A Numerically Efficient Augmented Subspace Identification Algorithm for Instrumental Variable Approaches

2005 ◽  
Author(s):  
Dapeng Luo ◽  
Alexander Leonessa
Keyword(s):  
Computational Efficiency ◽  
Instrumental Variable ◽  
Subspace Identification ◽  
Identification Algorithm ◽  
Identification Approach

In this paper, a rank decreasing problem inherent to the application of a classical instrumental variable subspace identification (SIVID) approach will be discussed and an augmented identification approach will be proposed to address it. Simulations will demonstrate the validity of the proposed algorithm and its improved computational efficiency.

Blind Identification of 2-Channel IIR Wave Propagation Systems for Central Cardiovascular Monitoring

2008 ◽  
Author(s):  
Jin-Oh Hahn ◽  
Andrew T. Reisner ◽  
H. Harry Asada
Keyword(s):  
Blood Pressure ◽  
Wave Propagation ◽  
Infinite Impulse Response ◽  
Identification Algorithm ◽  
Blind Identification ◽  
Pressure Measurements ◽  
Cardiovascular Monitoring ◽  
Channel Dynamics ◽  
Identification Approach ◽  
Propagation Dynamics

This paper presents a new approach to blind identification of a class of 2-channel infinite impulse response (IIR) systems describing the wave propagation dynamics. For these systems, this paper derives a blind identifiability condition and develops a blind identification algorithm, which is capable of uniquely determining both the numerator and denominator polynomials of the channel dynamics. The efficacy of the method is illustrated by a 2-sensor central cardiovascular monitoring application as an example, where the cardiovascular blood pressure wave propagation dynamics is identified and the aortic signals are reconstructed from blood pressure measurements at two distinct extremity locations. Experimental results using a swine subject illustrate how the new blind identification approach effectively identifies cardiovascular dynamics and reconstructs the aortic blood pressure and flow signals very accurately from two distinct peripheral blood pressure measurements under diverse physiologic conditions.

A subspace identification algorithm for descriptor systems

1992 ◽  
Vol 19 (1) ◽  
pp. 47-52 ◽  
Author(s):  
Marc Moonen ◽  
Bart De Moor ◽  
José Ramos ◽  
Shaohua Tan
Keyword(s):  
Descriptor Systems ◽  
Subspace Identification ◽  
Identification Algorithm
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