基于直接泄漏滤波X最小均方算法的海水泵振动控制应用研究

中文摘要: 在海水泵的线谱振动自适应控制中，由于环境等条件因素的影响，获取的参考信号频与线谱振源信号频率往往存在着偏差。该频率偏差的存在往往造成自适应主动控制算法性能下降。针对这个问题，通过结合一种自适应更新参考信号的方法，提出了基于FXLMS的反馈式线谱振动自适应主动控制算法。在参考信号生成中，通过一种几何关系来进行参考信号的相位更新，并基于最小均方误差方法，来实现参考信号频率对应的相关系数的更新；为验证该方法的有效性，进行了仿真和试验。仿真结果表明，该方法能够在参考信号频率与振源信号频率存在偏差的情况下，通过自适应调节参考信号频率，取得良好的线谱振动自适应控制效果。进行了基于水泵试验台架的主动控制试验研究，检验该自适应算法控制性能。试验结果表明，该方法能够在参考信号频率与线谱振动频率存在偏差的情况下，进行有效的线谱振动自适应控制。
Abstract:Performance of adaptive active vibration control algorithm may degrade if there exists frequency error between the reference signal and primary vibration with multi-line spectra due to the limited situation in the application of active vibration control of water pump. To tackle this problem, an active vibration control algorithm is proposed based on the adaptive feedback FXLMS (filtered-X least mean square) algorithm with adaptive self-generating reference signal. The phase of the reference signal was updated based on geometry relation, besides the frequency of reference signal was estimated by related coefficient based on least mean square method. Simulation and experiment was conducted to validate the effectiveness of the proposed method. Simulation results validates that the algorithm could achieve effective performance by adaptively regulating the frequency of reference signal with the existence of frequency error between the reference signal and primary signal. Experiment of active vibration control of water pump confirms the effective performance of the proposed algorithm.