The Application of Some Nonlinear Techniques for the Improvement of Aircraft Beam Following

Item

Title
The Application of Some Nonlinear Techniques for the Improvement of Aircraft Beam Following
Date
1953
Index Abstract
Coming Soon
Photo Quality
Undetermined
Report Number
WADC TR 53-74
Creator
Markusen, David L.
Norton, John S.
Pomeroy, Orville P.
Corporate Author
Honeywell, Inc.
Extent
38
NTRL Accession Number
AD020378
Identifier
AD0020378
Access Rights
Unknown
Distribution Classification
1
DTIC Record Exists
Yes
Distribution Change Authority Correspondence
AFAL LTR
Distribution Change Action Date
1/1/1900
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.
Report Availability
Not available via Contrails
Date Issued
1953-02
Index In
DTIC
Type
report