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Design and Analysis of High Precision OPTO-Mechanical System for Space Application


Tejaswini K. H. , DONBOSCO INSTITUTE OF TECHNOLOGY; Dr. V. S. Ramamurthy, DONBOSCO INSTITUTE OF TECHNOLOGY; A. K. Sharma, Laboratory for Electro-Optics systems - Indian Space Research Organisation


Opto-Mechanical, Star Sensor, Quasi-Static, Von-Mises, Aluminum 6061, Localized Stress, Deflection


Star sensor is one of the Opto-Mechanical systems. Star tracker/ Star Sensor is an aerospace navigation instrument used to provide absolute 3-axis attitude information to the spacecraft. A “Lost–in-space” case may develop if there is no accurate attitude determination. Hence there is a requirement attitude determination device of maximized accuracy, reliability, life time and optimized mass, size and cost. A wide variety of attitude sensor exists but this is a new design of Opto-Mechanical system. Star sensors have numerous advantageous over other attitude detectors because of their ability to provide 3 axis orientation information with high accuracy. Star sensors are the most accurate attitude determining devices. Finite Element Method is used to analyze Opto-Mechanical System which is a part of navigation system. This assembly is analyzed for mechanical loading. Star Sensor is analyzed for 4 mechanical load cases. Geometry and loading are specified by LEOS (ISRO). The displacement and Von-Mises stresses are presented. UG NX 7.5 is used for CAD modeling and Analysis. Maximum stresses are observed at the bolt locations (localized stresses) and can be neglected.

Other Details

Paper ID: IJSRDV4I50361
Published in: Volume : 4, Issue : 5
Publication Date: 01/08/2016
Page(s): 524-527

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