The Design and Benefits of Electric Power Steering

Badawy, Aly; Bolourchi, Farhad; Gaut, Steve K.

doi:10.4271/973041

Cited by 12 publications

(3 citation statements)

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“…The past few years have witnessed a great increase in the number and sophistication of EPS system, as it is more fuel efficient and enviromental friendly compared with the traditional hydraulic power steering (HPS) system [1]. Nowadays, the EPS has been a standard feature for most small and medium size cars.…”

Section: Introductionmentioning

confidence: 99%

Reliability improvement of electric power steering system based on ISO 26262

Tian

2013

2013 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE)

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Electric power steering (EPS) systems have been more and more widely used in medium and large cars. As a safetycritical system, its safety and reliability are uttermost important. ISO 26262 adapted from IEC 61508 provides a V-model as a reference process model for different phases of product development. In this paper, DFMEA (design failure mode and effects analysis) and FTA (fault tree analysis) complied with ISO 26262 are taken to analyze the safety aspects of EPS so as to enhance the safety and reliability of EPS. Firstly, the EPS system is decomposed into subsystems and components, and the familiar failure modes and undesired top events are separately divided into several categories. Then a comprehensive DFMEA for every single potential failure mode is carried out without omission as far as possible. The qualitative FTA is put into practice to identify the weak link as well. Since the DFMEA and FTA for EPS are finished, countermeasures for each potential hazard should be taken to guarantee the safety and reliability of EPS which are always achieved by fault detection and fault isolation algorithms of EPS hardware and software. Besides, some preventive actions are also taken in the early design stage to find out the potential causes.

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Section: Introductionmentioning

confidence: 99%

Reliability improvement of electric power steering system based on ISO 26262

Tian

2013

2013 International Conference on Quality, Reliability, Risk, Maintenance, and Safety Engineering (QR2MSE)

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“…Return control can bring the steering wheel back to the center position using steering angle control and improve the returnability. Badawy et al [1] proposed return curves for return control. Both low-speed and highway return curves are functions of the steering angle.…”

Section: Introductionmentioning

confidence: 99%

Compensation of Input Disturbance in EPS System Using Sliding Mode Observer

Son

Park

Kum

et al. 2011

AMM

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Electric power steering is developed to reduce effort by providing steering assist to the driver of a vehicle. In recent years, a research regarding returnability is performed in order to improve driver's steering feeling. Returnability is affected to friction force in EPS system and reaction force through tire and rack. Usually in the EPS system, friction and Reaction force are uncertain components which are hard to measure. This paper introduces both estimation using sliding mode observer and control algorithm using input disturbance compensation for returnability of EPS system. And simulation confirms the results of the estimation and control algorithm.

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“…The ondemand nature of electrical actuation eliminates the parasitic losses associated with open-centre hydraulic power steering. EPS also provides packaging and environmental benefits relative to the hydraulic system it replaces [1,2].…”

Section: Introductionmentioning

confidence: 99%

Synthetic torque feedback to improve heavy vehicle drivability

Williams

2009

Proceedings of the Institution of Mechanical Engineers, Part D:

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TRW has recently launched an electrically powered, computer-controlled enhancement to commercial vehicle steering systems. ColumnDrive, the new component, precisely controls torque feedback to the driver, resulting in a synthetic or artificial steering feel. Synthetic torque feedback is most effective at masking non-linearities in the steering system that degrade the on-centre lane-keeping properties of the vehicle, as well as providing an unprecedented level of speed proportionality so that parking efforts can be optimized independently of on-centre stability. The new ColumnDrive and existing electrical powersteering control architectures are compared, and actual vehicle performance data are presented.

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The Design and Benefits of Electric Power Steering

Cited by 12 publications

References 0 publications

Reliability improvement of electric power steering system based on ISO 26262

Reliability improvement of electric power steering system based on ISO 26262

Compensation of Input Disturbance in EPS System Using Sliding Mode Observer

Synthetic torque feedback to improve heavy vehicle drivability

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