Output feedback sliding-mode control based on dynamic-gain observer for non-minimum phase systems. (English) Zbl 1501.93063
Summary: This paper considers the output feedback sliding-mode control for an uncertain linear system with unstable zeros. Based on a frequency shaping design, a dynamic-gain observer is used for state estimation of an uncertain system. This paper confirms that (1) state estimation is globally stable in a practical sense, (2) the resultant error can be arbitrarily small with respect to the system uncertainties, and (3) the proposed sliding-mode control can drive the uncertain system state into an arbitrarily small residual set around the origin, such that the size of residual set is controlled by the filter design. Moreover, the proposed control design is inherently robust to measurement noise; the effect of measurement noise can effectively be attenuated without any additional work.
MSC:
| 93B52 | Feedback control |
| 93B12 | Variable structure systems |
| 93B53 | Observers |
| 93C41 | Control/observation systems with incomplete information |
| 93C05 | Linear systems in control theory |
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