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Design of an improved tracking differentiator

  • Lian Zheng Ge
  • , Jian Chen
  • , Rui Feng Li*
  • *Corresponding author for this work
  • School of Mechatronics Engineering, Harbin Institute of Technology

Research output: Contribution to journalArticlepeer-review

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 languageEnglish
Pages (from-to)1439-1443
Number of pages5
JournalJilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition)
Volume41
Issue number5
StatePublished - Sep 2011
Externally publishedYes

Keywords

  • Robustness
  • Second-order sliding mode
  • Tracking differentiator

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