Abstract
Practical aspects of adaptive control are discussed. Basic assumptions such as linearity, persistent excitation, known process order and dead time could be violated unless special precautions are taken. Implementation guidelines to avoid consequent problems such as estimator windup and parameter divergence are surveyed. Further findings on practical aspects are derived from extensive studies in the implementation of an adaptive Smith Predictor. In particular, the effects of d.c. levels and of faults such as static load disturbance and large parameter change are discussed. A new solution based on a two-level fault detection scheme with modified estimator is introduced and substantiated by simulation.
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References
K.J. Aström, “Theory and Applications of Adaptive Control–a Survey,” Automatica, vol. 19, pp. 471–486, 1983.
G.C. Goodwin and K.S. Sin, Adaptive Filtering Prediction and Control, Prentice-Hall, 1984.
C.J. Harris and S.A. Billings, “Self-tuning and Adaptive Control: Theory and Applications,” IEEE Publication, 1981.
R. Isermann, Digital Control Systems, Springer-Verlag, 1981.
A. Hodgson, “Problems of Integrity in Applications of Adaptive Controllers,” Ph.D. thesis, Dept. of Engrg. Sc., Oxford University, UK, 1982.
B. Wittenmark and K.J. Aström, “Practical Issues in the Implementation of Self-tuning Control,” Automatica, vol. 20, pp. 595–606, 1984.
C.C. Hang, T.H. Lee and T.T. Tay, “Application of Recursive Parameter Estimation as an Auto-tuning Aid,” to be presented at ISA Annual Conference, Oct. 1985.
E. Irving, “Improving Power Network Stability and Unit Stress with Adaptive Generator Control,” Automatica, vol. 15, pp. 31–46, 1979.
T.R. Fortescue, L.S. Kershenbaum and B.E. Ydstie, “Implementation of Self-tuning Regulators with Variable Forgetting Factors,” Automatica, vol. 17, pp. 831–835, 1981.
P.E. Wellstead and S.P. Sanoff, “Extended Self-tuning Algorithm,” Int. J. Control, vol. 34, pp. 433–455, 1981.
T. Hagglund, “New Estimation Techniques for Adaptive Control,” Ph.D. thesis, Dept. of Automative Control, Lund Institute of Technology, Sweden, 1984.
T. Hagglund, “Adaptive Control of Systems Subject to Large Parameters Changes,” Proc. IFAC World Congress, Budapest, July 1984, pp. 202–207.
T.H. Lee and C.C. Hang, “The Effects of an Unmeasurable Step Disturbance on Recursive Parameter Estimation and Adaptive Control,” Proc. Int. Workshop on Appl. of Adaptive Systems Theory, Yale University, June 1983, pp. 223–227.
T.H. Lee and C.C. Hang, “A Performance Study of Parameter Estimation Schemes for Systems with Unknown Dead Time,” Proc. American Control Conference, Boston, June 1985, pp. 512–516.
T.T. Tay, “Computer Control of a Process with Significant Dead Time,” Final Year Project Report, National Univ. of Singapore, March 1985.
J.S. Moczek, R.E. Otto and T.J. Williams, “Approximation Models for the Dynamic Response of Large Distillation Columns,” Proc. IFAC World Congress, Switzerland, August 1963, pp. 238–248.
K.Y. Leong, C.C. Lim and C.C. Hang, “Auto-tuning of Cost Function Parameters for a Class of Explicit Stochastic Self-tuning Controllers,” Report CI-84–6, National Univ. of Singapore, August 1984.
K.J. Aström and J.J. Anton, “Expert Control,” Proc. IFAC World Congress, Budapest, July 1984, pp. 245–250.
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© 1986 Springer Science+Business Media New York
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Hang, C.C., Lim, K.W., Tay, T.T. (1986). On Practical Implementations of Adaptive Control. In: Narendra, K.S. (eds) Adaptive and Learning Systems. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-1895-9_7
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DOI: https://doi.org/10.1007/978-1-4757-1895-9_7
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