The problem of designing a control system for a nonlinear unstable canard aircraft is presented. Design performance criteria including robustness and pilot-handling qualities are discussed. The eigenstructure-assignment technique is used to determine the gains of a simple, practical system. The results of three designs are presented and show good handling and robustness qualities.
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References
1.
Andry, A.N., jr, Shapiro, E.Y. and Chung, J.C.1983. 'Eigenstructure assignment for linear systems', IEEE Trans Aerosp & Electron Sys, AES-19 (5).
2.
Burns, B.R.A.1985. 'Canards designed with care'. Flight Int, (23 Feb), 19-21.
3.
Collins, D.J. and Gordon, V.C.1986. 'Multi-input multi-output automatic design synthesis for performance and robustness', J Guidance, 9 (May/Jun).
4.
Doyle, J.C. and Stein, G.1981. 'Multivariable feedback design: Concepts for a classical/modern synthesis' IEEE Trans Auto Cont, AC-26 (1).
5.
Gibson, J.C.1982. 'Pilot handling qualities design criteria for high order flight control systems', AGARD CP 333, paper 4.
6.
Gibson, J.C.1986. 'Handling qualities for unstable combat aircraft' Proc 15th Cong of the Int Council Aeron Sci, PubAIAA
7.
Kaul, H.J., Stella, F. and Walker, M.J.1984. 'The flight control system for the Experimental Aircraft Programme (EAP) demonstrator aircraft', AGARD CP 384, paper 24.
8.
Klema, V.C. and Laub, A.J.1980. 'The singular value decomposition, its computation and some applications', IEEE Trans Auto Cont, AC-25 (2).
9.
Kneeland, B.T., McNamara, N.G. and White, C.L.1983. 'The impact of the F/A-18 aircraft digital flight control system and displays on flight testing and safety', AGARD CP 347, paper 15.
10.
Lehtomaki, N.A., Sandell, N.R. jr and Athans, M.1981. 'Robustness results in linear quadratic Gaussian-based multivariable control designs', IEEE Trans Auto Cont, AC-26 (1).
11.
McRuer, D., Ashkenas, I. and Graham, D.1973. 'Aircraft dynamics and automatic contral', Princeton University Press.
12.
MIL-F-8785C. 1980. Flying qualities of piloted aeroplanes.
13.
Moorehouse, O.J. and Woodcock, R.J.1982. 'Present status of flying qualities criteria for conventional aircraft', AGARD CP 333, paper 1.
14.
Mukhopadhyay, V. and Newsom, J.R.1984. 'A multiloop system stability margin study using matrix singular values', J Guidance, 7 (Sep/Oct) .
15.
Newson, J.R. and Mukhopadhyay, V.1985. 'A multiloop robust controller design study using singular value gradients', J Guidance, 8 (Jul/Aug).
16.
Parry, D.L.K. and Murray-Smith. D. J.1985. 'The application of model control theory to the single rotor helicopter', Proc 11th European Rotocraft Forum, London.
17.
Safonov, M.G., Laub, A.J. and Hartmann, G.L.1981. 'Feedback properties of multivariable systems: the role and use of the return difference matrix', IEE Trans Auto Cont , AC-26 (1).
18.
Smith, P.1987. 'A graphical method for improving eigenstructure assignment design', RAE TM (in print).
19.
Sobel, K.M. and Shapiro, E.Y.1985. 'A design methodology for pitch painting flight control systems', J Guidance, 5 (Mar/Apr).
20.
Srithnathkumar, S.1978. 'Eigenvalue/eigenvector assignment using output feedback ', IEEE Trans Auto Cont, AC-23 (1).
21.
Stirling, R.1984. Dynamic modelling of actuator rate limit, Report No RS/1/84, Dept of Aeronautical Engineering, University of Bristol .
22.
TSIM user guide. 1986. Cambridge Control Ltd.
23.
Winter, J.S., Corbin, M.J. and Murphy, L.M.1983. Description of TSIM2: a software package for computer aided design of flight control systems, Royal Aircraft Establishment Publication TR 83007.
