Flexible Aircraft Gust Load Alleviation with Incremental Nonlinear Dynamic Inversion

In this paper, an Incremental Nonlinear Dynamic Inversion (INDI) controller is developed for the flexible aircraft gust load alleviation (GLA) problem. First, a flexible aircraft model captures both inertia and aerodynamic coupling effects between flight dynamics and structural vibration dynamics is presented. Then an INDI GLA controller is designed for this aircraft model based on sensor measurements and the Kalman filter online estimation. Besides, the fifth order Pade approximation is used to model the pure time delay in the state estimation. Furthermore, simulations of the flexible aircraft flying through various spatial turbulence and gust fields demonstrate the effectiveness of the proposed controller on rigid-body motion regulation, vertical load alleviation, wing root bending moment reduction and elastic modes suppression. Additionally, numerical perturbation tests and a Monte-Carlo study show the robustness of the proposed controller to aerodynamic model uncertainties.

[1]  Carlos E. S. Cesnik,et al.  Nonlinear Aeroelasticity and Flight Dynamics of High-Altitude Long-Endurance Aircraft , 2001 .

[2]  R. H. Kwong,et al.  Gust Load Alleviation Control for a Flexible Aircraft with Loss of Control Effectiveness , 2017 .

[3]  Eric Ting,et al.  Flight Dynamic Modeling and Stability Analysis of Flexible Wing Generic Transport Aircraft , 2014 .

[4]  Simone Wannemaker,et al.  Dynamics Of Atmospheric Flight , 2016 .

[5]  Erik-Jan Van Kampen,et al.  Gust Load Alleviation and Ride Quality Improvement with Incremental Nonlinear Dynamic Inversion , 2017 .

[6]  Leonard Meirovitch,et al.  Integrated Approach to the Dynamics and Control of Maneuvering Flexible Aircraft , 2003 .

[7]  William L. Garrard,et al.  Design of a multivariable flutter suppression/gust load alleviation system , 1988 .

[8]  Nhan T. Nguyen,et al.  Adaptive Linear Quadratic Gaussian Optimal Control Modification for Flutter Suppression of Adaptive Wing , 2015 .

[9]  David K. Schmidt,et al.  ON THE FLIGHT DYNAMICS OF AEROELASTIC VEHICLES , 1986 .

[10]  Joaquim R. R. A. Martins,et al.  Model-Predictive Gust Load Alleviation Controller for a Highly Flexible Aircraft , 2012 .

[11]  Guido C. H. E. de Croon,et al.  Adaptive Incremental Nonlinear Dynamic Inversion for Attitude Control of Micro Air Vehicles , 2016 .

[12]  Pedro Simplício,et al.  An acceleration measurements-based approach for helicopter nonlinear flight control using Incremental Nonlinear Dynamic Inversion , 2013 .

[13]  Raymond A. de Callafon,et al.  Adaptive Feedforward Control for Gust Loads Alleviation , 2008 .

[14]  Jan Albert Mulder,et al.  Robust Flight Control Using Incremental Nonlinear Dynamic Inversion and Angular Acceleration Prediction , 2010 .

[15]  Aaron J. Ostroff,et al.  RECONFIGURABLE FLIGHT CONTROL USING NONLINEAR DYNAMIC INVERSION WITH A SPECIAL ACCELEROMETER IMPLEMENTATION , 2000 .

[16]  Ilya Kolmanovsky,et al.  Gust Load Alleviation Control for Very Flexible Aircraft , 2011 .

[17]  Youdan Kim,et al.  ACTIVE AEROELASTIC WING DESIGN FOR GUST LOAD ALLEVIATION AND FLUTTER SUPPRESSION , 1997 .

[18]  Peng Lu,et al.  Aircraft Fault-Tolerant Trajectory Control Using Incremental Nonlinear Dynamic Inversion , 2016 .

[19]  Carlos E. S. Cesnik,et al.  Nonlinear Flight Dynamics of Very Flexible Aircraft , 2005 .