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A maximum principle is proved for a large class of free time optimal control problems with unilateral state constraints. The hypotheses we invoke require the data to be merely measurable in the time variable. They contrast with hypotheses of earlier theory, where typically the data is required to be as regular in the time variable as in the state variable. Our new conditions incorporate a generalized...
Any discrepancy between a process and the associated model used in control design will compromise closed-loop performance. In almost all current techniques to detect model-plant mismatch in model-based control systems there must be some sort of external excitation to overcome the effect of unmeasured disturbances on closed-loop signals. In this paper, we propose a novel technique that enables us to...
Model-based controllers based on incorrect estimates of the true plant behaviour can be expected to perform badly. This work quantifies the performance deterioration for a certain class of MIMO systems. Performance is measured using a Minimum Variance index and a closely related user-specified criterion. Under reasonable conditions, the performance of each output component in a MIMO system can be...
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