Abstract
Shock response spectra are applied to the problem of controlling flexible structures. It is shown using computer simulations that specific command times in motion specifications will produce a minimum of first mode vibration in a driven flexible member. A simple formula for determining the most favorable positioning command time is derived from response spectra plots generated for commonly used motion com mand profiles. A feed-forward control strategy for conditioning position commands is presented based on the formula, and the approach is demonstrated using a damped single-degree-of-freedom model of a flexible structure.
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