THE APPLICATION OF SOME NONLINEAR TECHNIQUES FOR THE IMPROVEMENT OF AIRCRAFT BEAM FOLLOWING
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-A/P-A/C 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1953
- Accession Number
- AD0020378
Entities
People
- David L. Markusen
- John S. Norton
- Orville P. Pomeroy
Organizations
- Honeywell International, Inc.