Study on parameters self-tuning of speed servo system based on LS_SVM model Online publication date: Fri, 02-Jul-2010
by Pengzhan Chen, Xiaoqi Tang
International Journal of Modelling, Identification and Control (IJMIC), Vol. 10, No. 1/2, 2010
Abstract: Support vector machine (SVM) can approach any of the non-linear functions, so it can be used to reconstruct the dynamic features of the practical system. Driven by the demand of the parameters self-tuning of the speed servo system, a parameters self-tuning method based on least squares support vector machine (LS_SVM) reference model of the practical system had been put forward. In the parameters tuning process, at first, a variable amplitude triangular wave signal of variable frequency was used to stimulate the system and the input and output data sets under the open-loop state of the actual system were collected; then, by using LS_SVM in learning the data sets, a reference model with similar dynamic characteristics to the actual system was established; finally, a coordinate rotation optimisation algorithm was employed to find the optimum parameters of the practical system based on the achieved LS_SVM reference model, the parameters self-tuning process of speed servo system was completed indirectly. The proposed parameters self-tuning method in this paper was proved effective by simulation results.
Online publication date: Fri, 02-Jul-2010
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