Membrane Reflector Shape Control Using a Bio-Inspired MRF-Foam Actuator

Christopher Jenkins, Jamie LaRocque, Kyeongsik Woo, Edward Meehan, Chad Wentling
2010 51st AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference 18th AIAA/ASME/AHS Adaptive Structures Conference 12th   unpublished
In this paper we discuss a prototype ultra-lightweight membrane mirror based upon a previously developed linear peristaltic actuator (LPA). The LPA, consisting of an open-cell polymer foam substrate infused with magneto-rheological fluid (MRF), was inspired by the paradigm of peristalsis in nature. The prototype ultra-lightweight mirror consists of an opencell polymer foam substrate infused with MRF. To one side of the foam substrate resides several magnets, such that the surface figure of the
more » ... irror can be controlled by the magnetic field generated. To the other side of foam substrate there is applied a reflective surface. Experimental results for both magnetic field characterization and surface figure are discussed. The magnetic field is well-behaved and attenuates quickly outside of the magnetic actuator body..Mirror surface deformation is significant and correlates well with the magnetic field density.
doi:10.2514/6.2010-2910 fatcat:kgazm3l37rcvdg4pywsr7vruhi