Minimizing Development Cost With Reliability Goal for Automotive Functional Safety During Design Phase

Xie, Guoqi; Chen, Yuekun; Liu, Yan; Li, Renfa; Li, Keqin

doi:10.1109/tr.2017.2778070

Cited by 31 publications

(16 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thereby, the CPU load will exceed its limits enough to make the system not performing at all. As a result, this is a high-cost inefficient design choice [25].…”

Section: Figure 3 Example Of Ffi Due To Information Exchange Interfementioning

confidence: 99%

ISO-26262 Compliant Safety-Critical Autonomous Driving Applications: Real-Time Interference-Aware Multicore Architectures

El-Bayoumi¹

2021

IJSSE

View full text Add to dashboard Cite

Over the decades, autonomous vehicles have been developed and qualified using variant single-core architectures. With the evolutionary trend of safety critical applications, innovative safety design methodologies have raised present requirements constraints and limitations to mitigate such design complexity deviations. The main objectives of this work are to investigate, evaluate and introduce an efficient safety-critical multi-cache multicore architecture, that is fully compliant with methods and principles of ISO 26262. Moreover, this paper presents new safety design choices applied to timing monitoring, temporal protection, runtime monitoring and services protection to overcome multicore processor challenges in runtime that eventually decay the worst case execution time and the interconnections (symmetric and asymmetric processors, critical timing, data coherency and synchronization predictability, core interconnects, etc.), as well as to tolerate real-time interference faults.

show abstract

“…Thereby, the CPU load will exceed its limits enough to make the system not performing at all. As a result, this is a high-cost inefficient design choice [25].…”

Section: Figure 3 Example Of Ffi Due To Information Exchange Interfementioning

confidence: 99%

ISO-26262 Compliant Safety-Critical Autonomous Driving Applications: Real-Time Interference-Aware Multicore Architectures

El-Bayoumi¹

2021

IJSSE

View full text Add to dashboard Cite

show abstract

“…A common measurement method for thermal impedance is to heat the measured object to a steady state using the heating source with constant power, then remove the heating source and record the cooling curve. According to the definition of thermal impedance as shown in (23), the data of (t, ( )) can be obtained. The larger the sampling frequency of the cooling curve is, the higher the precision of the fitting Foster model will be.…”

Section: ) Measurement Of the Thermal Impedancementioning

confidence: 99%

“…The short-circuit operation is caused when one IGBT is conducting, and the opposite is switched on, which is different from the ASC operation mechanism [6]. With respect to the ASC mode, it serves as a protection mechanism according to the functional safety standards for vehicle ISO 26262 [23,24]. Three high-side IGBTs or three low-side IGBTs are switched on during the ASC operation and the three phases of the motor are short circuited via the high-side IGBTs or the low-side IGBTs, respectively [21].…”

Section: Introductionmentioning

confidence: 99%

IGBT Junction Temperature Measurement Under Active-Short-Circuit and Locked-Rotor Modes in New Energy Vehicles

Zhu

Xiao

et al. 2020

IEEE Access

View full text Add to dashboard Cite

Active-short-circuit and locked-rotor modes are common abnormal operations in new energy vehicles. The IGBT junction temperature measurement for these two operating conditions is a challenging problem due to the unexpected large current and the asymmetric operation of semiconductor chips. In addition, different cooling flow rates have a significant influence on the heat dissipation, which will also have an impact on the building of the thermal model. Based on these difficulties, a modified Foster thermal network under active-short-circuit and locked-rotor modes has been presented considering different cooling conditions. The power loss models of the semiconductor chip under abnormal conditions are developed and a modified Foster thermal network based on the NTC temperature sensor is proposed. The model can be adapted to different cooling conditions since the thermal impedance fluctuates slightly at different cooling flow rates. The proposed thermal model is verified with inverter application under active-short-circuit and locked-rotor modes and the experimental performance shows good accuracy compared with the infrared camera measurement results. INDEX TERMS Insulated gate bipolar transistors(IGBTs);active short circuit(ASC) mode; locked-rotor mode; thermal models.

show abstract

“…Unlike the requirement of maximum likelihood estimation approach for closed-form likelihood function, full Bayesian estimation does not need closed-form likelihood functions [11]. Therefore, full Bayesian estimation can handle sophisticated models.…”

Section: A Full Bayesian Estimationmentioning

confidence: 99%

Exploring Risk Factors With Crashes by Collision Type at Freeway Diverge Areas: Accounting for Unobserved Heterogeneity

Guo

Liu

et al. 2019

IEEE Access

View full text Add to dashboard Cite

The objective of this paper is to evaluate the impact of various risk factors on traffic crashes presenting different collision types at freeway diverge areas. Three-year period crash data from 367 freeway diverge areas were obtained. Three types of collisions, including rear-end, sideswipe, and angle collisions, were considered. A random parameters multivariate Poisson-lognormal (RP-MVPLN) model was developed to accommodate both correlations between crashes across collision type and the unobserved heterogeneity across observations. For the performance comparison, an MVPLN was developed and compared with the RP-MVPLN model under the Bayesian framework. The result showed that the RP-MVPLN model outperformed the MVPLN model, which highlighted that accounting for the unobserved heterogeneous effects of risk factors could improve the model fit. The model estimation result showed that the risk factors, as well as their impacts on different collision types, were different. The mainline annual average daily traffic (AADT), the lane-balanced design, and the number of lanes on the mainline were found to be significantly associated with all types of collisions, whereas the deceleration lane length and road surface type only affected rear-end crashes. The exit ramp length and ramp AADT had significant impact on rear-end crashes and sideswipe crashes, but they did not affect angle crashes. The speed limit was negatively related with rear-end crashes and angle crashes, while it had no impact on sideswipe crashes. Three risk factors, which are the mainline AADT, ramp AADT, and speed limit, were found to have significant heterogeneous effects on crashes across observations. INDEX TERMS Collision type, freeway diverge area, random parameters, multivariate model, full Bayesian estimation.

show abstract

Minimizing Development Cost With Reliability Goal for Automotive Functional Safety During Design Phase

Cited by 31 publications

References 34 publications

ISO-26262 Compliant Safety-Critical Autonomous Driving Applications: Real-Time Interference-Aware Multicore Architectures

ISO-26262 Compliant Safety-Critical Autonomous Driving Applications: Real-Time Interference-Aware Multicore Architectures

IGBT Junction Temperature Measurement Under Active-Short-Circuit and Locked-Rotor Modes in New Energy Vehicles

Exploring Risk Factors With Crashes by Collision Type at Freeway Diverge Areas: Accounting for Unobserved Heterogeneity

Contact Info

Product

Resources

About