Test Report, Life Cycle and Operational Torque Capability of the Second-Generation Azimuth Drive

摘要

Two test reports are included. The first covers the life cycle and operational torque capability of the second-generation azimuth drive. The life testing demonstrated adequate performance over a simulated 30 year life. The azimuth drive unit efficiency was 7.8% driving against a 40,000 and 86,000 in-lb torque load. The increased torque capacity azimuth drive unit's performance is reported satisfactory. The second test report covers the elevation actuator. Several ball, screw, and nut configurations were life cycle tested and evaluated for use in the elevation actuator. Evaluation testing consisted of: evaluation of lubrication effect on life; evaluation of ball screw race hardness effect on life; and evaluation of screw diameter effect on life. (ERA citation 07:046312)