A demonstration of frequency-sweep testing using a Bell-214ST single-rotor helicopter was completed in support of the Army's development of an updated MIL-H-8501A, and an LHX (ADS-33) handling-qualities specification. Hover and level-flight (V sub a = 0 knots and V sub a = 90 knots) tests were conducted in 3 flight hours by Army test pilots at the Army Aviation Engineering Flight Activity (AEFA) at Edwards AFB, Calif. Bandwidth and phase-delay parameters were determined from the flight-extracted frequency responses as required by the proposed specifications. Transfer function modeling and verification demonstrates the validity of the frequency-response concept for characterizing closed-loop flight dynamics of single-rotor helicopters -- even in hover. This report documents the frequency-sweep flight-testing technique and data-analysis procedures. Special emphasis is given to piloting and analysis considerations which are important for demonstrating frequency-domain specification compliance.


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    Title :

    Demonstration of frequency-sweep testing technique using a Bell 214-ST helicopter



    Publication date :

    1987-04-01


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Demonstration of Frequency-Sweep Testing Technique Using a Bell 214-St Helicopter

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    Demonstration of Frequency-Sweep Testing Technique Using a Bell 214-ST Helicopter

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