Peter Benner and Heike Fassbender

NICONET Report 1999-2: January 1999.

We describe a successful application of a SLICOT subroutine in a control engineering problem. Based on GPS data it is possible to automatically steer farm vehicles along a prescribed tracjectory. The bottleneck of the successful on-line implementation of a LQG regulator is the numerical solution of a discrete-time algebraic Riccati equation in real time and at high accuracy. This is achieved employing a Fortran-77 subroutine from the Subroutine Library in Control Theory SLICOT.