Accession Number:

AD0020378

Title:

THE APPLICATION OF SOME NONLINEAR TECHNIQUES FOR THE IMPROVEMENT OF AIRCRAFT BEAM FOLLOWING

Descriptive Note:

Rept. for 1 Spe 1952-15 Feb 1953

Corporate Author:

HONEYWELL INC HOPKINS MN

Report Date:

1953-02-01

Pagination or Media Count:

38.0

Abstract:

The beam-following study was devoted to bracketing improvement and noise reduction. Nonlinear systems in the bracketing-improvement study were investigated in which 1 the system gain was a nonlinear function of the coupler output, 2 the time constant of the lead network was a function of the distance from the localizer transmitter, and 3 a beam position sensor automatically engaged at the moment the rate signal became larger than the displacement signal. Typical REAC solutions are included. A perception filter characterized as a low-pass filter with a variable cut-off frequency and a controlled limit on the second-derivative of the output was developed in the nonlinear program for minimizing beam-noise effects on the ILS-AP-AC control system. Data taken on the REAC are presented as evidence that the performance of passive RC integrators in a second-order low-pass filter with limiting on the second derivative of the output is similar to corresponding portion of the perception filter.

Subject Categories:

  • Antiaircraft Defense Systems
  • Fire Control and Bombing Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE