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Trajectory tracking for a helicopter model

Published online by Cambridge University Press:  04 July 2016

G. Avanzini
G. Avanzini*
Affiliation:
Department of Aeronautical and Space EngineeringPolytechnic of Turin, Italy
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Abstract

In this paper an algorithm for the trajectory tracking of a three-dimensional trajectory, assigned as a function of time, is presented. The proposed control system is suitable for application on unmanned aerial vehicles (UAVs) or for aircraft that require accurate path tracking, as in the case of rotorcraft in nap-of-the-earth (NOE) flight conditions. The control system logic features (i) an external loop based on a simple guidance scheme and a two-time-scale inverse simulation algorithm, and (ii) an inner loop, based on a linear-quadratic (LQ) full-state-feedback controller. In this way the control action is split into two contributions, i.e. a feedforward command, in order to follow the trajectory generated by the guidance scheme, and a feedback increment, for compensating external disturbances and model uncertainties. A rotorcraft model is used to demonstrate the algorithm capability in a NOE–like flight task. System robustness is analysed and control system performance are discussed in terms of the error between vehicle state and desired trajectory at a given time. Simulation of a representative manoeuvre shows that the feedforward estimate of the control action is accurate and only minor compensation is required from the LQ tracker. The algorithm is suitable for a number of applications, as (i) no simplifying assumptions are postulated for the model, (ii) there are no restrictions on the flight condition, and (iii) the computational time should allow for real–time implementation.

Type
Research Article
Information
The Aeronautical Journal , Volume 105 , Issue 1044 , February 2001 , pp. 69 - 76
Copyright
Copyright © Royal Aeronautical Society 2001 

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References

1. Cheng, V.H.L. and Sridhar, B. Considerations for automated nap-of-the-earth rotorcraft flight, J Am Helicopter Soc, Apr 1991, 36, (2), pp 61–69.Google Scholar
2. Boyle, D. and Chamintoff, G.E. Autonomous maneuver tracking for self-piloted vehicles, J Guidance, Control, and Dynamics, Jan-Feb 1999, 22, (1), pp 58–67.Google Scholar
3. Avanzini, G., De Matteis, G. and De Socio, L.M. Two time-scale integration method for inverse simulation, J Guidance, Control and Dynamics, May-June 1999, 22, (3), pp 395–401.Google Scholar
4. De Matteis, G., De Socio, L.M. and Leonessa, A. Solution of aircraft inverse problems by local optimization, J Guidance, Control, and Dynamics, 1995, 18, (3), pp 567–571.Google Scholar
5. Snell, S.A., Enns, D.F. and Garrard, W.L. Nonlinear inversion control for a supermaneuverable aircraft, J Guidance, Control and Dynamics, July-Aug 1992, 15, (4), pp 976–984.Google Scholar
6. Heiges, M.W., Menon, P.K.A. and Schrage, D.P. Synthesis of a helicopter full-authority controller, J Guidance, Control and Dynamics, Jan-Feb 1992, 15, (1), pp 222–227.Google Scholar
7. Stiharu-Alexe, I. and O'shea, J. Four-dimensional guidance of atmospheric vehicles, J Guidance, Control and Dynamics, Jan-Feb 1996, 19, (1), pp 113–122.Google Scholar
8. Avanzini, G. and De Matteis, G. Two time-scale inverse simulation of a helicopter model, AIAA Paper 99-4112, Atmospheric Flight Mechanics Conference, 9-11 August 1999, Portland, OR.Google Scholar
9. Avanzini, G., De Matteis, G. and De Socio, L.M. Natural description of aircraft motion, J Guidance, Control and Dynamics, Mar-Apr 1998, 21, (2), pp 229–233.Google Scholar
10. Hess, R.A. and Gao, C. A generalized algorithm for inverse simulation applied to helicopter maneuvering flight, J Amer Helicopter Society, Oct-Dec 1993, 38, (4), pp 3–15.Google Scholar
11. Talbot, P.D., Tinling, B.E., Decker, W.A. and Chen, R.T.N. A mathematical model of a single main rotor helicopter for piloted simulation, Sept 1982, NASA TM-84281.Google Scholar
12. Kepr, B. Differential Geometry, Survey of Applicable Mathematics, Rektorys, K. (Ed), 1969, MIT Press, Cambridge, MA, pp 306–317.Google Scholar