Lars Mikelsons
Bosch Rexroth AG, Lohr am Main, Germany
Zhou Su
Bosch Rexroth AG, Lohr am Main, Germany
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http://dx.doi.org/10.3384/ecp14096455Published in: Proceedings of the 10th International Modelica Conference; March 10-12; 2014; Lund; Sweden
Linköping Electronic Conference Proceedings 96:48, p. 455-464
Published: 2014-03-10
ISBN: 978-91-7519-380-9
ISSN: 1650-3686 (print), 1650-3740 (online)
Safety of machinery is the most critical issue in the design of mechatronic systems. The verification and validation procedure for functional safety of machinery is thoroughly discussed in ISO 13849-2. Following this procedure; the system behavior in case of a component failure has to be analyzed. Up to now this analysis bases on expert knowledge and real experiments. In this contribution a simulation based approach is presented. This approach has several advantages over the state-of-the-art. First; real experiments are more time consuming and costly than simulation. Moreover; according models can be used for further investigations like optimizing the sensor setup.
To enable failure simulation as a substitute of testing on real machinery for validation of functional safety; typical hydraulic failures are added to safety-related components of an in-house Modelica hydraulics library. This library is then used for the verification and validation of functional safety of a hydraulic test bench. Moreover; error propagation is considered.
[1] ISO 13849-1: Safety of machinery-safety-related parts of control systems - Part 1: General principles for design. International Organization for Standardization (ISO), 2006.
[2] ISO 13849-2: Safety of machinery-safety-related parts of control systems - Part 2: Validation.
International Organization for Standardization (ISO), 2010.
[3] Bertsche B. Reliability in Automotive and Mechanical Engineering. VDI-Buch, Springer-Verlag Berlin Heidelberg, 2008.
[4] Barg J., Eisenhut-Fuchsberger F., Orth A. 10 steps to peformance level - Handbook for the implementation of functional safety according to ISO 13849, 2012, Bosch Rexroth AG
[5] Sierla S., Tumer I., Papakonstantinou N., Koskinen K., Jensen D. Early integration of safety to the mechatronic system design process by the functional failure indentification and propagation framework. In: Mechatronics, Volume 22, 2012.
[6] Belmonte F., Schön W., Heurley L., Capel R. Interdisciplinary safety analysis of complex sociotechnological systems based on the functional resonance accident model: An application to railway traffic supervision. In: Reliability Engineering and System Safety, Volume 96, 2010.
[7] Deng A., Britton G., Tor S. Constraint-based functional design verification for conceptual design. In: Computer-Aided Design, Volume 32, 2000.
[8] David P., Idasiak V., Kratz F. Reliability study of complex physical systems using SysML. In:Reliability Engineering and System Safety, Volume 95, 2009.
[9] Schamai W., Fritzson P., Paredis, C., Pop A. Towards unified system modeling and simulation with ModelicaML: modeling of executable behavior using graphical notations, In: Proceedings 7th Modelica Conference, Como, Italy, 2009.
[10] Athanasatos P., Costopoulos T. Proactive fault finding in a 4/3-way direction control valve of a high pressure hydraulic system using the bond graph method with digital simulation, In: Mechanism and Machine Theory, Volume 50, 2012.
