作者: M. S. Rana , H. R. Pota , I. R. Petersen , None
DOI: 10.1109/TNANO.2014.2309653
关键词: Raster scan 、 Performance improvement 、 MIMO 、 Model predictive control 、 Materials science 、 Atomic force microscopy 、 Electronic engineering 、 Optics 、 Capacitive sensing 、 Bandwidth (signal processing) 、 Scanner
摘要: One of the key barriers to an atomic force microscope (AFM) achieving high scanning speeds is its use traditional zig-zag raster pattern technique. In this paper, we consider a high-speed spiral imaging technique with improved multi-input multi-output (MIMO) model predictive control (MPC) scheme damping compensator for faster by AFM. The controller’s design based on identified MIMO AFM’s piezoelectric tube scanner (PTS) and it achieves higher closed-loop bandwidth, significant resonant mode PTS, reduces cross-coupling effect between PTS’s axes. spirals produced have particularly narrow-band frequency measures which change slowly over time, thereby making possible achieve tracking continuous rather than being restricted back forth motion scanning. To evaluate performance improvement using proposed scanning, experimental comparison scanned images those open-loop condition performed. Experimental results show that, method, speed significantly increased up 180 Hz.