1. Force limiting was used in the vibration tests of many of the DS1 flight experiments and spacecraft components and on the assembled spacecraft and was extremely beneficial in avoiding unrealistic test failures. In all cases, the use of force limiting reduced the degree of over testing, without compromising the test objectives. In the DS1 spacecraft system test, the use of force limiting greatly simplified and expedited the conduct of the complex vibration test and also improved test safety. 2. All three components of the total input force vector, as well as the responses at over a hundred critical positions on the spacecraft, were monitored during the test. But only the total in-axis force signal and one response limit acceleration were needed in the controller feedback to notch the acceleration input. The force limits were derived using the semi-empirical method together with an extensive pretest analysis. The force specification in the test procedure was used without any modifications during the test. 3. During the DS1 spacecraft full-level vibration tests, the flight limit loads were achieved at a number of critical locations on the spacecraft and the instrument responses were similar to those in the assembly random vibration tests. 4. The system level random vibration test was very effective in identifying the equipment workmanship and problems on the assembled spacecraft. Therefore corrective actions to close out those problems could be taken to avoid launch and/ or flight problems. 5. Poor input spectrum control can arise in force and response limited vibration tests. In the DSI test, it was caused by the slow servoloop response time associated with the large number of limit channels employed in the multiple control strategy.


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    Titel :

    Deep space 1 spacecraft vibration qualification testing


    Weitere Titelangaben:

    Schwingungsprüfung des Raumschiffs Deep Space 1


    Beteiligte:
    Chang, K.Y. (Autor:in)

    Erschienen in:

    Sound and Vibration ; 35 , 3 ; 14-17


    Erscheinungsdatum :

    2001


    Format / Umfang :

    4 Seiten, 12 Bilder, 2 Quellen



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch





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