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29th IEEE Conference on Decision and Control
Linear control design methodologies for flexible structures require the nominal structural model to be formulated as a linear, time invariant system. Although this model may describe the physical system accurately, any model is only an approxima tion of the physical system. There is always some uncertainty present even when the underlying process is essentially linear. This uncertainty may be due to incomplete knowledge of the physical paramcters, neglected high frequency dynamics or invaliddoi:10.1109/cdc.1990.203334 fatcat:7rcqbxjja5h6vnrgly37zalcsy