Application of System Identification to Aircraft at NASA Langley Research Center

The past, present, and future of system identification applied to aircraft at NASA Langley Research Center (LaRC) in Hampton, Virginia, are discussed. Significant research advances generated at NASA LaRC in the past are summarized, including some perspective on the role these developments played in the practice of system identification applied to aircraft. Selected recent research efforts are described, to give an idea of the type of activities currently being pursued at NASA LaRC. These efforts include real-time parameter estimation, identifying flying qualities models, advanced experiment design and modeling techniques for static wind-tunnel database development, and indicial function identification for unsteady aerodynamic modeling. Projected future developments in the area are outlined

[1]  Mark S. Smith,et al.  Analysis of Wind Tunnel Oscillatory Data of the X-31A Aircraft , 1999 .

[2]  E. A. Morelli,et al.  Modeling the High Speed Research Cycle 2B Longitudinal Aerodynamic Database Using Multivariate Orthogonal Functions , 1999 .

[3]  S. M. Sliwa,et al.  Some flight data extraction techniques used on a general aviation spin research aircraft , 1979 .

[4]  Vladislav Klein,et al.  Parameter identification applied to the oscillatory motion of an airplane near stall , 1984 .

[5]  V. Klein,et al.  Maximum likelihood method for estimating airplane stability and control parameters from flight data in frequency domain , 1980 .

[6]  R. A. Hess.  Effects of wing modification on an aircraft's aerodynamic parameters as determined from flight data , 1986 .

[7]  Mark B. Tischler,et al.  Demonstration of frequency-sweep testing technique using a Bell 214-ST helicopter , 1987 .

[8]  J. Williams,et al.  Extraction from flight data of longitudinal aerodynamic coefficients for F-8 aircraft with supercritical wing , 1974 .

[9]  R. V. Parrish,et al.  Longitudinal stability and control derivatives of a jet fighter airplane extracted from flight test data by utilizing maximum likelihood estimation , 1972 .

[10]  T. G. Gainer,et al.  Summary of transformation equations and equations of motion used in free flight and wind tunnel data reduction and analysis , 1972 .

[11]  V. Klein,et al.  A preliminary analysis of flight data from the AFTI/F-16 airplane , 1984 .

[12]  Klein Vladislav,et al.  Analysis of Wind Tunnel Longitudinal Static and Oscillatory Data of the F-16XL Aircraft , 1997 .

[13]  James J. Donegan,et al.  Determination of lateral-stability derivatives and transfer-function coefficients from frequency-response data for lateral motions , 1955 .

[14]  J. G. Batterson,et al.  On the Determination of Airplane Model Structure From Flight Data , 1982 .

[15]  L. B. Schiff,et al.  On the formulation of the aerodynamic characteristics in aircraft dynamics , 1976 .

[16]  David L. Raney,et al.  Lateral stability analysis for X-29A drop model using system identification methodology , 1989 .

[17]  Vladislav Klein,et al.  Estimation of aircraft aerodynamic parameters from flight data , 1989 .

[18]  I. Abbasy.  Determination of stability and control parameters of a general aviation airplane from flight data , 1983 .

[19]  Vladislav Klein,et al.  Aerodynamic parameters of the X-31 drop model estimated from flight-data at high angles of attack , 1992 .

[20]  Vladislav Klein,et al.  Modeling of aircraft unsteady aerodynamic characteristics. Part 2: Parameters estimated from wind tunnel data , 1995 .

[21]  A. E. Pearson.  Aerodynamic Parameter Estimation Via Fourier Modulating Function Techniques , 1995 .

[22]  V. Klein,et al.  Determination of airplane model structure from flight data using splines and stepwise regression , 1983 .

[23]  V. Klein,et al.  Estimation of aerodynamic parameters from flight data of a high incidence research model , 1986 .

[24]  Eugene A. Morelli.  Multiple input design for real-time parameter estimation in the frequency domain , 2003 .

[25]  Eugene A. Morelli.  Flight Test Validation of Optimal Input Design Using Pilot Implementation , 1994 .

[26]  J. G. Batterson,et al.  Determination of airplane aerodynamic parameters from flight data at high angles of attack , 1982 .

