Transactions of Nanjing University of Aeronautics & Astronautics
Design and Mechanical Characteristics of Support Structure for Modular Deployable Antenna
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Abstract:
A new configuration of support structure for modular space deployable antenna is proposed， and its mechanical characteristics are studied to meet the urgent needs of large-scale， high-precision， and high-rigidity development of space deployable antenna. On the basis of the basic theory of mechanism， the overall scheme design and detailed design of support structure are developed， and a 3-D model of modular deployable antenna consisting of 19 hexagonal prism modules is established. In accordance with strut stability theory， a static analysis model of support structure is established， and the value range of pretightening force in cables is obtained. A dynamic analysis model of the antenna structure is established， and the modal analysis is conducted. The natural frequency influencing factors and sensitivity analysis are performed. A principle prototype of support structure is developed， and the deployment function test and verification are conducted. Results show that the pretightening cables have a great influence on the structural stiffness， and the structural stiffness is increased by about 2.01 times after the pretightening cables are deployed. The natural frequency is sensitive to the material density and elastic modulus of members and the size parameters of chord beams and diagonal beams. The developed principle prototype in this paper is deployed smoothly and gently， verifying the feasibility of the structural design. Research results provide theoretical reference and technical support for the basic research and engineering application of modular deployable antenna.
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This work was supported by the Key Program of National Natural Science Foundation of China （No.51835002）， the Key Laboratory of Vibration and Control of Aero-propulsion System， Ministry of Education， Northeastern University （No.VCAME202207）， the China Postdoctoral Science Foundation （No.2019M661126）， the Natural Science Foundation of Liaoning Province （No.2022-MS-278）， and the Foundation of Liaoning Education Department （No.LJKZ0563）.
Clc Number:
V443.4
CHINA AERO-SCIENCES
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