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超磁致伸缩作动器的率相关Hammerstein模型与H∞鲁棒跟踪控制 被引量:14

Rate-dependent Hammerstein Model and H_∞ Robust Tracking Control of Giant Magnetostrictive Actuators
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摘要 利用Hammerstein模型对超磁致伸缩作动器(Giant magnetostrictive actuators,GMA)的率相关迟滞非线性进行建模,分别以改进的Prandtl-Ishlinskii(Modified Prandtl-Ishlinskii)模型和外因输入自回归模型(Autoregressive model with exogenous input,ARX)代表Hammerstein模型中的静态非线性部分和线性动态部分,并给出了模型的辨识方法.此模型能在1~100Hz频率范围内较好地描述GMA的率相关迟滞非线性.提出了带有逆补偿器和H∞鲁棒控制器的二自由度跟踪控制策略,实时跟踪控制实验结果证明了所提策略的有效性. A Hammerstein model is proposed to model the rate-dependent hysteresis nonlinearity of giant magnetostric- tive actuators (GMA). A modified Prandtl-Ishlinskii (MPI) model and an autoregressive model with exogenous input (ARX) are used to represent the static nonlinear part and the linear dynamic part of the Hammerstein model, respec- tively. A model identification method is also given. The proposed model can describe the rate-dependent hysteresis of GMA from 1 Hz to 100 Hz well. A two DOF control system with an inverse compensator and an H∞ robust controller is designed for tracking control. Real-time trajectory tracking control results show that the proposed strategy is effective.
出处 《自动化学报》 EI CSCD 北大核心 2014年第2期197-207,共11页 Acta Automatica Sinica
基金 国家自然科学基金重点项目(91016006,91116002) 中央高校基本科研业务费专项资金(30420111109,30420120305,SWJTU11ZT06) 新能源电力系统国家重点实验室开放课题(LAPS13019) 高铁联合基金(U1134205)资助~~
关键词 磁致伸缩作动器 率相关迟滞非线性 HAMMERSTEIN模型 MPI模型 H∞鲁棒控制 Giant magnetostrictive actuators (GMA), rate-dependent hysteresis nonlinearity, Hammerstein model, mod- ified Prandtl-Ishlinskii (MPI) model, H∞ robust control
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