Closed-Loop Identification of Input-Output LPV Models using Refined Instrumental Variable Methods

2011 ◽  
Author(s):  
Hossam S. Abbas
Keyword(s):  
Instrumental Variable ◽  
Closed Loop ◽  
Input Output ◽  
Closed Loop Identification

Two-Degree-of-Freedom Helicopter Closed-Loop Identification through a Cascade Controller

2011 ◽  
Vol 403-408 ◽  
pp. 4649-4658 ◽  
Author(s):  
Pouya Ghalei ◽  
Alireza Fatehi ◽  
Mohamadreza Arvan
Keyword(s):  
Closed Loop ◽  
Flight Simulation ◽  
Degree Of Freedom ◽  
Input Output ◽  
Closed Loop Identification ◽  
Practical Algorithm ◽  
Nonlinear Autoregressive Model ◽  
And Control ◽  
Nonlinear Autoregressive ◽  
Two Degree Of Freedom

Input-Output data modeling using multi layer perceptron networks (MLP) for a laboratory helicopter is presented in this paper. The behavior of the two degree-of-freedom platform exemplifies a high order unstable, nonlinear system with significant cross-coupling between pitch and yaw directional motions. This paper develops a practical algorithm for identifying nonlinear autoregressive model with exogenous inputs (NARX) and nonlinear output error model (NOE) through closed loop identification. In order to collect input-output identifier pairs, a cascade state feedback (CSF) controller is introduced to stabilize the helicopter and after that the procedure of system identification is proposed. The estimated models can be utilized for nonlinear flight simulation and control and fault detection studies.

scholarly journals Optimal instrumental variable method for closed-loop identification

2011 ◽  
Vol 5 (10) ◽  
pp. 1147-1154 ◽  
Author(s):  
M. Gilson ◽  
P.C. Young ◽  
H. Garnier ◽  
P.M.J. Van den Hof
Keyword(s):  
Instrumental Variable ◽  
Closed Loop ◽  
Variable Method ◽  
Closed Loop Identification ◽  
Instrumental Variable Method
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