Reliability Evaluation Method for Robot Servo System Based on Accelerated Degradation Test

This paper proposes a new reliability evaluation method for servo systems based on accelerated degradation test. The weaknesses of systems or components are found via Failure Mode and Effect Analysis (FMEA), by which the status parameters reflecting the system degradation could be determined. Then, an accelerated degradation test (ADT) platform design is introduced, where testing, loading, measuring equipment and control method are given in detail. Based on this platform, the ADT is implemented for a permanent magnet synchronous motor (PMSM) servo system. With the degradation data of the status parameters, the Arrhenius model is introduced to verify the MTBF of the system and evaluate its reliability.