A spatial and temporal partitioning approach for dependable automotive systems

Chabrol, Damien; Aussaguès, Christophe; David, Vincent

doi:10.1109/etfa.2009.5347125

Cited by 7 publications

(5 citation statements)

References 7 publications

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“…by using a watchdog. This kind of budgeting is for instance used in PharOS [7]. Then the recovery process is triggered with the result that the recent checkpoint group is re-executed.…”

Section: Recovery Processmentioning

confidence: 99%

Reliability analysis for MPSoCs with mixed-critical, hard real-time constraints

Axer

Sebastian

Ernst

2011

Proceedings of the Seventh IEEE/ACM/IFIP International Conference on Hardware/Software Codesign and System Synthesis

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Methods such as rollback and modular redundancy are efficient to correct transient errors. In hard real-time systems, however, correction has a strong impact on response times, also on tasks that were not directly affected by errors. Due to deadline misses, these tasks eventually fail to provide correct service. In this paper we present a reliability analysis for periodic task sets and static priorities that includes realistic detection and roll-back scenarios and covers a hyperperiod instead of just a critical instant and therefore leads to much higher accuracy than previous approaches. The approach is compared with Monte-Carlo simulation to demonstrate the accuracy and with previous approaches covering critical instants to evaluate the improvements.

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“…by using a watchdog. This kind of budgeting is for instance used in PharOS [7]. Then the recovery process is triggered with the result that the recent checkpoint group is re-executed.…”

Section: Recovery Processmentioning

confidence: 99%

Reliability analysis for MPSoCs with mixed-critical, hard real-time constraints

Axer

Sebastian

Ernst

2011

Proceedings of the Seventh IEEE/ACM/IFIP International Conference on Hardware/Software Codesign and System Synthesis

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“…Four-wheel independent drive electric vehicle (4WID EV) does not need a transmission part, thus, the simplification of the structure increases the energy efficiency and maneuverability (see Chabrol et al, 2009; Larish et al, 2013; Li et al, 2012; Sakai et al, 1999; Shino et al, 2000; Shim and Margolis, 2004). As we know, if a 4WID EV travels on a low-attached road, the wheel is prone to slip, which may result in side slip, and lead to traffic accidents.…”

Section: Introductionmentioning

confidence: 99%

Variable gain control-based acceleration slip regulation control algorithm for four-wheel independent drive electric vehicle

Guo

Zou

et al. 2020

Transactions of the Institute of Measurement and Control

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In order to improve the dynamic performance and stability of general acceleration slip regulation (ASR) control technology for four-wheel independent drive electric vehicle (4WID EV), an ASR control strategy based on variable gain controller (VGC) is proposed in this paper. First of all, a road identification strategy is designed to identify the current road surface and calculate the optimal slip ratio of the road. Then, the optimal slip ratio is taken as the control target, and the ASR control strategy based on VGC is designed to keeps slip ratio around the optimum slip ratio through controlling the driving torque output, so wheels can make the best of road adhesion to prevent vehicle from slipping. Meanwhile, we analyze the control system state space, and build a scalar function of the system, and prove that the system satisfies Lyapunov large scale asymptotic stability theorem, so the parameters of the VGC does not affect the system stability. Then, in order to meet the requirement of quick dynamic response and no overshoot, parameters selection of VGC is deduced by mathematics. Finally, the co-simulation of Matlab/Simulink and Carsim results show that the proposed control strategy is with the better dynamics and stability, and can better prevent wheel slipping on various roads.

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“…The simplification of vehicle structure not only improves the flexibility of vehicle layout, but also greatly improves the transmission efficiency and maneuverability. [1][2][3][4][5][6] When a 4WID EV travels on a low-adhesion slope road, the wheel is prone to slipping, which may cause side slip and vehicle speed uncontrollable, and may lead to traffic accidents. Therefore, acceleration slip regulation (ASR) control strategy for slope drive of 4WID EV is particularly important.…”

Section: Introductionmentioning

confidence: 99%

A state observation and torque compensation–based acceleration slip regulation control approach for a four-wheel independent drive electric vehicle under slope driving

Guo

Zou

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part D:

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Wheel slipping of four-wheel independent drive electric vehicle on slope will reduce vehicle controllability and driving stability, thereby reducing vehicle safety. In order to solve the problem of wheel slipping and optimize the speed control performance of four-wheel independent drive electric vehicle on slope, an acceleration slip regulation control strategy of slope drive is proposed in this paper. First, we design a road identification algorithm to identify the current road conditions of the four-wheel independent drive electric vehicle, and calculate the optimal slip ratio of the current road surface by curve fitting method. Then, with the optimal slip ratio as the control objective, the acceleration slip regulation control strategy is designed to maximize the utilization of wheel adhesion coefficient to prevent wheel slip. Third, a slope identification algorithm based on Luenberger state observer is designed to identify the various slopes of the uphill and downhill road, after which a torque compensation algorithm is designed according to the identification slope, to compensate for the longitudinal component of vehicle gravity at different slopes. Fourth, a slope torque distribution algorithm is proposed based on acceleration slip regulation and slope identification. Finally, through the joint simulation platform of MATLAB/Simulink and CarSim, it is shown that the proposed control strategy can better restrain wheel slipping on the uphill and downhill road, and has better dynamic characteristics and stability.

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A spatial and temporal partitioning approach for dependable automotive systems

Cited by 7 publications

References 7 publications

Reliability analysis for MPSoCs with mixed-critical, hard real-time constraints

Reliability analysis for MPSoCs with mixed-critical, hard real-time constraints

Variable gain control-based acceleration slip regulation control algorithm for four-wheel independent drive electric vehicle

A state observation and torque compensation–based acceleration slip regulation control approach for a four-wheel independent drive electric vehicle under slope driving

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