Squid (Stable quasiconvex identification) is a open-source matlab tool for the generation of reduced order linear system models from available transfer function data points. The tool is based on a quasi-convex relaxation of a system identification problem subject to stability and passivity constraints.


Download Quid (readme files, examples and demos are included in the distribution):


Relevant Publications:

  1. K. C. Sou, A. Megretski, L. Daniel, "A Quasi-Convex Optimization Approach to Parameterized Model Order Reduction", IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, Vol 27, No 3, March 2008.
  2. Kin Cheong Sou, “Convex Optimization Methods for Model Order Reduction”, PhD Thesis, Massachusetts Institute of Technology, September 2008.


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For questions or comments please write to Kin Cheong Sou (kcsou@control.lth.se) or to Luca Daniel (luca@mit.edu)


Last Updated 9 October, 2009.