Survey on Fault-Tolerant Vehicle Design

Wanner, Daniel; Trigell, Annika Stensson; Drugge, Lars; Jerrelind, Jenny

doi:10.3390/wevj5020598

Cited by 13 publications

(16 citation statements)

References 69 publications

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“…Even though some fault groups were based on purely mechanical or hydraulic faults, the main focus was placed on faults of the electric driveline. This decision is supported by the findings in [6] that two-thirds of all vehicle breakdowns are of an electric nature. Faults of E/E components that lead to vehicle failures or malfunctions appear in general more randomly than mechanical or hydraulic faults.…”

Section: Fault Collection and Groupingmentioning

confidence: 75%

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Fault classification method for the driving safety of electrified vehicles

Wanner

Drugge

Trigell

2014

Vehicle System Dynamics

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A fault classification method is proposed which has been applied to an electric vehicle. Potential faults in the different subsystems that can affect the vehicle directional stability were collected in a failure mode and effect analysis. Similar driveline faults were grouped together if they resembled each other with respect to their influence on the vehicle dynamic behaviour. The faults were physically modelled in a simulation environment before they were induced in a detailed vehicle model under normal driving conditions. A special focus was placed on faults in the driveline of electric vehicles employing in-wheel motors of the permanent magnet type. Several failures caused by mechanical and other faults were analysed as well. The fault classification method consists of a controllability ranking developed according to the functional safety standard ISO 26262. The controllability of a fault was determined with three parameters covering the influence of the longitudinal, lateral and yaw motion of the vehicle. The simulation results were analysed and the faults were classified according to their controllability using the proposed method. It was shown that the controllability decreased specifically with increasing lateral acceleration and increasing speed. The results for the electric driveline faults show that this trend cannot be generalised for all the faults, as the controllability deteriorated for some faults during manoeuvres with low lateral acceleration and low speed. The proposed method is generic and can be applied to various other types of road vehicles and faults.

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Section: Fault Collection and Groupingmentioning

confidence: 75%

“…[6] A new type of vehicular system is appearing with the increase in EVs comprising E/E components and subsystems. Since there is little experience of failures in EVs at present, the research work presented in this article focuses on vehicles with an electric driveline.…”

Section: Introductionmentioning

confidence: 99%

Fault classification method for the driving safety of electrified vehicles

Wanner

Drugge

Trigell

2014

Vehicle System Dynamics

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“…However, the specific challenges of FM for EPA are distinct from those of existing electrical propulsion applications in terms of safety-critical electrical loads, mass production of highly reliable aircraft systems and stringent weight constraints. For example, whilst the Electric Vehicle (EV) industry has given much focus to the development of fault tolerant electrical propulsion systems [18]- [20] and maintaining safety-critical functions, no early-stage architecture design methodology was identified in the literature which was equivalent in terms of addressing the level of uncertainty surrounding the design of future EPA and the lack of suitable FM technologies (which may drive the need for a novel approach to fault tolerant designs).…”

Section: Unique Challenge Of Epa Electrical Architecturesmentioning

confidence: 99%

A Fault Management-Oriented Early-Design Framework for Electrical Propulsion Aircraft

Flynn

Jones

Norman

et al. 2019

IEEE Trans. Transp. Electrific.

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Electrical propulsion has been identified as a key enabler of greener, quieter, more efficient aircraft. However, electrical propulsion aircraft will need to demonstrate a level of safety and reliability at least equal to current aircraft to be a viable alternative. Therefore, a robust and reliable fault management system is needed to prevent electrical faults causing loss of propulsion and critical flight functions. To date, fault management of the electrical propulsion system has not been considered in detail for future electrical propulsion aircraft, nor has it been effectively integrated into the electrical architecture design. This poses a risk that the proposed electrical architectures will be infeasible from a fault management perspective, and key fault management technologies may not be sufficiently developed. Therefore, a methodology to incorporate fault management into the early stages of design of electrical architectures is required to determine viable fault management solutions for a given electrical propulsion aircraft concept. This paper describes a novel, systems-level electrical architecture design framework for electrical propulsion aircraft which incorporates fault management from the outset. This methodology captures the significant assumptions in the design and acknowledges the novel interfaces which exist between the electrical, conceptual and fault management design of electrical propulsion aircraft.

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“…Who is responsible? An excellent survey on fault-tolerant vehicle design can be found in [44]. They highlight that driveline electrification and new chassis systems enables higher levels of redundancy but also increase the number of fault possibilities.…”

Section: System Safety and Fault-tolerant Actuationmentioning

confidence: 99%

Trends in vehicle motion control for automated driving on public roads

Klomp

Jonasson

Laine

et al. 2019

Vehicle System Dynamics

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In this paper we describe how vehicle systems and the vehicle motion control are affected by automated driving on public roads. We describe the redundancy needed for a road vehicle to meet certain safety goals. The concept of system safety as well as system solutions to fault tolerant actuation of steering and braking and the associated fault tolerant power supply is described. Notably restriction of the operational domain in case of reduced capability of the driving automation system is discussed. Further we consider path tracking, state estimation of vehicle motion control required for automated driving as well as an example of a minimum risk maneuver and redundant steering by means of differential braking. The steering by differential braking could offer heterogeneous or dissimilar redundancy that complements the redundancy of described fault tolerant steering systems for driving automation equipped vehicles. Finally the important topic of verification of driving automation systems is addressed.

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Survey on Fault-Tolerant Vehicle Design

Cited by 13 publications

References 69 publications

Fault classification method for the driving safety of electrified vehicles

Fault classification method for the driving safety of electrified vehicles

A Fault Management-Oriented Early-Design Framework for Electrical Propulsion Aircraft

Trends in vehicle motion control for automated driving on public roads

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