光学精密工程2009，Vol.17Issue(10)：2600-2605,6.
三阶非线性Volterra模型的自适应快速辨识
Fast adaptive identification of third-order nonlinear Volterra model
摘要
Abstract
As part of the RFID flip chip package development,the high speed manipulator has obvious nonlinear and time-variable characters,so a nonlinear adaptive inverse control is needed.The key to this method is to identify the high speed manipulator by using a third-order Volterra nonlinear model in limited time and with sufficient accuracy.However,it is hard to satisfy real-time requirement with a conventional method.This paper proposes a fast identification algorithm to resolve the problem.Firstly,a high-order input vector is constructed from a low-order input vector according to the structural character.Next,it speeds up the estimates of high-order kernels based on low-order kernels according to their correlation.Finally,it uses a linear variable step-size LMS strategy in a nonlinear algorithm and proves convergence with the Lyapunov global stability theorem.In experiments with a manipulator based on conventional and proposed methods,respectively,the results show that this algorithm reduces the identification time from 100 ms to 30 ms,improves convergent speed 3.3 times and reduces misadjustment by 93.3%,as well as having great precision.It can satisfy both require-merits of real-time and identification precision.关键词
非线性Volterra模型/自适应辨识/快速算法Key words
nonlinear Volterra model/adaptive/identification/fast algorithm分类
信息技术与安全科学引用本文复制引用
刘立峰,汤建华,田兴志..三阶非线性Volterra模型的自适应快速辨识[J].光学精密工程,2009,17(10):2600-2605,6.基金项目
国家863高技术研究发展计划资助项目(No.2007BAQ01750) （No.2007BAQ01750）
