A method for studying the hunting oscillations of an airplane with a simple type of automatic control

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086 0 ⊔ ‡aY 3.N 21/5:11/L-112
099 ⊔ ⊔ ‡aNACA L-112
100 1 ⊔ ‡aJones, Robert T.
245 1 2 ‡aA method for studying the hunting oscillations of an airplane with a simple type of automatic control / ‡cby Robert T. Jones.
246 1 3 ‡aNACA wartime reports
260 ⊔ ⊔ ‡aLangley Field, VA : ‡bLangley Memorial Aeronautical Laboratory, ‡c1944.
300 ⊔ ⊔ ‡a9, [7] p. : ‡bill. ; ‡c28 cm.
500 ⊔ ⊔ ‡a"NACA WARTIME REPORTS are reprints of papers originally issued to provide rapid distribution of advance research results to an authorized group requiring them for the war effort. They were previously held under a security status but are now unclassified. Some of these reports were not technically edited. All have been reproduced without change in order to expedite general distribution." ‡5FU
500 ⊔ ⊔ ‡a"Report date May 1944." ‡5FU
500 ⊔ ⊔ ‡a"Originally issued May 1944 as Memorandum Report." ‡5FU
500 ⊔ ⊔ ‡a"Report no. L-112." ‡5FU
504 ⊔ ⊔ ‡aIncludes bibliographic references (p. 9).
520 ⊔ ⊔ ‡aSummary: A method is presented for predicting the amplitude and frequency, under certain simplifying conditions, of the hunting oscillations of an automatically controlled aircraft with lag in the control system or in the response of the aircraft to the controls. If the steering device is actuated by a simple right-left type of signal, the series of alternating fixed-amplitude signals occurring during the hunting may ordinarily be represented by a square wave. Formulas are given expressing the response to such a variation of signal in terms of the response to a unit signal. A more complex type of hunting, which may involve cyclic repetition of signals of varying duration, has not been treated and requires further analysis. Several examples of application of the method are included and the results discussed.
530 ⊔ ⊔ ‡aAlso available in electronic format. ‡5FU
538 ⊔ ⊔ ‡aMode of access: Internet.
650 ⊔ 0 ‡aAerodynamics ‡xResearch.
650 ⊔ 0 ‡aOscillations.
710 1 ⊔ ‡aUnited States. ‡bNational Advisory Committee for Aeronautics.
710 2 ⊔ ‡aLangley Aeronautical Laboratory.
830 ⊔ 0 ‡aNACA collection.
CID ⊔ ⊔ ‡a012182931
DAT 0 ⊔ ‡a20111212085306.0 ‡b20121218000000.0
DAT 1 ⊔ ‡a20171120114410.0 ‡b2017-11-20T19:57:08Z
DAT 2 ⊔ ‡a2014-05-22T20:00:04Z
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