Computer Science
Scientific paper
Feb 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989itns...36..903s&link_type=abstract
(IEEE, DOE, NIST, et al., 1988 Nuclear Science Symposium, Orlando, FL, Nov. 9-11, 1988) IEEE Transactions on Nuclear Science (IS
Computer Science
1
Mirrors, Prototypes, Space Infrared Telescope Facility, Systems Engineering, Assembling, Component Reliability, Liquid Helium, Pointing Control Systems, Servocontrol, Spacecraft Reliability
Scientific paper
The authors describe the design of a liquid helium temperature prototype secondary mirror assembly (PSMA) under developement for the NASA Space Infrared Telescope Facility (SIRTF) program. The SIRTF secondary mirror assembly must operate below 4 K and provide highly precise two-axis dynamic tilting (chopping) in addition to the conventional functions needed by the SIRTF observatory. The PSMA design uses a fused quartz mirror kinematically attached at its center to an aluminum cruciform. The mirror/cruciform assembly is driven in tilt about its combined center of mass using a unique flexure pivot and a four-actuator control system with feedback provided by pairs of differential position sensors. The voice coil actuators are mounted on a second flexture-pivoted mass, enhancing servo system stability and isolating the telescope from vibration-induced disturbances. The mirror/cruciform and the reaction mass are attached to opposite sides of an aluminum mounting plate whose dimensional characteristics are nominally identical to those of the aluminum flexure pivot material. The mounting plate is connected to the outer housing by a six-degree-of-freedom focus and centering mechanism using pivoted actuation levers driven by lead screw/harmonic drive/stepper motor assemblies.
Duffy Michelle
Gullapalli S.
Rockwell Richard R.
Sileo F.
Stier Martin
No associations
LandOfFree
Prototype secondary mirror assembly design for the space infrared telescope facility does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Prototype secondary mirror assembly design for the space infrared telescope facility, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Prototype secondary mirror assembly design for the space infrared telescope facility will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1884872