An experimental investigation of analog delay generation for dynamic control of microsensors and atomic force microscopy

We present an implementation of pure-time-delay generation in analog signals located in the kilo-Hertz frequency band. The controlled constant delays that are produced engage in a feedback system to investigate the dynamic response of microcantilevers. Delayed systems offer a vast richness of eigenv...

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Published in:Ultramicroscopy 2007-10, Vol.107 (10), p.1020-1026, Article 1020
Main Authors: Yi, D., Passian, A., Lereu, A.L., Thundat, T.
Format: Article
Language:English
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Atomic force microscopy
Delayed oscillations
Dynamic control
Feedback
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description We present an implementation of pure-time-delay generation in analog signals located in the kilo-Hertz frequency band. The controlled constant delays that are produced engage in a feedback system to investigate the dynamic response of microcantilevers. Delayed systems offer a vast richness of eigenvalues resulting in the possibility of excitations at frequencies other than that of the fundamental mode. Different cantilever actuation and delay generation approaches are investigated and compared, and detailed experimental observation of the dynamic response of the system is presented. Based on our results, an acoustic excitation is devised that may be used as an efficient sensor.
doi_str_mv 10.1016/j.ultramic.2007.03.013
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subjects Atomic force microscopy
Delayed oscillations
Dynamic control
Feedback
title An experimental investigation of analog delay generation for dynamic control of microsensors and atomic force microscopy
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