A. van den Boom, A. Brown, F. Dumortier, A. Geurts, S. Hammarling, R. Kool, M. Vanbegin, P. Van Dooren, S. Van Huffel, SLICOT, a subroutine library for control and system theory, IFAC Symp. on CADCS, Swansea UK, July 1991.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....normalized RCF, or for evaluation of L1 norm are presently under development. The implementation of the library has been done in accordance with the newly established RASP SLICOT mutual compatibility concept [23] Thus the implemented routines belong simultaneously to both RASP [24] and SLICOT [25] libraries. This software sharing strategy is meant to save future efforts in developing both libraries. 7. CONCLUSIONS We presented an up to date overview of numerically reliable algorithms and associated software tools for model reduction. The algorithmic richness and the complexity of the ....

A. van den Boom et al. SLICOT, a subroutine library in control and systems theory. Prepr. 5th IFAC/IMACS Symp. CADCS'91, Swansea, UK, pp. 89--94. Pergamon Press, 1991.

.... control systems analysis and design The research and development of reliable tools for computer aided control system analysis and design (CACSD) is heavily dependent on the availability of high quality basic software [1, 2, 3] Such a software is well represented by the SLICOT Fortran 77 library [4, 5], a product of WGS, commercialized till now by the Numerical Algorithms Group (NAG) Oxford, UK. Recently, WGS and NAG agreed to make SLICOT freely available, by replacing the NAG mathematical library based computations by equivalent calculations performed by BLAS [7] and LAPACK [8] routines, ....

A. van den Boom, A. Brown, A. Geurts, S. Hammarling, R. Kool, M. Vanbegin, P. Van Dooren, and S. Van Huffel, SLICOT, a subroutine library in control and systems theory, In Preprints 5th IFAC/IMACS Symp. CADCS'91, Swansea, UK, Pergamon Press, Oxford, 1991, pp. 89--94.

....or C modules from inside a laboratory session. The benefits are substantial: first, one has access to an enormous resource of existing Fortran scientific libraries. A recent example is the interfacing of PC MATLAB with the SLICOT Fortran library (produced by NAG) for automatic control [161] [190]. Second, it is possible to use mature compiler technology for code optimization of these modules in order to obtain high performance on the underlying computing platform [78] Two way interconnection is a recent enhancement which allows MATLAB to be used as a computational engine from a C ....

A. van den Boom, A. Brown, F. Dumortier, A. Geurts, S. Hammarling, R. Kool, M. Vanbegin, P. Van Dooren, and S. Van Huffel. SLICOT, a subroutine library for control and system theory. In Preprints IFAC Symp. on CADCS, pages 89--94, Swansea, UK, July 1991.

....of them have become challenging from a numerical point of view as well. The interdisciplinary field of numerical linear algebra and linear system theory has lead to some significant developments in the last decade and several of these results are nowadays being implemented in software for CACSD [36], 40] However, numerical methods in this area are still far from complete. Above we indicated some of these : 12 ffl Most of the techniques available today are specifically aimed at dense systems. Only few methods are available that deal with sparse matrices. These are typically based on ....

....for these specialized problems. The above list is by far not exhaustive. Other recent developments include e.g. ffl Control algorithms developed for special architectures [5] 13] 6] exploiting parallelism. ffl Software developments such as interactive packages [40] and software libraries [36] ffl Combinations of the above issues, such as in the problem of model reduction of large sparse systems. This clearly involves sparse matrix techniques but all three other issues come up as well as e.g. indicated in [35] 13 Acknowledgement Part of this research was performed while visiting ....

A. van den Boom, A. Brown, F. Dumortier, A. Geurts, S. Hammarling, R. Kool, M. Vanbegin, P. Van Dooren, S. Van Huffel, SLICOT, a subroutine library for control and system theory, IFAC Symp. on CADCS, Swansea UK, July 1991.

....of them have become challenging from a numerical point of view as well. The interdisciplinary field of numerical linear algebra and linear system theory has lead to some significant developments in the last decade and several of these results are nowadays being implemented in software for CACSD [34], 38] However, numerical methods in this area are still far from complete. Above we indicated some of these : ffl Most of the techniques available today are specifically aimed at dense systems. Only few methods are available that deal with sparse matrices. These are typically based on Krylov ....

