Title: A 'Kane's Dynamics' model for the Active Rack Isolation System. Part 2: non-linear model development, verification and simplification

Authors: R. David Hampton, Geoffrey S. Beech, Nagendra N. Subba Rao, Jason K. Rupert, Young K. Kim

Addresses: Civil and Mechanical Engineering Department, US Military Academy, West Point, New York 10996, USA. ' Vehicle Analysis Branch (Mail Stop: EV12), Spacecraft and Vehicle Systems Department, NASA Marshall Space Flight Center, Huntsville, Alabama 35812, USA. ' Japan-228-001, Kanagawa Ken, Zama Shi, Sagamigaoka-1-34-20, Granero Yosiyama-201, Japan. ' Simulation and Analysis Section, Missile and Aviation Systems Department, Dynetics, Inc., 1000 Explorer Boulevard, Huntsville, Alabama 35806, USA. ' Control Systems Design and Analysis Branch (Mail Stop: EV41), Flight Mechanics and Analysis Division, NASA Marshall Space Flight Center, Huntsville, Alabama 35812, USA

Abstract: Boeing|s Active Rack Isolation System (ARIS) isolates microgravity space-science experiments on the International Space Station (ISS) against station-induced disturbances, at the level of the International Standard Payload Rack (ISPR). Part 1 of this documentation presented a linearised model of ARIS, hand-developed via Kane|s method. Part 2, below, reports the use of software packages to develop and verify a corresponding non-linear model, without umbilicals. The model is first verified against a |truth| model, then linearised to match the model of Part 1, and finally simplified using reasonable negligible-inertia assumptions. The resulting models all show nearly identical, and physically reasonable, dynamical responses.

Keywords: simulation; Kane|s dynamics; microgravity; international space station; ISS; active rack isolation system; Boeing; international standard payload rack; ARIS; nonlinear modelling.

DOI: 10.1504/IJVSMT.2007.016236

International Journal of Vehicle Systems Modelling and Testing, 2007 Vol.2 No.3, pp.227 - 251

Published online: 11 Dec 2007 *

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