The results are presented of a test program that evaluated the stiffness, accuracy, torque ripple, frictional losses, and torque holding capability of a 16:1 ratio, 430 N-m (320 ft-lb) planetary roller drive for a potential space vehicle actuator application. The drive's planet roller supporting structure and bearings were found to be the largest contributors to overall drive compliance, accounting for more than half the total. In comparison, the traction roller contacts themselves contributed only 9 percent of the drive's compliance based on an experimentally verified stiffnesss model. Torque ripple tests showed the drive to be extremely smooth, actually providing some damping of input torsional oscillations. The drive also demonstrated the ability to hold static torque with drifts of 7 arc sec or less over a 24-hour period at 35 percent of full load.


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    Title :

    Evaluation of a High-Torque Backlash-Free Roller Actuator


    Contributors:

    Publication date :

    1988


    Size :

    15 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





    Evaluation of a high-torque backlash-free roller actuator

    Steinetz, Bruce M. / Rohn, Douglas A. / Anderson, William | NTRS | 1986


    Evaluation of a High-Torque Backlash-Free Roller Actuator

    Steinetz, Bruce M. / Rohn, Douglas A. / Anderson, William | NTRS | 1986


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