Detecting Nano-Scale Vibrations in Rotating Devices by Using Advanced Computational Methods

Detecting Nano-Scale Vibrations in Rotating Devices by Using Advanced Computational Methods

This paper presents a computational method for detecting vibrations related to eccentricity in ultra precision rotation devices used for nano-scale manufacturing. The vibration is indirectly measured via a frequency domain analysis of the signal from a piezoelectric sensor attached to the stationary component of the rotating device. The algorithm searches for particular harmonic sequences assoc...

Advanced Methods for Controlling Untethered Magnetic Devices Using Rotating Magnetic Fields

This dissertation presents results documenting advancements on the control of untethered magnetic devices, such as magnetic “microrobots” and magnetically actuated capsule endoscopes, motivated by problems in minimally invasive medicine. This dissertation focuses on applying rotating magnetic fields for magnetic manipulation. The contributions include advancements in the way that helical micros...

Cyclostationarity in Rotating Machine Vibrations

The vibrations of rotating machinery are produced by a combination of periodic and random processes due to the machine's rotation cycle and interaction with the real world. The combination of such components can give rise to signals which have periodically time-varying ensemble statistics and are best considered as cyclostationary. In this paper, second-order cyclic statistical methods are desc...

Computational Nano-mechanics and Multi-scale Simulation

This article provides a review of the computational nanomechanics, from the ab initio methods to classical molecular dynamics simulations, and multitemporal and spatial scale simulations. The recent improvements and developments are briefly discussed. Their applications in nanomechanics and nanotubes are also summarized.

Nano-Devices Using Block-Copolymers