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This research mainly aims at the simplified model of complex CSTR chemical process, which presents a NARMAX modeling approach based on a large number of input and output data. According to the model residuals, a series of correlation analysis is used to verify the validity of the model. By using the NARMAX model, a nonlinear pole placement controller is designed in terms to the U-model. In the simulation,...
An adaptive structure radial basis function (RBF) network model is proposed in this paper to model nonlinear processes with operating point migration. The recursive orthogonal least squares algorithm (ROLS) is adopted to select new centers on-line, as well as to train the network weights. Based on the R matrix in the orthogonal decomposition, an initial center bank is formed and updated in each sample...
The unsteady hydrodynamic characteristics of vertical axis tidal turbine are investigated by numerical simulation based on viscous CFD method. The starting mechanism of the turbine is revealed through analyzing the interaction of its motion and dynamics during starting process. The operating hydrodynamic characteristics of the turbine in wave-current condition are also explored by combining with the...
This article mainly focuses on two treatment methods in FIR model identification for the abnormality in measured data set. One is called linear interpolation method(LIM), whose essence is to rebuild the data set according to linear interpolation after indicating the abnormal data. The other is the method of identification based on segments of data(ISDM). The idea is to remove the abnormal data and...
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