Minimizing the effect of out of bandwidth modes in truncated structure models

The modal analysis approach to modeling of structures and acoustic systems results in infinite-dimensional models. For control design purposes, these models are simplified by removing higher frequency modes which lie out of t he bandwidth of interest. Truncation can considerably perturb the in-bandwi dth zeros of the truncated model. This paper suggests a method of minimizin g thr effect of the removed higher order modes on the low frequency dynamic s of the truncated model by adding a zero frequency term to the low order m odel of the system. [S0022-0434(00)01501-X].