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A new methodology for facilitating the design of safety-related parts of control systems in machines according to ISO 13849:2006 standard

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  • Porras-Vázquez, Alberto
  • Romero-Pérez, Julio-Ariel

Abstract

Safety is a fundamental requirement of production systems considered throughout all the stages of a machine’s lifecycle. Due to its importance to avoid accidents and injuries, safety specifications have been explicitly regulated by legislation over decades. Nowadays, safety functions of machinery are increasingly designed and validated according to ISO 13849-1:2006. This standard replaced the previous EN 954-1:1997 standard (withdrawn on December 31st, 2001) and introduced new concepts to adapt the designs to more demanding safety requirements. The workflow stated in ISO 13849-1:2006 for designing safety-related parts of control systems (SRP/CS) is based on a trial-and-error procedure whose result could be far from an optimal solution in terms of trade-off between economic cost and safety capabilities. Furthermore, this approach increases the time needed for selecting adequate SRP/CS components. In this paper, we present a new methodology for designing SRP/CS according to ISO 13849-1:2006. Our proposal reconceives the current design process in order to offer novel guidelines to reduce both time and cost investment. The theoretical ideas examined here have been implemented in a new software tool which has been evaluated through two practical cases, the results of which are discussed in the paper.

Suggested Citation

  • Porras-Vázquez, Alberto & Romero-Pérez, Julio-Ariel, 2018. "A new methodology for facilitating the design of safety-related parts of control systems in machines according to ISO 13849:2006 standard," Reliability Engineering and System Safety, Elsevier, vol. 174(C), pages 60-70.
    • Handle: RePEc:eee:reensy:v:174:y:2018:i:c:p:60-70
    DOI: 10.1016/j.ress.2018.02.018
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    References listed on IDEAS

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    1. Hietikko, Marita & Malm, Timo & Saha, Heikki, 2015. "Comparing performance level estimation of safety functions in three distributed structures," Reliability Engineering and System Safety, Elsevier, vol. 134(C), pages 218-229.
    2. Hietikko, Marita & Malm, Timo & Alanen, Jarmo, 2011. "Risk estimation studies in the context of a machine control function," Reliability Engineering and System Safety, Elsevier, vol. 96(7), pages 767-774.
    3. Jocelyn, Sabrina & Baudoin, James & Chinniah, Yuvin & Charpentier, Philippe, 2014. "Feasibility study and uncertainties in the validation of an existing safety-related control circuit with the ISO 13849-1:2006 design standard," Reliability Engineering and System Safety, Elsevier, vol. 121(C), pages 104-112.
    4. Poisson, Pascal & Chinniah, Yuvin & Jocelyn, Sabrina, 2016. "Design of a safety control system to improve the verification step in machinery lockout procedures: A case study," Reliability Engineering and System Safety, Elsevier, vol. 156(C), pages 266-276.
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