Fault Injection Sample Clauses

Fault Injection. Fault injection is a fundamental technique required by ISO26262 norm to provide evidence that the obtained product complies with the safety requirements. Main goal of this technique is to support the assessment of: • the correct implementation of functional safety and technical safety requirements during: • HW/SW integration, system integration and vehicle integration phases, to verify that the integrated elements interact correctly. • HW development phase. • SW unit development phase and during SW unit integration on a SW architecture • the effectiveness of a safety mechanism's diagnostic coverage at the HW/SW development phase and failure coverage at system/vehicle level One of the main goals of the MAENAD project is to develop capabilities for modelling and analysis support, following ISO 26262. In this context, MAENAD language and related tools could provide support for experimental V&V activities based on fault injection technique with different scope: during the design phase of fault injection experiments, where models of the systems are used to transfer information useful for the design of test experiments according with the methods expressed by the norm, and during the execution of fault injection experiments. Across the whole WP6 analysis activities, a test bench will be used as a basis to evaluate, to some extent, the correctness of the results of the MAENAD Analysis workbenches and the related fitness of purpose from the user perspective, and to assess the capability of MAENAD to support V&V activities based on fault injection technique. The test bench, realized with Rapid control prototype technologies, is intended to close the loop between "design phase" and "production phase". The support for the analysis activities falls down in different application fields:
Sample 1
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Fault Injection. The test bench is designed to provide support for Fault injection experiment, especially those related to Integration phases (system level and vehicle level) of the safety lifecycle. Focus is on a subsystem of a real vehicle, interaction of this subsystem with the rest of the plant is emulated through dedicated HIL technologies. The following picture provide an overview on the physical demonstrator, green boxes highlight the real component of the physical test bench setup. Interaction of the physical components with the emulated subsystem is done through the communication network. ITEM •HVJB •PRND •Brake pdl EVC (simulated) Environment (Vehicle,road) INTERFACES •Motor •Battery •Power Electronics •Accelerator pedal (emulated) BatterySys HVJB Motor PRND Enviro ent FIU (Vehicle,roa ) EVC RPU Brake Pedal PowerElec Acc Pedal est achine contr l Figure 6-1:Test bench demonstrator concept and design diagram The following picture show the physical prototype of the selected subsystem Gas and brake pedals Mode Selector EVC Fault injection equipment Inverter/En gine A tool has been built to support the V&V activities. It takes as an input the file generated from an EAST ADL model and guide the user through the steps of Test setup/selection and test executions The following picture highlight the support from the EAST ADL language and the V&V activities The tools import the EAXML file generated from an EAST-ADL model. Through the parsing of the EAXML file, it extract all the Design function types and prototypes, the HW prototypes, the list of requirements and the association to model elements, the allocation of functions to HW elements, the description of Verification and Validation related items and the association of such elements to design functions. After the import, the user interface present to the user a list of the available functions on the subsystem and provide means to select one of them for a successive evaluation. From the link of requirements to design functions, the tool automatically extract the requirements related to the selected function. After the selection of the function, the tool filter and extracts automatically the associated V&VCases. and provide a means for the user to select one of them. Test Stimuli and expected outcomes are extracted automatically from the model, where the test procedure is described and references external file From the information about the functions to HW mapping, the tool extract the HW items associated to the selected ...
Sample 1

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