scholarly journals Joint Design of Two-Degree-Of-Freedom Controller and Closed Loop Identification Based on Prediction Error Method

1996 ◽  
Vol 32 (1) ◽  
pp. 55-61 ◽  
Author(s):  
Masafumi OKADA ◽  
Toshiharu SUGIE
Keyword(s):  
Prediction Error ◽  
Closed Loop ◽  
Degree Of Freedom ◽  
Joint Design ◽  
Closed Loop Identification ◽  
Two Degree Of Freedom ◽  
Error Method

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.

Two-degree-of-freedom control design for ball screw driving table using full-closed loop

2004 ◽  
Vol 2004.57 (0) ◽  
pp. 441-442
Author(s):  
Hiroshi HAMAMATSU ◽  
Kentaro Kondo ◽  
Shigeru FUTAMI ◽  
Teruo TSUJI ◽  
Akihiro YAMAMOTO ◽  
...  
Keyword(s):  
Closed Loop ◽  
Control Design ◽  
Degree Of Freedom ◽  
Ball Screw ◽  
Screw Driving ◽  
Two Degree Of Freedom

Two Degree-of-Freedom Hysteresis Compensation for a Dynamic Mirror With Antagonistic Piezoelectric Stack Actuation

2013 ◽  
Author(s):  
James A. Mynderse ◽  
George T. C. Chiu
Keyword(s):  
Input Signal ◽  
Control Strategy ◽  
Closed Loop ◽  
Loop System ◽  
Degree Of Freedom ◽  
Closed Loop System ◽  
Loop Control ◽  
Hysteresis Compensation ◽  
Hysteresis Control ◽  
Two Degree Of Freedom

A methodology for designing a low-computation, high-bandwidth strategy for closed-loop control of a hysteretic system without a priori knowledge of the desired trajectory is presented. The resulting two degree-of-freedom hysteresis control strategy is applied to a dynamic mirror with antagonistic piezoelectric stack actuation. Hysteresis compensator is performed by a finite state machine switching polynomials for hysteresis inversion based on the input signal slope. Residual error after hysteresis compensation is corrected by an LQR feedback controller. Experimental results demonstrate effectiveness of the hysteresis compensator and closed-loop system under the proposed hysteresis control strategy. For the triangular input signal tested, the closed-loop system achieves a 91.5% reduction in hysteresis uncertainty with 60 kHz sample rate.

scholarly journals Closed-loop identification of MIMO systems in the Prediction Error framework: Data informativity analysis

Automatica ◽  
2020 ◽  
Vol 121 ◽  
pp. 109171
Author(s):  
Kévin Colin ◽  
Xavier Bombois ◽  
Laurent Bako ◽  
Federico Morelli
Keyword(s):  
Prediction Error ◽  
Closed Loop ◽  
Mimo Systems ◽  
Closed Loop Identification
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