As we all know that nonlinear systems exist in the world extensively, so it is important to investigate the stability and control of nonlinear systems. As for nonlinear systems, it is difficult to get the accurate mathematic model. Even we can build mathematic model for those systems, it may be too complicated to design a
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With the development of electric power system, the complexity of network structures and operation conditions have been increasing, which has brought new challenge to the security and stability of power systems. To design a robust and adaptive controller with the application of nonlinear control theory is very important to the stability of power system.In this
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With the rapid development of industrial economy and the power electronics in our contry, lots of nonlinear loads, such as power supplies and rectifier equipments, are widely used in the power system. Those nonlinear loads bring convenience to power transformation, but at the same time, they draw nonsinusoidal currents from ac mains and cause reactive
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Compared with classical control systems, fuzzy control systems have the following two unmatched advantages. First, it can be easy to realize effectively human control strategies and experience in many applications. Second, it can achieve better control performance in the absence of the mathematic model for the controlled system. In the control area, fuzzy systems are
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