Robust control of observer-based sampled-data systems: digital redesign approach

Robust control of observer-based sampled-data systems: digital redesign approach

For access to this article, please select a purchase option:

Buy article PDF
(plus tax if applicable)
Buy Knowledge Pack
10 articles for $120.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
IET Control Theory & Applications — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

This study proposes the digital redesign (DR) method for an observer-based output-feedback control in the presence of parametric uncertainties. The term DR is to convert an existing analogue control into an equivalent digital one in the sense of state-matching. The DR problem can be reduced to find the digital gains minimising the norm distance between the closed-loop states of the analogue and digital control. The main feature of the proposed DR is that the state estimation error in the plant dynamics is considered for the state-matching condition. Also, by handling the parametric uncertainties in the concerned system, the robust stability is well guaranteed in the proposed DR procedure. Its constructive conditions are expressed as the linear matrix inequalities A numerical example has been demonstrated to visualise the feasibility of the proposed methodology.


    1. 1)
    2. 2)
      • Shieh, L.S., Gu, J., Sunkel, J.W.: `Model conversions of uncertain linear systems using the bilinear and inverse-bilinear approximation method', Proc. 36th Midwest Symposium, 1993, 1, p. 514–517.
    3. 3)
    4. 4)
    5. 5)
    6. 6)
    7. 7)
    8. 8)
      • F. Hao , T. Chu , L. Huang , L. Wang . Non-fragile controllers of peak gain minimization for uncertain systems via LMI approach. Dyn. Cont. Discret. Impulsive Syst. , 681 - 693
    9. 9)
    10. 10)
    11. 11)
    12. 12)
    13. 13)
      • B.C. Kuo . (1992) Digital control system.
    14. 14)
    15. 15)
      • S.M. Guo , W. Wang , L.S. Shieh . Discretization of two degree of freedom controller and system with state input and output delays. Proc. IEE Control Theory Appl. , 87 - 96
    16. 16)
      • T. Chen , B. Francis . (1995) Optimal sampled-data control systems.
    17. 17)
    18. 18)

Related content

This is a required field
Please enter a valid email address