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This paper proposes an LMI-based design algorithm for saturating output feedback controllers that are robust with respect to parametric uncertainties in the system model. The algorithm is based on the determination of a feasible solution by solving a conservative relaxation of the problem. This feasible solution is then optimized using a procedure known as path following, which sequentially optimizes...
The analysis of the EKF error sequence in is expanded to the case with non-vanishing perturbations. The robust stability of NMPC and EKF pair is established. In addition, we propose an output-feedback NMPC formulation based on both the prior and posterior errors of the EKF to achieve offset-free regulatory control behavior.
In this paper, the design problem of output feedback sliding mode controls (OFSMCs) is considered for a class of systems with mismatched uncertainties. Based on the stability analysis result in the sliding mode (which has been obtained by the author in (Dong, 2006)), an OFSMC is constructed so that the prescribed system can be driven to the switching surface in finite time and stay on it thereafter...
In this paper, a nonlinear output feedback control mechanism is developed to address the attitude tracking problem of a rigid spacecraft system which contains uncertainty associated with dynamic model and is under the effect of external disturbance. The control strategy is based on limited assumption on the system dynamics. A set of filters are developed to compensate for the unmeasurable spacecraft's...
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