[27]  R. D. Grove,et al.  A real-time digital program for estimating aircraft stability and control parameters from flight test data by using the maximum likelihood method , 1973 .

[28]  T. H. Bond,et al.  Effects of Horizontal Tail Ice on Longitudinal Aerodynamic Derivatives , 1991 .

[29]  F H Norton,et al.  Preliminary report on free flight tests , 1920 .

[30]  R. V. Jategaonkar,et al.  Evolution of flight vehicle system identification , 1996 .

[31]  Eugene A. Morelli,et al.  Determining the accuracy of maximum likelihood parameter estimates with colored residuals , 1994 .

[32]  Eugene A. Morelli.  Flight Test of Optimal Inputs and Comparison with Conventional Inputs , 1999 .

[34]  Eugene A. Morelli,et al.  Wind Tunnel Database Development using Modern Experiment Design and Multivariate Orthogonal Functions , 2002 .

[35]  C Murphy Patrick,et al.  Closed-Loop System Identification Experience for Flight Control Law and Flying Qualities Evaluation of a High Performance Fighter Aircraft , 1998 .

[36]  Klein Vladislav.  Modeling of Longitudinal Unsteady Aerodynamics of a Wing-Tail Combination , 1999 .

[37]  M. Marchand,et al.  Frequency Domain Parameter Estimation of Aeronautical Systems without and with Time Delay , 1985 .

[38]  V. Klein,et al.  Identification evaluation methods , 1979 .

[39]  J. G. Batterson,et al.  Lateral and longitudinal aerodynamic stability and control parameters of the basic vortex flap research aircraft as determined from flight test data , 1986 .

[40]  R. K. Mehra,et al.  Maximum likelihood identification and optimal input design for identifying aircraft stability and control derivatives , 1973 .

[41]  E. Morelli.  Global nonlinear parametric modelling with application to F-16 aerodynamics , 1998, Proceedings of the 1998 American Control Conference. ACC (IEEE Cat. No.98CH36207).

[42]  F H Norton,et al.  Control in Circling Flight , 1923 .

[43]  Patrick C. Murphy,et al.  Determination of Airplane Model Structure From Flight Data by Using Modified Stepwise Regression , 1981 .

[44]  V. Klein,et al.  On the identification of a highly augmented airplane , 1985 .

[45]  Vladislav Klein,et al.  Partitioning of flight data for aerodynamic modeling of aircraft at high angles of attack , 1989 .

[46]  Klein Vladislav,et al.  Estimation of Aircraft Unsteady Aerodynamic Parameters From Dynamic Wind Tunnel Testing , 2001 .

[47]  F H Norton.  The measurement of the damping in roll on a JN4h in flight , 1924 .

[48]  W. F. Hodge.  Comparison of analytical and flight test identified aerodynamic derivatives for a tandem-rotor transport helicopter , 1980 .

[49]  J. Batterson.  Estimation of airplane stability and control derivatives from large amplitude longitudinal maneuvers , 1981 .

[50]  Harry Greenberg.  A survey of methods for determining stability parameters of an airplane from dynamic flight measurements , 1951 .

[51]  John M Eggleston,et al.  Application of several methods for determining transfer functions and frequency response of aircraft from flight data , 1954 .

[52]  K. W. Iliff,et al.  Systems identification using a modified Newton-Raphson method: A FORTRAN program , 1972 .

[53]  A Morelli Eugene.  Identification of Low Order Equivalent System Models From Flight Test Data , 2000 .

[54]  Eugene A. Morelli,et al.  Response Surface Modeling Using Multivariate Orthogonal Functions , 2001 .

[55]  V. Klein,et al.  Frequency Domain Identification of a Linear System Using Maximum Likelihood Estimation , 1979 .

[56]  V. Klein,et al.  Aerodynamic parameters estimated from flight and wind tunnel data , 1986 .

[57]  Eugene A. Morelli,et al.  Nonlinear aerodynamic modeling using multivariate orthogonal functions , 1993 .

[58]  W Taylor.  Applications of parameter estimation in the study of spinning airplanes , 1982 .

[59]  P. Murphy,et al.  Maximum likelihood algorithm using an efficient scheme for computing sensitivities and parameter confidence intervals , 1984 .

[60]  J. G. Batterson.  STEP and STEPSPL: Computer programs for aerodynamic model structure determination and parameter estimation , 1986 .

