Algebraic Riccati Equation solution in Simulink via C+Fortran


Updated 20 Jul 2009

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This s-function solves Riccati equations in Simulink without calling the Matlab interpreter, it is FAST and usable with Real Time Workshop.

Specifically, the s-function is a level-2 gateway that calls several FORTRAN routines written by Arnold and Laub in the early eighties and publicly available under the cascade sublibrary of netlib. FORTRAN code is included in the Readme file, along with further instructions on how to compile and link the s-function.

Giampiero Campa, October 2002 and January 2009
Riccardo Bevilacqua & Jason Hall, NPS Spacecraft Robotics Lab, October 2008

Cite As

Giampiero Campa (2023). LqrSim (https://www.mathworks.com/matlabcentral/fileexchange/2651-lqrsim), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2008a
Compatible with any release
Platform Compatibility
Windows macOS Linux

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Version Published Release Notes

Fully converted to BSD License

Many thanks to Jason Hall and Riccardo Bevilacqua for your excellent job in enabling native matrices inputs to the block and
using the open source g77 FORTRAN compiler to create mex files and RTW binaries under both Windows and Linux.

This version works with MATLAB 7.6 (R2008a), uses native matrix signals, is re-mexable on every platform, and is better integrated with real time workshop (Thanks Jason & Riccardo).

Recompiled mex files with matlab 7.1 so that everything works fine with newer versions requiring the .mexw32 extension. The .dll files are retained to the benefit users working with versions prior to 7.1, other users may delete them.