摘要
首先基于有限元建立了转子的动力学模型,然后给出了动平衡机硬支承的设计方法,同时利用有限元方法计算得出了系统的固有频率和各机构间的阻尼系数;然后分析了现有标定方法的特点,提出了优化的标定方法,该方法优于现有标定方法;最后根据处理后振动信号的特点,结合已有数字信号处理算法,提出一种更精确不平衡量提取方法,以提高动平衡机的灵敏度和精度。实验证明,该系统具有高效、高精和稳定的特点。
Firstly the dynamics model of rotor is set up, then the design methods of rigid bearing for dynamic balancing machine is presented, meanwhile the natural frequency of system and damping coefficient between different part of the machine is calculated out; Secondly, after analyzing the disadvantages of existing methods, a optimized calibrating method is advanced; Finally, based on the characteristics of vibrating signals, combined with existing digital signal processing algorithms, a more accurate unbalancing elements extracting algorithm is discussed for enhancing the precision and sensitivity of the machine. Experiments results show that our system is feasible, effective and stability.
出处
《组合机床与自动化加工技术》
2007年第9期5-8,11,共5页
Modular Machine Tool & Automatic Manufacturing Technique
关键词
动平衡
有限元
标定
不平衡量提取
dynamic balancing
fimite element analysis
calibrating
unbalancing element extracting
