Accession Number:

AD0743002

Title:

Base Motion Isolation of a Two-Axis Beam Deflector

Descriptive Note:

Scientific rept.

Corporate Author:

FRANK J SEILER RESEARCH LAB UNITED STATES AIR FORCE ACADEMY CO

Personal Author(s):

• Comfort, Gary C.

Report Date:

1972-05-01

Pagination or Media Count:

21.0

Abstract:

The base motion isolation characteristics of an optical deflector with a two-axis gimbal support are investigated. The particular configuration of the beam deflector system considered utilizes rate integrating gyros to provide a rate inner control loop with an optical tracker providing an outer position control loop. Base motion isolation is partially achieved by the gimbal support assumed to be frictionless. However, input beam motion relative to the optical surface of the beam deflector is shown to produce large excursions of the output beam. As a result, a feed-forward control loop is added to measure and compensate for input beam motion, i.e., base motion.

Descriptors:

• *HELICOPTERS
• *OPTICAL TRACKING
• CONTROL SYSTEMS
• FEEDBACK
• GIMBALS
• RELIABILITY(ELECTRONICS)
• OPTICAL SCANNING
• NUMERICAL ANALYSIS

Subject Categories:

• Helicopters
• Optical Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE