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On the sliding mode control for DC servo mechanisms in the presence of unmodeled dynamics
- Source :
-
Mechatronics . Sep2003, Vol. 13 Issue 7, p755. 16p. - Publication Year :
- 2003
-
Abstract
- In this paper, via describing function techniques, sliding mode control of DC servo mechanisms is analyzed in the presence of unmodeled dynamics. We first show that, a conventional sliding mode controller with signum function will inevitably generate a limit cycle where a second or higher order unmodeled dynamics exists. A fractional interpolation based smoothing scheme is then proposed to eliminate the limit cycle, and maintain a reasonable tracking precision bound. In particular, a DC servo motor with unmodeled stator and sensor dynamics is taken into consideration. Both theoretical analysis and simulation results verify the effectiveness of the proposed new fractional interpolation control scheme. [Copyright &y& Elsevier]
- Subjects :
- *SLIDING mode control
*SERVOMECHANISMS
Subjects
Details
- Language :
- English
- ISSN :
- 09574158
- Volume :
- 13
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Mechatronics
- Publication Type :
- Academic Journal
- Accession number :
- 9906359
- Full Text :
- https://doi.org/10.1016/S0957-4158(02)00062-4