Multivariable Closed-Loop Identification and Its Application to Boiler-Turbine System of Power Unit
In this chapter, a new technique for multivariable closed-loop identification is presented. On the basis of process input and output data in the control loops, the process frequency-response matrix is estimated with signal decomposition and frequency spectrum analysis, and then a transform-function matrix is identified by least square method. The required input and output data are obtained while the processes are still in normal closed-loop operation. The closed-loop identification is applied to the boiler-turbine coordinated control system of power unit. Simulation example is given to show both effectiveness and accuracy of the identification method for boiler-turbine unit.
KeywordsClosed-loop identification Frequency response Multivariable system Boiler-turbine unit
We thank the financing support from the National Natural Science Foundation of China under Grant 61074087 and the Innovation Program of Shanghai Municipal Education Commission of China under Grant 12ZZ144.
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