期刊
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
卷 45, 期 3, 页码 490-494出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/9.847730
关键词
integral control; minimum-phase systems; nonlinear control; observers; robust control
We consider a single-input-single-output (SISO) nonlinear system that has a well-defined normal form with asymptotically stable zero dynamics. Using only knowledge of the relative degree and the sign of the high-frequency gain, we design an output feedback integral controller that asymptotically regulates the output to a bounded time-varying reference signal with a constant limit. We give regional as well as semiglobal results. We also show that, for relative degree-one and two systems, the proposed integral controller reduces to the classical PI and PID controllers, respectively.
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