[61]  Patrick C. Murphy,et al.  Airplane model structure determination from flight data , 1983 .

[62]  A Morelli Eugene,et al.  Low Order Equivalent System Identification for the Tu-144LL Supersonic Transport Aircraft , 2000 .

[63]  David L. Raney.  Analysis of lateral stability of X-29 drop model using system identification methodology , 1987 .

[64]  Eugene A. Morelli.  IN-FLIGHT SYSTEM IDENTIFICATION , 1998 .

[65]  Lawrence W. Taylor,et al.  A New Criterion for Modelling Systems , 1973, Optimization Techniques.

[66]  William R. Wells,et al.  The influence of unsteady aerodynamics on extracted aircraft parameters , 1979 .

[67]  V. Klein,et al.  Aircraft parameter estimation in frequency domain , 1978 .

[68]  F H Norton,et al.  The Vertical, Longitudinal, and Lateral Accelerations Experienced by an S. E. 5a Airplane While Maneuvering , 1924 .

[69]  W. T. Suit,et al.  Investigation of the effect of vehicle, angle-of-attack, and trim elevon position on lateral-directional aerodynamic parameters of the Shuttle Orbiter , 1984 .

[70]  Lawrence W. Taylor,et al.  Semiempirical method for prediction of aerodynamic forces and moments on a steadily spinning light airplane , 1987 .

[71]  Efficient computation of parameter confidence intervals , 1987 .

[72]  V. Klein,et al.  Parameter Estimation of a Highly Augmented Aircraft from Flight Data , 1992 .

[73]  Vladislav Klein,et al.  Modeling of Aircraft Unsteady Aerodynamic Characteristics/Part 3 - Parameters Estimated from Flight Data. Part 3; Parameters Estimated from Flight Data , 1996 .

[74]  D. A. Keskar,et al.  Determination of instrumentation errors from measured data using maximum likelihood method , 1980 .

[75]  G. L. Smith.  On the theory and methods of statistical inference , 1967 .

[76]  V. Klein,et al.  Parameter estimation applied to general aviation aircraft - A case study , 1982 .

[77]  J. G. Batterson,et al.  Determination of longitudinal aerodynamic derivatives using flight data from an icing research aircraft , 1989 .

[78]  Patrick C. Murphy,et al.  Prediction of Unsteady Aerodynamic Coefficients at High Angles of Attack , 2001 .

[79]  Vladislav Klein,et al.  Two biased estimation techniques in linear regression: Application to aircraft , 1988 .

[80]  R. L. Bowles,et al.  Procedure for estimating stability and control parameters from flight test data by using maximum likelihood methods employing a real-time digital system , 1972 .

[81]  W. T. Suit,et al.  On matching the systems identification technique to the particular application. [in evaluating flight test data] , 1981 .

[82]  P C Murphy.  A methodology for airplane parameter estimation and confidence interval determination in nonlinear estimation problems. Ph.D. Thesis - George Washington Univ., Apr. 1985 , 1986 .

[83]  Vladislav Klein,et al.  Modeling of aircraft unsteady aerodynamic characteristics. Part 1: Postulated models , 1994 .

[84]  V. Klein,et al.  Application of system identification to high performance aircraft , 1993, Proceedings of 32nd IEEE Conference on Decision and Control.

[85]  Patrick C. Murphy,et al.  Determination of model structure and parameters of an airplane from pre- and post-stall flight data , 1981 .

[86]  R. Montgomery,et al.  A moving window parameter adaptive control system for the F-8 DFBW aircraft , 1976, 1976 IEEE Conference on Decision and Control including the 15th Symposium on Adaptive Processes.

[87]  A Morelli Eugene.  High Accuracy Evaluation of the Finite Fourier Transform Using Sampled Data , 1997 .

[88]  Vladislav Klein,et al.  Aerodynamic parameters of an advanced fighter aircraft estimated from flight data. Preliminary results , 1989 .

[89]  Klein Vladislav,et al.  Aerodynamic Parameters of High Performance Aircraft Estimated From Wind Tunnel and Flight Test Data , 1998 .

[90]  S. M. Sliwa.  An on-line equivalent system identification scheme for adaptive control. Ph.D. Thesis - Stanford Univ. , 1983 .

