TY - GEN
T1 - New technologies for the actuation and control of large aperture lightweight optical quality mirrors
AU - Gullapalli, Sarma N.
AU - Flood, Robert
AU - Yang, Eui Hyeok
AU - Lih, Shyh Shiuh
PY - 2003
Y1 - 2003
N2 - There is a need for ever-larger apertures for use in space based optical imaging systems. The design of such mirrors involves a balance between (a) using lighter face sheet and lighter support structure, which reduces weight but increases the mirror surface deformations due to disturbances, and (b) using more dynamic actuated correction of the increased deformations, which increases weight due to the added actuators. Recent developments such as the ultra lightweight nanolaminate-based optical quality mirror face sheets (-0.2 kg/m? areal density) developed at Lawrence Livermore National Laboratories [2] are dramatically changing this balance in favor of more actuation and control. To realize the full potential of these new ultra lightweight optical quality face sheets, new ultra lightweight large stroke precision actuators need to be developed. This paper presents a set of candidate components: MEMS based large stroke (>l00 microns) ultra lightweight (-0.01 gm) discrete inch worm actuator technology, and a distributed actuator technology, in the context of a novel lightweight active flexure-hinged substrate concept that uses the nanolaminate face sheet [I].
AB - There is a need for ever-larger apertures for use in space based optical imaging systems. The design of such mirrors involves a balance between (a) using lighter face sheet and lighter support structure, which reduces weight but increases the mirror surface deformations due to disturbances, and (b) using more dynamic actuated correction of the increased deformations, which increases weight due to the added actuators. Recent developments such as the ultra lightweight nanolaminate-based optical quality mirror face sheets (-0.2 kg/m? areal density) developed at Lawrence Livermore National Laboratories [2] are dramatically changing this balance in favor of more actuation and control. To realize the full potential of these new ultra lightweight optical quality face sheets, new ultra lightweight large stroke precision actuators need to be developed. This paper presents a set of candidate components: MEMS based large stroke (>l00 microns) ultra lightweight (-0.01 gm) discrete inch worm actuator technology, and a distributed actuator technology, in the context of a novel lightweight active flexure-hinged substrate concept that uses the nanolaminate face sheet [I].
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U2 - 10.1109/AERO.2003.1235103
DO - 10.1109/AERO.2003.1235103
M3 - Conference contribution
AN - SCOPUS:68549128389
SN - 078037651X
SN - 9780780376519
T3 - IEEE Aerospace Conference Proceedings
SP - 1717
EP - 1728
BT - 2003 IEEE Aerospace Conference, Proceedings
T2 - 2003 IEEE Aerospace Conference
Y2 - 8 March 2003 through 15 March 2003
ER -