A New Generation Spherical Actuator is designed for rear view mirrors in modern automobiles. The present research deals with the design of a bistable compliant locking mechanism for this New Generation Mirror Actuator. A Functionally binary pinned-pinned (FBPP) segment is also designed. Discussion on related topics like bistable mechanisms, compliant mechanisms and rigid body mechanisms becomes the foundation for this research. A testing rig was constructed to test the design. The design met the required attributes to be compliant and bistable, and it also emphasized on decreasing the number of parts in the whole assembly of the spherical actuator to minimize the total production cost. Limitations of the design: The balancing of the stator sphere with the four FBPPs is very important and testing for this property was not possible using the constructed testing rig. Higher order of thickness for the FBPP could make it more rigid and less compliant, thus the selection of the thickness is an important criteria. Slight difference in the four FBPPs tested (separately) was observed. An error in the inclination of the FBPP during the assembly of the actuator could result in a force lesser than the design force, able to perform the click operation. Thus the assembly procedures play a very important role in the performance of the mechanism. The limitations of the testing rig are: There is no provision for the measurement of the compression/tension reaction forces when the adjustable screws are moved in and out. Errors in the micro-positioner can be very influential, as the conclusions and the reality analysis are totally dependent on the micro-positioner. The distance of 0.5 mm gap is too small to be observed during the testing and there could possibly be an error in the fixation of the limiting pins on each side of the slider (for gap of 0.5 mm). This could result in minor errors in the angle of inclination of the FBPP. The actual movement between the two-bistable positions is too quick to be examined. Therfore a video camera should be used to freeze the motion for further review.


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    Titel :

    Design of a bistable compliant locking mechanism for new generation mirror actuators.


    Weitere Titelangaben:

    Entwurf eines bistabilen Rastmechanismus für einen neuen Typ von Spiegel-Aktuatoren


    Beteiligte:


    Erscheinungsdatum :

    2005


    Format / Umfang :

    26 Seiten, 26 Bilder, 2 Tabellen, 30 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch





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