: an adaptor and a horn aperture. The adaptor is realized using a double-ridged waveguide to extend the operating bandwidth of the dominant mode (TE10 mode). Meanwhile, the horn aperture section is implemented in an exponentially tapered configuration to match the impedance of the double-ridged waveguide with the intrinsic impedance. The performance of the initially designed antenna shows that the reflection coefficient and gain levels are less than −13 dB and greater than 5.5 dBi within the 6–18 GHz band, respectively. The initial design was well done, but the noise factors that may occur during the manufacturing process were not taken into account. To design an antenna considering these noise factors, the parameters of the initial design are optimized by a novel robust design method also proposed in this paper. The robustness of the antenna optimized by the proposed method is approximately 12.4% higher than that of the initial antenna. The validity of the proposed method was tested by fabricating the antenna. A prototype of the optimized antenna with the proposed robust design method is fabricated using a 3D printer with a stereolithographic apparatus attached, and the surface of the frame is covered by a nano-silver plating. The measured results of the fabricated antenna are in good agreement with the simulation results over the operating band. The measured −10 dB reflection coefficient bandwidth of the antenna can cover 6–18 GHz. In addition, the measured gain ranges from 4.42 to 10.75 dBi within the 6–18 GHz band.

Seat/Head Restraint System Robust Design for IIHS Rear Impact

2007 ◽  
Author(s):  
Yan Fu ◽  
T. C. Weng
Keyword(s):  
Robust Design ◽  
Design Method ◽  
Stability Control ◽  
Restraint System ◽  
Variable Screening ◽  
Head Restraint ◽  
Rear Impact ◽  
Robust Design Method ◽  
Noise Factors ◽  
Good Rating

The Insurance Institute for Highway Safety (IIHS) announced the procedures to evaluate and rate rear crash protection system, which focus on how well seat/head restraint system protects against soft tissue neck (“whiplash”) injury. The “Good” rating for IIHS rear impact combining with the “Good” ratings of both frontal offset and side impacts, plus offering electronic stability control will earn the Institute’s “Top Safety Pick” award. The goal of this work is to develop an analytical and efficient way to assist engineers in analyzing the design variables of the seat/head restraint system to improve the IIHS rear impact rating. An integrated robust design method for IIHS rear impact is developed using design of experiments, variable screening, response surface method, and genetic algorithm. A CAE simulation model with Bio-RID dummy is built to correlate to rear impact sled tests. The correlated model is then used in the robust design study to identify design strategy and obtain robust design to maximize the chance of achieving IIHS rear impact “Good” rating. The proposed robust design method is applied to a manual seat/head restraint system to achieve robust design under various noise factors. The results demonstrate that the integrated robust design method is a useful tool to improve the seat and head restraint system design to improve IIHS rear impact rating.

scholarly journals Novel Robust Design Method of Multilayer Optical Coatings

ISRN Optics ◽  
2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Suyong Wu ◽  
Xingwu Long ◽  
Kaiyong Yang
Keyword(s):  
Robust Design ◽  
Optimization Design ◽  
Design Method ◽  
Analytical Calculation ◽  
Design Procedure ◽  
Deposition Process ◽  
Practical Significance ◽  
Optical Coatings ◽  
Optical Films ◽  
Robust Design Method

We present a novel fast robust design method of multilayer optical coatings. The sensitivity of optical films to production errors is controlled in the whole optimization design procedure. We derive an analytical calculation model for fast robust design of multilayer optical coatings. We demonstrate its effectiveness by successful application of the robust design method to a neutral beam splitter. It is showed that the novel robust design method owns an inherent fast computation characteristic and the designed film is insensitive to the monitoring thickness errors in deposition process. This method is especially of practical significance to improve the mass production yields and repetitive production of high-quality optical coatings.

Robust Layout Synthesis of a MEM Crab-Leg Resonator Using a Constrained Genetic Algorithm

2007 ◽  
Author(s):  
Zhun Fan ◽  
Sofiane Achiche
Keyword(s):  
Genetic Algorithm ◽  
Robust Design ◽  
Optimization Problem ◽  
Design Method ◽  
Research Work ◽  
Constrained Optimization Problem ◽  
Geometric Uncertainties ◽  
Layout Synthesis ◽  
Target Performance ◽  
Robust Design Method

The research work carried out in this paper introduces a robust design method for layout synthesis of MEM resonator subject to inherent geometric uncertainties such as the fabrication error on the sidewall of the structure. The robust design problem is formulated as a multi-objective constrained optimization problem with certain assumptions and treated by a special constrained genetic algorithm. The MEM design used for validation is a crab-leg resonator taken from the literature. The results show that the approach proposed in this research can lead to design results that meet the target performance and are less sensitive to geometric uncertainties than typical designs.

Robust Design Method of Multilayer Antireflection Coating for Organic Solar Cells

2013 ◽  
Vol E96.C (4) ◽  
pp. 604-611 ◽  
Author(s):  
Shigeru KUBOTA ◽  
Kensaku KANOMATA ◽  
Katsuaki MOMIYAMA ◽  
Takahiko SUZUKI ◽  
Fumihiko HIROSE
Keyword(s):  
Solar Cells ◽  
Robust Design ◽  
Organic Solar Cells ◽  
Design Method ◽  
Antireflection Coating ◽  
Robust Design Method

scholarly journals Robust optimization design of structures based on the specular reflection algorithm

2019 ◽  
Vol 11 (3) ◽  
pp. 168781401983413
Author(s):  
Qisong Qi ◽  
Qing Dong ◽  
Yunsheng Xin
Keyword(s):  
Robust Design ◽  
Structural Design ◽  
Optimization Design ◽  
Design Method ◽  
Specular Reflection ◽  
Design Parameters ◽  
Theoretical Design ◽  
Recent Advancement ◽  
Robust Optimization Design ◽  
Robust Design Method

The nominal values of structural design parameters are usually calculated using a traditional deterministic optimization design method. However, owing to the failure of this type of method to consider potential variations in design parameters, the theoretical design results can be far from reality. To address this problem, the specular reflection algorithm, a recent advancement in intelligence optimization, is used in conjunction with a robust design method based on sensitivity. This method not only is able to fully consider the influence of parameter uncertainty on the design results but also has strong applicability. The effectiveness of the proposed method is verified by numerical examples, and the results show that the robust design method can significantly improve the reliability of the structure.

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