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Verhaegen, Michel
Publikationer (2 of 2) Visa alla publikationer
Hansson, A. & Verhaegen, M. (2014). Distributed system identification with ADMM. In: Proceedings of the 53rd IEEE Conference on Decision and Control: . Paper presented at 53rd IEEE Conference on Decision and Control 15-17 Dec. 2014, Los Angeles, CA (pp. 290-295). Los Angeles
Öppna denna publikation i ny flik eller fönster >>Distributed system identification with ADMM
2014 (Engelska)Ingår i: Proceedings of the 53rd IEEE Conference on Decision and Control, Los Angeles, 2014, s. 290-295Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

This paper presents identification of both network connected systems as well as distributed systems governed by PDEs in the framework of distributed optimization via the Alternating Direction Method of Multipliers. This approach opens first the possibility to identify distributed models in a global manner using all available data sequences and second the possibility for a distributed implementation. The latter will make the application to large scale complex systems possible. In addition to outlining a new large scale identification method, illustrations are shown for identifying both network connected systems and discretized PDEs.

Ort, förlag, år, upplaga, sidor
Los Angeles: , 2014
Serie
53rd IEEE Conference on Decision and Control, ISSN 0191-2216
Nationell ämneskategori
Datavetenskap (datalogi)
Identifikatorer
urn:nbn:se:liu:diva-129292 (URN)10.1109/CDC.2014.7039396 (DOI)978-1-4799-7745-1 (ISBN)978-1-4673-6088-3 (ISBN)
Konferens
53rd IEEE Conference on Decision and Control 15-17 Dec. 2014, Los Angeles, CA
Tillgänglig från: 2016-06-15 Skapad: 2016-06-15 Senast uppdaterad: 2018-01-10
Verhaegen, M. & Hansson, A. (2014). Nuclear norm subspace identification (N2SID) for short data batches. In: Proceedings of IFAC 2014 World Congress: . Paper presented at Preprints of the 19th World Congress The International Federation of Automatic Control. Cape Town, South Africa. August 24-29, 2014 (pp. 9528-9533). Cape Town
Öppna denna publikation i ny flik eller fönster >>Nuclear norm subspace identification (N2SID) for short data batches
2014 (Engelska)Ingår i: Proceedings of IFAC 2014 World Congress, Cape Town, 2014, s. 9528-9533Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Subspace identification is revisited in the scope of nuclear norm minimization methods. It is shown that essential structural knowledge about the unknown data matrices in the data equation that relates Hankel matrices constructed from input and output data can be used in the first step of the numerical solution presented. The structural knowledge comprises the low rank property of a matrix that is the product of the extended observability matrix and the state sequence and the Toeplitz structure of the matrix of Markov parameters (of the system in innovation form). The new subspace identification method is referred to as the N2SID (twice the N of Nuclear Norm and SID for Subspace IDentification) method. In addition to include key structural knowledge in the solution it integrates the subspace calculation with minimization of a classical prediction error cost function. The nuclear norm relaxation enables us to perform such integration while preserving convexity. The advantages of N2SID are demonstrated in a numerical open- and closed-loop simulation study. Here a comparison is made with another widely used SID method, i.e. N4SID. The comparison focusses on the identification with short data batches, i.e. where the number of measurements is a small multiple of the system order.

Ort, förlag, år, upplaga, sidor
Cape Town: , 2014
Nyckelord
Subspace system identification, Nuclear norm optimization, Rank constraint, Short
Nationell ämneskategori
Reglerteknik
Identifikatorer
urn:nbn:se:liu:diva-129293 (URN)10.3182/20140824-6-ZA-1003.00386 (DOI)
Konferens
Preprints of the 19th World Congress The International Federation of Automatic Control. Cape Town, South Africa. August 24-29, 2014
Tillgänglig från: 2016-06-15 Skapad: 2016-06-15 Senast uppdaterad: 2016-06-29
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