水电机组轴心轨迹HU氏不变矩与仿射不变矩特征量对比  

The Comparison of the Shaft Orbit's HU's Moment Invariants and Affine Invariant Moments

作　　者：刘海艳[1] 郑慧娟[1] 刘果[1] 

机构地区：[1]国网电力科学研究院/南京南瑞集团公司,江苏省南京市210003

出　　处：《水电与抽水蓄能》2016年第3期17-20,43,共5页Hydropower and Pumped Storage

摘　　要：为了提高发电机转子轴心轨迹形状自动识别的精度,寻求更高效率的识别方法,本文通过仿真对HU氏不变线矩和仿射不变线矩特征量进行比较,分别计算了仿真的轴心轨迹图形在相似变换和仿射变换下的HU氏改进不变线矩与仿射不变线矩特征向量,并将结果与原图形对应的特征向量进行对比,结果表明,HU氏不变线矩在轴心轨迹自动识别研究中存在一定的应用局限性,而仿射不变线矩则具有更好的识别能力,为转子轴心轨迹形状自动识别研究提供了理论依据。In order to improve the automatic identification accuracy of the shape of generator rotor shaft orbits and seek for an identification method of higher efficiency,this paper compares HU’s moment invariants and affine invariant moments by simulation,and respectively calculates the HU’s moment invariants and affine invariant moments of simulation example in the case of similar transformation and non-similar transformation,and then compares the results with the feature vector of the original shaft orbit. The simulation results shows that HU’s moment invariants have some application limitations in automatic identification and affine invariant moments have better recognition ability,which provides a reference for automatic identification of the rotor shaft orbit’s shape.

关 键 词：轴心轨迹 自动识别 HU氏不变矩 仿射不变矩 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]