Identification of LPV Systems Using Successive Approximations

• Type: Article in International Conference Proceedings Book
• Date: 2008

Authors

P. Lopes dos Santos (Author) FEUP; José A. Ramos (Author) Other; J. L. Martins de Carvalho (Author) FEUP

Conference proceedings International

Title: 47TH IEEE CONFERENCE ON DECISION AND CONTROL, 2008 (CDC 2008)

Pages: 4509-4515

47th IEEE Conference on Decision and Control

Cancun, MEXICO, DEC 09-11, 2008

Indexing

ISI Web of Knowledge - 7 Citations

Scopus - 10 Citations

Scientific classification

FOS: Engineering and technology > Other engineering and technologies

Other information

Authenticus ID: P-004-5GZ

DOI: 10.1109/cdc.2008.4738786

Abstract (EN): In this paper a successive approximation approach for MIMO linear parameter varying (LPV) systems with affine parameter dependence is proposed. This new approach is based on an algorithm previously introduced by the authors, which elaborates on a convergent sequence of linear deterministic-stochastic state-space approximations. In the previous algorithm the bilinear term between the time varying parameter vector and the state vector is allowed to behave as a white noise process when the scheduling parameter is a white noise sequence. However, this is a strong limitation in practice since, most often than not, the scheduling parameter is imposed by the process itself and it is typically a non white noise signal. In this paper, the bilinear term is analysed for non white noise scheduling sequences. It is concluded that its behaviour depends on the input sequence itself and it ranges from acting as an independent colored noise source, mostly removed by the identification algorithm, down to a highly input correlated signal that may be incorrectly assumed as being part of the system subspace. Based on the premise that the algorithm performance can be improved by the noise energy reduction, the bilinear term is expressed as a function of past inputs, scheduling parameters, outputs, and states, and the linear terms are included in a new extended input.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7