NASA 1999 SBIR Phase I


 

PROPOSAL NUMBER 99-1 16.01-2786 (Chron: 991853 )

PROJECT TITLE

High-Accuracy 200 mm Siderostat


TECHNICAL ABSTRACT (LIMIT 200 WORDS)

The proposed innovations are major improvements to existing fine-steering mirror (FSM) actuator and sensor technology for NASA applications such as ST-3 and SIM. Mass of the FSM mechanism is reduced by up to 25%. Simultaneous improvements in power consumption and lateral load capability are also featured. The first innovation involves the use of LHDC's efficient CS actuator technology for FSM actuation. Innovation #2 is the incorporation of advanced sensors having increased accuracy. The result is reduced mass, acceleration, and power as well as the improved accuracy of interferometric and optical encoder sensors without compromise to mirror surface figure quality.

Benefits for JPL's ST-3 program include: improved global and small-range accuracy, lower cost than previous FSM, lower mass for lower launch costs and a simpler support structure. Line-of-sight stabilization can be done with only a few mW of actuator power and it can be launched without a mechanical caging mechanism for increased reliability. Additional benefits for other space-based applications include: extended travel, chopping or dither functions can be performed at higher frequencies and larger amplitudes with lower power for improved images.


POTENTIAL COMMERCIAL APPLICATIONS

Although designed for JPLís ST-3 mission, primary applications of the FO150-35-FS also include space-based imaging and spectrometry missions. In the near term, JPLís DS4/Champollion program and JSCís program to replace the Space Transprtation Systemís (STS) Rendezvous Radar can also benefit from this technology.


NAME AND ADDRESS OF PRINCIPAL INVESTIGATOR (Name, Organization Name, Mail Address,

City/State/Zip)

Lawrence M. Germann

Left Hand Design Corporation

7901 Oxford Road

Longmont , CO 80503 - 8704


NAME AND ADDRESS OF OFFEROR (Firm Name, Mail Address, City/State/Zip)

Left Hand Design Corporation

7901 Oxford Road

Longmont , CO 80503 - 8704