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Stability augmentation of a sailplane in towed flight

Published online by Cambridge University Press:  04 July 2016

G. de Matteis  and
W. Tamilia
G. de Matteis
Affiliation:
Department of Mechanics and Aeronautics, University of Rome “La Sapienza”, Via Eudossiana 18, Rome 00184, Italy
W. Tamilia
Affiliation:
Department of Mechanics and Aeronautics, University of Rome “La Sapienza”, Via Eudossiana 18, Rome 00184, Italy
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Abstract

This study details the design of an automatic control system for a sailplane in towed flight, the principal objective of which is control the relative position of the tow-aircraft and glider, since a large vertical distance is expected to drive unstable motions of the whole system. The synthesis of the control system is based on an approximated model for the constrained sailplane. The controlled motion of the sailplane is simulated by a general dynamic model of the three bodies, namely the two aircraft and the rope. Significant numerical results are presented and discussed in order to determine the effectiveness of the stability augmentation.

Type
Research Article
Information
The Aeronautical Journal , Volume 97 , Issue 970 , December 1993 , pp. 349 - 356
Copyright
Copyright © Royal Aeronautical Society 1993 

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References

1. Phillips, W.M. Theoretical analysis of oscillations of a towed cable, NACATN-1796, 1949.Google Scholar
2. Maryniac, J. Simplified longitudinal stability of a towed sailplane, Mechanica Teoretyczna i Stozowana, 1967, (1), pp 57–101.Google Scholar
3. Maryniac, J. Dynamic longitudinal stability of a towed sailplane, Mechanica Teoretyczna i Stozowana, 1967, (3), pp 347–383.Google Scholar
4. Misra, A.K. and Modi, V.J. Deployment and retrieval of shuttle supported tethered satellites, J Guidance Cntl Dyn, 1982, 5, (3), pp 278–285.Google Scholar
5. De Matteis, G. Longitudinal dynamics of a towed sailplane, J Guidance Cntl Dyn, 1993, 16, (5), pp. 812–819.Google Scholar
6. Doyle, G.R. Mathematical model for the ascent and descent of a high-altitude tethered balloon, J Aircr, 1969, 6, (5), pp 457–462.Google Scholar
7. Delaurier, J.D. A stability analysis for tethered aerodynamically shaped balloons, J Aircr, September 1972, 9, pp 646–651.Google Scholar
8. Cochran, J.E., Innocenti, M., No, T.S., and Thukral, A. Dynamics and control of maneuverable towed flight vehicles, J Guidance Cntl Dyn, 1992, 15, (5), pp 1245–1252.Google Scholar
9. De Matteis, G. and De Socio, L.M. A sensitivity analysis of the sta bility of a tug-rope-sailplane system, Proceedings of the 18th ICAS Congress, Beijing, China, 1992, pp 2016–2023.Google Scholar
10. D’ambrosio, D. Sailplane Dynamics During Towing, (in Italian), PhD Thesis, University of Rome, 1992.Google Scholar
11. DeLaurier, J.D. A first order theory for predicting the stability of cable towed and tethered bodies where the cable has a general curvature and tension variation, VKI Technical Note 68, December 1970.Google Scholar
12. Etkin, B. Dynamics of Atmospheric Flight, John Wiley and Sons, New York, 1972, Chapter 4.Google Scholar
13. Morelli, P. Static Stability and Control of Sailplanes, OSTIV, Voorburg, The Netherlands, 1976.Google Scholar
14. Hoerner, S.F. Fluid Dynamic Drag, Hoerner, Midland Park, 1958.Google Scholar
15. Roskam, J. Airplane Flight Dynamics and Automatic Flight Control, Roskam Aviation and Engineering Corporation, Ottawa, Kansas, 1979.Google Scholar
16. Stevens, B.L. and Lewis, F.L. Aircraft Control and Simulation, John Wiley Sons, New York, 1992.Google Scholar
17. Jacquot, R.G. Modern Digital Control Systems, Marcel Dekker, New York, 1981, Chapter 9.Google Scholar