Performance evaluation of a state and input observer for machine diagnostics

Document Type

Conference Proceeding

Publication Date

1-1-1990

Abstract

The performance of a state and input observer is evaluated on a DC spindle drive system designed and built for this purpose. The observer estimates the spindle drive load torque (a disturbance input) based on easy-to-access signals: armature voltage, current, and speed. The results show that the bandwidth and signal-to-noise ratio of the load torque estimate are as good as those obtained with an inline torque transducer for the conditions tested. The use of these observers for detecting machine tool malfunctions and abnormal process conditions related to load torque (such as tool breakage, tool wear, slide stick/slip, and bearing preload) is discussed. State and input observers appear to have good potential for machine diagnostics.

Identifier

0025537599 (Scopus)

Publication Title

Proceedings of the American Control Conference

External Full Text Location

https://doi.org/10.23919/acc.1990.4790915

ISSN

07431619

First Page

1109

Last Page

1112

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