TY - JOUR
T1 - L 1 adaptive sampled-data control for uncertain multi-input multi-output systems
AU - Jafarnejadsani, Hamidreza
AU - Lee, Hanmin
AU - Hovakimyan, Naira
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/5
Y1 - 2019/5
N2 - This paper develops a sampled-data (SD) controller for uncertain multi-input multi-output (MIMO) systems, possibly with non-minimum phase zeros, using the L 1 adaptive control architecture. The proposed controller compensates for disturbances and uncertainties within the bandwidth of a low-pass filter. Sufficient conditions for robust stability are obtained for the closed-loop system with SD controller, where the input/output signals are held constant over a sampling period. It is shown that the hybrid closed-loop system can recover the performance of a continuous-time reference system as the sampling time of the SD controller tends to zero. Simulation examples are provided to validate the theoretical findings.
AB - This paper develops a sampled-data (SD) controller for uncertain multi-input multi-output (MIMO) systems, possibly with non-minimum phase zeros, using the L 1 adaptive control architecture. The proposed controller compensates for disturbances and uncertainties within the bandwidth of a low-pass filter. Sufficient conditions for robust stability are obtained for the closed-loop system with SD controller, where the input/output signals are held constant over a sampling period. It is shown that the hybrid closed-loop system can recover the performance of a continuous-time reference system as the sampling time of the SD controller tends to zero. Simulation examples are provided to validate the theoretical findings.
KW - Digital controller
KW - Disturbance compensation
KW - L adaptive sampled-data control
KW - Multi-input multi-output system
KW - Non-minimum-phase system
KW - Output-feedback
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U2 - 10.1016/j.automatica.2019.01.007
DO - 10.1016/j.automatica.2019.01.007
M3 - Article
AN - SCOPUS:85061929348
SN - 0005-1098
VL - 103
SP - 346
EP - 353
JO - Automatica
JF - Automatica
ER -