A Feedfordward Adaptive Controller to Reduce the Imaging Time of Large-Sized Biological Samples with a SPM-Based Multiprobe Station

Sensors

Jorge Otero¹  Hector Guerrero²  Laura Gonzalez² 

[1] SIC-BIO, Bioelectronics and Nanobioengineering Group, Department of Electronics, University of Barcelona, Marti i Franques, 1, 08028, Barcelona, Spain;

关键词: scanning probe microscopy;    feedforward control;    adaptive control;    nanorobotics;    fast imaging;    biological samples;    bacteria;   

DOI  :  10.3390/s120100686

来源: mdpi

【 摘 要 】

The time required to image large samples is an important limiting factor in SPM-based systems. In multiprobe setups, especially when working with biological samples, this drawback can make impossible to conduct certain experiments. In this work, we present a feedfordward controller based on bang-bang and adaptive controls. The controls are based in the difference between the maximum speeds that can be used for imaging depending on the flatness of the sample zone. Topographic images of Escherichia coli bacteria samples were acquired using the implemented controllers. Results show that to go faster in the flat zones, rather than using a constant scanning speed for the whole image, speeds up the imaging process of large samples by up to a 4× factor.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland