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DC servomechanism parameter identification: A closed loop input error approach
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DOI：10.1016/j.isatra.2011.07.003.png)
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This paper presents a Closed Loop Input Error (CLIE) approach for on-line parametric estimation of a continuous-time model of a DC servomechanism functioning in closed loop. A standard Proportional Derivative (PD) position controller stabilizes the loop without requiring knowledge on the servomechanism parameters. The analysis of the identification algorithm takes into account the control law employed for closing the loop. The model contains four parameters that depend on the servo inertia, viscous, and Coulomb friction as well as on a constant disturbance. Lyapunov stability theory permits assessing boundedness of the signals associated to the identification algorithm. Experiments on a laboratory prototype allows evaluating the performance of the approach. (C) 2011 ISA. Published by Elsevier Ltd. All rights reserved.
Keyword:
Closed loop parameter identification
Servomotor
PD control
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