A 'Kane's dynamics' model for the active rack isolation system. Part four: a model for optimal controller design
by R. David Hampton, Naveed Quraishi, Geoffrey S. Beech
International Journal of Vehicle Systems Modelling and Testing (IJVSMT), Vol. 4, No. 1/2, 2009

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 reported the use of software packages to develop and verify a corresponding non-linear model, without umbilicals. Part 3 documented the augmentation of the non-linear model with an arbitrary number of umbilicals, with specified arbitrary attachment points, and arbitrary (parallel) stiffnesses and dampings. Part 4 reviews the general model-development procedure; reports on the reformulation of the model into a standard, linearised, input-coupled, state-space (descriptor) form, with all bias-force and -moment terms removed; summarises the significant features of the completed model; and discusses its possible uses in support of future microgravity vibration-isolation efforts.

Online publication date: Sun, 08-Nov-2009

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