中国物理B ›› 2015, Vol. 24 ›› Issue (9): 90202-090202.doi: 10.1088/1674-1056/24/9/090202

• GENERAL • 上一篇    下一篇

Robust H control of uncertain systems with two additive time-varying delays

M. Syed Ali, R. Saravanakumar   

  1. Department of Mathematics, Thiruvalluvar University, Vellore 632115, Tamil Nadu, India
  • 收稿日期:2015-03-23 修回日期:2015-04-17 出版日期:2015-09-05 发布日期:2015-09-05
  • 基金资助:
    Project supported by the Fund from the Department of Science and Technology of India (Grant No. SR/FTP/MS-039/2011).

Robust H control of uncertain systems with two additive time-varying delays

M. Syed Ali, R. Saravanakumar   

  1. Department of Mathematics, Thiruvalluvar University, Vellore 632115, Tamil Nadu, India
  • Received:2015-03-23 Revised:2015-04-17 Online:2015-09-05 Published:2015-09-05
  • Contact: M. Syed Ali E-mail:syedgru@gmail.com
  • Supported by:
    Project supported by the Fund from the Department of Science and Technology of India (Grant No. SR/FTP/MS-039/2011).

摘要: This paper is concerned with the problem of delay-dependent robust H control for a class of uncertain systems with two additive time-varying delays. A new suitable Lyapunov-Krasovskii functional (LKF) with triple integral terms is constructed and a tighter upper bound of the derivative of the LKF is derived. By applying a convex optimization technique, new delay-dependent robust H stability criteria are derived in terms of linear matrix inequalities (LMI). Based on the stability criteria, a state feedback controller is designed such that the closed-loop system is asymptotically stable. Finally, numerical examples are given to illustrate the effectiveness of the proposed method. Comparison results show that our results are less conservative than the existing methods.

关键词: additive time-varying delays, Lyapunov method, H control, linear matrix inequality

Abstract: This paper is concerned with the problem of delay-dependent robust H control for a class of uncertain systems with two additive time-varying delays. A new suitable Lyapunov-Krasovskii functional (LKF) with triple integral terms is constructed and a tighter upper bound of the derivative of the LKF is derived. By applying a convex optimization technique, new delay-dependent robust H stability criteria are derived in terms of linear matrix inequalities (LMI). Based on the stability criteria, a state feedback controller is designed such that the closed-loop system is asymptotically stable. Finally, numerical examples are given to illustrate the effectiveness of the proposed method. Comparison results show that our results are less conservative than the existing methods.

Key words: additive time-varying delays, Lyapunov method, H control, linear matrix inequality

中图分类号:  (Ordinary differential equations)

  • 02.30.Hq
02.30.Ks (Delay and functional equations) 02.30.Yy (Control theory) 05.45.-a (Nonlinear dynamics and chaos)