Title: Method and apparatus for determining when a glide slope signal exceeds a predetermined level

Abstract: The invention relates to a system utilizing an exponential control law for glide slope capture. The capture maneuver from above or below the beam, is a function of decreasing glide slope beam error. The present autopilot approach coupler is an altitude rate command system which provides switchless signal processing during glide slope capture, and tracking.

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Inventors: Simpson, Robert D. (Bellevue, WA, US)

Application Number: 844408
Filing Date: 1977-10-21
Publication_date: 1979-08-14
Assignee: The Boeing Company (Seattle, WA)
Primary Class(es): 244/186 342/411, 701/17
Other Classes:
US Patent Ref:

2439044	Apr, 1968	Ferril, Jr.	343/108.
3335980	Aug, 1967	Doniger et al.	244/185.
3489378	Jan, 1970	Watson et al.	244/187.
3596855	Aug, 1971	Barling	244/186.
3994455	Nov, 1976	Simpson	244/186.

Other Refs:
Primary Examiner: Kunin, Stephen G.
Assistant Examiner:
Attorney: Gardner; Conrad O., Donahue; Bernard A.