....for these specialized problems. The above list is by far not exhaustive. Other recent developments include e.g. ffl Control algorithms developed for special architectures [5] 12] 6] exploiting parallelism. ffl Software developments such as interactive packages [38] and software libraries [34] ffl Combinations of the above issues, such as in the problem of model reduction of large sparse systems. This clearly involves sparse matrix techniques but all three other issues come up as well as e.g. indicated in [33] Acknowledgement Part of this research was performed while visiting the ....

A. van den Boom, A. Brown, F. Dumortier, A. Geurts, S. Hammarling, R. Kool, M. Vanbegin, P. Van Dooren, S. Van Huffel, SLICOT, a subroutine library for control and system theory, IFAC Symp. on CADCS, Swansea UK, July 1991.

....many universities and research sites, especially in Germany. RASP, together with the engineering database and operating system RSYST [6] form the software infrastructure of the modern computer aided control engineering environment ANDECS [7] RASP and ANDECS are products of DLR, Germany. SLICOT [3], a general purpose basic control library realised by WGS in cooperation with NAG, can primarily be viewed as a mathematical library for control theoretical computations. The main emphasis in SLICOT is on numerical reliability of implemented algorithms and the numerical robustness and efficiency ....

A. van den Boom, A. Brown, A. Geurts, S. Hammarling, R. Kool, M. Vanbegin, P. Van Dooren and S. Van Huffel, (1991). SLICOT, a subroutine library in control and systems theory, In Preprints 5th IFAC/IMACS Symp. CADCS'91, Swansea, UK, Pergamon Press, Oxford, pp. 89-94.

....robustness and efficiency of routines. Special emphasis is put on providing maximal algorithmic flexibility to users, and on the use of rigorous implementation and documentation standards (see [57, 59] The previous and present releases of SLICOT contain about 90 user callable routines (see [39, 36] and Table 15 in Appendix A) related to analysis, modeling, transformation and synthesis of systems. Future extensions will cover routines for descriptor systems, model reduction and subspace identification. RASP covers a broad area of control engineering computations supporting frequency and ....

A. J. W. van den Boom, A. Brown, F. Dumortier, A. Geurts, S. Hammarling, R. Kool, M. Vanbegin, P. Van Dooren, and S. Van Huffel. SLICOT, a subroutine library in control and systems theory. In Proc. of the 5th IFAC Symposium on Computer Aided Design in Control Systems, Swansea, UK, pages 89--94, Oxford, UK, July 1991. Pergamon Press.

....theory has lead to some significant developments in the last decade and several of these results are nowadays being implemented in software for CACSD. However, numerical methods in this area are still far from complete. Most of the techniques available today are specifically aimed at dense systems [31], 20] 33] 30] The methods developed for special architectures are often only described algorithmically [7] 8] or do not exploit any particular structure or sparsity of the matrices [12] 19] There are indeed only few methods for large scale control problems that make specific use of the ....

A. van den Boom, A. Brown, F. Dumortier, A. Geurts, S. Hammarling, R. Kool, M. Vanbegin, P. Van Dooren, S. Van Huffel, SLICOT, a subroutine library for control and system theory, IFAC Symp. on CADCS, Swansea UK, July 1991.

....numerical software is a challenging and time consuming task which involves cooperative efforts over a lasting period of time. Portable numerical software written in Fortran for computer aided control systems design (CACSD) is provided by several subroutine libraries as for example RASP [5] SLICOT [2], BIMAS [18] and BIMASC [16] and LISPACK [8] These libraries share many common features as for instance rigorous implementation along well established programming and documentation standards, numerical robustness of software implementations, similarities in the covered topics, and use of high ....

....The graphics in RASP is supported by the GKS and PHIGS libraries. The latest version RASP 92 consists of about 320 user callable routines (not counting those from the above mentioned standard libraries) SLICOT can be primarily viewed as a mathematical library for control theoretical computations [2]. The library provides tools to perform many basic 1 ANDECS r is a registered trademark of DLR system analysis and synthesis tasks. A special emphasis in SLICOT is on providing maximum algorithmic flexibility to users, and on the use of rigorous implementation and documentation standards ....

A. van den Boom, A. Brown, A. Geurts, S. Hammarling, R. Kool, M. Vanbegin, P. Van Dooren, and S. Van Huffel. SLICOT, a subroutine library in control and systems theory. In Prepr. 5th IFAC/IMACS Symp. CADCS'91, Swansea, UK, pp. 89--94. Pergamon Press, Oxford, 1991.

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