Attafi Rim ¹, Allous Manel ¹, Zanzouri Nadia ²

Affiliations
1 University of Tunis El Manar, Faculty of Sciences of Tunis, LR11ES20, Analysis Conception and Control of Systems Laboratory-ENIT, Box 37, Le Belvedere 1002, Tunis, TN
2 University of Tunis, Preparatory Engineering Institute of Tunis, 2 Rue Jawher Lel Nahrou Monfleury, 1089 Tunis, TN

Abstract

Objectives: In order to compensate the sensor fault effect, the diagnosis and the reconfigurable control laws are proposed. Methods/Statistical Analysis: We propose the use of the Bond Graph (BG) tool. The suggested law is based on reduced observer set for fault diagnosis, and weighting functions for blending the estimated states vector obtained from the different observers. To ensure the control closed loop strategy, and to eliminate in the steady state the tracking error, the reconfigurable feedback and feedforward controllers are presented using Lyapunov technique. Findings: The findings achieved are simulation tests, which applied on the stringing machine, provide better results. Application: The stringing machine elements modeling is a step indispensable before estimation, diagnosis, control and simulation tasks.

Keywords

Bond Graph (BG) Tool, Diagnosis, Reconfigurable Control, Reduced Observer Set

Full Text

   

Allous Manel ¹, Zanzouri Nadia ²

Affiliations
1 Laboratory (LACS) Analysis, Design and Control of Systems, National Engineering School of Tunis, Universite de Tunis El Manar, LR 11ES20LACS, Box 37, Le Belvedere 1002 Tunis, TN
2 Preparatory Engineering Institute of Tunis, Universite de Tunis, 2 RueJawaharlal Nehru Montfleury, 1089 Tunis, TN

Abstract

Objectives: A novel approach for diagnosis and control design that compensates sensor fault effects in electric power steering system (EPS) is proposed. Methods/Statistical Analysis: A Luenberger observer is used to estimate the fault of torque sensor for the EPS system. The fault tolerant control (FTC) based an inverse model of bond graph (BG) is used to compensate the fault of torsion bar sensor signal. The proposed control strategy presents an opportunity to improve EPS system performance and also reduce system complexity. Findings: The findings achieved are simulation tests, showed that the application of the synthesized law on the experimental of the EPS system show the effectiveness of the proposed approach. Application: The fault tolerant control based a bond graph model is an important step allows an improvement the rapidity of the compensation of fault in the system.

Full Text