An Experimental Evaluation of Generalized Predictive Control for Tiltrotor Aeroelastic Stability Augmentation in Airplane Mode of Flight

The results of a joint NASA/Army/Bell Helicopter Textron wind-tunnel test to assess the potential of Generalized Predictive Control (GPC) for actively controlling the swashplate of tiltrotor aircraft to enhance aeroelastic stability in the airplane mode of flight are presented. GPC is an adaptive time-domain predictive control method that uses a linear difference equation to describe the input-output relationship of the system and to design the controller. The test was conducted in the Langley Transonic Dynamics Tunnel using an unpowered 1/5-scale semispan aeroelastic model of the V-22 that was modified to incorporate a GPC-based multi-input multi-output control algorithm to individually control each of the three swashplate actuators. Wing responses were used for feedback. The GPC-based control system was highly effective in increasing the stability of the critical wing mode for all of the conditions tested, without measurable degradation of the damping in the other modes. The algorithm was also robust with respect to its performance in adjusting to rapid changes in both the rotor speed and the tunnel airspeed.

[1]  David W. Clarke,et al.  Generalized predictive control - Part I. The basic algorithm , 1987, Autom..

[2]  Minh Q. Phan,et al.  Identification and control of mechanical systems , 2001 .

[3]  Inderjit Chopra,et al.  Aeroelastic Analysis of Advanced Geometry Tiltrotor Aircraft , 1995 .

[4]  J. P. Magee,et al.  V/STOL tilt rotor aircraft study: Wind tunnel tests of a full scale hingeless prop/rotor designed for the Boeing Model 222 tilt rotor aircraft , 1973 .

[5]  W. Earl Hall,et al.  Prop‐Rotor Stability at High Advance Ratios , 1966 .

[6]  G Kvaternik Raymond,et al.  Exploratory Studies in Generalized Predictive Control for Active Aeroelastic Control of Tiltrotor Aircraft , 2000 .

[7]  Juang Jer-Nan,et al.  Recursive Deadbeat Controller Design , 1997 .

[8]  Wayne Johnson,et al.  Rotor Design for Whirl Flutter: An Examination of Options for Improving Tiltrotor Aeroelastic Stability Margins , 1999 .

[9]  David J. Piatak,et al.  A parametric investigation of whirl-flutter stability on the WRATS tiltrotor model , 2002 .

[10]  Minh Q. Phan,et al.  Predictive Controllers for Feedback Stabilization , 1998 .

[11]  莊哲男.  Applied System Identification , 1994 .

[12]  Hugh W. Upton,et al.  HELICOPTER ROTOR BLADE RADAR ANTENNA , 1966 .

[13]  H. R. Alexander,et al.  V/STOL tilt rotor aircraft study. Volume 7: Tilt rotor flight control program feedback studies , 1973 .

[14]  K. Lim,et al.  Generalized Predictive Control of , 2022 .

[15]  R. B. Taylor,et al.  V/STOL Dynamics and Aeroelastic Rotor - Airframe Technology. Volume 2. Description and Correlation of New Methodologies , 1972 .

[16]  J. M. Van Aken,et al.  Alleviation of Whirl-Flutter on Tilt-Rotor Aircraft Using Active Controls , 1991 .

[17]  Popelka David,et al.  Results of an Aeroelastic Tailoring Study for a Composite Tiltrotor Wing , 1995 .

[18]  W. Johnson,et al.  Dynamics of tilting proprotor aircraft in cruise flight , 1974 .

[19]  Inderjit Chopra,et al.  Stabilizing pylon whirl flutter on a tilt-rotor aircraft , 1991 .

[20]  Kenneth W. Eure,et al.  Adaptive Predictive Feedback Techniques for Vibration Control , 1998 .

[21]  H. Edenborough.  Investigation of tilt-rotor VTOL aircraft rotor-pylon stability , 1967 .

[22]  H. K. Edenborough,et al.  Investigation of tilt-rotor VTOL aircraft rotorpylon stability. , 1968 .

[23]  Omri Rand,et al.  The Influence of Composite Induced Couplings on Tiltrotor Whirl Flutter Stability , 1998 .

[24]  J. Richalet,et al.  Model predictive heuristic control: Applications to industrial processes , 1978, Autom..

[25]  J. Juang,et al.  Predictive feedback and feedforward control for systems with unknown disturbances , 1999 .

[26]  David Clarke,et al.  Advances in model-based predictive control , 1994 .

[27]  Juang Jer-Nan,et al.  State-Space System Realization With Input- and Output-Data Correlation , 1997 .

[28]  Richard W. Longman,et al.  Identification of linear systems by an asymptotically stable observer , 1992 .

[29]  Ken-Ichi Nasu.  Tilt-rotor flutter control in cruise flight , 1986 .

[30]  T. Ben Settle,et al.  Evolution and Test History of the V-22 0.2-Scale Aeroelastic Model , 1992 .

[31]  Petre Stoica,et al.  Decentralized Control , 2018, The Control Systems Handbook.

[32]  Juang Jer-Nan,et al.  Deadbeat Predictive Controllers , 1997 .

[33]  Mark W. Nixon,et al.  Design, Analysis, and Test of a Composite Tailored Tiltrotor Wing , 1997 .

[34]  Jer-Nan Juang,et al.  Broadband Noise Control Using Predictive Techniques , 1997 .

[35]  R. G. Kvaternik,et al.  Studies in tilt rotor VTOL aircraft aeroelasticity, volume 2. Ph.D. Thesis - Case Western Reserve Univ. , 1973 .

[36]  Minh Q. Phan,et al.  Predictive feedback controllers for stabilization of linear multivariable systems , 1996 .

[37]  David J. Piatak,et al.  Aeroelastic Tailoring for Stability Augmentation and Performance Enhancements of Tiltrotor Aircraft , 1999 .