论文部分内容阅读
为了更有效地控制舰船动力机械宽频和低频线谱振动的传递,提出了一种将磁悬浮作动器与气囊隔振器集成应用的磁悬浮-气囊主被动混合隔振装置。通过对磁悬浮作动器机电耦合特性和混合隔振系统动力学特性的分析研究,确定了满足线谱振动控制要求和满足混合隔振装置性能要求的参数设计方法。针对主动控制时,FxLMS(filtered-x least mean square)算法在小阻尼系统上需用高阶FIR滤波器建模,运算量大的问题,提出了分频段控制的改进FxLMS算法,并有效地解决了作动器的非线性效应问题。样机实验结果表明:理论分析是正确的,该项技术控制力需求小,装置稳定性好,具有优良的宽频隔振和低频线谱振动控制效果。
In order to control the transmission of wide-band and low-frequency spectrum vibrations of ship’s power machinery more effectively, a magnetic-air-bag active-passive hybrid vibration isolation device integrating magnetic suspension actuator with airbag vibration isolator is proposed. Through the analysis of the electromechanical coupling characteristics of the magnetic suspension actuator and the dynamic characteristics of the hybrid vibration isolation system, the parameter design method to meet the requirements of the line vibration control and to meet the performance requirements of the hybrid vibration isolation device is determined. For the active control, the FxLMS (filtered-x least mean square) algorithm requires high-order FIR filter modeling and a large amount of computation on a small damping system. An improved FxLMS algorithm for sub-band control is proposed and effectively solved Actuator nonlinear effects. The experimental results of the prototype show that the theoretical analysis is correct, the control force of the technology is small, the stability of the device is good, and the control effect of wide-band vibration isolation and low-frequency line spectrum vibration is excellent.