【title】：Mechanical and thermal disturbances of the PSR moderate focus-mission structureMechanical and thermal disturbances of the PSR moderate focus-mission structure
【Author】：Choon-Foo Shih, Jet Propulsion Lab., Pasadena, CA, USA; Michael C. Lou, Jet Propulsion Lab., Pasadena, CA, USA.
【Keyworsd】：
【Page】：pp.81-90【PAPER】：【Volume Num】：1532【Volume Name】：Analysis of Optical Structures【File Size】：919K
【From】：Editor(s): Donald C. O'Shea, Georgia Institute of Technology, Atlanta, GA, USA.ISBN: 0-8194-0660-0, 280 pages Published 1991 Meeting Date: 07/21/91, San Diego, CA, USA
【Abstract】：The primary objective of this paper is to evaluate the optical pointing performance of the PSR Moderate Focus-Mission Structure when subjected to both mechanical and thermal disturbances. The mechanical disturbances are based on secondary mirror chopping. Results indicate that dynamic responses of the primary reflector and the secondary reflector subjected to chopping disturbances of the secondary reflector about its center of mass are within the figure maintenance control capabilities. The effects of modal damping, truss-type secondary support, interface boundary constraints, and alternate configurations are also evaluated in the analysis. Thermal distortions of the structure are evaluated based on the on-orbit temperature profiles derived from the submillimeter telescope missions. Results from thermal deformation analysis indicate the figure initialization control is needed for the PSR Moderate Focus- Mission. However, a figure maintenance system may not be required if adequate thermal isolation is incorporated into the support truss design for the PSR Moderate Focus-Mission Structure.
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