Numerical software in SLICOT for low order controller design

We describe the model and controller reduction software recently developed for the control and systems library SLICOT. Based on the latest algorithmic developments, a powerful collection of Fortran 77 subroutines has been implemented to cover the relative error and frequency-weighted model reduction, as well as special controller reduction approaches. The new model and controller reduction routines are among the most powerful and numerically most reliable software tools available for model and controller reduction. To facilitate their usage in user friendly environments, easy-to-use and flexible interfaces have been developed to integrate them in MATLAB and Scilab.