Influence of modeling error on noise reduction performance of active noise control systems using filtered-X LMS algorithm.

摘要: This paper investigates the influence of modeling error that is difference characteristic between secondary path and its model on behavior filtered-X LMS adaptive filter. The equations describe filter are presented at first, considered based equations. Both stability noise reduction performance discussed, particularly, we discussed in detail under condition has rarely been considered. In addition, conditions required for maintaining also presented. results theoretical consideration confirmed by computer simulation which impulse responses measured a vehicle cabin used. Through investigation, it proved algorithm may be stable except substantial case, will inferior to ideal general. These suggest should use on-line identification system when time variant.