Accession Number:

AD0770995

Title:

A Phase Locked Loop for Automatic Positioning Applications,

Descriptive Note:

Corporate Author:

FRANK J SEILER RESEARCH LAB UNITED STATES AIR FORCE ACADEMY COLO

Personal Author(s):

• Janzen,James A.

Report Date:

1973-09-01

Pagination or Media Count:

23.0

Abstract:

An electronic circuit to digitally lock a two-axis servo test table is described in detail. The circuit consists of a digitally controlled phase comparison servo loop that uses the output of a multipole resolver to obtain stability in the fractional arc-second range. This technique is generally applicable to the problem of precision digital control of rotating systems. Author

Descriptors:

• *Phase locked systems
• *Control theory
• *Phase shift circuits
• Position finding
• Gyroscopes
• Logic circuits
• Signal processing
• Servomechanisms

Subject Categories:

• Numerical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE