摘要
为了研究基于弹性基座的主被动隔振系统的隔振性能,将弹性基座简化为一个大刚度弹簧连接的质量单元,建立主被动隔振系统的三自由度模型和运动方程,推导主通道传递函数和次级通道传递函数的频域表达式。结合Fx LMS自适应控制算法,在Matlab/Simulink中建立该隔振系统模型,对上层机械设备施加含白噪声的多频正弦激励力,进行主动隔振研究。分析基座刚度对主通道、次级通道传递函数的幅频特性,振动线谱控制效果以及主动控制力的影响。结果发现较大的基座刚度有利于提高振动线谱控制效果,也有利于降低主动控制力需求。
The isolation performance of the passive-active vibration isolation system on a flexible base is investigated.The flexible base is simplified as a mass element connected to a spring with large stiffness.The3-DOF model of the passiveactive vibration isolation system on the flexible base is established and the corresponding dynamic equation is developed.The transfer functions of primary path and secondary path are derived in the frequency domain.Combined with FxLMS adaptive algorithm,the model of the vibration isolation system is built by means of Matlab/Simulink software.The multifrequency sinusoidal exciting force containing white noise is added to the system for active vibration isolation analysis.Influences of the base stiffness on the amplitude-frequency characteristics of the transfer functions of the primary and secondary paths,vibrational spectral line control performance and active control force are analyzed.It is found that large base stiffness is beneficial for improving vibrational spectral line control performance and reducing active control force demand.
作者
张能
何琳
李彦
ZHANG Neng;HE Lin;LI Yan(Institute of Noise and Vibration, Naval University of Engineering, Wuhan 430033, China;National Key Laboratory on Ship Vibration and Noise, Wuhan 430033, China)
出处
《噪声与振动控制》
CSCD
2017年第3期62-65,共4页
Noise and Vibration Control
关键词
振动与波
弹性基座
主被动隔振
FXLMS算法
振动线谱控制
幅频特性
vibration and wave
flexible base
passive- active vibration isolation
FxLMS algorithm
vibrational spectral line control
amplitude-frequency characteristic
