电磁散射测试的可重构绳系并联支撑机构

doi:10.7527/S1000-6893.2023.28658

Abstract

Abstract: In view of the test requirements for electromagnetic scattering test where the rolling attitude of the object needs to be changed, a design scheme of a reconfigurable cable-driven parallel support mechanism is proposed which can meet the requirements of full rolling scanning and other attitude testing simultaneously, and its feasibility is theoreti-cally analyzed and experimentally demonstrated. A reconfiguration strategy with a double rotary mechanism is used to construct a reconfigurable cable-driven parallel support mechanism and the kinematic and static model of the reconfigurable cable-driven parallel support 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 de-sign parameters. The variation pattern of cable length and the variation characteristics of cable 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 cable structure are tested and analyzed separately. Finally, a comparative analysis of the radar scattering cross section of a aircraft target both on a foam turntable support and supported by the cable-driven parallel support mechanism is carried out. The results indicate that the reconfigurable cable-driven parallel support mechanism shows good low scattering characteristics at 8~ 12 GHz frequency band. Under the two support methods, the absolute value of the test error of aircraft target radar cross section is less than 1dbsm, and the relative error is between ±10%. The reconfigurable cable-driven parallel support mechanism can expand the ability of electromagnetic scattering test, and has a good prospect of engineering application.

Key words: Cable-driven parallel mechanism, target test support mechanism, workspace, scattering measurement, elec-tromagnetic scattering characteristics

CLC Number:

V219
TP242.3

References

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Reconfigurable cable-driven parallel support mechanism for electromag-netic scattering test

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