an:01610344
Zbl 0979.93069
Khammash, M. H.; Zou, L.
Analysis of steady-state tracking errors in sampled-data systems with uncertainty
EN
Automatica 37, No. 6, 889-897 (2001).
00074995
2001
j
93C57 93B51
sampled data systems; robust control; robust tracking; steady-state tracking
The paper deals with robust steady-state \(\varepsilon\)-tracking of sampled data systems in the presence of structured norm bounded time-varying finite memory uncertainty. An appropriate steady-state norm has been defined, and a steady-state norm matrix has been constructed based on this norm. Exact conditions for robust \(\varepsilon\)-tracking of sampled data systems were derived in terms of the spectral radius of this matrix. The results show that even if zero steady-state tracking can be achieved for the nominal system, the steady-state tracking error may no longer be zero in the presence of time-varying uncertainty in the system, and that it can be arbitrarily large. An example for computing the steady-state tracking error for a sampled data system with uncertainty is provided.
Svitlana P.Rogovchenko (Famagusta)