[91]  Vladislav Klein,et al.  Validation of aerodynamic parameters for high-incidence research models , 1989 .

[92]  Alexander Kokolios.  Use of a Kalman filter for the determination of aircraft aerodynamic characteristics from flight test data , 1994 .

[93]  Hartley A Soule,et al.  A Comparison Between the Theoretical and Measured Longitudinal Stability Characteristics of an Airplane , 1934 .

[94]  Eugene A. Morelli,et al.  System IDentification Programs for AirCraft (SIDPAC) , 2002 .

[95]  Eugene A. Morelli.  Optimal input design for aircraft instrumentation systematic error estimation , 1991 .

[96]  W. T. Suit,et al.  Effects of control inputs on the estimation of stability and control parameters of a light airplane , 1977 .

[97]  V. Klein,et al.  Estimation of Transport Airplane Aerodynamics using Multiple Stepwise Regression , 1985, 1985 American Control Conference.

[98]  Fred C. Schweppe,et al.  Uncertain dynamic systems , 1973 .

[99]  V. Klein,et al.  Application of Fourier Modulating Functions to Parameter Estimation of a Multivariable Linear Differential System , 1994 .

[100]  V. Klein,et al.  Estimated low-speed aerodynamic parameters of an advanced fighter from flight and wind tunnel data , 1984 .

[102]  K. W. Iliff,et al.  Parameter Estimation for Flight Vehicles , 1989 .

[103]  Vladislav Klein.  On parameter estimation of highly augmented aircraft , 1989 .

[104]  Eugene A. Morelli,et al.  Real-Time Parameter Estimation in the Frequency Domain , 1999 .

[105]  Eugene A. Morelli,et al.  Wind Tunnel Database Development Using Modern Experiment Design and Multivariate Orthogonal Functions (Invited) , 2003 .

[106]  W. T. Suit,et al.  Longitudinal aerodynamic parameters of the Kestrel aircraft (XV-6A) extracted from flight data , 1973 .

[107]  William R. Wells,et al.  Simplified Unsteady Aerodynamic Concepts with Application to Parameter Estimation , 1979 .

[108]  Vladiaslav Klein,et al.  Estimation of bias errors in measured airplane responses using maximum likelihood method , 1987 .

[109]  Eugene A. Morelli,et al.  Estimating noise characteristics from flight test data using optimal fourier smoothing , 1995 .

[110]  Klein Vladislav,et al.  Estimation of Aircraft Nonlinear Unsteady Parameters From Wind Tunnel Data , 1998 .

[111]  J Curry Timothy.  Estimation of Handling Qualities Parameters of the Tu-144 Supersonic Transport Aircraft From Flight Test Data , 2000 .

[112]  V. Klein,et al.  Parameter Identification for Unsteady Aerodynamic Systems by the Modulating Function Technique , 1994 .

[113]  James G. Batterson,et al.  Estimation of longitudinal stability and control derivatives for an icing research aircraft from flight data , 1989 .

[114]  W. T. Suit.  Lateral aerodynamic parameters extracted from flight data for the F-8C airplane in maneuvering flight , 1977 .

[115]  James G. Batterson.  Analysis of Oscillatory Motion of a Light Airplane at High Values of Lift Coefficient , 1983 .

[116]  Marvin Shinbrot.  A least squares curve fitting method with applications to the calculation of stability coefficients from transient-response data , 1951 .

[117]  Vladislav Klein,et al.  Aerodynamic parameters of High-Angle-of attack Research Vehicle (HARV) estimated from flight data , 1990 .

[118]  Eugene A. Morelli,et al.  Accuracy of Aerodynamic Model Parameters / Estimated from Flight Test Data , 1997 .

[119]  V. Klein,et al.  Determination of aerodynamic parameters of a fighter airplane from flight data at high angles of attack , 1983 .

[120]  A Morelli Eugene.  Advances in Experiment Design for High Performance Aircraft , 1998 .

[121]  W. T. Suit,et al.  Comparison of stability and control parameters for a light, single-engine, high-winged aircraft using different flight test and parameter estimation techniques , 1979 .

[122]  L. W. Taylor,et al.  An evaluation of aerodynamics modeling of spinning light airplanes , 1983 .