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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

机译:根据ISO 13849:2006标准简化机器中控制系统安全相关部件设计的新方法

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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 This standard replaced the previous EN 954-1:1997 standard (withdrawn on December 31st, 2001) and introduced new concepts to adapt the designs to more demanding safety requirements.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. (C) 2018 Elsevier Ltd. All rights reserved.
机译:安全是机器生命周期所有阶段中考虑的生产系统的基本要求。由于其对避免事故和伤害的重要性,几十年来,立法已明确规定了安全规范。如今,越来越多的机械安全功能根据ISO 13849-1:2006进行设计和验证。该标准替代了先前的EN 954-1:1997标准(于2001年12月31日撤回),并引入了新的概念以使设计适应更苛刻的安全要求。 ISO 13849-1:2006中规定的用于设计控制系统安全相关部件(SRP / CS)的工作流基于反复试验的程序,其结果可能远非最佳的折衷方案。经济成本和安全能力。此外,这种方法增加了选择适当的SRP / CS组件所需的时间。在本文中,我们提出了一种根据ISO 13849-1:2006设计SRP / CS的新方法。我们的建议重新考虑了当前的设计过程,以便提供新颖的准则来减少时间和成本投资。本文讨论的理论思想已在新的软件工具中实施,该工具已通过两个实际案例进行了评估,其结果在本文中进行了讨论。 (C)2018 Elsevier Ltd.保留所有权利。

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