Rapid Deformation Calculation for Large Reflector Antennas: A Surrogate Model Method

Zhang, Zihan; Ye, Qian; Fu, Li; Wang, Jinqing; Meng, Guang; Shen, Zhi-Qiang

doi:10.1088/1674-4527/ac9f06

Cited by 3 publications

(3 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…By using diferent surrogate model functions, the relationship between input variable x and output y response can be approximated as follows [34]:…”

Section: Multiobjective Optimization Methods For the Mixed Surrogate ...mentioning

confidence: 99%

Multiobjective Optimization of Composite Material Seat Plate for Mortar Based on the Hybrid Surrogate Model

Wang,

Xu,

2024

Shock and Vibration

View full text Add to dashboard Cite

As an important force transmission component of mortars, the seat plate affects some core indicators of mortars such as range, shooting accuracy, and maneuverability. In order to withstand huge impact loads, the seat plate was previously made of metal, which accounts for approximately 30%–45% of the total weight of the gun. The drawbacks of the heavy weight of the seat plate, which are not conducive to transportation and transfer, run counter to the current direction of the mortar’s lightweight development. The application of composite materials can greatly reduce the weight of the seat plate, but it exacerbates the contradiction between the mobility and combat effectiveness of mortars. In order to achieve the best match between mortar stability and maneuverability, a multiobjective optimization of composite material layers for seat plates is proposed, utilizing the designability of composite material layers. First, a fiber continuity model based on dropout sequence is adopted to solve the problems existing in the design of inherent continuity classes for composite layered fibers. Second, a hybrid surrogate model that considers the composite material seat plate quality, structural strength, shooting stability, shooting accuracy, and various working conditions is considered. Then, in order to improve the optimization efficiency and robustness of the algorithm, a multiobjective optimization algorithm based on the Chebyshev combination pattern is used to solve the mixed surrogate model. Finally, the optimization results are comprehensively evaluated against the optimization objectives. Research has shown that the method proposed in this article can effectively solve the time-consuming problem of multiobjective optimization, improve the accuracy of hybrid surrogate models, and meet the expected requirements of multiobjective optimization of composite material seat plates. While ensuring shooting stability, the weight of the seat plate is reduced by 18.43% compared to the metal seat plate, which has important application value for lightweight design of mortars.

show abstract

“…By using diferent surrogate model functions, the relationship between input variable x and output y response can be approximated as follows [34]:…”

Section: Multiobjective Optimization Methods For the Mixed Surrogate ...mentioning

confidence: 99%

Multiobjective Optimization of Composite Material Seat Plate for Mortar Based on the Hybrid Surrogate Model

Wang,

Xu,

2024

Shock and Vibration

View full text Add to dashboard Cite

show abstract

“…where f is the focal length; in most of the literatures, the XYZcoordinate system is adopted as the reference coordinate system for calculating the surface errors (Fu et al 2022;Zhang et al 2023). The BFP coordinate system (denoted by the UVW-coordinate system) in Figure 4 is used to calculate the OPD and simulate the radiation pattern.…”

Section: The Best-fit Paraboloidmentioning

confidence: 99%

“…The temperature distribution of the antenna is hard to obtain, and it takes a long time for the FE simulation tool to carry out FE modeling and postprocessing. To address these limitations, Zhang et al (2023) presented a surrogate model based on extreme gradient boosting (XGBoost) and deep convolutional neural networks (CNN) to get the deformation distribution of the primary reflector quickly. Fu et al (2022) considered the displacement of the secondary reflector under gravitational load, and proposed a measurement method for the deformation distribution of the primary reflector and the displacement of the secondary reflector for a 70 m antenna at different zenith angles (ZAs) by laser scanner.…”

Section: Introductionmentioning

confidence: 99%

A Quick Calculation Method for Radiation Pattern of Submillimeter Telescope with Deformation and Displacement

You,

Yao,

Wang

2024

Res. Astron. Astrophys.

View full text Add to dashboard Cite

Radiation pattern captures the electromagnetic performance of reflector antennas, which is significantly affected by the deformation of the primary reflector due to gravity and the displacement of the secondary reflector. During the design process of large reflector antennas, a substantial amount of time is often dedicated to iteratively adjusting structural parameters and validating electromagnetic performance. To improve the efficiency of the de- sign process, we first propose an approximate calculation method of optical path difference (OPD) for the deformation of the primary reflector under gravity and the displacement of the secondary reflector. Then an OPD fitting function based on the modified Zernike poly- nomials is proposed to capture the phase difference of radiation over the aperture plane, based on which the radiation pattern will be obtained quickly by the aperture field integration method. Numerical experiments demonstrate the effectiveness of the proposed quick calcula- tion method for analyzing the radiation pattern of a 10.4-m submillimeter telescope antenna at its highest operating frequency of 856 GHz. In comparison with the numerical simula- tion method based on GRASP (which is an antenna electromagnetic analysis tool combining physical optics (PO) and physical theory of diffraction (PTD)), the quick calculation method reduces the time for radiation pattern analysis from more than one hour to less than two min- utes. Furthermore, the quick calculation method exhibits excellent accuracy for the figure of merit (FOM) of the radiation pattern. Therefore, the proposed quick calculation method can obtain the radiation pattern with high speed and accuracy. Compared to the time-consuming numerical simulation method (PO and PTD), it can be employed for quick analysis of the radiation pattern for the lateral displacement of the secondary reflector and the deformation of the primary reflector under gravity in the design process of the reflector antenna.

show abstract

High- accuracy chaotic time series prediction of the flexible beam-ring model based on P$$\_$$CNN-BiLSTM ED network

Liu,

Sun,

Wang

et al. 2024

Eur. Phys. J. Spec. Top.

View full text Add to dashboard Cite

Rapid Deformation Calculation for Large Reflector Antennas: A Surrogate Model Method

Cited by 3 publications

References 44 publications

Multiobjective Optimization of Composite Material Seat Plate for Mortar Based on the Hybrid Surrogate Model

Multiobjective Optimization of Composite Material Seat Plate for Mortar Based on the Hybrid Surrogate Model

A Quick Calculation Method for Radiation Pattern of Submillimeter Telescope with Deformation and Displacement

High- accuracy chaotic time series prediction of the flexible beam-ring model based on P$$\_$$CNN-BiLSTM ED network

Contact Info

Product

Resources

About