Title

Finite Element Modelling And Vibration Control Of A Tetrahedral Space Frame Applied To Micromachining

Keywords

piezoelectric; positive position feedback; PPF; smart-structures; tetrahedral space frame

Abstract

This paper presents the modelling and vibration control of the tetrahedral space frame. The tetrahedral frame is a structure that is used in precision machining applications. When machining at a high precision requirement, structural vibration is of the utmost concern. This research develops finite element models using ANSYS and Matlab that can be used to implement a positive position feedback controller. In order to control and reduce the vibration magnitude, collocated piezoelectric actuators and sensors are placed at the optimal positions on the tetrahedral space frame. ANSYS is used to conduct a modal analysis on the structure to obtain the mode shapes, which determines the weakest positions and critical vibration modes under certain machining conditions. In Matlab, a finite element model is created which uses Timoshenko’s beam elements and it is further converted to state-space allowing the model to be controlled using programme simulations. A positive position feedback controller is chosen due to its non-sensitivity to spillover effects. © 2008 Inderscience Enterprises Ltd.

Publication Date

1-1-2008

Publication Title

International Journal of Nano and Biomaterials

Volume

1

Issue

4

Number of Pages

448-458

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1504/IJNBM.2008.022872

Socpus ID

77953518026 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/77953518026

This document is currently not available here.

Share

COinS