Tolerance Modeling and Analysis Considering Form Defects for Spaceborne Array Antenna

Sa, Guodong; Liu, Zhenyu; Qiu, Chao; Tan, Jianrong

doi:10.3390/app10082840

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…Military applications have an increasingly higher detection power of APAA, so it is necessary to study the SET coupling. Numerous research studies have been devoted to the performance assurance of APAA on various platforms under a certain service loading [13][14][15][16][17][18]. Meanwhile, relevant experimental verifcation has been conducted and remarkable results have been achieved.…”

Section: Introductionmentioning

confidence: 99%

Structural-Electromagnetic-Thermal Coupling Technology for Active Phased Array Antenna

Wang

et al. 2023

International Journal of Antennas and Propagation

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Active phased array antenna (APAA) is a representative of complex electronic equipment, and it plays significant roles in scenarios such as battlefield situation perception, aviation guidance, and communication. It has become the core equipment in land, navigation, and aeronautical applications. With the continuous improvement of technical changes and military requirements, the working frequency band, pointing accuracy, gain, and low sidelobe level of APAA increase, and the multi-disciplinary design contradiction between antenna electrical performance and structure and temperature becomes increasingly prominent. As a result, the electrical performance of APAA in service is prone to be affected by the external complex environments. The structural-electromagnetic-thermal (SET) coupling problem has become a key problem restricting the development of APAA. This paper has summarized the structural features and environmental loads of advanced APAA on different platforms and provided design basis and principle for antenna designer. And then the SET coupling theory of APAA has been introduced, which can be applied in both the design and manufacturing stage, as well as the performance control technology in service environment of APAA. This theory helps to analyze the impact of environmental factors, such as antenna structure deformation, radome high-temperature ablation, and feed errors, on the antenna's performance. For 128 × 768 spaceborne array antenna, in the range of 25∼85°C, the gain of antenna decreases with the increase of operating temperature and decreases by 0.015 dB with each increase of 1°C. The key design parameters in the fields of antenna manufacturing accuracy, efficient heat dissipation, and lightweight design are also analysed; for 32 × 32 rectangular planar phased array antenna, the gain of antenna decreases by 2.715 dB when the random error of installation position in x, y, and z direction reaches 1/10 of the wavelength. In addition, condition monitoring, displacement field reconstruction, and electrical performance compensation of APAA have also been touched to help engineers maintain and guarantee the antenna performance throughout its life cycle. Finally, the future research direction of SET technology of APAA has been discussed, and SET technology is extended to more fields such as antenna parameter uncertainty, high-frequency circuit electronics manufacturing, and electronic equipment performance guarantee.

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Section: Introductionmentioning

confidence: 99%

Structural-Electromagnetic-Thermal Coupling Technology for Active Phased Array Antenna

Wang

et al. 2023

International Journal of Antennas and Propagation

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“…Yi et al (2021) proposed a progressive rigid assembly method to obtain the position error of key mating surfaces by the three-point contact principle. Sa et al (2020) fulfilled the rigid assembly of an X-band spaceborne active-phased array antenna based on the B-spline surface. However, all the above assembly simulation methods are based on the rigid body assumption, and the deformation of parts with specific properties (such as elastic modulus and Poisson’s ratio, etc.)…”

Section: Introductionmentioning

confidence: 99%

A tolerance analysis method based on assembly deformation simulation with stable contact

Sa,

Bai,

Liu

et al. 2023

RIA

Self Cite

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Purpose The assembly simulation in tolerance analysis is one of the most important steps for the tolerance design of mechanical products. However, most assembly simulation methods are based on the rigid body assumption, and those assembly simulation methods considering deformation have a poor efficiency. This paper aims to propose a novel efficient and precise tolerance analysis method based on stable contact to improve the efficiency and reliability of assembly deformation simulation. Design/methodology/approach The proposed method comprehensively considers the initial rigid assembly state, the assembly deformation and the stability examination of assembly simulation to improve the reliability of tolerance analysis results. The assembly deformation of mating surfaces was first calculated based on the boundary element method with optimal initial assembly state, then the stability of assembly simulation results was assessed by the density-based spatial clustering of applications with noise algorithm to improve the reliability of tolerance analysis. Finally, combining the small displacement torsor theory, the tolerance scheme was statistically analyzed based on sufficient samples. Findings A case study of a guide rail model demonstrated the efficiency and effectiveness of the proposed method. Research limitations/implications The present study only considered the form error when generating the skin model shape, and the waviness and the roughness of the matching surface were not considered. Originality/value To the best of the authors’ knowledge, the proposed method is original in the assembly simulation considering stable contact, which can effectively ensure the reliability of the assembly simulation while taking into account the computational efficiency.

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CAD-Based Methods for the Modeling of Planar Parts Assemblies with Flatness Defects

Korbi,

Gharbi,

Bahloul

et al. 2024

Lecture Notes in Mechanical Engineering

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Tolerance Modeling and Analysis Considering Form Defects for Spaceborne Array Antenna

Cited by 4 publications

References 27 publications

Structural-Electromagnetic-Thermal Coupling Technology for Active Phased Array Antenna

Structural-Electromagnetic-Thermal Coupling Technology for Active Phased Array Antenna

A tolerance analysis method based on assembly deformation simulation with stable contact

CAD-Based Methods for the Modeling of Planar Parts Assemblies with Flatness Defects

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