15th Triennial World Congress of the International Federation of Automatic Control
  Barcelona, 21–26 July 2002 
STABILITY PRESERVING TRANSITION FROM DERIVATIVE FEEDBACK TO ITS DIFFERENCE COUNTERPARTS
H. Kokame1 T. Mori2
1) Dept. of Electrical & Electronic Systems, Osaka Prefecture University
kokame@ecs.ees.osakafu-u.ac.jp
2) Dept. of Electronics & Information Science, Kyoto Institute of Technology
mori@dj.kit.ac.jp
The present paper disusses the preservation of the closed-loop stability when a derivative feedback is replaced by its difference counterparts. A sufficient condition for such stability preservation is provided. Applying this condition leads to a favorable result that the stability preservation is always true for single-input systems. It is pointed out however that multi-output systems do not allow such simplicity.
Keywords: difference feedback, delay differential equation, derivative feedback, stabilization
E-mail: kokame@ecs.ees.osakafu-u.ac.jp
Session slot T-Fr-A18: Time delay systems/Area code 2b : Linear Systems