Abstract
To improve the robustness of tracking differentiator, the nonlinear sliding mode tracking differentiator is analyzed in details in this paper. Then an improved second-order sliding mode tracking differentiator is presented using Lyapunov stability theory. Integrating the characteristics of linear and nonlinear tracking differentiators, the proposed tracking differentiator can track and differentiate any signal; meanwhile, its structure is simple and it is easy for application. Numerical simulations are carried out on this improved tracking differentiator and on a super-twisting tracking differentiator. Results show that the improved tracking differentiator can reduce the chartering of differential signal.
| Original language | English |
|---|---|
| Pages (from-to) | 1439-1443 |
| Number of pages | 5 |
| Journal | Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) |
| Volume | 41 |
| Issue number | 5 |
| State | Published - Sep 2011 |
| Externally published | Yes |
Keywords
- Robustness
- Second-order sliding mode
- Tracking differentiator
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