WSEAS Transactions on Environment and Development
Print ISSN: 1790-5079, E-ISSN: 2224-3496
Volume 18, 2022
“Safety-rated Monitored Stop” Collaborative Operation Function for Industrial Robots: a Simple Model for Functional Analysis Purposes
Authors: , ,
Abstract: Collaborative robot operations are standardized since, in consideration of the shared workspace, operators are exposed to possible contact with moving parts of robots. Collisions with humans can be extremely hazardous: for this reason, “safety functions”, based on sensors, actuators and control systems, are adopted. If there is a failure in one of these components, an accident can happen. Among the safety functions used, depending on the collaborative application, there is the “safety-rated monitored stop”. Functional safety analysis can help system designers and integrators to certify the achievement of the required objectives for the chosen safety function. In the present paper, a similar analysis is carried out for the safety-rated monitored stop function. The method chosen, depicted with an example, is based on applicable standards.
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Keywords: Collaborative robot operation, safety-rated monitored stop, average frequency of dangerous failures (PFH), failure rate, safe failures, dangerous failures, safe failure fraction (SFF), diagnostic coverage (DC), common cause failures (CCF), reliability model
Pages: 504-514
DOI: 10.37394/232015.2022.18.49