Accession Number:

ADA230357

Title:

Design of a Small-Aperture Steering Mirror for High-Bandwidth Acquisition and Tracking

Descriptive Note:

Technical rept. 1 Oct 1988-30 Nov 1989

Corporate Author:

MASSACHUSETTS INST OF TECH LEXINGTON LINCOLN LAB

Personal Author(s):

• Loney, Gregory C.

Report Date:

1990-10-26

Pagination or Media Count:

23.0

Abstract:

The High-Bandwidth Steering Mirror HBSM prototype is the product of a research program to develop a high-bandwidth, low angular range, two- dimensional beam steerer used in optomechanical pointing, acquisition, and tracking systems. This research centered around the optimization of a beam- steering mechanism comprising a mirror, restoring flexure, actuators, position sensors, and encompassing housing. Various design trade-offs and manufacturing issues involved in building the prototype are discussed, and the resulting performance data are presented. The resulting HBSM design allows integration with a simple closed-loop control scheme. The mirrorcontroller has a closed- loop bandwidth of 10kHz, and 1 degree peak-to-peak stroke mirror normal at low frequencies. This increased bandwidth yields excellent disturbance rejection in the 10- to 1000-Hz, frequency band and enables the generation of faster scan patterns.

Descriptors:

• *SCANNING
• CONTROL
• POSITION(LOCATION)
• OPTIMIZATION
• DETECTORS
• TWO DIMENSIONAL
• TRACKING
• FREQUENCY BANDS
• YIELD
• PATTERNS
• ACTUATORS
• BANDWIDTH
• BEAM STEERING
• FLEXURAL PROPERTIES
• LOW FREQUENCY
• CLOSED LOOP SYSTEMS
• REJECTION
• LOW ANGLES
• MIRRORS

Subject Categories:

• Target Direction, Range and Position Finding
• Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE