2026-09-22T08:01:12Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/70635 2023-07-11 col_2142_5131 col_2142_14800 com_2142_5130 com_2142_14799 com_2142_234

1987 1987 Kuznetsov, E.N., Janiszewski, Alan Michael 2014-12-15T23:55:56Z 2014-12-15T23:55:56Z 10000-01-01 The problem of guaranteeing reflector surface precision for large aperture antennas deployed in space has not been completely resolved. This feasibility study advances an approach that represents a fundamental divergence from conventional techniques. Specifically, an underconstrained structural system in the form of a wire mesh Chebyshev net is shaped to the desired reflector geometry. Predicted thermal patterns are applied to this surface and resulting distortions are calculated. A technique for optimally reconfiguring the distorted mesh in terms of RMS surface error is established. This reconfiguration is accomplished using the kinematic mobility inherent to underconstrained systems. Since stretching of the distorted mesh material is not allowed, control load magnitudes can be greatly reduced. An example using electrostatic control force is forwarded. The performance (in the form of antenna gain) for the resulting non-ideal surfaces is examined and is shown to be promising in terms of proposed space technology. Made available in DSpace on 2014-12-15T23:55:56Z (GMT). No. of bitstreams: 1 8803079.pdf: 4085354 bytes, checksum: 6c3e2c9b3e1cbabdfbde1060d32cc123 (MD5) Previous issue date: 1987 Embargo set by: Seth Robbins for item 70801 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 128 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1987. http://hdl.handle.net/2142/70635 (UMI)AAI8803079 Engineering, Aerospace Optimal Reconfiguration of Thermally Distorted Wire Mesh Reflectors for Large Space Antennas text Aeronautical and Astronautical Engineering Aeronautical and Astronautical Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.