A Multi-Loop Hysteresis Model of Piezo Actuator Based on LS-SVM

作者：Yang Xue feng^*; Li Wei; Wang Yu qiao; Su Xiu ping

来源：Asia Simulation Conference/7th International Conference on System Simulation and Scientific Computing, 2008-10-10 To 2008-10-12.

DOI：10.1109/asc-icsc.2008.4675603

In order to approximate the behavior of hysteresis nonlinearity which often severely limits the performance of system and improve the prediction accuracy or classical Preisuch model (CPM), a Least Squares Support Vector Machine (LS-SVM) based model Is presented in this paper. According to the geometric characteristics of multi-loop hysteresis, the Input voltage sequences was combined with output stroke sequence and expand to a matrix as the Input of LS-SVM. Then the multi-valued mapping of hysteresis was transformed to one-to-one mapping which enable LS-SVM to approximate the behavior of hysteresis. The prediction accuracy Is Improved effectively on the condition of finite samples and the default of CPM was avoided. Results of simulation and experiments show that the proposed hysteresis model can exactly describe and predict the multi-valued hysteresis feature compare with billnear interpolation and has the better generalization ability.

• 出版日期2008
• 单位中国矿业大学（北京）