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Scenario-Based Specification of Automotive Requirements With Quantitative Constraints and Synthesis of SL/SF Monitors

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3 Author(s)
Silky Arora ; India Science Lab, General Motors R&D, Bengaluru, India ; Ambar A. Gadkari ; S. Ramesh

Requirements of embedded systems often describe the system behavior with quantitative constraints over parameters such as timing, memory, and other resources. In this letter, we present a visual language suited for scenario-based specification of requirements with quantitative constraints. Our language, known as event sequence charts with quantitative constraints (ESC-QC), is inspired by message sequence charts (MSC) and its variants. We introduce ESC-QC notations through an example from automotive requirements and then describe the formal syntax and semantics. Besides being useful for formal documentation and analysis of system requirements, ESC-QC specifications can be translated into monitors and used for run-time verification of designs. In automotive systems Simulink/Stateflow (SL/SF) is widely used for design of control systems. We have developed an algorithm for automatic synthesis of SL/SF monitors from ESC-QC specifications. We have used this algorithm for generating monitors for verification of controller models from active safety and body control applications.

Published in:

IEEE Embedded Systems Letters  (Volume:3 ,  Issue: 2 )