A verification method and system for safety of expected functions of an autonomous vehicle

A technology for autonomous driving and expected functions, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as lack of safety analysis methods that cannot cover expected function safety, and achieve the effect of strong operability

Pending Publication Date: 2019-06-14
TONGJI UNIV
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  • Application Information

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Problems solved by technology

However, the safety analysis methods proposed in the existing functional safety standards cannot cover the expected functional safety issues, and the expected f

Method used

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  • A verification method and system for safety of expected functions of an autonomous vehicle
  • A verification method and system for safety of expected functions of an autonomous vehicle
  • A verification method and system for safety of expected functions of an autonomous vehicle

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Embodiment

[0029] The method for evaluating the expected functional safety of an autonomous vehicle in the present invention is applicable to autonomous vehicles in various application scenarios, including autonomous vehicles of SAE L3 and above.

[0030] In this embodiment, the evaluated object is an SAE L3 level self-driving vehicle, defined as AV1, and the specific evaluation steps are as follows:

[0031] S1-1: According to the AV1 function definition and system architecture, the STPA method is used to construct the AV1 function control structure diagram. This embodiment takes the AV1 obstacle avoidance function as an example. The related control structure of the obstacle avoidance function is as follows image 3 shown;

[0032] S1-2: Determine the list of all potential dangerous events of the AV1 obstacle avoidance function, and derive the trigger events corresponding to the dangerous events and the probability of the trigger events;

[0033] The function definition and system arch...

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Abstract

The invention relates to a verification method and system for safety of expected functions of an autonomous vehicle, and the method comprises the steps of determining a dangerous event and a trigger event based on a system framework of a target vehicle; assessing and screening dangerous events; determining the acceptance degree of the trigger event; and verifying whether the trigger event satisfies the preset acceptance degree. The system comprises a first platform which is used for identifying a dangerous event of the autonomous vehicle and exporting a corresponding trigger event and a trigger event probability, and a second platform which is used for exporting a dangerous event of the autonomous vehicle, determining the ASIL level of the dangerous event and determining a corresponding trigger event tolerance or error rate target according to the ASIL level and the corresponding trigger event probability; a third platform which is used for reproducing the trigger event, testing the autonomous vehicle and verifying whether the trigger event reaches a set target or not. According to the present invention, the requirement for expected function safety assessment in the function development of the autonomous vehicle is met; the quantitative and verifiable evaluation requirements are provided, and the operability is high.

Description

technical field [0001] The invention relates to the technical field of autonomous vehicle manufacturing, in particular to a method and system for verifying the expected functional safety of autonomous vehicles. Background technique [0002] For a complex system such as an autonomous vehicle, the realization of its overall function depends on the coordinated work of multiple sensors, controllers, actuators and complex software algorithms. This makes self-driving cars, in addition to the functional safety problems of traditional cars caused by electronic and electrical system failures, also face the expected functional safety problems caused by hardware performance limitations such as sensors or human misoperation under the condition of no fault failure. Therefore, the analysis and evaluation requirements for the expected functional safety are raised during the functional development of autonomous vehicles. [0003] The International Organization for Standardization ISO offic...

Claims

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Application Information

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IPC IPC(8): G06F17/50
Inventor 陈君毅邢星宇周堂瑞熊璐
Owner TONGJI UNIV
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