Certification of Highly Complex Safety-Related Systems

• Autorzy: Reinert D. , Schaefer M.
• Języki publikacji: EN

Abstrakty

EN

The BIA has now 15 years of experience with the certification of complex electronic systems for safety-related applications in the machinery sector. Using the example of machining centres, this presentation will show the systematic procedure for verifying and validating control systems using Application Specific Integrated Circuits (ASICs) and microcomputers for safety functions. One section will describe the control structure of machining centres with control systems using “ integrated safety.” A diverse redundant architecture combined with crossmonitoring and forced dynamisation is explained. In the main section the steps of the systematic certification procedure are explained showing some results of the certification of drilling machines. Specification reviews, design reviews with test case specification, statistical analysis, and walk-throughs are the analytical measures in the testing process. Systematic tests based on the test case specification, Electro Magnetic Interference (EMI) and environmental testing, and site acceptance tests on the machines are the testing measures for validation. A complex software driven system is always undergoing modification. Most of the changes are not safety-relevant but this has to be proven. A systematic procedure for certifying software modifications is presented in the last section of the paper.

Słowa kluczowe

EN

certification; complex electronic systems; numerical controller; power drive; machining centre; validation; verification; microcomputer; metrics; software

PL

certyfikacja; systemy elektroniczne; centra obróbkowe; mikrokomputery; oprogramowanie

• Wydawca: Taylor & Francis
• Czasopismo: International Journal of Occupational Safety and Ergonomics
• Rocznik: 1999
• Tom: Vol. 5, No. 4
• Strony: 537--552
• Opis fizyczny: Bibliogr. 10 poz., rys., tab.

Twórcy

autor

Reinert D.

• Berufsgenossenschaftliches Institut fur Arbeitssicherheit, Sankt Augustin, Germany

autor

Schaefer M.

• Berufsgenossenschaftliches Institut fur Arbeitssicherheit, Sankt Augustin, Germany

Bibliografia

• [1] Council Directive 89/392/EEC of June 14, 1989 on the approximation of the laws of the Member States relating to machinery. Official Journal of the European Community, No. L 183, June 29, 1989, p. 9.
• [2] Deutsches Institut für Normung (DIN). (1990). Grundsätze für Rechner in Systemen mit Sicherheitsaufgaben, mit Anhang A1 [Principles for computers in safety-related systems with annex A] (Standard No. DIN V VDE 0801:1990). Berlin, Germany: Beuth-Verlag.
• [3] Dumke, R. (1992). Softwareentwicklung nach Maß. Schtäzen-Messen-Bewerten [Adapted software development. Estimation-Measurements-Assessment], Braunschweig, Germany: Vieweg.
• [4] European Committee for Standardization (CEN). (1996). Safety of machinery-Principles for risk assessment (Standard No. EN 1050:1996). Brussels, Belgium: Author.
• [5] European Committee for Standardization (CEN). (1997). Machine tools- Safety Machining centres (Draft Standard No. prEN 12417:1997). Author: Brussels, Belgium.
• [6] European Committee for Standardization (CEN). (1997). Safety of machinery-Safety-related parts of control systems. Part 1: General principles for design (Standard No. EN 954-1:1997). Brussels, Belgium: Author.
• [7] International Electrotechnical Commission (IEC). (1998). Functional safety of electrical/ electronic/programmable electronic safety-related systems. Parts 1-7 (Standards No. IEC 61508-1-61508-8:1998). Geneva, Switzerland: Author.
• [8] McCabe, T.J. (1976). A complexity measure. IEEE Transactions on Software Engineering, 2, 308-320.
• [9] Reinert, D., & Schaefer, M. (1998). Integrated safety in flexible manufacturing systems. In R.D. Schraft, G. Brandenburg, & W. Leidig, (Eds.), Tagungsband SPS/IPC/DRIVES (pp. 305-314). Heidelberg, Germany: Hüthig-Verlag.
• [10] Umbreit, M., & Zinken, E. (1995). Drehzahl und Betriebshalt bei Werkzeugmaschinen sicher beherrschen [Speed and operational stop of machine tools safely controlled]. Antriebstechnik, 5, 34-38.