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An input design method is presented to actively isolate faults for polynomial or rational systems in the presence of unknown-but-bounded uncertainties. For active fault isolation, the input is required to lead to outputs consistent with at most one fault model despite disturbances, measurement noise, and parametric uncertainty. This task is posed in terms of a bilevel optimization problem where the...
The selection of the control structure, which is a specification of the interconnection of measurements, exogenous inputs, and manipulated variables, is a critical step in the design of a control system. This paper presents a general internal model control structure with multiple degrees-of-freedom in which each controller can be independently designed for stable systems. The control system is shown...
Of special industrial interest is the cross-directional control of continuous coating processes, where the cross-direction refers to the direction perpendicular to the substrate movement. The objective of the controller is to maintain a uniform coating under unmeasured process disturbances based on assumptions relevant to coating processes found in industry. A model for control design is developed...
Robust control laws are presented for an undamped pair of coupled manes with a noncolocated sensor and actuator. This simple problem captures many of the features of more complex aircraft and space structure vibration control problems. The control problem is formulated in the structured singular value framework, which addresses the stability robustness to parameter variations directly. Controllers...
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