ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Reconfigurable wire⁃driven parallel support mechanism for electromagnetic scattering test
Received date: 2023-03-07
Revised date: 2023-04-17
Accepted date: 2023-05-15
Online published: 2023-12-18
Supported by
National Natural Science Foundation of China(12072304)
In view of the requirement that the rolling attitude of the object needs to be changed in the electromagnetic scattering test， a design scheme of a reconfigurable wire-driven parallel support mechanism is proposed， which can meet the test requirements in full rolling scanning and other attitudes. Its feasibility is theoretically analyzed and experimentally demonstrated. A reconfiguration strategy with a double rotary mechanism is used to construct a reconfigurable wire-driven parallel support mechanism， and the kinematic and static model of the mechanism is derived. Based on the structure matrix of the mechanism， the force closure workspace is solved using the Monte-Carlo method to calculate the attitude workspace for the design parameters. The variation pattern of cable length and the variation characteristics of wire tension are further analyzed for the two composite attitudes motion states of full rolling and pitching， full rolling and pitching and yawing of the target. Further， the electromagnetic scattering characteristics of the foam turntable support and wire structure are tested and analyzed. Finally， a comparative analysis of the radar scattering cross section of an aircraft target supported by the foam turntable support and by the wire-driven parallel support mechanism is carried out. The results indicate that the mechanism proposed shows good low scattering characteristics at 8~12 GHz frequency band. With the two support methods， the absolute value of the test error of the radar cross section of the aircraft target is less than 1 dBsm， and the relative error is between ±10%. The mechanism proposed can expand the ability of electromagnetic scattering test， and has a good prospect in engineering application.
Ting LIU , Qi LIN , Zhen LIU , Xiaoguang WANG , Huisong WU , Yonggang XU . Reconfigurable wire⁃driven parallel support mechanism for electromagnetic scattering test[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2024 , 45(2) : 328658 -328658 . DOI: 10.7527/S1000-6893.2024.28658
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