基于分析传函的有源力控FLMS算法研究

针对结构振动和声辐射有源控制中对误差传函现有建模方法的不足 ,本文对该系统的物理通道进行了分析建模 ,形成了基于分析传函模型的 FLMS算法 ,该分析传函模型中充分包含了结构的振动模态信息 ,无论激励力源是单频还是宽频激励力源 ,该模型都可以在实施 FLMS算法之前确定所需参数。随后在该算法的计算机模拟实验中 ,通过与时延估计法的比较 ,表明该方法扩大了步长因子的取值范围 ,扩大了收敛域 ,该模型的建立为有效实施有源控制的自适应算法提供了一条新的途径。

Study on the FLMS Algorithm of Active Force Control Based on Analytical Transform Function Model

By analysing the defect of current modeling method for error path of active force control, this paper develops a FLMS algorithm, which is based on the analytical transform function model of the physical channel of active force control system. This model contains the information of structural vibration. Whenever the structure stimulated either by single frequent or wideband signal, this model can easily offer all the parameters required by the FLMS algorithm. The computer simulation indicates that the system has a strong stablity and widened the convergence region. And thus the establishment of this model provides a new method for the adaptive control algorithm of active force control system.