关键词: 视觉测力, 伪Zernike矩不变量, 支持向量机, 多类分类

Abstract:  A new visual force measurement method was proposed to measure applied forces through analyzing pseudo Zernike moment invariants. First, a feature vector of pseudo Zernike moment invariants is used to describe the deformed microgripper shape in microassembly. This description indicates a function between the applied force and the feature vector of moment invariants. Then, a training set is established, where the input and the output represent the feature vector of moment invariants and the corresponding known applied force, respectively. Finally, a support vector machine (SVM) compares the feature vectors in the testing set with those ones in the training set, implements multiclass classification and estimates unknown applied forces in the testing set. The experiments on four different microcantilevers validate the proposed method.  

Key words: visual force measurement, pseudo Zernike moment invariants, support vector machine, multi-class classification