Identification of Nonlinear Characteristics for Precision Servomechanisms
نویسندگان
چکیده
A system identification method in the frequency-domain is proposed for a servomechanism with nonlinearities. A linear part of the servomechanism is identified exactly without distortion due to inherent nonlinearities through the proposed method. Parameters of the nonlinearities, including both Coulomb and viscous friction, are identified by the use of limit cycle analysis and describing function approximation. A model-based feedforward controller is applied to verify the availability of the proposed identification method.
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