Reactive-Replay Approach for Verification and Validation of Closed-Loop Control Systems in Early Development

Resource type
Johannes Bach, Marc Holzäpfel, Stefan Otten, Eric Sax
SAE Technical Paper 2017-01-1671
Book title
WCX™ 17: SAE World Congress Experience
SAE International
Enhanced technological capabilities render the application of various, increasingly complex, functional concepts for automated driving pos-sible. In the process, the significance of automotive software for a satisfactory driving experience is growing. To benefit from these new opportunities, thorough assessment in early development stages is highly important. It enables manufacturers to focus resources on the most promising concepts. For early assessment, a common approach is to set up vehicles with additional prototyping hardware and per-form real world testing. While this approach is essential to assess the look-and-feel of newly developed concepts, its drawbacks are re-duced reproducibility and high expenses to achieve a sufficient and balanced sample. To overcome these drawbacks, new flexible, realis-tic and preferably automated virtual test methods to complement real world verification and validation are especially required during early development phases. In this contribution, we present a method for au-tomated system assessments based on the reuse of recorded driving data in closed-loop simulation and its application in early develop-ment of a predictive cruise control system. Firstly, we identify the re-quirements for early assessment of closed-loop system concepts, ana-lyze the eligibility of established methods regarding the identified re-quirements and describe open challenges for development of automo-tive software systems with focus on early development stages. Our previously introduced Reactive-Replay approach addresses these challenges by enabling reuse of recorded driving data in closed-loop simulation. We complement this approach by introducing automated assessments for evaluation of software increments. By integrating pe-riodic assessments into the development process, we achieve continu-ous tracking of software quality with very small effort. It is shown that the provision of a broad data pool for simulation based evalua-tion of new and refined concepts contributes to a substantial reduc-tion of real world test mileage in early development stages.
Online Sources
Research focus
Virtual Prototyping and Life Cycle Management, Safe and Intelligent Vehicles
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