Are collaborative robots safe?

    Research output: Contribution to journalArticle in a proceedings journalScientificpeer-review

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    Abstract

    Collaborative robots (cobots) market is supposed to increase rapidly. Although cobots are safer than their ancestors, industrial robots, there are some safety issues. The risk assessment for cobots is difficult since the cobots are working beside humans. In most of the applications the cobots can be safe. Sharp tools or objects and risk of impact to head are excluded from the common applications due to their risks. The common idea is to apply power and force limitation to ensure safe performance of cobots. The speed of the robot has huge effect on the impact force. Speed reduction with adequate safety controls can decrease the impact force to acceptable level in most of the applications. If there are severe risks in the robot cell, then it is possible to apply adequate separation distance between human and robot or safety-rated monitored stop to ensure safety and relatively close vicinity between human and the robot. One issue is that the stopping performance is complex and currently it is difficult to predict. Quite often, the validation requires impact force/pressure measurements or impact modelling.
    Original languageEnglish
    Number of pages8
    JournalOpen Engineering
    Issue numberAutomation in Finland 2019 Special Issue
    Publication statusAccepted/In press - 15 Aug 2019
    MoE publication typeA4 Article in a conference publication
    EventAutomaatiopäivät23 - Oulu, Finland
    Duration: 15 May 201916 May 2019

    Fingerprint

    Robots
    Force measurement
    Industrial robots
    Pressure measurement
    Risk assessment

    Keywords

    • functional safety
    • collaborative robots
    • safety requirements
    • levels of collaboration

    Cite this

    Malm, T., Salmi, T., Marstio, I., & Aaltonen, I. (Accepted/In press). Are collaborative robots safe? Open Engineering, (Automation in Finland 2019 Special Issue).
    Malm, Timo ; Salmi, Timo ; Marstio, Ilari ; Aaltonen, Iina. / Are collaborative robots safe?. In: Open Engineering. 2019 ; No. Automation in Finland 2019 Special Issue.
    @article{74487708dd8247779e44e7c4b7d8ac3b,
    title = "Are collaborative robots safe?",
    abstract = "Collaborative robots (cobots) market is supposed to increase rapidly. Although cobots are safer than their ancestors, industrial robots, there are some safety issues. The risk assessment for cobots is difficult since the cobots are working beside humans. In most of the applications the cobots can be safe. Sharp tools or objects and risk of impact to head are excluded from the common applications due to their risks. The common idea is to apply power and force limitation to ensure safe performance of cobots. The speed of the robot has huge effect on the impact force. Speed reduction with adequate safety controls can decrease the impact force to acceptable level in most of the applications. If there are severe risks in the robot cell, then it is possible to apply adequate separation distance between human and robot or safety-rated monitored stop to ensure safety and relatively close vicinity between human and the robot. One issue is that the stopping performance is complex and currently it is difficult to predict. Quite often, the validation requires impact force/pressure measurements or impact modelling.",
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    year = "2019",
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    language = "English",
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    Malm, T, Salmi, T, Marstio, I & Aaltonen, I 2019, 'Are collaborative robots safe?', Open Engineering, no. Automation in Finland 2019 Special Issue.

    Are collaborative robots safe? / Malm, Timo; Salmi, Timo; Marstio, Ilari; Aaltonen, Iina.

    In: Open Engineering, No. Automation in Finland 2019 Special Issue, 15.08.2019.

    Research output: Contribution to journalArticle in a proceedings journalScientificpeer-review

    TY - JOUR

    T1 - Are collaborative robots safe?

    AU - Malm, Timo

    AU - Salmi, Timo

    AU - Marstio, Ilari

    AU - Aaltonen, Iina

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    AB - Collaborative robots (cobots) market is supposed to increase rapidly. Although cobots are safer than their ancestors, industrial robots, there are some safety issues. The risk assessment for cobots is difficult since the cobots are working beside humans. In most of the applications the cobots can be safe. Sharp tools or objects and risk of impact to head are excluded from the common applications due to their risks. The common idea is to apply power and force limitation to ensure safe performance of cobots. The speed of the robot has huge effect on the impact force. Speed reduction with adequate safety controls can decrease the impact force to acceptable level in most of the applications. If there are severe risks in the robot cell, then it is possible to apply adequate separation distance between human and robot or safety-rated monitored stop to ensure safety and relatively close vicinity between human and the robot. One issue is that the stopping performance is complex and currently it is difficult to predict. Quite often, the validation requires impact force/pressure measurements or impact modelling.

    KW - functional safety

    KW - collaborative robots

    KW - safety requirements

    KW - levels of collaboration

    M3 - Article in a proceedings journal

    JO - Open Engineering

    JF - Open Engineering

    SN - 2391-5439

    IS - Automation in Finland 2019 Special Issue

    ER -

    Malm T, Salmi T, Marstio I, Aaltonen I. Are collaborative robots safe? Open Engineering. 2019 Aug 15;(Automation in Finland 2019 Special Issue).