CAJ | 학술논문

多参考点最小二乘复频域法(p-LSCF)是近几年来提出的宽频带模态参数识别算法,该方法在抗干扰能力、识别密集模态以及处理大阻尼复杂结构方面具有非常好的特性.为了提高模态参数的识别速度,采用FFT运算实现了该识别方法的快速计算.最后通过仿真算例与实测算例进行验证.结果表明:在不损失精度的情况下,能够提高参数识别速度.
다삼고점최소이승복빈역법(p-LSCF)시근궤년래제출적관빈대모태삼수식별산법,해방법재항간우능력、식별밀집모태이급처리대조니복잡결구방면구유비상호적특성.위료제고모태삼수적식별속도,채용FFT운산실현료해식별방법적쾌속계산.최후통과방진산례여실측산례진행험증.결과표명:재불손실정도적정황하,능구제고삼수식별속도.
A poly-reference least square complex frequency-domain is a broadband modal identification al-gorithm developed in recent years.It has many advantages in handling high noisy data,closely coupled modes and high damping structure.To improve modal parameter identification,a fast implementation of p-LSCF is proposed by using FFT algorithm.A simulation case and an application case are used to vali-date the fast implementation.Results show that the fast implementation can improve the modal identifi-cation without the accuracy loss.