基于角加速度的复合计算阶次跟踪方法  

Hybrid Computed Order Tracking Method Based on Angular Acceleration

作　　者：汤宝平[1] 何启源[1] 魏玉果[2] 邓蕾[1] 

机构地区：[1]重庆大学机械传动国家重点实验室 [2]中国电波传播研究所第二十二所,青岛266107

出　　处：《机械工程学报》2008年第8期143-147,共5页Journal of Mechanical Engineering

基　　金：国家自然科学基金(50405009，50735008);霍英东教育基金会11届青年教师基金(111057);长江学者和创新团队发展计划(IRT0763)资助项目

摘　　要：针对旋转机械振动信号分析中的计算阶次跟踪方法的局限性,提出基于匀角加速度方程的计算阶次跟踪方法,并将该方法与线性插值、三次样条插值等方法复合在一起,根据旋转机械转角加速度的大小,选择相应的方法进行阶次重采样,实现基于角加速度的复合计算阶次跟踪。在转速变化缓慢时,采用线性插值方法;在转速变化比较大时,采用匀角加速度方程方法;在转速变化剧烈时,采用三次样条插值的方法。复合计算阶次跟踪方法兼顾计算的效率和精度,对某滤波减速器性能试验台中交流伺服电动机在升、降速阶段引起的振动实测试验结果表明了此方法的正确性机可行性。To overcome the limitation of computed order tracking in vibration signal analysis for rotating machine, the hybrid computed order tracking method based on constant angular acceleration is proposed. Combined with the linear interpolation method, the constant angular acceleration equation and the cubic spline interpolation method, the proposed method can choose the corresponding method to implement order re-sampling according to the change of angular acceleration of rotating machine, which balances the efficiency and accuracy of the arithmetic. When the change of rotary speed is slow, the linear interpolation method is adopted. When the change of rotary speed is great, the constant angular acceleration equation is adopted. When the change of rotary speed is acute, the cubic spline interpolation method is adopted. The experimental results show that the proposed method is feasible and effective.

关 键 词：角加速度 匀角加速度方程 三次样条插值 计算阶次跟踪 

分 类 号：TH17[机械工程—机械制造及自动化]