Compliant Remote-Center-of-Motion Mechanism Optimized for Energy-Dispersive Spectroscopy

Compliant Remote-Center-of-Motion Mechanism Optimized for Energy-Dispersive Spectroscopy

Janssen, Janeau (TU Delft Mechanical, Maritime and Materials Engineering; TU Delft Precision and Microsystems Engineering)

Herder, J.L. (graduation committee)
Tolou, N. (mentor)
Farhadi Machekposhti, D. (mentor)
Ghatkesar, M.K. (graduation committee)

Delft University of Technology

Mechanical Engineering | Mechatronic System Design (MSD)

2018-09-14

In-situ sample holders with double-tilting capabilities are used to insert and position samples inside a transmission electron microscope for dynamic imaging. However, the performance of these sample holders, regarding energy-dispersive X-ray spectroscopy (EDS) analysis, is not on par with their single-tilt counterparts. By analyzing the EDS influences and the tilting mechanism of double-tilt sample holders, the need for a remote-center-of-motion (RCM) mechanism as a tilting mechanism is identified. Because existing RCM mechanism design strategies limit the design flexibility, a novel design strategy is developed. The novel strategy gives more flexibility in terms of the use of space, design for stiffness and it gives variable input/output link rotation ratio functionality. A compliant proof-of-principle mechanism, which is designed using the novel RCM mechanism design strategy, is manufactured to characterize the accuracy, force/displacement behavior and the input/output link rotation ratio. Analytical, numerical and experimental results are compared, and it can be concluded that the compliant RCM mechanism has potential to be used in double-tilt sample holders.

Classification
Compliant Mechanisms
Design strategy
energy-dispersive X-ray spectroscopy
kinematics
remote-center-of-motion
sample holder

http://resolver.tudelft.nl/uuid:9c84e607-89c4-49ac-ae9d-4448fb2706e5

2019-12-31

Student theses

master thesis

© 2018 Janeau Janssen