Title :
Comments on "Solutions to the combined sensitivity and complementary sensitivity problem in control systems
Author :
Zeren, Murat ; özbay, Hitay
Author_Institution :
Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA
fDate :
5/1/1998 12:00:00 AM
Abstract :
In the above-mentioned paper by Lim et al. (1996) a numerical example is given to show that the Nevanlinna-Pick interpolation formulas appearing in Khargonekar and Tannenbaum (1985) and Krein and Nudel´man (1977) are incorrect. By comparing the paper of Krein and Nudel´man with Adamjan (1971) we illustrate that the correct formulas are obtained by simply taking the transpose of the Pick matrix given in the first two above mentioned papers.
Keywords :
interpolation; matrix algebra; sensitivity; Nevanlinna-Pick interpolation formulas; Pick matrix; combined sensitivity; complementary sensitivity problem; Control systems; Error correction; Frequency domain analysis; Interpolation; Robust control; Robustness; Servomechanisms; Servomotors; Torque control; Velocity control;
Journal_Title :
Automatic Control, IEEE Transactions on
