Linking the gyroscope to the imager's optical axis and the laser in finite element optomechanical models

Alson E. Hatheway

doi:10.1117/12.884551

13 May 2011 Linking the gyroscope to the imager's optical axis and the laser in finite element optomechanical models

Alson E. Hatheway

Proceedings Volume 8052, Acquisition, Tracking, Pointing, and Laser Systems Technologies XXV; 80520L (2011) https://doi.org/10.1117/12.884551
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States

Abstract

Control systems engineers are good at controlling the axis of a gyroscope but that is not quite the same thing as controlling the lines of sight of the optical instruments. That difference often remains a large (and uneasy) uncertainty until the system is actually built and tested. This paper describes how the author couples the optical lines of sight (imaging and non-imaging) to the control system's sensors (gyroscopes and accelerometers) using the optical prescription data and the stiffness, mass and damping matrices of a proposed structure. The mechanical engineer is then able to iterate and optimize the structural design in a finite element modeler/analyzer (Patran/Nastran, for instance) to minimize the errors between the control system's sensors and the optical lines of sight. The engineer then includes the optical lines of sight in the transfer functions and eigenvectors that he passes to the control systems engineer for his design of the control systems. The author illustrates his method with an example from his recent practice.

Citation Download Citation

Alson E. Hatheway "Linking the gyroscope to the imager's optical axis and the laser in finite element optomechanical models", Proc. SPIE 8052, Acquisition, Tracking, Pointing, and Laser Systems Technologies XXV, 80520L (13 May 2011); https://doi.org/10.1117/12.884551

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