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. Keywords: Bond Graph, Diagnosis, Fault Tolerant Control, Inverse Bond Graph
Highlights
In recent years, the electric power steering (EPS) system has been widely used as the automobile power-steering equipment because of its efficiency, modularity, and tenability
The results will be discussed to determine the performance of fault tolerant control (FTC) approach in presence of sensor fault in the EPS system
We propose an EPS fault tolerant controller system
Summary
The electric power steering (EPS) system has been widely used as the automobile power-steering equipment because of its efficiency, modularity, and tenability. EPS is a control system that electrically amplifies the driver steering torque inputs to the vehicle to improve steering comfort and performance[1]. Electric Power steering makes use of a torsion bar torque sensor to measure the torque of the driver. The EPS controller uses the torque sensor and the vehicle speed sig-. This paper focuses on the problem of compensation of fault when takes place in the torque sensor. A Luenberger observer is used to estimate the sensor fault and FTC approach is used to compensate this fault in the system. This paper is organized in 5 sections where Section 2 gives the introduction of EPS system and describes the modeling of EPS with Bond Graph.
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