Showing papers on "Model order reduction published in 1979"

Modal truncation for flexible spacecraft

Abstract: A hierarchy of dynamical models is identified for large nonspinning flexible spacecraft. At each level, techniques are explained for reducing the order of the model before proceeding to the next level. These techniques have in common the presupposition that the model has at each stage been expressed in terms of its natural modes, some of which can, if necessary, be deleted based on the evaluation of one or more of the quantitative criteria proposed. These criteria are based on insights from several different perspectives, including inertial completeness, frequency relationships, controllability and observability considerations, and the contributions of individual modes to a mission-dependent cost functional (modal cost analysis). With the aid of these criteria, many of the engineering judgments related to model order reduction can be made on a rigorous quantitative basis.

Walsh function approach for simplification of linear systems

Abstract: A new approach for model order reduction of high order systems using Walsh functions is presented. The approach is based on minimizing the integral of the squared error between the impulse responses of the high order system and a low order model.