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In this paper, a fuzzy tracking control strategy for a quad-rotor unmanned aerial vehicle (UAV) with strongly coupling is put forward based on the Takagi-Sugeno(T — S) fuzzy error model. Firstly, The quad-rotor system is divided into altitude subsystem, position subsystem and attitude subsystem, selecting appropriate premise variables, the attitude, altitude and position T — S fuzzy error models are...
The phase field method is an effective method on solidification microstructure simulation. In this paper, the basic principles and the phase field model are introduced respectively. And then, the applications of phase-field simulation on solidification microstructure are summarized briefly. Finally, the problems to be faced and the future development trends are pointed out in this area.
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