On the shape of mating edges of the central and peripheral panels of the folding precision parabolic antenna mirror

Structural gaps between joining edges of the folding parabolic antenna mirror panels inevitably lead to the radio emission penetration from its rear half-space and to a decrease in the surface utilization coefficient, which requires introduction of the special protective devices. Therefore, one of the important requirements to the folding precision parabolic antenna mirrors lies in ensuring a minimum gap between the mating edges of the central and peripheral panels after deployment. The paper proposes a method to determine geometric parameters of the mating edges of the central and peripheral panels using the spherical opening mechanism. The resulting shape of the mating edges reduces the gap between them by ensuring their mutual sliding during opening and mating. Based on the proposed method, a control program was developed for the three-axis longitudinal milling boring machine 6M616 with the CNC. The program made it possible to automate the marking processes on the form-forming surfaces of matrices of the contour lines of the mating edges with the central and peripheral large-sized panels and direct machining of the mating edges on their workpieces.
Keywords: folding antennas, rigid panels, second-order surface, mating edges shape
EDN: NLSBKE, https://elibrary/nlsbke

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