Design and analysis of indentation tester with nanometer accuracy

Author

Zhongkang, Song ; Dejun, Ma ; Wei, Chen ; Junhong, Guo

Author_Institution

Dept. of Mech. Eng., Acad. of Armored Forces Eng., Beijing, China

fYear

2011

fDate

15-17 April 2011

Firstpage

3106

Lastpage

3109

Abstract

Based on the instrumented indentation technique, an indentation tester with nanometer accuracy, which integrate the functions of driving, measuring, controlling and data-analyzing together, is presented in this paper. The test´s intermediate error is decreased by loading with voice coil actuator without transmission mechanism And the signal is acquired from high-precision capacitive displacement sensor and strain gauge load cell. An closed loop control system based on PID algorithm is developed and control software is programmed. By analyzing the displacement influence factors, calibrating the instrument compliance and confirming the initial contact point, the accuracy of the testing result is guaranteed sufficiently.

Keywords

actuators; capacitive sensors; closed loop systems; indentation; strain gauges; three-term control; PID algorithm; closed loop control system; high-precision capacitive displacement sensor; indentation tester; instrumented indentation technique; nanometer accuracy; strain gauge load cell; voice coil actuator; Accuracy; Actuators; Coils; Instruments; Materials; Mechanical engineering; compliance; contact point; control system; instrumented indentation; voice coil actuator;

fLanguage

English

Publisher

ieee

Conference_Titel

Electric Information and Control Engineering (ICEICE), 2011 International Conference on

Conference_Location

Wuhan

Print_ISBN

978-1-4244-8036-4

Type

conf

DOI

10.1109/ICEICE.2011.5778012

Filename

5778012