Globoidal cam indexing servo drive control by IVSMFC with load torque estimator

This paper introduces an integral variable-structure model-following control (IVSMFC) incorporated with a load torque estimator based on variable-structure technique for a globoidal cam indexing system. IVSMFC features excellent robustness and performance properties under certain disturbances and pa...

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Bibliographic Details
Published inIEEE transactions on industry applications Vol. 38; no. 5; pp. 1326 - 1333
Main Authors Chang, Geeng-Kwei, Chern, Tzuen-Lih, Tsay, Der-Min
Format Journal Article
LanguageEnglish
Published New York IEEE 01.09.2002
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Automotive electronics
CADCAM
Computer aided manufacturing
Degradation
Driving
Estimators
Indexing
Indexing systems
Loads (forces)
Motors
Power system stability
Robustness
Servomechanisms
Servosystems
Torque
Torque control
Vibrations
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Summary:This paper introduces an integral variable-structure model-following control (IVSMFC) incorporated with a load torque estimator based on variable-structure technique for a globoidal cam indexing system. IVSMFC features excellent robustness and performance properties under certain disturbances and parameter variations. However, heavy time-varying load may influence expected performance. In a cam system, when it is in motion, the load produced by inertia forces deflects the driving motor speed and, as a result, degrades the indexing precision. To fulfill the constant driving speed assumption, a load torque estimator is employed and fed forward to compensate the load torque variations. A digital-signal-processor-based globoidal cam indexing servo drive is presented and the experimental results show the effectiveness of the proposed scheme.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0093-9994
1939-9367
DOI:10.1109/TIA.2002.802895