Design of excitation signals for the restoring force surface method
Design of excitation signals for the restoring force surface method
复制标题
恢复力面法激励信号设计
DOI：
10.1006/mssp.1995.0012
复制
发表时间：
1995
影响因子：
8.4
通讯作者：
J. Schoukens
中科院分区：
文献类型：
--
作者：
S. Duym;J. Schoukens
在经典的恢复力法中，作用在机械系统上的非线性力被拟合成一系列标准函数。为了保证拟合的质量，需要状态轨迹样本点在状态平面上的足够均匀的分布。在本文中，它表明，一个统一的覆盖状态平面可以得到使用周期性的运动信号（即位移，速度和加速度）与用户指定的幅度谱，通过适当的选择相关联。通过实施迭代修正激振力谱的软件反馈，可以将这些周期性运动信号施加到机械结构上。在本文中，它将显示如何优化的相位谱，以便获得均匀的覆盖。
Abstract In the classical Restoring Force method the non-linear force, acting on a mechanical system, is fitted to a series of standard functions. In order to guarantee the quality of the fit a sufficiently uniform distribution of the state trajectory sample points over the state plane is needed. In this paper, it is shown that a uniform covering of the state plane can be obtained using a periodic kinematic signal (i.e. displacement, velocity and acceleration) with a user specified amplitude spectrum by making a proper choice for the associated phases. These periodic kinematic signals can be imposed on the mechanical structure by implementing a software feedback which corrects the excitation force spectrum iteratively. In this paper it will be shown how to optimise the phase spectrum so that a uniform coverage is obtained.