Abstract
An adaptive fuzzy observer for nonlinear magnetic levitation system with uncertain friction coefficient is proposed. First, a T-S fuzzy model of the nonlinear magnetic levitation system is proposed. An observer is given by LMI method and the Lyapunov method. Through adding an auxiliary variable, it relaxes the constraint of the design of observer. The proposed approach is a more relaxed condition than others. Simulation results show the effectiveness of this approach. The results show that the position of magnetic levitation system is estimated effectively with unknown friction coefficient. There is some reference value for a kind of nonlinear systems with unknown parameter.
| Original language | English |
|---|---|
| Pages (from-to) | 114-118 |
| Number of pages | 5 |
| Journal | Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) |
| Volume | 42 |
| Issue number | SUPPL. 1 |
| Publication status | Published - Sept 2011 |
Keywords
- Magnetic levitation system
- Observer
- T-S fuzzy system
- Uncertain friction coefficient