The H-bridge inverter with sliding mode control based on improved idempotent approach law was taken as an example. Firstly, the discretized mathematical model of the system is established by using the stroboscopic mapping theory. Secondly, the nonlinear dynamic behavior of the system under different control parameters and was observed by stroboscopic diagram and spectrum diagram. Thirdly, the stability of the system was analyzed by using the fast-varying stability theorem, and the study conclusion is completely consistent with the stroboscopic diagram and spectrum chart analyses. Finally, the study showed that changes of external circuit parameters, such as, input voltage, load inductance and resistance have important effects on the stability of the system.
Key words
nonlinear /
H-bridge inverter /
sliding mode control /
improved idempotent approach law
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References
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