基于残周期正弦拟合的振动参数测量  

Vibration parameters measurement method based on partial period sinusoidal curve-fitting

作　　者：梁志国[1] 邵新慧[1] 

机构地区：[1]北京长城计量测试技术研究所计量与校准技术重点实验室,北京100095

出　　处：《振动与冲击》2013年第18期91-94,共4页Journal of Vibration and Shock

摘　　要：针对不足一个波形周期的振动波形参数估计,提出基于残周期正弦波四参数估计测量方法,解决超低频振动参数快速测量分析问题,包括幅度、频率、相位、直流分量等。对随机振动、阻尼衰减振动等非正弦振动测量分析问题,在局部波形近似正弦波假设前提下,利用残周期正弦波形段上模型参数搜索方式,获取非正弦振动幅值、频率、直流分量等参数随时间变化规律曲线。残周期振动与非正弦振动两种波形实验结果验证所述方法的有效性与可行性。所述方法可用于残周期振动波形参数测量分析及非正弦复杂振动波形测量分析。Aiming at a vibration wave parameter estimation with partial periodic waveform, a method based on partial period sinusoidal curve-fitting was presented to realize the rapid measurement of vibration parameters including amplitude, frequency, phase, and bias, etc. for an ultra-low frequency vibration. For a non-sinusoidal vibration, such as, random vibration and damped vibration etc. , based on the assumption that its local part is sinusoidal waves, by using the sinusoidal curve-fitting with partial period and the model parameter searching method, the varying laws of its amplitude, frequency, and bias versus time were obtained. Through a group of tests for both partial period vibration waves and non-sinusoidal vibration waves, both the feasibility and correctness of the proposed method were proved. It was shown that the proposed method can be used to parameter measurement and analysis of partial period vibration waves and complex non-sinusoidal vibration waves.

关 键 词：振动 测量 评价 正弦波拟合 

分 类 号：TB930.12[一般工业技术—计量学]