Searched for: author:"Goosen, J.F.L."
(1 - 20 of 41)

Pages

document
Keyvani Janbahan, A. (author), Tamer, M.S. (author), van Wingerden, J.W. (author), Goosen, J.F.L. (author), van Keulen, A. (author)
Many investigations have focused on steady-state nonlinear dynamics of cantilevers in tapping mode atomic force microscopy (TM-AFM). However, a transient dynamic model—which is essential for a model-based control design—is still missing. In this paper, we derive a mathematical model which covers both the transient and steady-state behavior....
journal article 2019
document
van Bergen, Thibaut (author), Ishiyama, Rui (author), Makino, Kengo (author), Kudo, Yuta (author), Takahashi, Toru (author), Goosen, J.F.L. (author)
This paper presents a novel framework and its prototype tool for indexing and retrieving specific fragments of voice recordings obtained during discussions about physical objects such as text documents, pictures, or 3D models. When a specific part of an object is mentioned, it is tagged with an ink dot that is immediately registered in a...
conference paper 2019
document
Sajadi, B. (author), Goosen, J.F.L. (author), van Keulen, A. (author)
Electrostatic instability is one of the main features of many electrostatic MEMS and NEMS devices. In this paper, we investigate how the electrostatic instability of a plate-like electrode can be affected by a differential pressure. The results of this study indicate that the presence of differential pressure can have a significant influence...
journal article 2018
document
Keyvani Janbahan, A. (author), Sadeghian, Hamed (author), Goosen, J.F.L. (author), van Keulen, A. (author)
The origin of amplitude reduction in Tapping Mode Atomic Force Microscopy (TM-AFM) is typically attributed to the shift in resonance frequency of the cantilever due to the nonlinear tip-sample interactions. In this paper, we present a different insight into the same problem which, besides explaining the amplitude reduction mechanism, provides...
journal article 2018
document
Keyvani Janbahan, A. (author), Sadeghian Marnani, H. (author), Tamer, M.S. (author), Goosen, J.F.L. (author), van Keulen, A. (author)
Due to the harmonic motion of the cantilever in Tapping Mode Atomic Force Microscopy, it is seemingly impossible to estimate the tip-sample interactions from the motion of the cantilever. Not directly observing the interaction force, it is possible to damage the surface or the tip by applying an excessive mechanical load. The tip-sample...
journal article 2017
document
Keyvani Janbahan, A. (author), Alijani, F. (author), Sadeghian, Hamed (author), Maturova, Klara (author), Goosen, J.F.L. (author), van Keulen, A. (author)
This paper investigates the closed-loop dynamics of the Tapping Mode Atomic Force Microscopy using a new mathematical model based on the averaging method in Cartesian coordinates. Experimental and numerical observations show that the emergence of chaos in conventional tapping mode AFM strictly limits the imaging speed. We show that, if the...
journal article 2017
document
Sajadi, B. (author), Goosen, J.F.L. (author), van Keulen, A. (author)
journal article 2017
document
Wang, Q. (author), Goosen, J.F.L. (author), van Keulen, A. (author)
Flapping wings can pitch passively about their pitching axes due to their flexibility, inertia, and aerodynamic loads. A shift in the pitching axis location can dynamically alter the aerodynamic loads, which in turn changes the passive pitching motion and the flight efficiency. Therefore, it is of great interest to investigate the optimal...
journal article 2017
document
Sajadi, B. (author), Goosen, J.F.L. (author), van Keulen, A. (author)
Surface stress-based measurement is a relatively new mechanism in biological and chemical sensing. The viability of this mechanism depends on the maximum sensitivity, accuracy, and precision that can be achieved with these sensors. In this paper, an analytical approximate solution and a finite-element model are employed to describe the...
journal article 2017
document
Sajadi, B. (author), Alijani, F. (author), Goosen, J.F.L. (author), van Keulen, A. (author)
Characterization of nonlinear behavior of micro-mechanical components in MEMS applications plays an important role in their design process. In this paper, nonlinear dynamics, stability and pull-in mechanisms of an electrically actuated circular micro-plate subjected to a differential pressure are studied. For this purpose, a reduced-order...
journal article 2017
document
Wang, Q. (author), Goosen, J.F.L. (author), van Keulen, A. (author)
Spanwise twist can dominate the deformation of flapping wings and alters the aerodynamic performance and power efficiency of flapping wings by changing the local angle of attack. Traditional Fluid–Structure Interaction (FSI) models, based on Computational Structural Dynamics (CSD) and Computational Fluid Dynamics (CFD), have been used to...
journal article 2017
document
Sajadi, B. (author), Goosen, J.F.L. (author), van Keulen, A. (author)
The electrostatic instability (pull-in) of a flat electrode in a parallel plate capacitor has been shown to be highly sensitive to external mechanical loads such as pressure. In this paper, we substantiate the possibility of prompting additional unstable configurations in such a system, with a remarkable sensitivity to the applied pressure....
journal article 2017
document
Sajadi, B. (author), Alijani, F. (author), Davidovikj, D. (author), Goosen, J.F.L. (author), Steeneken, P.G. (author), van Keulen, A. (author)
In the last decade, graphene membranes have drawn tremendous attention due to their potential application in Nano-Electro-Mechanical Systems. In this paper, we show that the frequency response curves of graphene resonators are powerful tools for their dynamic characterization and for extracting their equivalent Young's modulus. For this purpose,...
journal article 2017
document
Tamer, M.S. (author), Sadeghian Marnani, H. (author), Keyvani Janbahan, A. (author), Goosen, J.F.L. (author), van Keulen, A. (author)
abstract 2016
document
Sajadi, B. (author), Goosen, J.F.L. (author), van Keulen, A. (author)
abstract 2016
document
Keyvani, A. (author), Sadeghian, H. (author), Goosen, J.F.L. (author), van Keulen, A. (author)
abstract 2016
document
Peters, H.J. (author), Goosen, J.F.L. (author), van Keulen, A. (author)
Lightweight vibrating structures (such as flapping wing micro air vehicle (FWMAV) designs) often require some form of control. To achieve controllability, local structural property changes (e.g., damping and stiffness changes) might be induced in an active manner. The stroke-averaged lift force production of a FWMAV wing can be modified by...
journal article 2016
document
Wang, Q. (author), Goosen, J.F.L. (author), van Keulen, A. (author)
Quasi-steady aerodynamic models play an important role in evaluating aerodynamic performance and conducting design and optimization of flapping wings. The kinematics of flapping wings is generally a resultant motion of wing translation (yaw) and rotation (pitch and roll). Most quasi-steady models are aimed at predicting the lift and thrust...
journal article 2016
document
Keyvani Janbahan, A. (author), Sadeghian Marnani, H. (author), Goosen, J.F.L. (author), van Keulen, A. (author)
The maximum amount of repulsive force applied to the surface plays a very important role in damage of tip or sample in Atomic Force Microscopy(AFM). So far, many investigations have focused on peak repulsive forces in tapping mode AFM in steady state conditions. However, it is known that AFM could be more damaging in transient conditions. In...
conference paper 2015
document
Wang, Q. (author), Goosen, J.F.L. (author), Van Keulen, F. (author)
As one of the most important components of a flapping-wing micro air vehicle (FWMAV), the design of an energy-efficient flapping-wing has been a research interest recently. Research on insect flight from different perspectives has been carried out, mainly with regard to wing morphology, flapping kinematics, and unsteady aerodynamics. However,...
conference paper 2014
Searched for: author:"Goosen, J.F.L."
(1 - 20 of 41)

Pages