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Title: Actuator grouping optimization on flexible space reflectors
Authors: Hill, Jeffrey R.
Wang, K. W.
Fang, Houfei
Quijano, Ubaldo
Keywords: shape control
en masse elimination (EME) algorithm
grouping optimization
Issue Date: 11-Mar-2011
Publisher: Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2011
Citation: 2011 Smart Structures/NDE, San Diego, CA, March 11-15, 2011
Abstract: With the rapid advances in deployable membrane and mesh antenna technologies, the feasibility of developing large, lightweight reflectors has greatly improved. In order to achieve the required surface accuracy, precision surface control is needed on these lightweight reflectors. For this study, an analytical model is shown which combines a flexible Kapton reflector with Polyvinylidene fluoride (PVDF) actuators for surface control. Surface errors are introduced that are similar to real world scenarios, and a least squares control algorithm is developed for surface control. Experimental results on a 2.4 meter reflector show that while the analytical reflector model is generally correct, due to idiosyncrasies in the reflector it cannot be used for online control. A new method called the En Mass Elimination algorithm is used to determine the optimal grouping of actuators when the number of actuators in the system exceeds the number of power supplies available.
Appears in Collections:JPL TRS 1992+

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