摘要
作动器是振动主动控制系统中的重要部件,它的选择将对振动主动控制系统的控制效果具有重大的影响。对一种微型共振音响作动器的响应幅值线性度、响应相移线性度和在刚柔性基础上的频响函数曲线进行了实验研究,并基于LabVIEW平台对实验的结果进行处理分析,最后对研究结果进行了详细的总结。结果表明：1）在不同频率下,共振音响的功放大小是不一样的。在0-0.3V各频率下,驱动器输出的力响应幅值大小是随着输入幅值呈线性变化的,在大于0.3V的区间,是呈非线性变化的。2）在同一输入电压幅值的情况下,响应相移（相位差）随着频率的增大而减小。3）在300 Hz后输出的响应幅值趋于稳定,约为2N。
Actuators are important component in active vibration control system,the choice of which is of significant influence on the effectiveness of the whole active vibration control system.In this paper,a type of micro vibration speaker actuator＇s characteristics was studied.The linearity of the amplitude and the phase in response as well as the FRF curve based on the rigid/flexible foundation were showed in the paper.Besides,the data processing of result has been done based on the LabVIEW.Finally,the paper made some useful conclusions of the mini vibration speaker＇s in detail.The result shows：1）the performance of its power amplifier was different in the case of different frequency.The amplitude in response changed linearly along with the amplitude of sinusoidal voltage ranging from 0 to 0.3 Vin various frequencies,which changed nonlinearly when the voltage was greater than 0.3V.2）When the voltage was constant,the phase difference was getting small while the frequency was getting high.3）The amplitude in response was getting constant when the frequency was greater than 300 Hz.The constant amplitude in response was 2N.
出处
《国外电子测量技术》
2015年第8期55-60,共6页
Foreign Electronic Measurement Technology
基金
机械结构力学及控制国家重点实验室(南京航空航天大学)自主研究课题(0115K01)
江苏高校优势学科建设工程基金资助
关键词
共振音响
作动器
幅值线性度
相移线性度
频响函数
vibration speaker
actuator
the linearity of amplitude
the linearity of phase
FRF
