Life usage monitoring systems contain two areas of fundamental interest for validation, namely the correct functionality of the life usage monitoring algorithms and robust implementation. The functionality of the algorithms is validated against the entire lifing process. Since it is not possible to check the results of the monitoring algorithms against a statistically representative large number of missions calculated by the design tool, a numerical simulation of this process is required. A procedure based on the Monte Carlo technique has been developed, which allows the assessment of the deviation of the monitoring results in terms of average and scatter from the 'truth'. To validate the correct function in the target system, recorded input parameters in form of digitised sets are fed in. With indentical inputs to the reference programs and the on-board versions of the algorithms, it is possible to obtain bitwise identical results between both implementations. Integration tests and flight tests concentrate on the robustness of interfaces and on the behaviour of the monitoring system under non-standard operating modes. Accessibility and data transfer are important in early stages of development, e.g. with prototype installation. To involve intended customers of the monitoring system into the testing process often reveals problems not covered in the specification of system or software.
The importance of testing for successful life usage monitoring systems
Wichtigkeit der Prüfung für erfolgreiche Einsatzüberwachungssysteme
1998
20 Seiten, 7 Bilder, 17 Quellen
Aufsatz (Konferenz)
Englisch