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This paper describes an experimental identification of nonlinear process of natural gas cooling. Identification is carried out by using Matlab and simplex optimization method. Cooler's linear model is determined experimentally by recording system transients for several operating points. Recording is executed for change of the reference value of cooler's output gas temperature, with different temperatures...
The most commonly used methods for design of the industrial speed controllers are: experimental, root locus, frequency and optimization methods. The most commonly used experimental methods are Ziegler-Nichols methods: stability margin and step response function. Ziegler-Nichols methods are applied for design of speed controller of PM brushless DC motor drive. Both methods give the controller parameters,...
This paper covers an application of MRAC with modified signal adaptation algorithm with optimal error weighting coefficients in a permanent magnet brushless DC motor drive with significant parameter changes in moment of inertia, armature resistance and flux linkage coefficient. Optimal values of the error weighting coefficients are determined for third order reference model, using Matlab and simplex...
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