基于梯形算子的AFM驱动器非对称迟滞性校正
Asymmetric hysteresis calibration of AFM actuator based on keystone operator
查看参考文献22篇
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文摘
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原子力显微镜(AFM)通常采用压电陶瓷(PZT)作为驱动器以实现纳米尺度的观测和操作。然而,PZT 自身的迟滞非线性会对 AFM 观测质量和操作精度产生很大影响。基于 Prandtl-Ishlinskii(PI)模型的前馈控制方法可对 PZT 的迟滞非线性进行补偿,但传统 PI 模型无法消除 PZT 的非对称迟滞性的影响。针对这个问题,提出一种基于梯形算子的非对称迟滞模型,并可用系统辨识方法获取逆模型参数,该方法可有效实现具有非对称迟滞特性驱动器的前馈补偿控制。AFM 系统实验证明,该模型可有效减小非对称迟滞性导致的建模误差,基于该模型的前馈迟滞补偿控制可有效提高 AFM 的扫描成像质量。 |
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其他语种文摘
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Piezoelectric (PZT) actuator is often used in atomic force microscope to realize nano-scale observation and manipulation. However,the intrinsic hysteresis non-linearity of PZT strongly affects observation quality and manipulation accuracy. Prandtl-Ishlinskii (PI) model based feedforward controller can compensate the hysteresis non-linearity of PZT,but the conventional PI model cannot eliminate the effect of asymmetric hysteresis. Aiming to solve the problem,an asymmetric hysteresis model based on keystone operator is proposed. Parameters of inverse model are obtained through system identification method,and the feedforward calibration is implemented based on the inverse model. Experiment in AFM system shows that modeling errors caused by asymmetric hysteresis are effective reduced by the proposed hysteresis model,and imaging quality of the custom-built AFM is improved by feedforward hysteresis compensation based on the model. |
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来源
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仪器仪表学报
,2015,36(1):32-39 【核心库】
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关键词
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非对称 PI 模型
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梯形算子
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原子力显微镜
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压电陶瓷
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迟滞性前馈校正
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逆模型直接辨识
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地址
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中国科学院沈阳自动化研究所, 沈阳, 110016
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0254-3087 |
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学科
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机械、仪表工业;自动化技术、计算机技术 |
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基金
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国家自然科学基金青年基金
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国家863计划
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中国科学院科研装备研制
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文献收藏号
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CSCD:5353294
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