NICONET: network for performant numerical software development in control engineering
Sabine Van Huffel and Ad J. W. van den Boom
Robust and performant numerical software for control systems analysis and design, such as the SLICOT and RASP libraries, is an essential ingredient in modern computer aided control systems design. To avoid duplicating the implementation efforts and ensure a wider dissemination, the originators of the SLICOT and RASP libraries have agreed to combine their libraries and make the joint library freely available. To extend the scope of cooperation, a thematic network for numerics in control NICONET is set up. This paper motivates the need for such a network and describes the objectives, benefits and main network activities.
Developments around the Freeware Standard Control Library SLICOT
Ad van den Boom and Sabine Van Huffel
Proc. CACSD'96 Symposium, Dearborn, MI, pp. 473-476, 1996.
Robust and performant numerical software for control systems analysis and design, such as the SLICOT and RASP libraries, is an essential ingredient in modern CACSD design. SLICOT, realised by WGS in cooperation with NAG, can primarily be viewed as a mathematical library for control theoretical computations. To avoid duplicating the implementation efforts of good quality software existing elsewhere, WGS and DLR, originator of the RASP control engineering library, have agreed to integrate these libraries into a joint standard control library. Making the product now freely available will ensure a wider and faster distribution of these computational tools and will make the much needed software more easily accessible to European industry in the short term. detailed plans have been developed for the instigation of a thematic network on numerics in control with the intention of extending the scope of cooperation to a European level.
LAPACK-Based Software for Subspace Identification
V. Sima, A. Varga, and M. Verhaegen
WGS Newsletter, No. 10, pp. 9-14, 1996.
This paper briefly describes the basic approaches and LAPACK-based Fortran routines for multivariable system identification by subspace techniques. The developed software package RASP-IDENT includes implementations of two classes of subspace model identification (SMI) techniques to identify a linear time-invariant system. The first class is referred to as the state intersection class of SMI techniques. The implemented method is known as the N4SID (Numerical algorithm for Subspace State Space System IDentification) approach. The second class is referred to as the Multivariable Output Error state SPace (MOESP) class of techniques. Implementations are provided to solve both deterministic and combined deterministic-stochastic identification problems.
Towards a Coordinated Development of Numerical CACSD Software: the RASP/SLICOT Compatibility Concept
G. Grübel, A. Varga, A. van den Boom and A. J. Geurts
Proc. CACSD'94 Symposium, Tucson, Arizona, pp. 499-504, 1994.
The concept of mutual compatibiliy is introduced. It has arisen from the cooperation of the developers of the RASP and SLICOT libraries. With this concept it becomes feasible to coordinate the development of several libraries leading to a reduction of software implementation and testing efforts without giving up the identity of the separate libraries. A first development along the lines of the mutual compatibility concept is the recently developed model reduction library RASP-MODRED.
