SIMULAB an integrated environment for simulation and control

Command-driven matrix languages, such as MATLAB, have proved successful for linear control system design. The paper discusses the development and integration of SIMULAB, a graphically oriented nonlinear simulation package, into MATLAB. The 'open system' philosophy of MATLAB is carried over into SIMULAB where blocks and analysis tools can be added to the package. With access to MATLAB's powerful command language new algorithms for simulation, linearization and trimming have been developed. A system calling syntax, known as an S-function, is used to characterize SIMULAB systems. S-functions, which can be coded in a variety of ways, including block diagrams, C, FORTRAN, or M-files, provide a means for the incorporation of SIMULAB systems into the MATLAB command set. The complete design cycle involving modelling, simulation, and control design is addressed with respect to SIMULAB's simulation tools and MATLAB's toolboxes for system identification, control design, and optimization.<>