Geodesic
An instrumental variable method for robot identification based on time variable parameter estimation
Kybernetika, Tome 54 (2018) no. 1, pp. 202-220

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This paper considers the data-based identification of industrial robots using an instrumental variable method that uses off-line estimation of the joint velocities and acceleration signals based only on the measurement of the joint positions. The usual approach to this problem relies on a ‘tailor-made’ prefiltering procedure for estimating the derivatives that depends on good prior knowledge of the system's bandwidth. The paper describes an alternative Integrated Random Walk SMoothing (IRWSM) method that is more robust to deficiencies in such a priori knowledge and exploits an optimal recursive algorithm based on a simple integrated random walk model and a Kalman filter with associated fixed interval smoothing. The resultant IDIM-IV instrumental variable method, using this approach to signal generation, is evaluated by its application to an industrial robot arm and comparison with previously proposed methods.
DOI : 10.14736/kyb-2018-1-0202
Classification : 70E60, 93B30
Keywords: industrial robot system; system identification; instrumental variable method; parameter estimation; Kalman filter; fixed interval smoothing 
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Brunot, Mathieu; Janot, Alexandre; Young, Peter; Carrillo, Francisco. An instrumental variable method for robot identification based on time variable parameter estimation. Kybernetika, Tome 54 (2018) no. 1, pp. 202-220. doi: 10.14736/kyb-2018-1-0202

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