Calibration of five-hole probe for flow angles from dynamic and tower fly-by maneuvers AIAA Paper 2002-4627

Parameswaran, V and Jategaonkar, RV and Press, M (2002) Calibration of five-hole probe for flow angles from dynamic and tower fly-by maneuvers AIAA Paper 2002-4627. In: AIAA Atmospheric Flight Mechanics Conference and Exhibit, 5-8 August 2002, Monterey, California.

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    Abstract

    This paper describes the flight test and data analysis techniques applied to calibrate the static pressure measured by the pitot static systems and the flow angles measured by a five-hole probe mounted on a noseboom. Dynamic maneuvers with rapid variations in the aircraft motion are analyzed applying modern parameter estimation techniques based on the output error method to calibrate the angle of attack and angle of sideslip. A complementary approach based on the Kalman Filter technique is applied to wind-box maneuver to calibrate the flow variables. The tower fly-by maneuvers are analyzed using the classical approach of altitude determination through geometrical evaluation of photos; and accurate information is derived from redundant sources to calibrate the pitot static system. The investigations showed that the static pressure measured by aircraft installed pitot static system is accurate enough whereas that measured by an additional sensor mounted on the noseboom required speed dependent correction. The flight estimated sensitivity factors for the flow angles measured by the five-hole probe agreed reasonably well with the manufacturer's specifications subject to corrections for biases resulting from misalignment and time delays caused by the recording equipment.

    Item Type: Conference or Workshop Item (Paper)
    Uncontrolled Keywords: Flight Tests;Data Processing;Calibrating;Static Pressure;Pitot Tubes;Flow Measurement;Flow Geometrynoses (Forebodies) Aircraft Maneuversensitivity Analysiskalman Filtersangle of Attacksideslip13; 13;
    Subjects: AERONAUTICS > Aeronautics (General)
    Division/Department: Flight Mechanics and Control Division, Other, Other
    Depositing User: Mr. N A
    Date Deposited: 03 Feb 2006
    Last Modified: 24 May 2010 09:40
    URI: http://nal-ir.nal.res.in/id/eprint/1005

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