Journal of Computers, Vol 6, No 4 (2011), 705-710, Apr 2011
doi:10.4304/jcp.6.4.705-710

H2/H∞ Robust Controller of the Arc Welding Inverter Power

Jun-rong Yan, Hai-kuan Liu, Ping Liao, Liang-zhi Gan, Li-jun Liu

Abstract


There are a lot of interference sources in the system of the arc welding inverter power. In this paper, a small-signal model which was built by the method of state-space average was quoted. A control system which comprised an interference of load resistance and an interference of power supply fluctuation was built. A H2/H∞state -feedback controller was designed in the method of LMI. The simulation indicated the result, which the interference of power was measured by H2 norm so that the output of the system was influenced weakly, and the interference of arc load was measured by H∞ norm so that the system was robust.


Keywords


Arc welding inverter power; H2/H∞controller; LMI

References


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