Design, Development and Analysis of Payload Fixation Device for Space Optical Payload

Abstract

Launch environment is a major design driver in structural design of space com-ponents. Launch survival is often a more dicult design problem than is ensuringoperational performance in orbit. Either the dynamic launch loads experienced bythe components must be reduced or the structure must be stiened. Stiening thestructure adds weight, but reducing the dynamic loads on such components allowslighter weight systems.The purpose of a payload xation device (PFD) is to attach the payload at thespacecraft interface in such a way to minimize launch loads, thermal stresses andassembly stresses transferred to the payload. The design should also provide ease formanufacturing, assembly and testing of the payload and ensure high reliability, as thepayload has to withstand in-orbit space environment.Completing the design with a desired functional performance in multidisciplinaryenvironment is a herculean task. This dissertation dwells into similar challenge doingdesign and development of the PFD for the Limb Viewing Hyper Spectral Imager(LiV-HySI) payload proposed by ISRO in the experimental satellite called YOUTH-SAT. The work focuses on conceptual design, development and analysis of PFD forLiV-HySI payload using the state of the art CAD based FEM techniques. To validatethe FE analysis, the PFD has been fabricated from space qualied material using pre-cision milling machines and has been tested on the vibration-shaker.